Catalytic system for cellulose acylation, process for producing

Details Catalytic system for cellulose acylation, process for producing Catalytic system for cellulose acylation, process for producing

1996-05-28

1999-09-14

Mullis, Jeffrey C.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

502170, B01J 302, B01J 304

Patent

active

059522607

ABSTRACT:
A catalytic system for cellulose acylation includes an adduct of sulfuric acid with N,N-dimethylacetamide, a lower fatty acid having from two to four carbon atoms, and free sulfuric acid or free N,N-dimethyl-acetamide. A mole ratio of the system components per mole of the adduct is presented. The catalytic system also includes an adduct of perchloric acid with N,N-dimethylacetamide for use in cellulose reactions with propionic or butyric anhydride. Method for preparing the catalytic system includes the use of hydrous sulfuric acid or sulfuric and perchloric acids, and N,N-dimethylacetamide and include reacting hydrous sulfuric acid or sulfuric and perchloric acids with N,N-dimethylacetamide in the presence of a lower fatty acid anhydride in an amount of 1 mole per mole of water contained in the reactants in the absence of cellulose at a temperature of from 0.degree. C. to 25.degree. C. Mole ratios of the reactants for preparing the catalytic system per mole of sulfuric acid are presented.

REFERENCES:
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patent: 2536634 (1951-01-01), Fraizy
patent: 2705710 (1955-04-01), Blume
patent: 2976277 (1961-03-01), Touey
patent: 4366232 (1982-12-01), Buser et al.
Chemical Abstracts, V. 52, No. 14, Jul. 25, 1958, p. 14169a.
Aldrich Catalog, product literature of Aldrich Chemical Co., pp. 2-3; 482-483, 1992.

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