METHODS FOR OBTAINING BIOPLASTICS AND BIOPRODUCTS FROM MANURE Russian patent published in 2021 - IPC C08B3/06 C08B16/00 D21C3/20 A01C3/00 

FIELD: biology.

SUBSTANCE: invention relates to the separation of manure into fractions and the processing of these fractions, in particular to a method for obtaining cellulose acetate from manure at atmospheric pressure and to a method for obtaining fiber from regenerated cellulose obtained from manure by separating manure into useful components. The method includes steps a) flocculation purification, with the flocculant being iron chloride FeCl₃ or aluminum sulfate Al₂(SO₄)₃, and manure filtration, in which the manure is separated into solid fractions containing lignocellulose with the help of sieves, b) cooking the solid fractions obtained from the manure containing lignocellulose at atmospheric pressure with a monocarboxylic acid carrier solution using an ozone or peroxic acid bleaching process to obtain a soluble cellulose mass, while the monocarboxylic acid is acetic acid, formic acid, propionic acid, butyric acid or a combination of both, and peroxic acid is peracetic acid, c) acetylation of the soluble cellulose mass obtained from manure with acetic anhydride and a catalyst in a monocarboxylic acid carrier solution to obtain cellulose acetate, with the catalyst being nitric acid HNO₃, sulfuric acid H₂SO₄, hydrochloric acid HCl, sodium bisulfate NaHSO₄ or a combination thereof for a method of producing cellulose acetate, or dissolving a manure-derived soluble cellulose mass with 4-methylmorpholine N-oxide to form a spinning solution and produce fiber from regenerated cellulose for a method for producing fiber, d) extraction of fermentable components from manure fractions to obtain monocarboxylic acids for use in a monocarboxylic acid carrier solution.

EFFECT: proposed is production of environmentally friendly biological products.

26 cl, 2 dwg, 12 ex