METHOD OF PRODUCING PECTIN FROM SEAWEED Russian patent published in 2012 - IPC A23L1/524 

FIELD: chemistry.

SUBSTANCE: invention relates to food industry. The method involves preparing raw material, hydrolysis of the prepared plant material with acid solution at pH 3-5 and temperature 50-60°C for not more than 4 hours and separation of the hydrolysate. The hydrolysed plant material is then washed with water and pectin is then extracted therefrom in an extractor with a false bottom in extraction agent circulation conditions in two steps. First, pectin is extracted from the material with 0.5% ammonium oxalate solution while heating at temperature 45-50°C and pressure 1.5-2.5 atm for not more than 40 min, and then with 1.5% ammonium oxalate solution while heating at temperature 75-80°C and pressure 3-4 atm for not more than 5 min. Further, the extract undergoes ultrafiltration purification and concentration. Pectin is then precipitated from the extract with ethyl alcohol containing sodium chloride and then dried. In one version, the pectin precipitate is further washed with 80% ethyl alcohol before drying.

EFFECT: invention significantly cuts duration of the process of obtaining pectin and lowers the cost of the obtained product by cutting power consumption and optimising the amount of reagents used, particularly by cutting the amount of ethyl alcohol used to precipitate pectin three-fold.

7 cl, 2 ex