CN116420781A - A special storage preservative for late-maturing citrus and its preparation method - Google Patents

Abstract

The invention belongs to the technical field of storage and preservation special for late-maturing oranges, and discloses a storage preservative special for late-maturing oranges and a preparation method thereof. The sodium glutamate prepared by the sodium glutamate preparation method has high purity, and the quality of the preservative is greatly improved; meanwhile, the heating parameters of the heater are obtained through a heating method of the heater, so that a basis is provided for determining a heating stage; then, according to the heating parameters, a heating stage is determined, so that the target heating power of the infrared heating assembly and the target heating power of the electromagnetic heating assembly can be conveniently determined according to the heating stage; and then according to the heating stages, determining the first target heating power of the infrared heating assembly and the second target heating power of the electromagnetic heating assembly, and heating the infrared heating assembly by controlling the infrared heating assembly to heat with the first target heating power and controlling the electromagnetic heating assembly to heat with the second target heating power, so that different heating stages are realized, and the heating effect is improved.

Description

A special storage preservative for late-maturing citrus and its preparation method

technical field

The invention belongs to the technical field of special storage and preservation of late-maturing citrus, and in particular relates to a special storage and fresh-keeping agent for late-maturing citrus and a preparation method thereof.

Background technique

Citrus (Citrus reticulata Blanco) is a plant of Rutaceae and Citrus. In 2021, my country's citrus output will be 55.9561 million tons, ranking first in the world. It is the world's largest citrus producing country, of which Guangxi, Guangdong, Hunan and other places account for more than 45% of the country's output. -October) and late-maturing (November-December), wherein late-maturing varieties account for more than 70%; yet, the purity of the preparation raw material sodium glutamate adopted in the existing late-maturing citrus special-purpose storage preservative and its preparation method is not high, Affect the quality of the preservative; meanwhile, the heating effect of the raw materials during the preparation process is poor.

Through the above analysis, the problems and defects in the prior art are:

(1) The purity of the raw material sodium glutamate used in the existing special storage preservative for late-maturing citrus and its preparation method is not high, which affects the quality of the preservative.

(2) In the preparation process, the heating effect on the preparation raw materials is poor.

(3) The purity of the raw material sodium nitrate used in the antistaling agent is poor, which affects the quality of the antistaling agent.

(4) The raw material ethanol used in the antistaling agent contains impurities, which affects the freshness preservation effect of the antistaling agent.

Contents of the invention

Aiming at the problems in the prior art, the invention provides a special storage preservative for late-maturing citrus and a preparation method thereof.

The present invention is achieved in that a kind of late-ripening citrus special-purpose storage preservative comprises the following component raw materials by weight:

12-25 parts of borax, 2-12 parts of cellulose, 2-6 parts of sucrose ester, 2-4 parts of citric acid, 3-5 parts of sodium glutamate, 0.5-0.9 parts of sodium nitrate, 0.6-0.9 parts of sodium sorbate , 80-110 parts of water, 2-3 parts of oryzanol, 2-7 parts of ascorbic acid, 4-8 parts of lysine, 20-56 parts of ethanol;

The preparation method of described sodium nitrate:

Washing, sieving, crushing and grinding albite into albite powder;

Mix albite powder, fluorite, and 98% sulfuric acid in a mass ratio of 1:3:5, and react at 200°C under autogenous pressure to obtain a solid residue containing calcium sulfate, sodium sulfate, and aluminum sulfate and silicon fluoride gas products;

leaching the solid residue with an aqueous solution, and filtering to obtain an aqueous immersion solution containing sodium sulfate and aluminum sulfate;

The water immersion liquid containing sodium sulfate and aluminum sulfate is placed in a sodium sulfate reaction kettle, and sodium hydroxide solution is added to the water immersion liquid to react, while the water immersion liquid is stirred, and the reaction kettle is controlled The temperature of reaction, after completion of reaction, naturally cools down, filters, obtains sodium sulfate aqueous solution;

The sodium sulfate aqueous solution is placed in a sodium nitrate reaction kettle, calcium nitrate is added to the sodium sulfate aqueous solution, and the solution in the reaction kettle is stirred while adding the calcium nitrate;

The calcium nitrate is reacted with sodium sulfate to generate calcium sulfate precipitate and sodium nitrate, and filtered to obtain a sodium nitrate solution;

The sodium nitrate solution is placed in a crystallization kettle, concentrated, crystallized, filtered, and dried to obtain a finished product of sodium nitrate;

Described ethanol treatment method:

hydrogenating acetic acid in the presence of a catalyst in a reactor to form a crude ethanol product;

separating at least a portion of the caide ethanol product into a light ends stream comprising 95 wt.% ethyl acetate and 30 wt.% acetaldehyde and an ethanol product stream;

and separating at least a portion of said light ends stream in a distillation column to produce an overhead stream comprising acetaldehyde and a residue stream comprising ethyl acetate, wherein said residue stream is substantially free of acetaldehyde and its derivatives, and wherein the distillation column is operated at a pressure greater than atmospheric pressure;

The acetic acid is formed from methanol and carbon monoxide, wherein the methanol, carbon monoxide, and hydrogen for the hydrogenation step are each derived from synthesis gas, and wherein the synthesis gas is derived from a gas selected from the group consisting of natural gas, oil, petroleum, coal, biomass, and combinations thereof carbon source.

A preparation method of a special storage preservative for late-ripening citrus comprises the following steps:

Step 1, put borax, sucrose ester, citric acid, and water into a blender and stir to mix evenly; stir for 10 minutes;

Step 2: After heating the agitator to 55°C with a heater, add sodium glutamate, sodium nitrate, and sodium sorbate to the agitator; stir for 10 minutes; cool down to room temperature and add oryzanol, ascorbic acid, lysine, ethanol, fiber Stir the ingredients to obtain a special storage preservative for late-maturing citrus.

Further, the preparation method of the sodium glutamate is as follows:

1) Add cationic polyelectrolyte to the glutamic acid fermentation broth to capture bacteria, autolysate and miscellaneous proteins in the fermentation broth to form particles of a certain size, and then add ionic surfactant to generate air bubbles and particles Combining, due to the floating of the air bubbles, the entrained particles are separated from the liquid phase, and the glutamic acid fermentation liquid is purified; the glutamic acid fermentation liquid is sterilized through a microfiltration membrane once, and the filtrate is collected; then a modified flocculant accounting for 0.6% of the filtrate is added, The addition ratio of the modified flocculant is the mass ratio. Stir at 200 rpm for 12 minutes, then let it stand for 125 minutes, filter through the microfiltration membrane for the second time, remove the precipitate, and collect the supernatant A; concentrate the supernatant A to one-third of the original volume. One, and then slowly lower the temperature to 25°C, and adjust it into an isoelectric solution;

2) Settling the isoelectric solution for 3 hours, centrifuging, collecting the precipitate A, putting the precipitate A into purified water, and then adding a modified flocculant accounting for 0.5% of the precipitate A, the addition ratio of the modified flocculant is Mass ratio, stirring at 200 rpm for 10 minutes, then filtering with a microfiltration membrane three times to remove the precipitate, collecting the supernatant B, continuing to filter the supernatant B, collecting the filtrate, and concentrating the filtrate to one-third of the original volume One, then adjusted into an isoelectric solution, the temperature was controlled at 16°C, settled for 15 hours, and glutamic acid crystals were collected;

3) Add sodium carbonate aqueous solution with a mass fraction of 10% to the glutamic acid crystals to dissolve and neutralize, control the temperature at 60-62° C., evaporate and crystallize, separate sodium glutamate by centrifugation, and dry to obtain the product.

Further, the modified flocculant is prepared according to the following process:

Add purified water accounting for twice the mass of the modified starch to the modified starch, stir evenly to obtain a suspension, then add sodium carboxymethyl cellulose with the same mass as the modified starch, stir at 200 rpm for 35 minutes, and then place drying at 80°C until the moisture content is below 5%, and the ratio is a mass percentage to obtain modified modified starch;

Take chitosan, sodium humate and pectin according to the mass ratio of 5:1:0.5, mix and stir evenly, then add 2M aqueous sodium hydroxide solution accounting for twice the mass of chitosan, ultrasonic at 35KHz for 15min, and finally 500 rpm /min stirred for 5min to obtain modified chitosan;

Grind corn stalk powder and sepiolite respectively to obtain corn stalk powder and sepiolite powder, mix and stir corn stalk powder, sepiolite powder and diatomite according to the mass ratio of 3:1:1, add to account for diatomite In 1M sodium hydroxide solution with a concentration of 5 times the weight, stir at 200 rpm for 125 min, then filter, dry, and grind into a powder with a particle size of 10-25 mesh;

Mix and stir the modified modified starch, modified chitosan and the powder obtained in step 3) according to the mass ratio of 5:3:2, then place it in a closed reaction kettle, and raise the temperature to 155 ℃, keep warm for 35 minutes, take it out, put it into the mixer, stir at 500 rpm for 3 minutes, get the mixture, put it in an oven, dry it at 85 ℃ for 95 minutes, take it out, and crush it.

Further, the conditions of the primary filtration, secondary filtration and tertiary filtration of the microfiltration membrane are: the microfiltration membrane is an inorganic ceramic membrane, the molecular weight cut-off is 10000Da, and the microfiltration temperature is 40°C; the conditions of the ultrafiltration membrane filtration are : The molecular weight cut-off of the ultrafiltration membrane is 200Da, and the ultrafiltration temperature is 40°C.

Further, the heater heating method is as follows:

1) Configure heater parameters; when the heater is in the heating mode, obtain the heating parameters of the heater; determine the heating stage according to the heating parameters; determine the first stage of the infrared heating component according to the heating stage a target heating power and a second target heating power of the electromagnetic heating assembly;

2) Controlling the infrared heating component to heat with the first target heating power and controlling the electromagnetic heating component to heat with the second target heating power.

Further, according to the heating stage, determining the first target heating power of the infrared heating component and the second target heating power of the electromagnetic heating component includes:

determining a first ratio and a second ratio based on said heating phase;

respectively determining the first target heating power and the second target heating power according to the first ratio and the second ratio,

Wherein, the first target heating power is the product of the first ratio and the total target heating power of the heater, and the second target heating power is the product of the second ratio and the total target heating power of the heater power product;

The sum of the first ratio and the second ratio is less than or equal to 1.

Further, according to the heating stage, determining the first target heating power of the infrared heating component and the second target heating power of the electromagnetic heating component includes:

According to the heating stage, it is determined that the first target heating power of the infrared heating component is equal to a pre-stored first preset threshold value corresponding to the heating stage;

According to the heating stage, it is determined that the second target heating power of the electromagnetic heating component is equal to a prestored second preset threshold corresponding to the heating stage.

Further, the heating parameters include heating temperature, wherein, according to the heating parameters, determining the heating stage includes:

determining the heating temperature;

If the heating temperature is not greater than a first preset heating temperature, then determine that the heating stage is the first heating stage;

If the heating temperature is greater than the first preset heating temperature and lower than a second preset heating temperature, then determining that the heating stage is a second heating stage;

If the heating temperature is not less than the second preset heating temperature, it is determined that the heating stage is a third heating stage.

Further, according to the heating stage, determining the first ratio and the second ratio includes:

determining that the first ratio is equal to a first predetermined ratio, and that the second ratio is equal to a second predetermined ratio, wherein the first predetermined ratio is less than the second predetermined ratio;

When the heating stage is the first heating stage, the first ratio and the second ratio remain unchanged;

When the heating stage is the second heating stage, the first ratio is increased or decreased, and the second ratio is decreased or increased according to the heating duration or the increase or decrease of the heating temperature;

When the heating stage is the third heating stage, change the first ratio to a third preset ratio and change the second ratio to a fourth preset ratio, wherein the third preset ratio is greater than The fourth preset ratio.

Combining the above-mentioned technical solutions and technical problems to be solved, please analyze the advantages and positive effects of the technical solutions to be protected by the present invention from the following aspects:

First, in view of the technical problems existing in the above-mentioned prior art and the difficulty of solving the problems, closely combine the technical solution to be protected in the present invention and the results and data in the research and development process, etc., to analyze in detail how the technical solution of the present invention solves it Technical problems, some creative technical effects brought about after solving the problems. The specific description is as follows:

The sodium glutamate prepared by the preparation method of sodium glutamate in the present invention has high purity, which greatly improves the quality of the antistaling agent; at the same time, the heating parameters of the heater are obtained by the heater heating method, which provides a basis for determining the heating stage; then according to the heating Parameters to determine the heating stage, so as to determine the target heating power of the infrared heating component and the target heating power of the electromagnetic heating component according to the heating stage; then according to the heating stage, determine the first target heating power of the infrared heating component and the second target of the electromagnetic heating component Heating power and by controlling the infrared heating component to heat with the first target heating power and controlling the electromagnetic heating component to heat with the second target heating power, it is realized for different heating stages, that is, for the specific heating stage, to control the infrared contained in the heater The heating components and electromagnetic heating components are heated according to the allocated power. While reaching the total target heating power, the advantages of fast temperature rise of electromagnetic heating and high absorption efficiency of infrared heating heat energy are also used, thereby improving the heating effect.

The invention can obtain high-purity ethanol through the ethanol treatment method, and greatly improves the fresh-keeping effect of the preservative.

The invention can prepare high-purity sodium nitrate through the preparation method of sodium nitrate, and improve the quality of preservative.

Second, regarding the technical solution as a whole or from the perspective of a product, the technical effects and advantages of the technical solution to be protected by the present invention are specifically described as follows:

The present invention effectively solves the technical problem that the preparation raw material sodium glutamate used in the existing late-maturing citrus special-purpose storage fresh-keeping agent and its preparation method is not high in purity, which affects the quality of the fresh-keeping agent; the heating effect of the preparation raw material is poor during the preparation process, and greatly improves the freshness preservation. The quality of the agent improves the heating effect.

Description of drawings

Fig. 1 is the special storage preservative for late-maturing citrus provided by the embodiment of the present invention and the flow chart of preparation method thereof;

Fig. 2 is the flow chart of the preparation method of sodium glutamate that the embodiment of the present invention provides;

Fig. 3 is a flowchart of a heater heating method provided by an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

1. Explain the embodiment. In order to make those skilled in the art fully understand how to implement the present invention, this part is an explanatory embodiment for explaining the technical solution of the claims.

The invention provides a kind of late-ripening citrus special-purpose storage antistaling agent which comprises the following component raw materials by weight:

12-25 parts of borax, 2-12 parts of cellulose, 2-6 parts of sucrose ester, 2-4 parts of citric acid, 3-5 parts of sodium glutamate, 0.5-0.9 parts of sodium nitrate, 0.6-0.9 parts of sodium sorbate , 80-110 parts of water, 2-3 parts of oryzanol, 2-7 parts of ascorbic acid, 4-8 parts of lysine, 20-56 parts of ethanol;

The preparation method of described sodium nitrate:

Washing, sieving, crushing and grinding albite into albite powder;

Mix albite powder, fluorite, and 98% sulfuric acid in a mass ratio of 1:3:5, and react at 200°C under autogenous pressure to obtain a solid residue containing calcium sulfate, sodium sulfate, and aluminum sulfate and silicon fluoride gas products;

leaching the solid residue with an aqueous solution, and filtering to obtain an aqueous immersion solution containing sodium sulfate and aluminum sulfate;

The water immersion liquid containing sodium sulfate and aluminum sulfate is placed in a sodium sulfate reaction kettle, and sodium hydroxide solution is added to the water immersion liquid to react, while the water immersion liquid is stirred, and the reaction kettle is controlled The temperature of reaction, after completion of reaction, naturally cools down, filters, obtains sodium sulfate aqueous solution;

The sodium sulfate aqueous solution is placed in a sodium nitrate reaction kettle, calcium nitrate is added to the sodium sulfate aqueous solution, and the solution in the reaction kettle is stirred while adding the calcium nitrate;

The calcium nitrate is reacted with sodium sulfate to generate calcium sulfate precipitate and sodium nitrate, and filtered to obtain a sodium nitrate solution;

The sodium nitrate solution is placed in a crystallization kettle, concentrated, crystallized, filtered, and dried to obtain a finished product of sodium nitrate;

Described ethanol treatment method:

hydrogenating acetic acid in the presence of a catalyst in a reactor to form a crude ethanol product;

separating at least a portion of the caide ethanol product into a light ends stream comprising 95 wt.% ethyl acetate and 30 wt.% acetaldehyde and an ethanol product stream;

and separating at least a portion of said light ends stream in a distillation column to produce an overhead stream comprising acetaldehyde and a residue stream comprising ethyl acetate, wherein said residue stream is substantially free of acetaldehyde and its derivatives, and wherein the distillation column is operated at a pressure greater than atmospheric pressure;

The acetic acid is formed from methanol and carbon monoxide, wherein the methanol, carbon monoxide, and hydrogen for the hydrogenation step are each derived from synthesis gas, and wherein the synthesis gas is derived from a gas selected from the group consisting of natural gas, oil, petroleum, coal, biomass, and combinations thereof carbon source.

As shown in Figure 1, a kind of preparation method of late-ripening citrus special-purpose storage fresh-keeping agent comprises the following steps:

S101, put borax, sucrose ester, citric acid, and water into a blender and stir to mix evenly; stir for 10 minutes;

S102, after heating the agitator to 55°C with the heater, add sodium glutamate, sodium nitrate, sodium sorbate to the agitator; stir for 10 minutes; cool down to room temperature and add oryzanol, ascorbic acid, lysine, ethanol, cellulose Stir to obtain the special storage preservative for late-ripening citrus.

As shown in Figure 2, the present invention provides sodium glutamate preparation method as follows:

S201, adding cationic polyelectrolyte to the glutamic acid fermentation broth to capture bacteria, autolysate and miscellaneous proteins in the fermentation broth to form particles of a certain size, and then add ionic surfactants to generate air bubbles and particles Combining, due to the floating of the air bubbles, the entrained particles are separated from the liquid phase, and the glutamic acid fermentation liquid is purified; the glutamic acid fermentation liquid is sterilized through a microfiltration membrane once, and the filtrate is collected; then a modified flocculant accounting for 0.6% of the filtrate is added, The addition ratio of the modified flocculant is the mass ratio. Stir at 200 rpm for 12 minutes, then let it stand for 125 minutes, filter through the microfiltration membrane for the second time, remove the precipitate, and collect the supernatant A; concentrate the supernatant A to one-third of the original volume. One, and then slowly lower the temperature to 25°C, and adjust it into an isoelectric solution;

S202, settle the isoelectric solution for 3 hours, centrifuge, collect the precipitate A, put the precipitate A into purified water, and then add a modified flocculant accounting for 0.5% of the precipitate A, and the addition ratio of the modified flocculant is Mass ratio, stirring at 200 rpm for 10 minutes, then filtering with a microfiltration membrane three times to remove the precipitate, collecting the supernatant B, continuing to filter the supernatant B, collecting the filtrate, and concentrating the filtrate to one-third of the original volume One, then adjusted into an isoelectric solution, the temperature was controlled at 16°C, settled for 15 hours, and glutamic acid crystals were collected;

S203, add sodium carbonate aqueous solution with a mass fraction of 10% to the glutamic acid crystals to dissolve and neutralize, control the temperature at 60-62°C, evaporate and crystallize, separate sodium glutamate by centrifugation, and dry to obtain the product.

The sodium glutamate prepared by the preparation method of the sodium glutamate in the invention has high purity and greatly improves the quality of the antistaling agent.

The present invention provides a modified flocculant prepared according to the following process:

Add purified water accounting for twice the mass of the modified starch to the modified starch, stir evenly to obtain a suspension, then add sodium carboxymethyl cellulose with the same mass as the modified starch, stir at 200 rpm for 35 minutes, and then place drying at 80°C until the moisture content is below 5%, and the ratio is a mass percentage to obtain modified modified starch;

Take chitosan, sodium humate and pectin according to the mass ratio of 5:1:0.5, mix and stir evenly, then add 2M aqueous sodium hydroxide solution accounting for twice the mass of chitosan, ultrasonic at 35KHz for 15min, and finally 500 rpm /min stirred for 5min to obtain modified chitosan;

Grind corn stalk powder and sepiolite respectively to obtain corn stalk powder and sepiolite powder, mix and stir corn stalk powder, sepiolite powder and diatomite according to the mass ratio of 3:1:1, add to account for diatomite In 1M sodium hydroxide solution with a concentration of 5 times the weight, stir at 200 rpm for 125 min, then filter, dry, and grind into a powder with a particle size of 10-25 mesh;

Mix and stir the modified modified starch, modified chitosan and the powder obtained in step 3) according to the mass ratio of 5:3:2, then place it in a closed reaction kettle, and raise the temperature to 155 ℃, keep warm for 35 minutes, take it out, put it into the mixer, stir at 500 rpm for 3 minutes, get the mixture, put it in an oven, dry it at 85 ℃ for 95 minutes, take it out, and crush it.

The present invention provides microfiltration membranes for primary filtration, secondary filtration and three filtration conditions: the microfiltration membrane is an inorganic ceramic membrane, the molecular weight cut-off is 10000Da, and the microfiltration temperature is 40°C; the conditions for the ultrafiltration membrane filtration are: The molecular weight cut-off of the ultrafiltration membrane is 200Da, and the ultrafiltration temperature is 40°C.

As shown in Figure 3, the present invention provides a heater heating method, specifically as follows:

S301, configure heater parameters; when the heater is in the heating mode, acquire the heating parameters of the heater; determine the heating stage according to the heating parameters; determine the first stage of the infrared heating component according to the heating stage a target heating power and a second target heating power of the electromagnetic heating assembly;

S302. Control the infrared heating assembly to heat with the first target heating power and control the electromagnetic heating assembly to heat with the second target heating power.

According to the present invention, determining the first target heating power of the infrared heating component and the second target heating power of the electromagnetic heating component according to the heating stage includes:

determining a first ratio and a second ratio based on said heating phase;

respectively determining the first target heating power and the second target heating power according to the first ratio and the second ratio,

Wherein, the first target heating power is the product of the first ratio and the total target heating power of the heater, and the second target heating power is the product of the second ratio and the total target heating power of the heater power product;

The sum of the first ratio and the second ratio is less than or equal to 1.

According to the present invention, determining the first target heating power of the infrared heating component and the second target heating power of the electromagnetic heating component according to the heating stage includes:

According to the heating stage, it is determined that the first target heating power of the infrared heating component is equal to a pre-stored first preset threshold value corresponding to the heating stage;

According to the heating stage, it is determined that the second target heating power of the electromagnetic heating component is equal to a pre-stored second preset threshold value corresponding to the heating stage;

The heating parameters include heating duration, wherein, according to the heating parameters, determining the heating stage includes:

determining the heating time;

If the heating duration is not greater than a first preset heating duration, then determining that the heating stage is the first heating stage;

If the heating duration is greater than the first preset heating duration and less than a second preset heating duration, then determining that the heating stage is a second heating stage;

If the heating duration is not less than the second preset heating duration, it is determined that the heating stage is a third heating stage.

The present invention provides determining the first ratio and the second ratio according to the heating stage, comprising:

determining that the first ratio is equal to a first predetermined ratio, and that the second ratio is equal to a second predetermined ratio, wherein the first predetermined ratio is less than the second predetermined ratio;

When the heating stage is the first heating stage, the first ratio and the second ratio remain unchanged;

When the heating stage is the second heating stage, the first ratio is increased or decreased, and the second ratio is decreased or increased according to the heating duration or the increase or decrease of the heating temperature;

When the heating stage is the third heating stage, change the first ratio to a third preset ratio and change the second ratio to a fourth preset ratio, wherein the third preset ratio is greater than The fourth preset ratio.

2. Application examples. In order to prove the creativity and technical value of the technical solution of the present invention, this part is the application example of the claimed technical solution on specific products or related technologies.

Example 1

The invention provides a kind of late-ripening citrus special-purpose storage antistaling agent which comprises the following component raw materials by weight:

12 parts of borax, 2 parts of cellulose, 2 parts of sucrose ester, 2 parts of citric acid, 3 parts of sodium glutamate, 0.5 parts of sodium nitrate, 0.6-0.9 parts of sodium sorbate, 800 parts of water, 2 parts of oryzanol, ascorbic acid 2 parts, 4 parts of lysine, 20 parts of ethanol.

A preparation method of a special storage preservative for late-ripening citrus comprises the following steps:

S101, put borax, sucrose ester, citric acid, and water into a blender and stir to mix evenly; stir for 10 minutes;

S102, after heating the agitator to 55°C with the heater, add sodium glutamate, sodium nitrate, sodium sorbate to the agitator; stir for 10 minutes; cool down to room temperature and add oryzanol, ascorbic acid, lysine, ethanol, cellulose Stir to obtain the special storage preservative for late-ripening citrus.

Example 2:

The invention provides a kind of late-ripening citrus special-purpose storage antistaling agent which comprises the following component raw materials by weight:

25 parts of borax, 12 parts of cellulose, 6 parts of sucrose ester, 4 parts of citric acid, 5 parts of sodium glutamate, 0.9 parts of sodium nitrate, 0.9 parts of sodium sorbate, 110 parts of water, 3 parts of oryzanol, 7 parts of ascorbic acid , 8 parts of lysine, 56 parts of ethanol.

A preparation method of a special storage preservative for late-ripening citrus comprises the following steps:

S101, put borax, sucrose ester, citric acid, and water into a blender and stir to mix evenly; stir for 10 minutes;

S102, after heating the agitator to 55°C with the heater, add sodium glutamate, sodium nitrate, sodium sorbate to the agitator; stir for 10 minutes; cool down to room temperature and add oryzanol, ascorbic acid, lysine, ethanol, cellulose Stir to obtain the special storage preservative for late-ripening citrus.

It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in memory and executed by a suitable instruction execution system such as a microprocessor or specially designed hardware. Those of ordinary skill in the art will understand that the above-described devices and methods can be implemented using computer-executable instructions and/or contained in processor control code, for example, on a carrier medium such as a magnetic disk, CD or DVD-ROM, such as a read-only memory Such code is provided on a programmable memory (firmware) or on a data carrier such as an optical or electronic signal carrier. The device and its modules of the present invention may be implemented by hardware circuits such as VLSI or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., It can also be realized by software executed by various types of processors, or by a combination of the above hardware circuits and software such as firmware.

3. Evidence of the relevant effects of the embodiment. The embodiment of the present invention has achieved some positive effects in the process of research and development or use, and indeed has great advantages compared with the prior art. The following content is described in conjunction with the data and charts of the test process.

Embodiment 1: Citrus fresh-keeping period reaches 60 days, storage 30 days, good fruit rate is 96%, storage 45 days, good fruit rate is 94%, storage 60 days, good fruit rate is 90%.

Embodiment 2: The fresh-keeping period of citrus reaches 60 days, and the good fruit rate is 95% when stored for 30 days, and the good fruit rate is 92% after being stored for 45 days, and the good fruit rate is 91% after being stored for 60 days.

The sodium glutamate prepared by the preparation method of sodium glutamate in the present invention has high purity, which greatly improves the quality of the antistaling agent; at the same time, the heating parameters of the heater are obtained by the heater heating method, which provides a basis for determining the heating stage; then according to the heating Parameters to determine the heating stage, so as to determine the target heating power of the infrared heating component and the target heating power of the electromagnetic heating component according to the heating stage; then according to the heating stage, determine the first target heating power of the infrared heating component and the second target of the electromagnetic heating component Heating power and by controlling the infrared heating component to heat with the first target heating power and controlling the electromagnetic heating component to heat with the second target heating power, it is realized for different heating stages, that is, for the specific heating stage, to control the infrared contained in the heater The heating components and electromagnetic heating components are heated according to the allocated power. While reaching the total target heating power, the advantages of fast temperature rise of electromagnetic heating and high absorption efficiency of infrared heating heat energy are also used, thereby improving the heating effect.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Anyone familiar with the technical field within the technical scope disclosed in the present invention, whoever is within the spirit and principles of the present invention Any modifications, equivalent replacements and improvements made within shall fall within the protection scope of the present invention.

Claims (10)

1. a special storage preservative for late-maturing citrus, characterized in that, the special storage preservative for late-maturing citrus comprises the following component raw materials by weight: 12-25 parts of borax, 2-12 parts of cellulose, 2-6 parts of sucrose ester, 2-4 parts of citric acid, 3-5 parts of sodium glutamate, 0.5-0.9 parts of sodium nitrate, 0.6-0.9 parts of sodium sorbate , 80-110 parts of water, 2-3 parts of oryzanol, 2-7 parts of ascorbic acid, 4-8 parts of lysine, 20-56 parts of ethanol; The preparation method of described sodium nitrate: Washing, sieving, crushing and grinding albite into albite powder; Mix albite powder, fluorite, and 98% sulfuric acid in a mass ratio of 1:3:5, and react at 200°C under autogenous pressure to obtain a solid residue containing calcium sulfate, sodium sulfate, and aluminum sulfate and silicon fluoride gas products; leaching the solid residue with an aqueous solution, and filtering to obtain an aqueous immersion solution containing sodium sulfate and aluminum sulfate; The water immersion liquid containing sodium sulfate and aluminum sulfate is placed in a sodium sulfate reaction kettle, and sodium hydroxide solution is added to the water immersion liquid to react, while the water immersion liquid is stirred, and the reaction kettle is controlled The temperature of reaction, after completion of the reaction, naturally cools, filters, obtains sodium sulfate aqueous solution; The sodium sulfate aqueous solution is placed in a sodium nitrate reaction kettle, calcium nitrate is added to the sodium sulfate aqueous solution, and the solution in the reaction kettle is stirred while adding the calcium nitrate; The calcium nitrate is reacted with sodium sulfate to generate calcium sulfate precipitate and sodium nitrate, and filtered to obtain a sodium nitrate solution; The sodium nitrate solution is placed in a crystallization kettle, concentrated, crystallized, filtered, and dried to obtain a finished product of sodium nitrate; Described ethanol treatment method: hydrogenating acetic acid in the presence of a catalyst in a reactor to form a crude ethanol product; separating at least a portion of the caide ethanol product into a light ends stream comprising 95 wt.% ethyl acetate and 30 wt.% acetaldehyde and an ethanol product stream; and separating at least a portion of said light ends stream in a distillation column to produce an overhead stream comprising acetaldehyde and a residue stream comprising ethyl acetate, wherein said residue stream is substantially free of acetaldehyde and its derivatives, and wherein the distillation column is operated at a pressure greater than atmospheric pressure; The acetic acid is formed from methanol and carbon monoxide, wherein the methanol, carbon monoxide, and hydrogen for the hydrogenation step are each derived from synthesis gas, and wherein the synthesis gas is derived from a gas selected from the group consisting of natural gas, oil, petroleum, coal, biomass, and combinations thereof carbon source. 2. a preparation method of special storage preservative for late-maturing citrus as claimed in claim 1, characterized in that, the preparation method of special storage preservative for late-maturing citrus comprises the following steps: Step 1, put borax, sucrose ester, citric acid, and water into a blender and stir to mix evenly; stir for 10 minutes; Step 2: After heating the agitator to 55°C with a heater, add sodium glutamate, sodium nitrate, and sodium sorbate to the agitator; stir for 10 minutes; cool down to room temperature and add oryzanol, ascorbic acid, lysine, ethanol, fiber Stir the ingredients to obtain a special storage preservative for late-maturing citrus. 3. the preparation method of late-ripening citrus special-purpose storage antistaling agent as claimed in claim 2, is characterized in that, described Sodium Glutamate preparation method is as follows: 1) Add cationic polyelectrolyte to the glutamic acid fermentation broth to capture bacteria, autolysate and miscellaneous proteins in the fermentation broth to form particles of a certain size, and then add ionic surfactant to generate air bubbles and particles Combining, due to the floating of the air bubbles, the entrained particles are separated from the liquid phase, and the glutamic acid fermentation liquid is purified; the glutamic acid fermentation liquid is sterilized through a microfiltration membrane once, and the filtrate is collected; then a modified flocculant accounting for 0.6% of the filtrate is added, The addition ratio of the modified flocculant is the mass ratio. Stir at 200 rpm for 12 minutes, then let it stand for 125 minutes, filter through the microfiltration membrane for the second time, remove the precipitate, and collect the supernatant A; concentrate the supernatant A to one-third of the original volume. One, and then slowly lower the temperature to 25°C, and adjust it into an isoelectric solution; 2) Settling the isoelectric solution for 3 hours, centrifuging, collecting the precipitate A, putting the precipitate A into purified water, and then adding a modified flocculant accounting for 0.5% of the precipitate A, the addition ratio of the modified flocculant is Mass ratio, stirring at 200 rpm for 10 minutes, then filtering with a microfiltration membrane three times to remove the precipitate, collecting the supernatant B, continuing to filter the supernatant B, collecting the filtrate, and concentrating the filtrate to one-third of the original volume One, then adjusted into an isoelectric solution, the temperature was controlled at 16°C, settled for 15 hours, and glutamic acid crystals were collected; 3) Add sodium carbonate aqueous solution with a mass fraction of 10% to the glutamic acid crystals to dissolve and neutralize, control the temperature at 60-62° C., evaporate and crystallize, separate sodium glutamate by centrifugation, and dry to obtain the product. 4. the preparation method of late-maturing citrus special-purpose storage antistaling agent as claimed in claim 3, is characterized in that, described modified flocculant obtains according to following process preparation: Add purified water accounting for twice the mass of the modified starch to the modified starch, stir evenly to obtain a suspension, then add sodium carboxymethyl cellulose with the same mass as the modified starch, stir at 200 rpm for 35 minutes, and then place drying at 80°C until the moisture content is below 5%, and the ratio is a mass percentage to obtain modified modified starch; Take chitosan, sodium humate and pectin according to the mass ratio of 5:1:0.5, mix and stir evenly, then add 2M aqueous sodium hydroxide solution accounting for twice the mass of chitosan, ultrasonic at 35KHz for 15min, and finally 500 rpm /min stirred for 5min to obtain modified chitosan; Grind corn stalk powder and sepiolite respectively to obtain corn stalk powder and sepiolite powder, mix and stir corn stalk powder, sepiolite powder and diatomite according to the mass ratio of 3:1:1, add to account for diatomite In 1M sodium hydroxide solution with a concentration of 5 times the weight, stir at 200 rpm for 125 min, then filter, dry, and grind into a powder with a particle size of 10-25 mesh; Mix and stir the modified modified starch, modified chitosan and the powder obtained in step 3) according to the mass ratio of 5:3:2, then place it in a closed reaction kettle, and raise the temperature to 155 ℃, keep warm for 35 minutes, take it out, put it into the mixer, stir at 500 rpm for 3 minutes, get the mixture, put it in an oven, dry it at 85 ℃ for 95 minutes, take it out, and crush it. 5. as claimed in claim 3, the preparation method of special storage preservative for late-ripening citrus, is characterized in that, the conditions of said microfiltration membrane one-time filtration, secondary filtration and three-time filtration are: microfiltration membrane is an inorganic ceramic membrane, intercepts The molecular weight is 10000Da, and the microfiltration temperature is 40°C; the conditions for the ultrafiltration membrane filtration are: the molecular weight cut-off of the ultrafiltration membrane is 200Da, and the ultrafiltration temperature is 40°C. 6. the preparation method of late-maturing citrus special-purpose storage antistaling agent as claimed in claim 2, is characterized in that, described heater heating method is specifically as follows: 1) Configure heater parameters; when the heater is in the heating mode, obtain the heating parameters of the heater; determine the heating stage according to the heating parameters; determine the first target of the infrared heating component according to the heating stage heating power and the second target heating power of the electromagnetic heating assembly; 2) Controlling the infrared heating component to heat with the first target heating power and controlling the electromagnetic heating component to heat with the second target heating power. 7. The preparation method of the special storage preservative for late-ripening citrus as claimed in claim 6, wherein, according to the heating stage, the first target heating power of the infrared heating assembly and the second target heating power of the electromagnetic heating assembly are determined. Heating power, including: determining a first ratio and a second ratio based on said heating phase; respectively determining the first target heating power and the second target heating power according to the first ratio and the second ratio, Wherein, the first target heating power is the product of the first ratio and the total target heating power of the heater, and the second target heating power is the product of the second ratio and the total target heating power of the heater power product; The sum of the first ratio and the second ratio is less than or equal to 1. 8. The preparation method of the special storage preservative for late-ripening citrus as claimed in claim 6, wherein, according to the heating stage, the first target heating power of the infrared heating assembly and the second target heating power of the electromagnetic heating assembly are determined. Heating power, including: According to the heating stage, it is determined that the first target heating power of the infrared heating component is equal to a pre-stored first preset threshold value corresponding to the heating stage; According to the heating stage, it is determined that the second target heating power of the electromagnetic heating component is equal to a prestored second preset threshold corresponding to the heating stage. 9. The preparation method of the special storage preservative for late-ripening citrus as claimed in claim 7, wherein said heating parameters comprise heating temperature, wherein said heating stage is determined according to the heating parameters, comprising: determining the heating temperature; If the heating temperature is not greater than a first preset heating temperature, then determine that the heating stage is the first heating stage; If the heating temperature is greater than the first preset heating temperature and lower than a second preset heating temperature, then determining that the heating stage is a second heating stage; If the heating temperature is not less than the second preset heating temperature, it is determined that the heating stage is a third heating stage. 10. The preparation method of the special storage preservative for late-ripening citrus as claimed in claim 9, wherein, according to the heating stage, determining the first ratio and the second ratio comprises: determining that the first ratio is equal to a first predetermined ratio, and that the second ratio is equal to a second predetermined ratio, wherein the first predetermined ratio is smaller than the second predetermined ratio; When the heating stage is the first heating stage, the first ratio and the second ratio remain unchanged; When the heating stage is the second heating stage, the first ratio is increased or decreased, and the second ratio is decreased or increased according to the heating duration or the increase or decrease of the heating temperature; When the heating stage is the third heating stage, change the first ratio to a third preset ratio and change the second ratio to a fourth preset ratio, wherein the third preset ratio is greater than The fourth preset ratio.

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