METHOD OF OBTAINING HIGHLY STRONG GYPSUM BINDING AGENT Russian patent published in 2015 - IPC C04B11/00 C04B28/14 C04B24/00 

FIELD: chemistry.

SUBSTANCE: invention relates to the production of building materials and can be applied at industrial enterprises, which produce masonry and decorative building mixtures, which include gypsum binding agents. The method of a obtaining highly strong gypsum binding agent includes soaking of a gypsum raw material with a solution of maleic acid and thermal processing of the raw material under pressure, as the gypsum raw material applied is a product of processing alumina-containing wastes, which contains calcium sulphate dehydrate, with soaking and processing of the gypsum raw material being carried out simultaneously by boiling the gypsum raw material in a water solution of maleic acid with a concentration of 0.02-0.10 wt %, with a ratio of the gypsum raw material and the water solution of maleic acid equal to 1:3, the obtained pulp is cooled, and filtered, the obtained after filtration sediment is supplied to drying and following milling.

EFFECT: reduced duration of a gypsum binder obtaining process and increase of strength in its target application.

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