FIELD: food industry.
SUBSTANCE: present invention can be used for producing a natural chitosan biopolymer from waste generated by industrial processing of shellfish. Shell-containing raw material of shellfish is preliminarily mixed with water in the ratio of 1:15 and milled with simultaneous deproteinization by electrohydraulic shocks created by ultra-long discharges. Demineralisation of the precipitate is performed with a hydrochloric acid solution with the volume ratio of 2-4 % at the water duty of 1:10 and the temperature of 20-25 °C and continuous mixing for two hours. Precipitate is separated from the supernatant, washed to pH 7.0, then the obtained chitin is soaked in the sodium hydroxide solution with the weight ratio of 35-45 % for 1-2 hours at 95-98 °C.
EFFECT: invention ensures a shorter process of chitosan production.
1 cl, 1 dwg, 1 tbl, 2 ex
| Title | Year | Author | Number |
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