POLYSACCHARIDE DERIVATIVES PROCESSED BY GLYOXAL AND METHOD OF NON-BOUND GLYOXAL CONTENT REDUCTION IN POLYSACCHARIDE DERIVATIVES PROCESSED BY GLYOXAL Russian patent published in 2009 - IPC C08B11/00 C08B15/02 C08B11/02 

FIELD: chemistry.

SUBSTANCE: to reduce non-bound glyoxal content cellulose ethers processed by glyoxal are processed by water solution of one or more water-soluble aluminium salts or one or more water-soluble borates, or combination of one or more water-soluble aluminium salts and one or more water-soluble borates, and, if adjustment of pH factor is required, with relevant buffer substances added, and is dried. Invention also claims method of non-bound glyoxal content reduction in cellulose ethers processed by glyoxal by mixing cellulose ether at temperature between 20°C and 70°C with water solution of one or more water-soluble aluminium salts or one or more water-soluble borates, or combination of one or more water-soluble aluminium salts and one or more water-soluble borates. For pH factor adjustment, the solution can also include buffer substances, and is further dried.

EFFECT: reduced non-bound glyoxal content in ethers of cellulose processed by glyoxal.

9 cl, 6 ex