CN101670251B - A kind of manufacture method of spherical anionic surfactant - Google Patents

Abstract

The method for preparing the spherical anionic surfactant has the advantages of less pollution, low forming temperature, short time and good physical and chemical properties, and adopts the granulation process of extrusion and spheronization: mixing the main anionic surfactant material and the auxiliary granulating material, feeding the mixture into an extruder consisting of a screw feeder, an extrusion cylinder and a mesh plate, and processing the mixture to form round strip-shaped materials with different lengths; the round strip-shaped materials are sent into a rounding granulator, the round strip-shaped materials are firstly cut into short cylindrical material particles with consistent length by breaking teeth on a centrifugal turntable which rotates by the rounding granulator, and then all the material particles are kneaded into spherical particles under the combined action of gas among the centrifugal turntable, the material particles, the wall of the granulator cylinder and the wall of the granulator cylinder; the spherical particles are dried and cooled to obtain the spherical anionic surfactant with the solid content of 95-99.5 percent (weight). The invention is suitable for producing the surfactant.

Description

A kind of manufacture method of spherical anionic surfactant

technical field

The invention relates to a manufacturing method of a spherical anionic surfactant product. The product can be used in civil and industrial cleaning agents, foaming agents for building materials and other products.

Background technique

In addition to being supplied in liquid form with a certain concentration (containing ~35% or ~70% active matter), anionic surfactants are also available in the form of powder (fine irregular particles), granules (slightly larger irregular particles), tablets, etc. It is supplied in solid form such as shape or needle (round bar) shape. Previously, solid form anionic surfactants were manufactured by:

The low-concentration slurry with a water content of 60-70% (weight) is used as a raw material, and is prepared by a high-tower spray-drying method. Such as, Japanese patent: JP 55-69698, JP 53-39037, Chinese patent: the disclosed manufacturing method of ZL00131365.7; Prepared by spray drying. Such as Japanese patent: the mode disclosed in JP-A-54-106428. The product obtained by the above method is a powder (fine irregular particle) product with small and irregular particle size and low apparent density. During production and use, the material is easy to agglomerate, resulting in difficulty in dissolution, and simultaneously a large amount of dust is generated. Hazardous to health and pollute the environment.

In the fluidized bed equipment, the granular anionic surfactant is prepared by spraying granulation, agglomeration molding and layer-by-layer coating by spraying high-concentration slurry with a solid content of 60-80% (weight). For example, the manufacturing method disclosed in Chinese patent: ZL 200510048907.6. Also, European Patent No. 6140301 discloses a method for agglomerating a granular detergent by spraying simultaneously a liquid binder and a powder. Prepared according to the above-mentioned method is an approximately spherical, granular anionic surfactant with a larger particle size. However, there are problems such as difficult control of particle size, uneven particle size, wide particle size distribution, low particle strength and easy pulverization, and low particle density affecting dissolution.

Japanese Patent Laid-Open No. 2-222498 discloses a process of continuously drying a vacuum film with a high-concentration slurry with a water content of 20% to 35% (weight). U.S. Patent No. 5,723,433 discloses a method of using a turbulent tube dryer (TTD) to carry out two-phase turbulent heat transfer, and then carry out vacuum flash evaporation to dry anionic surfactants such as fatty acid methyl ester sulfonate, but this method often causes pipeline blockage ,affect production. The key is that the above method does not solve the product granulation technology.

Japanese Patent Laid-Open No. 5-331496 discloses a method in which a high-density detergent paste raw material is input into a cylindrical shell in a vacuum environment, and a high-viscosity film is formed on the inner wall by the head of a rotatable plate blade. , At the same time, make it dry quickly to obtain a method of flake dry matter. What this method produces is flake dry matter, fluidity is poor, and there is the risk of raw material decomposition because of high temperature simultaneously.

U.S. Patent US-A5646107 and Japanese Patent JP-A2002-508783 disclose a method of granulating while drying with a flash dryer. This method has high granulation pressure and high drying temperature, so it is not suitable for the production of heat-sensitive anionic surfactants, and there are also problems such as re-powdering and wide particle size distribution.

Patent WO 2004/111166 discloses a method of first tableting or granulating the slurry, and then pulverizing it into a powder with an average particle size of 100-150 μm.

WO-A95/01959 discloses a process for the manufacture of powdered and granular alkyl sulfates.

In addition, there is currently a needle (round bar)-shaped alkyl sulfate manufacturing technology at home and abroad. It is made of powdered alkyl sulfate and water is used as a binder. It is extruded at a high pressure in a screw extruder, and then cut into long and short round strips by a rotating cutter. material, and then the product is produced after subsequent drying. This method requires high extrusion pressure, high heat generation is easy to generate high temperature, and there is a risk of thermal decomposition of the product. At the same time, the prepared product has poor fluidity, high apparent density, is easy to pulverize, and is difficult to dissolve.

Contents of the invention

The present invention aims to solve the problem that the existing anionic surfactant production methods cannot produce spherical anionic surfactants with easy-to-control particle size, uniform particle size, and suitable particle density and strength, which leads to difficulty in dissolving the anionic surfactant and making it difficult to produce and use. The problem of polluting the environment, and solving the problem that the existing production method has high granulation pressure and high drying temperature, which is not suitable for the manufacture of heat-sensitive anionic surfactants, and the problem that the existing production method has a risk of thermal decomposition of the product due to the high calorific value , provide a kind of manufacture method of spherical anionic surfactant of the present invention for this reason, this method can realize dust-free in the whole process of product manufacture and use, has eliminated pollution and improved working condition; The product spherical shape that this method manufactures The particle strength is suitable, easy to dissolve and not easy to pulverize; this method has short molding time and low temperature, which eliminates the risk of decomposition of heat-sensitive materials.

In order to solve the above problems, the special feature of the technical solution adopted by the present invention is that it adopts the granulation process of extrusion and spheronization; specifically, after mixing the anionic surfactant main material and the granulation auxiliary material, it is sent into the In the extruder composed of extrusion barrel and mesh plate, under the co-extrusion of screw feeder and extrusion barrel, the material passes through the mesh plate to form round strip materials of different lengths; the round strip shape The material is fed into the spheronizer, and the round strip material is first cut off by the broken teeth on the centrifugal turntable rotating the spheronizer into long and short cylindrical material granules, and then the material granules in the centrifugal turntable, material granules, and the barrel wall of the granulator are cut. 1. Under the joint action of the gas between the cylinder walls of the granulator, all the material particles are kneaded into spherical particles; the spherical particles are dried and cooled to obtain a spherical anion surface with a solid content of 95-99.5% (weight). active agent.

The main ingredient of the anionic surfactant can be one or more of fatty alcohol sulfate, α-alkenylsulfonate, alkylbenzenesulfonate, fatty alcohol ether sulfate, fatty acid methyl estersulfonate mixture.

The number of carbon atoms of the alkyl group or alkenyl group in the main material of the anionic surfactant is 8-24. Among the main ingredients, the number of carbon atoms is preferably 12-14 for fatty alcohol sulfate, 14-18 for α-alkenyl sulfonate, and preferably 14-18 for alkylbenzene sulfonate. 10-14, preferably 12-14 for fatty alcohol ether sulfate, and 16-18 for fatty acid methyl ester sulfonate. Said salts may be alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts.

The granulation auxiliary material can be sodium p-toluenesulfonate, sodium sulfate, sodium sulfite, sodium carbonate, sodium bicarbonate, citric acid, sodium citrate (potassium), sodium phosphate, sodium hydrogen phosphate, sodium dihydrogen phosphate, sodium acetate ( potassium), sodium chloride, hydroxypropylmethylcellulose, methylcellulose, sodium carboxymethylcellulose, starch slurry, gelatin solution, gum arabic solution, povidone, water, ethanol, propanol, isopropyl One or more mixtures of alcohols, higher fatty alcohols, and polyethylene glycols.

The moisture content of the surfactant main material before granulation in the present invention is preferably 1.5-25%, preferably 3-20%, more preferably 5-15%.

The total solid content of the mixture of the anionic surfactant main material and the granulation auxiliary material entering the extruder of the present invention is 85%-97%.

优选为 The particle size of the spherical anionic surfactant is

preferably

In the present invention, the surface of the formed spherical anionic surfactant can be coated with a layer of coating layer with a uniform thickness of 0-25% (by weight).

The screw feeder of the extruder of the present invention is composed of single, double or more screws.

The screw speed of the screw feeder of the extruder is 10-150 rpm, preferably 25-100 rpm.

的圆孔，优选为

的圆孔。The mesh plate of the extruder is evenly covered with a diameter of

round hole, preferably

round hole.

The mesh plate of the extruder according to the present invention is coated on the end surface of the extrusion cylinder according to the axial distribution, or is coated on the outer cylindrical surface of the extrusion cylinder with the radial distribution; The mesh plate is in the shape of a flat plate or a hemisphere, and the radially distributed mesh plates are in the shape of a cylinder, a semi-cylindrical or an arc.

The mesh plate on the extruder is a single piece or assembled from multiple pieces.

The rotational speed of the centrifugal turntable in the spheronizer of the present invention is 25-3000r/min, preferably 50-1500r/min.

The extrusion temperature of the extruder is 10-50°C, preferably 20-40°C.

Because the present invention adopts extruder and tumbling granulator to manufacture spherical anionic surfactant, it can realize dust-free in the whole process of surfactant manufacture and use, greatly improving working conditions; the present invention also has finished product High efficiency, suitable spherical particle strength, not easy to pulverize; because the extrusion and spheronization steps of the present invention do not require high temperature treatment, and the forming speed is fast, the risk of decomposition of surfactant heat-sensitive materials is eliminated; the present invention is easy to achieve product spherical Consistent diameter and optional size; the product of the present invention has high true sphericity, smooth surface, is not easy to bridge and agglomerate, and has excellent fluidity; because the present invention can realize optimized consistent particle diameter and apparent density, the product solubility is better than existing There are other similar solid state products. In addition, the present invention can also carry out coating treatment on the product, which can not only realize the special purpose of sustained release, but also further improve performances such as anti-caking property and solubility.

The anionic surfactant main material before granulation of the present invention can adopt the anionic surfactant main material directly from the sulfonation production unit with super high active matter content (active matter content 60%～80%); It can also be The aforementioned materials are pre-dried to reach the water content required for granulation; they can also be dry materials. In addition, it is also allowed to add a small amount of granules remaining after sieving after granulation and drying. The advantages of energy saving and consumption reduction are self-evident by adopting the anionic surfactant main material with ultra-high active matter content (active matter content 60% to 80%) from the sulfonation production plant for granulation.

The present invention has no special requirements on the form of pre-drying of the main material of the anionic surfactant, which may be in the form of spray drying, fluidized bed granulation drying, turbulent heating flash dehumidification and the like.

The dosage of the granulation auxiliary material used in the present invention is 0.5-30% (weight) of the granulation raw material.

In the present invention, there is no special limitation on the machine used for mixing the main material of the anionic surfactant and the granulation auxiliary material, and the machine can be a screw type, a rake type, or the like.

The main functional components of the extruder used in the present invention are a screw feeder, an extrusion cylinder and a mesh plate. in:

1. The screw feeder is composed of single, double or more screws. Commonly used are single-screw and twin-screw extruders. The screw feeder is driven by a motor, and its rotating speed is adjustable, and the rotating speed is between 10-150rpm; preferably between 25-100rpm. The method of speed regulation can be in the form of mechanical speed regulation such as gears, belts, worm gears, etc., and it is more preferable to adopt the form of variable frequency motor speed regulation, so that not only can conveniently realize stepless speed regulation, but also save energy consumption;

优选为

的圆孔；2. The screw feeder is installed in the extrusion barrel, and the mesh plate is installed on the end surface of one end of the extrusion barrel, or covered on the outer cylindrical surface of the extrusion barrel. The mesh plate installed on the end surface of the extrusion cylinder is in the form of a plane or hemispherical surface; while the mesh plate installed on the outer cylindrical surface of the extrusion cylinder is single or multi-piece, and the shape is cylindrical , semi-cylindrical, or arc-shaped. Evenly distributed on the mesh plate with a diameter of

preferably

round hole;

3. In order to adjust the extrusion temperature, a jacket can also be installed on the extrusion cylinder, and the purpose of adjusting the extrusion temperature can be achieved by the medium flowing through the jacket.

The main functional components of the granulator used in the present invention are a granulation cylinder and a centrifugal turntable. The granulation cylinder is a cylinder with an opening upward, and there is a cylinder cover at the upper opening; the centrifugal turntable is installed at the lower part of the granulation cylinder, and its upper end is covered with broken teeth. The centrifugal turntable is driven by a motor, and its rotating speed is adjustable. The rotating speed can be between 25-3000r/min, preferably between 50-1500r/min according to the different diameters of the centrifugal turntable. The method of speed regulation can be in the form of mechanical speed regulation such as gears, belts, worm gears, etc. It is more preferable to adopt the form of frequency conversion motor speed regulation, which can not only realize stepless speed regulation conveniently, but also save energy consumption. In order to adjust the granulation temperature, a jacket can also be installed on the granulation cylinder, and the purpose of adjusting the granulation temperature can be achieved by the medium flowing through the jacket.

In the present invention, the spherical material after granulation in the granulator needs to be further dried, cooled and shaped. There is no special requirement for the drying form, and equipment such as fluidized drying, vacuum drying, and belt drying can be used.

In the present invention, the dry material after drying, cooling and shaping can be further sieved to remove a very small amount (≤5% by weight) of broken particles that affect the appearance. The screened products can enter the silo for packaging. The sieved crumbs are mixed into the granulation raw materials for reuse.

优选为的范围内，根据需要任意选择。The spherical anionic surfactant that the present invention makes, its particle diameter can be in

preferably Within the range, you can choose arbitrarily according to your needs.

The bulk density of the product spherical anionic surfactant of the present invention is in the range of 300-800g/l, and the apparent density of the particles is in the range of 600-1600g/l.

If the spherical anionic surfactant produced by the present invention needs to have a sustained release function, or it is desired to further improve solubility, or it needs to improve its anti-caking property, or it needs to improve its oxidation resistance, or it needs to cover up bad smell, you can choose Appropriate coating materials are used to coat the product. The specific method is: first replace the centrifugal disc of the granulator with a rough end surface, then put the dried spherical product into the granulator, and spray the coating material quantitatively and evenly on the surface of the spherical product through the nozzle. Drying may still be required after coating.

The spherical anionic surfactant manufactured by the present invention is mainly used in product formulas such as civil and industrial cleaning agents, foaming agents for building materials, and the like. Such as civilian toothpaste, detergent, hand sanitizer, washing powder (liquid), shower gel, shampoo, etc.; industrial cleaning agents, functional additives, etc.; concrete foaming agent and gypsum board foaming in the building materials industry agent etc. In particular, it can be applied to general, concentrated, or even super-concentrated washing powder in the form of post-mixing, which can increase the content of active substances, reduce the production cost of washing powder, and help protect the environment.

Detailed ways

The following percentages are by weight unless otherwise indicated.

Example 1.

(1). After 136.5 kilograms of fatty alcohol sodium sulfate with 1.5% alkyl carbon number of 1.5% are mixed, 1.5 kilograms of methyl cellulose and 12.5 kilograms of water are mixed, and 300 kilograms/hour The speed is added to the twin-screw extruder, the screw speed is set to 100r/min, the extrusion temperature is 30°C, and the material is fed from the mesh with a diameter of The wet material is extruded into round strips in the radially distributed mesh plate. After continuing for 30 minutes, 150 kg of round strip-shaped wet material was obtained.

(2). Add 30 kg of the above-mentioned round strip materials to the spheronizer in batches, set the rotating speed of the centrifugal turntable to 400 rpm, and roll and granulate for 120 seconds to obtain 30 kg of spherical wet material. After carrying out 5 batches altogether, obtain the spherical shape wet material of 150 kilograms altogether.

(3). Send 150 kilograms of spherical wet materials into the fluidized bed drying equipment at a speed of 300 kilograms per hour. After 120 minutes of drying and cooling, 137 kilograms of wet materials with a moisture content of 0.8% and a bulk density of 137 kilograms are obtained. It is 329g/l dry material.

(4). After sieving the above 136 kg of dry material, 134 kg was obtained, qualified Spherical fatty alcohol sodium sulfate anionic surfactant.

(5). Mix the crumbs under the sieve back into the granulation raw materials.

Example 2.

按径向分布的网孔板中，挤出成圆条状湿料。持续30分钟后，得到150千克的圆条状湿料。。(1). After 142 kilograms of fatty alcohol sodium sulfate with 15% alkyl carbon number of 16～18 moisture content, 7.5 kilograms of anhydrous sodium sulfate and 0.75 kilogram of hydroxypropyl methyl cellulose are mixed, with The speed of 300 kg/hour is added to the twin-screw extruder, the screw speed is set to 50r/min, the extrusion temperature is 30°C, and the material is fed from the mesh with a diameter of

The wet material is extruded into round strips in the radially distributed mesh plate. After continuing for 30 minutes, 150 kg of round strip-shaped wet material was obtained. .

(2). Put the extruded round strip material into the spheronizer according to each batch of 30 kg, set the temperature at 20°C, and the rotating speed of the centrifugal turntable at 600rpm, and roll and granulate for 90 seconds to obtain a batch of spheronizers. 30 kg of spherical wet material. After carrying out 5 batches of feeding, obtain 150 kilograms of spherical shape wet material.

(3). Send 150 kg of spherical wet material into the fluidized bed drying equipment at a speed of 300 kg/hour. The spherical wet material is discharged after drying, blowing and cooling. After 60 minutes, 134 kg of dry material with a moisture content of 2% and an apparent particle density of 1567 g/l were obtained.

圆球形脂肪醇硫酸钠阴离子表面活性剂。(4). After sieving the above-mentioned 134 kilograms of dry materials, 132 kilograms of qualified

Spherical fatty alcohol sodium sulfate anionic surfactant.

(5). Mix the crumbs under the sieve back into the granulation raw materials.

Example 3.

，按径向分布的网孔板中挤出成圆条状湿料。持续30分钟后，得到15千克的圆条状湿料。(1). 10.75 kilograms of α-alkenyl sulfonate with a water content of 5% and 18 to 24 alkenyl carbon atoms, 3.5 kilograms of sodium p-toluenesulfonate and 0.75 kilograms of ethanol are mixed uniformly and mixed with 10 kilograms The speed per hour is added to the single-screw extruder, the screw speed is set to be 15r/min, the extrusion temperature is 100°C, and the material from the mesh diameter is

, and extrude into a round bar-shaped wet material according to the radial distribution of the mesh plate. After continuing for 30 minutes, 15 kg of round strip-shaped wet material was obtained.

(2). Put the extruded round strip material into the spheronizer according to 0.5 kg per batch, set the temperature at 20°C, rotate the centrifugal disc at 3000rpm, roll and granulate for 30 seconds, and obtain a batch of spheronizers. 0.5 kg of spherical wet material. Carry out 30 batches of feeding altogether, obtain 15 kilograms of spherical shape wet materials.

(3). With 15 kilograms of spherical wet materials, 3 kilograms per batch, after drying 5 batches in the fluidized bed drying equipment at a speed of 120 minutes/batch, 13 kilograms of moisture content is 1.5%, and the bulk density is obtained. It is 615g/l dry material.

圆球形α-烯基磺酸盐阴离子表面活性剂。(4). After sieving the above-mentioned 13 kilograms of dry materials, 12 kilograms of qualified

Spherical α-olefin sulfonate anionic surfactant.

(5). Mix the crumbs under the sieve back into the granulation raw materials.

Example 4.

，按径向分布的网孔板中挤出成圆条状湿料。持续30分钟后，得到150千克的圆条状湿料。(1). After mixing 149.25 kilograms of 149.25 kilograms of alkenyl carbon atoms with 14 to 16 alkenyl carbon atoms and 0.75 kilograms of hydroxypropyl methylcellulose evenly, at 300 kilograms/hour The speed is added to the twin-screw extruder, the screw speed is set to 80r/min, the extrusion temperature is 40°C, and the material is fed from the mesh with a diameter of

, and extrude into a round bar-shaped wet material according to the radial distribution of the mesh plate. After continuing for 30 minutes, 150 kg of round strip-shaped wet material was obtained.

(2). Put the extruded round strip material into the spheronizer according to each batch of 30 kg, set the temperature at 20°C, and the rotating speed of the centrifugal turntable at 300rpm, and roll and granulate for 30 seconds to obtain a batch of spheronizers. 30 kg of spherical wet material. Carry out 5 batches of feed intake altogether, obtain the spherical shape wet material of 150 kilograms.

(3). Send 150 kilograms of spherical wet material into the continuous fluidized bed drying equipment at a speed of 300 kilograms per hour. After 60 minutes, 147 kilograms are obtained with a moisture content of 2% and an apparent particle density of 1167g. /l dry material.

圆球形脂肪酸甲酯磺酸钠阴离子表面活性剂。(4). After sieving the above-mentioned 147 kilograms of dry materials, 145 kilograms of qualified

Spherical sodium fatty acid methyl ester sulfonate anionic surfactant.

(5). Mix the crumbs under the sieve back into the granulation raw materials.

Example 5.

，按径向分布的网孔板中挤出成圆条状湿料。持续30分钟后，得到150千克的圆条状湿料。(1). After 135 kilograms of sodium fatty acid methyl ester sulfonate with a water content of 4% and 16 to 18 alkyl carbon atoms, 15 kilograms of water are mixed uniformly, with a speed of 300 kilograms/hour, it is added to the biscuit In the screw extruder, the screw speed is set to 120r/min, the extrusion temperature is 80°C, and the material from the mesh diameter is

, and extrude into a round bar-shaped wet material according to the radial distribution of the mesh plate. After continuing for 30 minutes, 150 kg of round strip-shaped wet material was obtained.

(2). Put the extruded round strip material into the spheronizer according to each batch of 30 kg, set the temperature at 20°C, and rotate the centrifugal disc at 500rpm, and roll and granulate for 30 seconds to obtain a batch of spheronizers. 30 kg of spherical wet material. Carry out 5 batches of feed intake altogether, obtain the spherical shape wet material of 150 kilograms.

(3). 150 kilograms of spherical shape wet materials are sent into the continuous fluidized bed drying equipment at a speed of 300 kilograms per hour. After 90 minutes, 143 kilograms of wet materials are obtained with a moisture content of 4.5%, and a bulk density of 767g/hour. l dry material.

圆球形脂肪酸甲酯磺酸钠阴离子表面活性剂。(4). After sieving the above 143 kg of dry material, 140 kg is obtained, qualified

Spherical sodium fatty acid methyl ester sulfonate anionic surfactant.

(5). Mix the crumbs under the sieve back into the granulation raw materials.

Example 6.

(1). 111.5 kilograms of fatty alcohol sodium sulfate with 3% alkyl carbon atoms and 12 to 14 fatty alcohol ether sulfuric acid with 25% alkyl carbon atoms in 37 kilograms of water content After mixing salt and 1.5 kg of water evenly, add it into the twin-screw extruder at a speed of 300 kg/hour, set the screw speed to 75r/min, extrude at 30°C, and feed the material from the mesh with a diameter of The wet material is extruded into round strips from the radially distributed mesh plate. After continuing for 30 minutes, 150 kg of round strip-shaped wet material was obtained.

(2). Put the extruded round strip material into the spheronizer according to each batch of 30 kg, set the temperature at 30°C, rotate the centrifugal disc at 1000rpm, roll and granulate for 30 seconds, and obtain a batch of spheronizers. 30 kg of spherical wet material. Carry out 5 batches of feeding altogether, finally obtain 150 kilograms of spherical shape wet materials.

(3). 150 kilograms of spherical shape wet materials are sent into the continuous fluidized bed drying equipment at a speed of 300 kilograms per hour. After 30 minutes, 140 kilograms of wet materials are obtained with a moisture content of 3% and a bulk density of 463g/hour. l, dry material with a particle apparent density of 625g/l.

圆球形脂肪醇硫酸钠和脂肪醇醚磺酸钠的混合物阴离子表面活性剂。(4). After sieving the above 140 kilograms of dry material, 139 kilograms were obtained, qualified

A mixture of spherical fatty alcohol sodium sulfate and fatty alcohol ether sodium sulfonate anionic surfactant.

(5). The crumbs and fine powder under the sieve are reused.

Example 7.

Immediately after the (4) step of Example 1, the centrifugal disc in the spheronizer is replaced with a rough disk without broken teeth, and 30 kilograms of qualified spherical fatty alcohol sodium sulfate is weighed, and it is put into the spheronizer. In the granulator, set the temperature at 30°C, and the rotational speed of the centrifugal disc at 500rpm. Within 10 seconds, spray the hypromellose coating at a uniform speed from the spray nozzle to the spherical fatty alcohol sodium sulfate in the spheronizer. 0.3 kilogram of liquid, and then roll out after 20 seconds, obtain 30 kilograms of outer layers and have the fatty alcohol sodium sulfate of coating.

Example 8.

Immediately after the (4) step of embodiment 1, the centrifugal rotating disk in the spheronizer is changed into a rough dish without broken teeth, and 30 kilograms of qualified spherical fatty alcohol sodium sulfate anionic surfactants are weighed, and its Put it into the spheronizer, set the temperature at 30°C, and the rotating speed of the centrifugal turntable is 500rpm. Within 10 seconds, spray the spherical fatty alcohol sodium sulfate anionic surfactant from the spray nozzle to the spheronizer at a uniform speed. 0.65 kilogram of gum arabic coating liquid, then discharge after rolling 20 seconds, obtain 31 kilograms of outer layers and have the fatty alcohol sodium sulfate of coating.

Claims (11)

1. the manufacturing approach of a spherical anion surfactant; Employing extrudes, round as a ball prilling; With the anion surfactant major ingredient with after the granulation auxiliary material mixes; Send into have the screw rod feed appliance, in the extruder that recipient and mesh plate are formed, under the co-extruded of screw rod feed appliance and recipient, material forms round strip-shaped materials different in size through mesh plate; Said round strip-shaped materials is sent into round as a ball comminutor; The circle strip-shaped materials is cut into the consistent short cylindrical shape material particles of length by the disrumpent feelings tooth on the centrifugal turntable of round as a ball comminutor rotation earlier; Then under the gas acting in conjunction between centrifugal turntable, material particles, comminutor barrel, comminutor barrel, all material particles are crumpled into the spheroidal particle; It is characterized in that: the surfactant major ingredient moisture content before the granulation is 1.5～25%; The solid total content of the anion surfactant major ingredient of entering extruder and the mixture of granulation auxiliary material is 85%～97%; The screw speed of the screw rod feed appliance of extruder is 10～150rpm, and the extrusion temperature of extruder is 10～50 ℃; A said spheroidal material obtains the spherical anion surfactant of solids content 95～99.5% (weight) through dry, cooling.

2. method according to claim 1 is characterized in that: said anion surfactant major ingredient is one or more the mixture in aliphatic alcohol sulfate, α-Xi Jihuangsuanyan, alkylbenzenesulfonate, fatty alcohol ether sulphate, the MES.

3. method according to claim 2 is characterized in that: the carbon number of the alkyl or alkenyl in the anion surfactant major ingredient is 8～24.

4. method according to claim 1 is characterized in that: said granulation auxiliary material is one or more the mixture in paratoluenesulfonic acid sodium salt, sodium sulphate, sodium sulfite, sodium carbonate, sodium acid carbonate, citric acid, natrium citricum (potassium), sodium phosphate, dibastic sodium phosphate, sodium dihydrogen phosphate, sodium acetate (potassium), sodium chloride, hydroxypropyl methylcellulose, methylcellulose, sodium carboxymethylcellulose, starch slurry, gelatin solution, gumwater, PVP, water, ethanol, propyl alcohol, isopropyl alcohol, higher aliphatic, the polyethylene glycol.

5. according to the described method of any claim of claim 1 to 4, it is characterized in that: the particle diameter of spherical anion surfactant is

6. according to the described method of any claim of claim 1 to 4, it is characterized in that: the spherical anion surfactant appearance after moulding coats the uniform coatings of a layer thickness of 0～25% (weight) again.

7. according to the described method of any claim of claim 1 to 4, it is characterized in that: the screw rod feed appliance of extruder by single, two branch or more the racemosus screw rod form.

8. according to the described method of any claim of claim 1 to 4; It is characterized in that: on the mesh plate of extruder, evenly be covered with the circular hole of diameter for

.

9. according to the described method of any claim of claim 1 to 4, it is characterized in that: the mesh plate of extruder is to be coated on the end face of recipient by axial distribution, or is coated on the outer cylinder of recipient with radial distribution; The mesh plate of said axial distribution is flat board or semi-round ball shape, and radially-arranged mesh plate is cylindrical shape, semi-cylindrical shaped or circular arc tubular.

10. method according to claim 9 is characterized in that: the mesh plate on the extruder is perhaps being put together by polylith of monolithic.

11. want described method according to any right of claim 1 to 4, it is characterized in that: the rotating speed of centrifugal turntable is 25～3000r/min in the said round as a ball comminutor.