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CN102701952A - Method for preparing retarded sodium gluconate - Google Patents

Method for preparing retarded sodium gluconate Download PDF

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Publication number
CN102701952A
CN102701952A CN2012101938829A CN201210193882A CN102701952A CN 102701952 A CN102701952 A CN 102701952A CN 2012101938829 A CN2012101938829 A CN 2012101938829A CN 201210193882 A CN201210193882 A CN 201210193882A CN 102701952 A CN102701952 A CN 102701952A
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CN
China
Prior art keywords
sodium gluconate
setting type
type preparation
retardation setting
reaction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012101938829A
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Chinese (zh)
Inventor
柯余良
方云辉
林添兴
于飞宇
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HENAN KEZHIJIE NEW MATERIALS Co Ltd
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HENAN KEZHIJIE NEW MATERIALS Co Ltd
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Priority to CN2012101938829A priority Critical patent/CN102701952A/en
Publication of CN102701952A publication Critical patent/CN102701952A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/584Recycling of catalysts

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention discloses a method for preparing retarded sodium gluconate. The method comprises the following steps of: performing a contact reaction on a glucose solution and an oxygen-containing gas in an alkaline solution in which a Pd-Bi catalyst taking active carbon as a carrier suspends to generate sodium gluconate; and when the residual sugar content of a reactant is less than or equal to 2 percent, ending the reaction, and filtering the catalyst and other impurities out of the material by adopting a bag-type filter under a negative-pressure condition to obtain a sodium gluconate solution of which the concentration is 0.01M-2M. The preparation method has the advantages of short reaction time, high production efficiency, low production cost and stability and recyclability of the catalyst.

Description

A kind of retardation setting type Preparation of Sodium Gluconate
Technical field
The present invention relates to a kind of retardation setting type Preparation of Sodium Gluconate.
Background technology
Sunmorl N 60S is widely used in the concrete aspect as retardant.Sunmorl N 60S can increase concrete plasticity-and intensity as hydroxycarboxylic acid retardant and the compound use of high efficiency water reducing agent, and retardation (promptly postponing concrete initial and final setting time) is arranged.C is depended in condensing of cement 3A and the formed network structure of gypsum hydration afterreaction thing overlap joint intersected with each other.At the aquation initial stage, because Sunmorl N 60S has reduced solution surface tension, solution strengthens the particulate wetting ability, and particulate aquation point alive increases, and has promoted C 3The dissolving of A, Sunmorl N 60S and Ca simultaneously 2+Complexing, make Ca in the solution 2+Concentration reduces, and quickens gypsum dissolution and separates out SO 4 2-, promoted the formation of AFt; Because the crane span structure effect of AFt (ettringite) promotes that slurry condenses; Sunmorl N 60S is adsorbed in particle surface on the other hand, has suppressed C 3A, C 3The growth of the aquation of S, newborn crystalline phase, simultaneously strong adsorption has formed the surface hydration barrier film, makes that point of contact tails off between particle, has weakened intergranular bridging, thereby has prolonged time of coagulation.
In the prior art, the main method of producing Sunmorl N 60S has: biological fermentation process, electrolytic oxidation, homogeneous chemistry oxidation style and heterogeneous catalytic oxidation method.Be main with biological fermentation process and heterogeneous catalytic oxidation method wherein, but adopt the Sunmorl N 60S purity of biological fermentation process preparation not high, impurity is many; The problem that adopts the heterogeneous catalytic oxidation method to exist is a long reaction time, and cost is high and the catalyzer bullion content is high and easy inactivation.
Summary of the invention
The object of the present invention is to provide the retardation setting type Preparation of Sodium Gluconate that a kind of reaction times is short, production efficiency is high, production cost low and catalyzer is stablized and can be recycled.
For reaching above-mentioned purpose, solution of the present invention is:
A kind of retardation setting type Preparation of Sodium Gluconate may further comprise the steps: glucose solution generates Sunmorl N 60S with the oxygen-containing gas contact reacts in being suspended with the basic soln of Pd-Bi catalyzer that activated carbon is a carrier; When residual sugar content is less than or equal to 2% in the reactant, finish reaction, adopt deep bed filter under condition of negative pressure, the catalyzer in the material and other contaminant filters to be fallen, obtain the sodium gluconate solution that concentration is 0.01M-2M.
Further, basic soln is the Pottasium Hydroxide or the sodium hydroxide of ionic membrane, perhaps is similar basic soln.
Further, glucose solution concentration is 0.01M-2M (mol/L), and this concentration helps raising the efficiency, if concentration is lower than this concentration, then influences speed of reaction, if concentration is higher than this concentration, then contacts insufficiently with oxygen, and speed of reaction is low.
Further, catalyzer is 0.005-0.02:1 with the glucose quality ratio, and the mass ratio in this scope helps improving the transformation efficiency of glucose, raises the efficiency, and practices thrift cost.
Further, the pH value of basic soln is 8-9, and the pH value in this scope makes the transformation efficiency of reaction reach best.
Further, oxygen-containing gas is an air, glucose solution is sprayed contact with air, and projection velocity is 100-2000 mlmin -1, in this projection velocity scope, the better effects if that contacts of glucose solution and oxygen.
Further, the temperature of reaction of glucose selective oxidation reaction is 35 ℃-80 ℃, and this range of reaction temperature helps improving transformation efficiency.
Further, the reaction times is 0.5h-20h, in this reaction time range, can reach preferable transformation efficiency, can improve reaction efficiency.
Further, reaction pressure is 1-4Mpa, under this reaction pressure, can reach preferable transformation efficiency.
Further, catalyzer is carrier with the gac, and mass percent is that the Pd of 0.1-10% is as active ingredient; Mass percent is that 0.01-5%Bi is as promotor; And the load of Pd and Bi is Pd behind the first Bi in proper order in the preparation process, and in this scope, catalyst activity is preferable.
After adopting such scheme; The present invention utilizes gac (C) to be the gating catalytic oxidation effect to glucose of the palladium metal of load (Pd) and bismuth (Bi) catalyzer (Pd-Bi/C catalyzer); Glucose is being converted into glucono-, is adopting basic soln neutralization then and obtain Sunmorl N 60S.
The oxidation of glucose under the Pd-Bi/C catalyst action carried out according to oxydehydrogenation mechanism, and wherein bismuth is as promotor, and its effect is a deep oxidation of avoiding the palladium surface; Next is that bismuth has suppressed the irreversible adsorption of reactant on palladium; Thereby make Pd-Bi/ C have high reactivity, thus improved speed of reaction, prolonged the work-ing life of catalyzer; Increased the cycle index of catalyzer, the use cost of the catalyzer of reduction; And under certain pressure, adopted solution to spray the method that contacts with air, increased effective contact area of gas-solid-liquid; Improved the transformation efficiency of Sunmorl N 60S; Thereby improved production efficiency, shortened the reaction times, reduced production cost greatly.
Embodiment
Below in conjunction with specific embodiment the present invention is done detailed explanation.
Embodiment 1
The glucose material of 300Kg is put in the stills for air blowing, added the deionized water (forming concentration is the glucose solution of 0.93M) of 1500Kg and the Pd-Bi/C catalyzer of 1.5Kg simultaneously, catalyzer is carrier with the gac; 5% Pd is as active ingredient; 0.1%Bi is as promotor, and the load of Pd and Bi is Pd behind the first Bi in proper order in the preparation process, and adding the sodium hydroxide of ionic membrane and keeping the pH value is 8; Spray glucose solution and contact with air with making it, projection velocity is 400mlmin -1Heating simultaneously makes temperature rise to 35 ℃; The pressure of keeping stills for air blowing is 2MPa, and behind the oxidizing reaction 6h, the residual sugar content in reactant is less than or equal to 2% (adopting the method for strongly acidic cationic exchange resin to measure); Reaction finishes; Adopt deep bed filter under condition of negative pressure, the catalyzer in the material and other contaminant filters to be fallen (this impurity is solid insoluble, and residual sugar is retained in the solution), promptly obtain the sodium gluconate solution that concentration is 0.93M (concentration of the liquid caustic soda of concentration and the interpolation of this concentration through the glucose solution of original preparation comprehensively obtains).
Embodiment 2
The glucose material of 450Kg is put in the stills for air blowing, added the deionized water (forming concentration is the glucose solution of 1.28M) of 1500Kg and the Pd-Bi/C catalyzer of 4.5Kg simultaneously, catalyzer is carrier with the gac; 9% Pd is as active ingredient; 0.4%Bi is as promotor, and the load of Pd and Bi is Pd behind the first Bi in proper order in the preparation process, and adding the Pottasium Hydroxide of ionic membrane and keeping the pH value is 9; Spray glucose solution and contact with air with making it, projection velocity is 700 mlmin -1Heating simultaneously makes temperature rise to 60 ℃, and the pressure of keeping stills for air blowing is 3MPa, behind the oxidizing reaction 4h; Residual sugar content in reactant is less than or equal to 2%; Reaction finishes, and adopts deep bed filter under condition of negative pressure, the catalyzer in the material and other contaminant filters to be fallen, and promptly obtaining concentration is the 1.28M sodium gluconate solution.
Embodiment 3
The glucose material of 600Kg is put in the stills for air blowing, added the deionized water (forming concentration is the glucose solution of 1.59M) of 1500Kg and the Pd-Bi/C catalyzer of 12Kg simultaneously, catalyzer is carrier with the gac; 6% Pd is as active ingredient; 1%Bi is as promotor, and the load of Pd and Bi is Pd behind the first Bi in proper order in the preparation process, and adding the sodium hydroxid of ionic membrane and keeping the pH value is 8; Spray glucose solution and contact with air with making it, projection velocity is 800mlmin -1Heating simultaneously makes temperature rise to 50 ℃, and the pressure of keeping stills for air blowing is 4MPa, behind the oxidizing reaction 2h; Residual sugar content in reactant is less than or equal to 2%; Reaction finishes, and adopts deep bed filter under condition of negative pressure, the catalyzer in the material and other contaminant filters to be fallen, and promptly obtaining concentration is the 1.59M sodium gluconate solution.
Embodiment 4
The glucose material of 750Kg is put in the stills for air blowing, added the deionized water (forming concentration is the glucose solution of 1.85M) of 1500Kg and the Pd-Bi/C catalyzer of 11Kg simultaneously, catalyzer is carrier with the gac; 10% Pd is as active ingredient; 1%Bi is as promotor, and the load of Pd and Bi is Pd behind the first Bi in proper order in the preparation process, and adding the Pottasium Hydroxide of ionic membrane and keeping the pH value is 9; Spray glucose solution and contact with air with making it, projection velocity is 1000 mlmin -1Heating simultaneously makes temperature rise to 80 ℃, and the pressure of keeping stills for air blowing is 1MPa, behind the oxidizing reaction 3h; Residual sugar content in reactant is less than or equal to 2%; Reaction finishes, and adopts deep bed filter under condition of negative pressure, the catalyzer in the material and other contaminant filters to be fallen, and can obtain concentration is the 1.85M sodium gluconate solution.
Sodium gluconate solution with embodiment 1-4 preparation; Adopt standard cement; The concrete admixture of admixture 0.2%; And the volume of Sunmorl N 60S is 0.1% of the solid volume of admixture folding, according to GB 8076-2008 " concrete admixture ", surveys its concrete coagulating time, dispersiveness and dispersed hold facility.Concrete mix is: cement 360kg/m 3, sand 803kg/m 3, stone 982 kg/m 3, the slump is controlled at 210 ± 10mm, and the gained result is as shown in table 1.
Sample Benchmark Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4
Water consumption/kg 4020 2300 2223 2400 2308
Time of coagulation/h 8 12 13 12.5 13
Slump T 0 205 205 215 210 210
Through the time slump T 1h 150 190 205 195 200
Can find out through the experiment test result, adopt the prepared retardation setting type Sunmorl N 60S of the present invention to prolong the slow setting time preferably, significantly reduce slump-loss, play slow setting and protected the effect of collapsing.
The above is merely preferred embodiment of the present invention, is not the restriction to this case design, and all equivalent variations of doing according to the design key of this case all fall into the protection domain of this case.

Claims (10)

1. retardation setting type Preparation of Sodium Gluconate is characterized in that: may further comprise the steps: glucose solution generates Sunmorl N 60S with the oxygen-containing gas contact reacts in being suspended with the basic soln of Pd-Bi catalyzer that activated carbon is a carrier; When residual sugar content is less than or equal to 2% in the reactant, finish reaction, adopt deep bed filter under condition of negative pressure, the catalyzer in the material and other contaminant filters to be fallen, obtain the sodium gluconate solution that concentration is 0.01M-2M.
2. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1 is characterized in that: basic soln is the Pottasium Hydroxide or the sodium hydroxide of ionic membrane.
3. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1 is characterized in that: glucose solution concentration is 0.01M-2M.
4. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1 is characterized in that: catalyzer is 0.005-0.02:1 with the glucose quality ratio.
5. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1 is characterized in that: the pH value of basic soln is 8-9.
6. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1 is characterized in that: oxygen-containing gas is an air, solution is sprayed contact with air, and projection velocity is 100-2000mlmin -1
7. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1 is characterized in that: the temperature of reaction of glucose selective oxidation reaction is 35 ℃-80 ℃.
8. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1 is characterized in that: the reaction times is 0.5h-20h.
9. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1 is characterized in that: reaction pressure is 1-4MPa.
10. a kind of retardation setting type Preparation of Sodium Gluconate as claimed in claim 1; It is characterized in that: catalyzer is carrier with the gac; Mass percent is that the Pd of 0.1-10% is as active ingredient; Mass percent be 0.01-5%Bi as promotor, and the load of Pd and Bi is Pd behind the first Bi in proper order in the preparation process.
CN2012101938829A 2012-06-13 2012-06-13 Method for preparing retarded sodium gluconate Pending CN102701952A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108079987A (en) * 2018-01-29 2018-05-29 云南森博混凝土外加剂有限公司 A kind of preparation method for the catalyst for being used to prepare sodium gluconate
CN108262040A (en) * 2018-01-29 2018-07-10 云南森博混凝土外加剂有限公司 A kind of catalyst for being used to prepare sodium gluconate

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87100011A (en) * 1987-01-05 1988-07-27 中国石化总公司浙江镇海石化总厂 The manufacture method of Sunmorl N 60S
CN1153166A (en) * 1996-07-09 1997-07-02 桐乡市天融食品添加剂有限责任公司 Method for preparing gluconate in presence of Bi-Pd/C metal catalyst
CN101844082A (en) * 2009-03-25 2010-09-29 阳新县科生化工有限公司 Method for regenerating inactivated palladium-bismuth-carbon catalyst in catalytic oxidation of glucose

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87100011A (en) * 1987-01-05 1988-07-27 中国石化总公司浙江镇海石化总厂 The manufacture method of Sunmorl N 60S
CN1153166A (en) * 1996-07-09 1997-07-02 桐乡市天融食品添加剂有限责任公司 Method for preparing gluconate in presence of Bi-Pd/C metal catalyst
CN101844082A (en) * 2009-03-25 2010-09-29 阳新县科生化工有限公司 Method for regenerating inactivated palladium-bismuth-carbon catalyst in catalytic oxidation of glucose

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
柯余良等: "葡萄糖酸钠的生产工艺研究及其应用", 《混凝土外加剂生产技术和应用新进展学术交流会议论文集》, 14 April 2012 (2012-04-14), pages 167 - 171 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108079987A (en) * 2018-01-29 2018-05-29 云南森博混凝土外加剂有限公司 A kind of preparation method for the catalyst for being used to prepare sodium gluconate
CN108262040A (en) * 2018-01-29 2018-07-10 云南森博混凝土外加剂有限公司 A kind of catalyst for being used to prepare sodium gluconate

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Application publication date: 20121003