METHOD OF SULFOALKYLATION OF LIGNOCARBOHYDRATE MATTER Russian patent published in 2003 - IPC

FIELD: chemical technology. SUBSTANCE: invention relates to preparing lignocarbohydrate sulfoalkyl esters sodium salts. Method involves interaction of preliminary activate cellulose-base material with sulfoalkylating agent in isopropyl alcohol medium and activation reaction is carried out with 28% sodium hydroxide solution at temperature 80-82 C for 1 h. Lignocarbohydrate material consisting of cellulose, lignin, hemicellulose being without its separation for components is used as a cellulose-base material. 2-(β--Chloroethoxy)-ethanesulfonate sodium is used as a reagent and reaction is carried out at isopropyl alcohol boiling point for 2 h in the mole ratio of reagents = 1:2. Invention provides utilization of all lignocarbohydrate material, realizes the possibility of wasteless technology being without separation of lignocarbohydrate material for lignin and carbohydrate moiety, decrease of the cost of the end product and improves ecology environment. The prepared sulfoalkylated lignoalkylated matters exhibit the more broad spectrum of properties that can be used for control of properties of washing out fluids in petroleum and gas holes drilling, for stabilization of cement solutions in the building industry and as chemical reagents in ore flotation in mining industry. EFFECT: improved preparing method. 3 tbl