SLS-P(Sodium Lauryl Sulfate-Powder),CAS 151-21-3

SHANGHAI PROVCHEM INDUSTRIAL CO., LTD., RELYING ON SICHUAN WILLOW GREEN BIOTECHNOLOGY CO., LTD. AND SHANXI WILLOW GREEN BIOTECHNOLOGY CO., LTD., IS A BIOTECHNOLOGY ENTERPRISE INTEGRATING THE RESEARCH AND DEVELOPMENT, PRODUCTION AND SALES OF COSMETIC RAW MATERIALS, APIS, PHARMACEUTICAL INTERMEDIATES, PESTICIDES, AND AMINO ACIDS. THE COMPANY IS LOCATED IN OFFICE 2925, BUILDING 1, DANING MUSICAL PLAZA, NO.1 LANE 177, WANRONG ROAD, SHANGHAI. IT IS ONE OF THE FEW COMPANIES IN CHINA WITH THE QUALIFICATIONS AND PROCEDURES FOR WARANG CYANIDE AND SODIUM AZIDE.

SINCE ITS ESTABLISHMENT IN 1998, THE FACTORY HAS EXPANDED TO MORE THAN 20,000 SQUARE METERS, WITH A TOTAL INVESTMENT OF MORE THAN 200 MILLION YUAN AND AN ANNUAL OUTPUT VALUE OF MORE THAN 500 MILLION YUAN. THE FACTORY HAS COMPLETE SUPPORTING FACILITIES SUCH AS A SPECIAL CHEMICAL WAREHOUSE, A WELL-EQUIPPED QUALITY INSPECTION DEPARTMENT, A RESEARCH AND DEVELOPMENT TEST DEPARTMENT, AND ENVIRONMENTAL PROTECTION TREATMENT FACILITIES. AT THE SAME TIME, IT HAS MORE THAN 150 EMPLOYEES, INCLUDING 30 MANAGEMENT PERSONNEL, 20 QUALITY INSPECTION PERSONNEL, AND TECHNICAL PERSONNEL ACCOUNT FOR ABOUT 30% OF THE TOTAL NUMBER OF EMPLOYEES. RELYING ON THE EXPERIENCED PROCESS RESEARCH AND DEVELOPMENT, PRODUCTION MANAGEMENT AND MARKETING TEAM IN THE BIOPHARMACEUTICAL INDUSTRY, THE COMPANY MAINTAINS CLOSE RESEARCH AND DEVELOPMENT COOPERATION WITH THE PHARMACEUTICAL AND CHEMICAL ENGINEERING COLLEGES OF MANY UNIVERSITIES IN SHANGHAI, SICHUAN AND SHANXI PROVINCE, CONTINUOUSLY IMPROVING THE SCIENTIFIC AND TECHNOLOGICAL CONTENT OF PRODUCTS AND ENSURING THE ADVANCED NATURE OF RESEARCH AND DEVELOPMENT TECHNOLOGY.

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Sodium dodecyl sulfate Use and Manufacturing

Methods of Manufacturing

1. The dodecanol and chlorosulfonic acid were fed at a molar ratio of 1: 1.03 and subjected to a sulfonation reaction at 30-35 ° C. The resulting sulfonate was neutralized with 30% sodium hydroxide to give sodium dodecyl sulfate, Hydrogen peroxide bleaching, spray drying that was finished. Raw material consumption (kg / t) lauryl alcohol (C12> 85%) 725 caustic soda (NaOH> 95%) 183 chlorosulfonic acid (> 95%) 458.

2. Dodecyl alcohol and chlorosulfonic acid at 40 ~ 50 ℃ by sulfation to produce lauryl sulfate, sodium hydroxide and then neutralized by bleaching, sedimentation, spray drying made. 3. Twelve fans of sodium sulfate preparation methods are many, the most commonly used are the following two. The sulfur trioxide reaction unit is a vertical reactor. Nitrogen was passed through the gas spout at 32 & lt; 0 & gt; C into the reactor. The nitrogen flow rate is 85. 9 L · min-1. In 82.7 kPa access to lauryl alcohol, flow 58 g min-1. The liquid sulfur trioxide is at 124.1 kPa under the flash into the flash, the flash temperature maintained at 100 ℃, sulfur trioxide flow control at 0.907 2 kg · h-1. The sulfated product was then quenched rapidly to 50 ° C and allowed to enter the aged apparatus for 10 to 20 minutes. And finally into the neutralization kettle and alkali. Neutralization temperature control at 50 ℃, when the pH value to 7 ~ 8.5 when the material, that was liquid products. Spray dried to obtain a solid product. Chlorosulfonation Method The lauryl alcohol was put into a reaction kettle and preheated to 30 ° C. And then in the high-speed mixing will be more than the theoretical amount of 0.03 mol of chlorosulfonic acid is sprayed into the alcohol in mist. The reaction temperature is controlled at 30 to 35 ° C. After completion of the sulfation reaction, the kettle was neutralized with 30% of the base solution to a pH of 7 to 8.5. And finally bleached with 0.4% (mass) of hydrogen peroxide. Spray dried to obtain a solid. Also can be dubbed the quality standard solution. The continuous reaction device is a tubular reactor. The lauryl alcohol is first saturated with hydrogen chloride. Lauryl alcohol4 g · min-1 flow rate, hydrogen chloride at 40 ° C.The flow rate of 5 g · min-1 enters the saturated chamber through the meter. The hydrogen chloride solution of lauryl alcohol was then passed at 21.4 ° C to the reactor with chlorosulfonic acid. After the reactants are separated by gas-liquid, the sulfated product flows from the bottom of the separator into the neutralization kettle. And neutralized with 30% sodium hydroxide at 50 ° C to obtain a liquid product. Spray dried to obtain a solid product.

4. Chlorosulfonic acid (or liquid sulfur trioxide) is slowly added to the dodecanol (lauryl alcohol) under stirring and cooling, the ratio of the mass of chlorosulfonic acid to dodecanol is 1.03: 1, The control temperature does not exceed 30 ℃, the reaction temperature does not exceed 35 ℃, stirring reaction 2H. After completion of the reaction, the reaction solution was poured into an ice-water mixture, the controlled temperature did not exceed 50 ° C, and then neutralized with 30% sodium hydroxide solution to alkaline. Evaporation to thicken, after cooling, crushed lumps, filtered, washed with ethanol, drying, that is finished.

5. According to the requirements of different users of the industry, fatty alcohol sodium sulfate to be made into various forms of goods, such as powder, granular, sheet products, generally can be obtained by the following two methods.(1) spray drying method using the method can be obtained powder products. This is the domestic fatty alcohol sodium sulfate (powder K-12) The traditional production method of the product. Production scale is generally small, and for intermittent operation, product yield is low.(2) vacuum dehydration drying method The use of scraping film evaporator, the low concentration of the slurry in the evaporator by means of the rotation of the scraper in the inner wall into a film, in the use of external jacket steam heating at the same time vacuum Dehydration, can make fatty alcohol sodium sulfate active content of 70% to 80%, further processing can be granular, needle or flake products.

6. The preparation method includes the sulfonation of n-alkanes, the separation and neutralization of the sulfonated products, stripping the raw material oil from the neutralization product and the like. Sulfur dioxide and oxygen are introduced from the gas distributor at the bottom of the sulfur oxidation reactor so that it is well distributed in the liquid phase consisting of n-alkanes and water to control the reaction temperature below 40 ° C. The residence time of the liquid material in the reactor is 6 to 7 min. The reaction mass enters the separator from the bottom of the reactor and the separated oil phase is returned to the reactor. The separated sulfonic acid solution was removed from the sulfur dioxide by gas separator and then introduced into the evaporator. The sulfuric acid phase (lower) sulfonic acid phase (upper) was allowed to enter the neutralization reactor and neutralized with 50% sodium hydroxide. That is the product. Feed ratio n-alkanes: sulfur dioxide = 1: (1.08 to 1.10) liquid phase (weight ratio) alkanes: water = 1:1 gas phase (volume ratio) sulfur dioxide: air = 2.5:1 airflow speed 3.5 ~ 5.

Uses

1. Surfactants, decontamination, foaming, wetting agents, etc. 2. Relatively low-level ion pair reagents are cheaper than heptane and sodium pentane sulfonate when the requirements are not high. 3. Used as raw materials and modified materials 4, capillary electrophoresis analysis, additives, generally used as a molar solution5, other analytical methods will also be used, such as flow column analysis. Used as washing and textile auxiliary, also used as toothpaste foaming agent, fire-extinguishing foam liquid, emulsion polymerization emulsifier, medical emulsifying and dispersing agent, shampoo and other cosmetic products, and wool detergent.