METHOD FOR PREPARING SODIUM LAURYL SULFATE Russian patent published in 2006 - IPC C07C309/65 C07C309/68 C07C305/10 

FIELD: chemistry of surface-active substances, chemical technology.

SUBSTANCE: invention relates and describes a method for preparing sodium lauryl sulfate of high purity degree. Method involves the sulfatization reaction of lauryl alcohol with chlorosulfonic acid, desorption of hydrogen chloride by vacuum evaporation at temperature 35-40°C and gradual declining pressure up to 30-35 mm of mercury column for 15 min, neutralization sulfomass after vacuum evaporation with an aqueous-acetone solution of sodium hydroxide at water content 18-24% to pH = 8.5 at temperature 55-57°C followed filtering off hot aqueous-acetone solution at temperature 45-50°C, not less, and crystallization of sodium lauryl sulfate for three stages at gradual declining temperature and constant stirring, washing out sodium lauryl sulfate crystals with acetone at temperature 30-35°C. Proposed method provides preparing the end product of high purity degree with the yield 76% of stoichiometry and by simplified technology. The end product can be used for using in medicine, pharmaceutical, cosmetic and steel foundry industry and for scientific investigations.

EFFECT: improved preparing method, enhanced purity of product.

3 cl, 1 tbl, 1 ex