METHOD FOR PREPARING PECTIN Russian patent published in 2008 - IPC C08B37/06 

FIELD: technology of natural substances.

SUBSTANCE: invention relates to a method for isolating pectin from vegetable raw used for production of products of prophylactic and curative designation. Invention describes a method for preparing pectin. Method involves treatment of preliminary milled vegetable raw, for example, dried sunflower heads with a mixture of chloroform and ethanol followed by extraction in water bath at 70-80°C for 30-40 min, filtration and separation of the first extract. Filtered off vegetable raw is poured with distilled water at temperature 60-70°C and extracted in water bath at temperature 90-95°C for 1 h followed by filtration and separation of the second extract. Filtered off vegetable raw is poured with 0.3-0.5% ammonium oxalate solution, extracted in water bath at temperature 75-80°C for 30-40 min, filtered and the third extract is separated. Filtered off vegetable raw is poured with a 0.4-0.5% hydrochloric acid solution, heated at temperature 75-80°C for 1 h followed by filtration and separation of the fourth extract that is mixed with prepared first, second and third extracts. Prepared solution is neutralized with ammonium hydroxide to pH 7 and precipitated with 96% ethyl alcohol, precipitate is squeezed our and dried at temperature 4-6°C. Proposed method provides increasing yield of pectin and its solubility.

EFFECT: improved preparing method.

2 cl, 1 ex