Production of cellulose acetate

Details Production of cellulose acetate Production of cellulose acetate

1978-03-13

1979-07-24

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 69, C08B 102, C08B 306

Patent

active

041623592

ABSTRACT:
Cellulose acetate is produced by subjecting highly purified cellulosic dissolving pulp to a bleaching sequence including at least one alkaline extraction stage and acetylating the bleached pulp to convert the pulp to cellulose acetate. The yellowness index of the cellulose acetate is reduced by carrying out the alkaline extraction stage in the presence of from 0.2 to 3.3%, based on dry pulp weight, of sodium or hydrogen peroxide.

REFERENCES:
patent: 1379699 (1921-05-01), Scheele
patent: 1749003 (1930-03-01), Schur et al.
patent: 3038894 (1962-06-01), Thomsen

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