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Production of granular dodecyl-sodium sulfate

A technology of sodium lauryl sulfate and production process, which is applied in sulfate preparation, organic chemistry and other directions, can solve problems such as damage to employee health, harsh operating environment, and difficulty in dissolving operations, so as to improve subsequent use conditions and reduce dust pollution. , The effect of the process setting is reasonable

Active Publication Date: 2005-10-12
SINOLIGHT CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sodium lauryl sulfate on the market is mainly powdery, and the drying process adopts the spray drying process during production, but there are certain defects in the technology used now: first, sodium lauryl sulfate is a kind of thermosensitive surfactant, It decomposes quickly under the action of high temperature, while the temperature at the top of the tower is generally 250-350°C when spraying powder, and the temperature at the bottom of the tower is 90-120°C. If the spraying production time is long, the material will easily stick to the tower wall and be heated. Afterwards, the material decomposes and cokes, forming small yellow spots or black spots, causing difficulties in continuous production
And powdery sodium lauryl sulfate has hidden danger in application, and powdery sodium lauryl sulfate is easy to agglomerate when dissolving, and dissolving operation becomes difficult; It is easy to cause dust to fly, which not only causes pollution, but also makes the operating environment worse and damages the health of employees
[0003] In order to improve the performance of powdered sodium lauryl sulfate, there are also powders that are further processed to obtain strips, flakes or even granules, but the processing technology and equipment are complicated, the process line is long, the production loss is large, and the product quality is easily polluted

Method used

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  • Production of granular dodecyl-sodium sulfate

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] Sodium lauryl sulfate slurry with a water content of 60% is 50Kg / hr for fluidized bed spray granulation, and the material is sent to the airflow atomizer with a pressure pump, and the air inlet temperature is controlled at 145°C, and the dryer temperature is 70°C , dried for two hours, and screened by a sieving machine, spherical sodium lauryl sulfate with a particle size of φ0.8-1.2mm can be obtained. The target product has a water content of 3%, and the active substance can be produced per hour. Spherical sodium lauryl sulfate product 16Kg, water evaporation is 29Kg / hr. The sieved fine powder is recovered by the cyclone separator and sent to the screw feeder, then added to the fluidized bed, and re-enters the fluidized bed as a seed crystal for spray granulation. After the coarse particles are sized by the granulator, the fine powder and fine particle material are returned to the screw feeder, and re-enter the fluidized bed as crystal seeds for spray granulation. Aft...

Embodiment 2

[0021] Sodium lauryl sulfate slurry with a moisture content of 70% is 50Kg / hr for fluidized bed spray granulation, and the material is sent to the air-flow atomizer with a pressure pump, and the air inlet temperature is controlled at 145°C, and the dryer temperature is 70°C After two hours of drying, spherical sodium lauryl sulfate with a particle size of φ0.8-1.2mm can be obtained. The target product has a water content of 3%, and spherical sodium lauryl sulfate with an active substance of 96% can be produced per hour. The sodium product is 12Kg, and the water evaporation is 35Kg / hr. The sieved fine powder is recovered by the cyclone separator and sent to the screw feeder, then added to the fluidized bed, and re-enters the fluidized bed as a seed crystal for spray granulation. After the coarse particles are sized by the granulator, the fine powder and fine particle material are returned to the screw feeder, and re-enter the fluidized bed as crystal seeds for spray granulation...

Embodiment 3

[0023] Sodium lauryl sulfate slurry with a water content of 60% is 40Kg / hr for fluidized bed spray granulation, and the material is sent to the air-flow atomizer with a pressure pump, and the temperature of the air inlet is controlled at 120°C, and the temperature of the dryer is 60°C After two hours of drying, spherical sodium lauryl sulfate with a particle size of φ0.8-1.2mm can be obtained. The target product has a water content of 3%, and spherical sodium lauryl sulfate with an active substance of 96% can be produced per hour. The sodium product is 13Kg, and the water evaporation is 24Kg / hr. The sieved fine powder is recovered by the cyclone separator and sent to the screw feeder, then added to the fluidized bed, and re-enters the fluidized bed as a seed crystal for spray granulation. After the coarse particles are sized by the granulator, the fine powder and fine particle material are returned to the screw feeder, and re-enter the fluidized bed as crystal seeds for spray ...

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Abstract

Production of particle lauryl sodium sulfate is carried out by delivering liquid or cream lauryl sodium sulfate feed liquid into atomizer in bottom of atomizing granulating fluidized bed by pressure pump, heating air by heat exchanger, entering into bottom of fluidized bed, contacting with material by distributing board on fluidized bed, fluidizing material, continuously atomizing feed liquid by atomizing nozzle of atomizer, coating onto fluidized particle surface, particle growing, contacting with hot air, drying, fluidizing, coating, drying, particle growing to required particle size, lowering temperature of discharging section, discharging from fluidized bed, screening, and packing. Its advantages include low cost, reasonable process, no environmental pollution, and good fluidity and dissolubility.

Description

technical field [0001] The invention relates to a production process of subsequent drying and molding in the production process of sodium lauryl sulfate, in particular to a production process of granular sodium lauryl sulfate. Background technique [0002] Sodium lauryl sulfate, also known as sodium fatty alcohol sulfate, trade name K12, is an excellent anionic surfactant, widely used in detergents, cosmetics, toothpaste and industry, mainly used as toothpaste foaming agent . The sodium lauryl sulfate on the market is mainly powdery, and the drying process adopts the spray drying process during production, but there are certain defects in the technology used now: first, sodium lauryl sulfate is a kind of thermosensitive surfactant, It decomposes quickly under the action of high temperature, while the temperature at the top of the tower is generally 250-350°C when spraying powder, and the temperature at the bottom of the tower is 90-120°C. If the spraying production time is ...

Claims

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Application Information

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IPC IPC(8): C07C303/24C07C305/04
Inventor 沈宏刘维镇邵瑾徐美贞郑攀东杨俏俊
Owner SINOLIGHT CHEM
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