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Production method of high-purity sodium dodecyl sulfate

A technology of sodium lauryl sulfate and a production method, which is applied in the direction of sulfuric acid ester preparation, chemical instruments and methods, sulfonic acid preparation, etc., can solve the problems of low product purity, high impurity content, and restricting the scope of use of the product, and achieve no The effect of three waste discharge

Inactive Publication Date: 2013-04-24
DONGMING JUJIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, industrialized sodium lauryl sulfate is a raw material for daily necessities. Due to the conventional process route using mixed fatty alcohols (mainly carbon 12-14 alcohols) for sulfonation, neutralization, sedimentation, and spray drying, due to the raw materials used and the production process Due to the limitation, the product has low purity and high impurity content. The impurities are mainly homologues of sodium lauryl sulfate, sodium sulfate, sodium chloride and unreacted fatty alcohol, which restricts the scope of use of the product

Method used

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Embodiment 1

[0017] The production method of the high-purity sodium lauryl sulfate of the present embodiment, its steps are:

[0018] (1) Sulfonation and neutralization: Add 116.52kg of chlorosulfonic acid liquid to 190.18kg of lauryl alcohol (98.1% by mass) for sulfonation reaction to generate sulfuric acid ester (CH 3 (CH 2 ) 11 OSO 3 H), sulfuric acid ester and 118kg mass percentage concentration are that the NaOH of 34% produces neutralization reaction and obtains liquid sodium lauryl sulfate, after measuring the mass percent of sodium lauryl sulfate in this liquid sodium lauryl sulfate The concentration is 38%, 177kg;

[0019] (2) Concentration, crystallization and purification, and solid-liquid separation: Concentrate the liquid sodium lauryl sulfate and precipitate 295kg of solid material in the form of crystal sequins. The mass fraction of sodium lauryl sulfate in the solid material is 60%. The weight moisture content of the material is 39%;

[0020] (3) Low-temperature drying...

Embodiment 2

[0025] The production method of the high-purity sodium lauryl sulfate of the present embodiment, its steps are:

[0026] (1) Sulfonation and neutralization: Add 82.5kg of sulfur trioxide gas to 188.26kg of lauryl alcohol (99% by mass) to generate sulfuric acid ester (CH 3 (CH 2 ) 11 OSO 3 H), sulfuric acid ester and 200kg mass percent concentration are the NaOH of 20% to generate neutralization reaction to obtain liquid sodium lauryl sulfate, after measuring the mass percentage of sodium lauryl sulfate in this liquid sodium lauryl sulfate The concentration is 10%, 42.48kg;

[0027] (2) Concentration, crystallization purification, and solid-liquid separation: Concentrate the liquid sodium lauryl sulfate and precipitate 49.97kg of solid material in the form of crystal sequins. The mass fraction of sodium lauryl sulfate in the solid material is 85%. The weight moisture content of the solid material is 13.1%;

[0028] (3) Low-temperature drying: dry the concentrated solid mat...

Embodiment 3

[0033] The production method of the high-purity sodium lauryl sulfate of the present embodiment, its steps are:

[0034] (1) Sulfonation and neutralization: Add 96kg of sulfur trioxide gas to 187.32kg of lauryl alcohol (99.5% by mass) to generate sulfuric acid ester (CH 3 (CH 2 ) 11 OSO 3 H), sulfuric acid ester and 150kg mass percent concentration are the NaOH of 27% to generate neutralization reaction to obtain liquid sodium lauryl sulfate, after measuring the mass percentage of sodium lauryl sulfate in this liquid sodium lauryl sulfate The concentration is 19%, 80.54kg;

[0035] (2) Concentration, crystallization purification, solid-liquid separation: Concentrate the liquid sodium lauryl sulfate, and precipitate 111.86kg of solid material in the form of crystal sequins. The mass fraction of sodium lauryl sulfate in the solid material is 72%. The weight water content of the solid material is 27.5%;

[0036] (3) Low-temperature drying: dry the concentrated solid material...

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Abstract

The invention belongs to the field of sodium dodecyl sulfate, and especially relates to a production method of sodium dodecyl sulfate. The sodium dodecyl sulfate production method is characterized in comprising the steps that: (1) sulfonation and neutralization are carried out, wherein a sulfonating agent is added into lauryl alcohol, such that a sulfate is produced through a sulfonation reaction; sulfate is subjected to a neutralization reaction with sodium hydroxide, such that liquid sodium dodecyl sulfate is produced; (2) concentration is carried out; (3) drying is carried out, wherein the concentrated solid material is dried, and a drying temperature is 40-100 DEG C; and (4) crushing, molding, and packaging are carried out, wherein the dried solid material is crushed, molded, and packaged, such that products are obtained. The method provided by the invention has the advantages that: with the method, a production process route of sodium dodecyl sulfate used in a conventional daily use material is broken through. The product purity is up to 97% or even higher than 99%. The product can be used in biological pharmacy and chemical reagent production.

Description

(1) Technical field [0001] The invention belongs to the field of sodium lauryl sulfate, in particular to a production method of high-purity sodium lauryl sulfate. (2) Background technology [0002] At present, industrialized sodium lauryl sulfate is a raw material for daily necessities. Due to the conventional process route using mixed fatty alcohols (mainly carbon 12-14 alcohols) for sulfonation, neutralization, sedimentation, and spray drying, due to the raw materials used and the production process Limited, its product purity is low, impurity content is high, and impurity is mainly the homologue of sodium lauryl sulfate, sodium sulfate, sodium chloride and unreacted fatty alcohol, has restricted the scope of use of the product. (3) Contents of the invention [0003] The invention provides a production method for preparing simple high-purity sodium lauryl sulfate. [0004] The present invention is achieved through the following technical solutions: [0005] A kind of p...

Claims

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Application Information

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IPC IPC(8): C07C303/24C07C305/04
CPCC07C303/24C07C303/44C07C305/04C07C303/06
Inventor 汪会宝连雅玲刘伟王立堂商希安靳刚邢刚
Owner DONGMING JUJIN CHEM
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