METHOD OF PRODUCTION OF THE ALKALI-RESISTANT AND THERMAL-RESISTANT POLYOLS Russian patent published in 2007 - IPC C07C29/76 C07C29/88 C13D3/14 C07C31/26 

FIELD: chemical industry; method of production of the alkali-resistant and thermal-resistant polyols.

SUBSTANCE: the invention is pertaining to the improved method of production of the alkali- resistant and thermal-resistant polyols representing the sugar-alcohol syrups. The method provides for the following stages: hydrogenation of the hydrolysate of the corresponding polysaccharide with formation of the hydrogenated sugar-alcohol syrup, the alkaline and thermal treatment of the hydrogenated syrup for production of the stabilized sugar-alcohol syrup, refining of the stabilized sugar-alcohol syrup by its gating through, at least, one ion-exchange resin, in which the stabilized sugar-alcohol syrup is refined by means of its double gating through the cationic- anionic ion-exchange configuration (CACA) including, at least, the first weak-acid cationic ion-exchange resin and the second strongly-base, medium-base or weak-base anion-exchanging resin. The method allows to have the alkali-resistant and thermal-resistant polyols not having the shortcomings of the polyols of the previous level of the engineering.

EFFECT: the invention ensures production of the alkali-resistant and thermal-resistant polyols not having the shortcomings of the polyols of the previous level of the engineering.

18 cl, 3 ex, 1 dwg