Synthesis process of sodium alkyl polyglucoside hydroxypropyl sulfonate

Abstract

The invention relates to a synthesis process of sodium alkyl polyglucoside hydroxypropyl sulfonate. The synthesis process includes: taking and adding a Na3PO4 water solution into sodium 3-chloro-2-hydroxy propanesulfonate solid with molar weight equal to that of Na3PO4 to synthesize an intermediate sodium 2, 3-epoxy propanesulfonate, mixing a water solution of the intermediate sodium 2, 3-epoxy propanesulfonate with an alkyl polyglucoside water solution of 50% in mass fraction according to a molar ratio of 1.0-4.0:1 to obtain an sodium alkyl polyglucoside hydroxypropyl sulfonate water solution, and performing reduced pressure distillation to remove water to obtain sodium alkyl polyglucoside hydroxypropyl sulfonate. The synthesis process is simple and can be completed through two steps of reaction only, the steps are easy to operate, dewatering is not needed in the second step of reaction, and the synthesis process is easy for industrial large-scale production; salt content in a final product is low, so that water solubility is improved, and the defect that alkyl polyglucoside products are low in water solubility and prone to precipitation at low temperature at high mineralization degree especially in the presence of high-concentration divalent salt is overcome.

Description

technical field [0001] The invention relates to a synthesis process of alkyl polyglycoside sodium hydroxypropyl sulfonate, belonging to the technical field of surfactant preparation. Background technique [0002] Alkyl polyglycosides are green surfactants synthesized from natural renewable resources such as glucose and fatty alcohols, most of which have been widely recognized by the market. However, due to the defects of poor water solubility and easy precipitation at low temperature in the presence of high salinity, especially high concentration of divalent salts, some of these long-chain alkyl polyglycosides are also limited in practical application. Some modified alkyl polyglycoside surfactants, for example, literature (daily chemical industry, 2011,41 (1)) synthesized alkyl glycoside ethyl sulfonate sodium with alkyl glycoside and sodium chloroethyl sulfonate, However, the alkyl glucoside needs to be treated without water in the process, the operation is complicated, th...

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Problems solved by technology

However, due to the defects of poor water solubility and easy precipitation at low temperature in the presence of high salinity, especially high concentration of divalent salts, some of these long-chain alkyl polyglycosides are also limited in practical application. Some modified alkyl polyglycoside surfactants, for example, literature (daily chemical industry, 2011,41 (1)) synthesized alkyl glycoside ethyl sulfonate sodium with alkyl glycoside and sodium chloroethyl sulfonate, However, the alkyl glucoside needs to be treated without water in the process, the operation is complicated, the yield is low, and the cost is high

U.S. Patents 6,627,612, 6,958,315, and 7,507,399 purify alkyl glycosides into different sulfonates, especially 8,124,575 proposes to synthesize alkyl glycosides by reacting 1,3-dichloroisopropanol and hydroxypropyl sulfonate with alkyl glycosides. An assumption of base glycoside sulfonate, but no specific process is disclosed, and it contains equimolar inorganic salts

Although Chinese patent 105418697A discloses a kind of preparation method of alkyl glucoside sulfonate surfactant, without dehydration before reaction, must use a large amount of alcohol and Water mixed solvent, also need to introduce a large amount of alkaline substances to activate the hydroxyl on the alkyl glycoside, produce a large amount of inorganic salts in the product inevitably like this, and do not disclose the technology that removes solvent alcohol and inorganic salts, and yield is also low lower, not more than 50%

In the method disclosed in Chinese patent 104072563A, although only water is used as a solvent, since 3-chloro-2-hydroxypropylsulfonate sodium is used as a raw material, when reacting with alkyl glycosides, still use pure alkyl glycoside quality 11.5-25.5% of 32% liquid caustic soda is used as acid agent, which inevitably produces an equimolar amount of inorganic salts in the product

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