Process for esterification of cellulose using as the catalyst th

Details Process for esterification of cellulose using as the catalyst th Process for esterification of cellulose using as the catalyst th

1983-10-21

1984-10-30

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

252182, 536 59, 536 62, 536 63, 536 64, 536 65, 536 67, 536 68, 536 69, 536 70, 536 71, 536 73, 536 74, C08B 302

Patent

active

044800908

ABSTRACT:
The present invention relates to a method of preparing lower fatty acid esters of cellulose which comprises esterifying at a temperature of between about 75.degree. C. and about 110.degree. C. a cellulose compound having esterifiable hydroxyl groups with an esterifying bath comprising an organic acid anhydride, a diluent, and a catalyst comprising from 0.2 to 2.0 parts phosphoric acid, from 0.1 to 1.2 parts sulfuric acid, and from 0.05 to 0.6 parts of a hindered aliphatic alcohol by weight per 100 parts of the cellulose to be esterified.

REFERENCES:
patent: 1683347 (1928-09-01), Gray et al.
patent: 2193033 (1940-03-01), Malm et al.
patent: 2254652 (1941-09-01), Hiatt et al.
patent: 2353255 (1944-07-01), Malm et al.
patent: 2759924 (1956-08-01), Touey
patent: 2861069 (1958-11-01), Touey et al.
patent: 4306060 (1981-12-01), Ikemoto

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