| 摘要 |
FIELD: food processing industry, in particular production of pectin substances as main product and feedstuffs as byproducts. ^ SUBSTANCE: claimed method includes raw material treatment with 1 % HCl solution at 50°C, washing with water up to pH 7, 4-step treatment with sodium hydroxide solution, filtering and extract separation. Extracts are acidified with sulfuric acid solution, washed with water and isolated zosterin is decolorized with hydrogen peroxide, filtered, and dried. Treatment with 1 % HCl solution is carried out at hydromodule of 1:10 for 30 min; grass mass is separated by filtration and subjected to four-step treatment with 1 % sodium hydroxide solution at 95-100°C, hydromodule of 1:4.2 for 30 min. Grass residue is separated from extract by filtration and used in feed product manufacturing. In the first embodiment extract is precipitated with alcohol to produce sodium zosterate, in the second one extract is precipitated with 3 % aqueous sulfuric acid solution up to pH 2.5 to produce zosterin followed by washing thereof with hot water. Obtained sodium zosterate and zosterin are decolorized with 40 % hydrogen peroxide solution at hydromodule of 1:4, temperature of 60°C for 6 h and dried at 60°C. ^ EFFECT: improved method for production of pectin substances with increased purity. ^ 1 ex |
