METHOD OF PRODUCING COLD WATER SWELLING GELLED STARCH CROSS-LINKED WITH PHOSPHATE Russian patent published in 2012 - IPC C08B31/00 C08B31/06 C08J3/24 

FIELD: chemistry.

SUBSTANCE: alkaline starch is gelled in the first zone (10) of an extruder. Phosphorus oxychloride is then added as a cross-linking agent in the second zone (11) of the extruder. Cross-linking of the obtained gelled starch with phosphorus oxychloride is carried out in the second and third zones (11, 12) of the extruder. The obtained cross-linked gelled starch is neutralised the fourth zone (13) of the extruder and extracted in the fifth zone (14) of the extruder. The method enables to improve and simplify the method of producing derivatives of cold water swelling cross-linked starch.

EFFECT: derivatives of cold water swelling starch which is cross-linked with phosphorus oxychloride which are more resistant to harsh pH values, temperatures and shearing forces are obtained as a result of more homogeneous chemical modification of starch.

13 cl, 4 tbl, 5 ex, 4 dwg