METHOD OF PREPARING PECTIN FROM VEGETABLE RAW MATERIAL Russian patent published in 1997 - IPC

FIELD: food industry, more particularly technology of recovery of pectin from vegetable raw material. SUBSTANCE: wax bast (stems) is wetted with hot water at boiling temperature for 30 minutes at hydromodulus of 1:10, and raw material is simultaneously washed. After being wetted, raw material is treated with 0.3 % oxalic acid solution at hydromodulus of 1:8 and temperature of 70-75 for 65 minutes (1st extraction stage and then with 0.2 % oxalic acid solution at hydromodulus of 1:5 and temperature of 70-75 C for 40-45 minutes. The resulting hydrolyzates are combined and pectin is deposited with 96 % thereof containing 0.2 % hydrochloric acid. Pectin is finally dehydrate with 96 % ethanol containing 0.3 % ammonium hydroxide. Drying process is carried out at 40- 45 C under vacuum. EFFECT: more efficient preparation method. 2 tbl