Process for preparing water-soluble phosphonomethyl ethers of ce

Details Process for preparing water-soluble phosphonomethyl ethers of ce Process for preparing water-soluble phosphonomethyl ethers of ce

1981-10-20

1983-04-12

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

8120, 536 84, 536 88, C08B 1100, C08L 126

Patent

active

043799183

ABSTRACT:
Disclosed is a process for preparing water-soluble phosphonomethyl ethers of cellulose from cellulose and halogenomethane phosphonic acid or one of its salts or acid derivatives, in an aqueous, alkaline medium. The process is carried out in such a way that, for each mole of the cellulose, from about 2.1 to 15 moles of hydroxide ions and from about 0.4 to 3.0 moles of halogenomethane phosphonate ions as etherifying agent are caused to react in from about 3 to 50 parts by weight, per part by weight of the cellulose, of a mixture which is composed of an inert, preferably water-miscible organic solvent and water and in which the proportion of water ranges from about 2 to 60 percent by weight, the reaction is continued until the phosphonomethyl cellulose has a DS of at least about 0.13.

REFERENCES:
patent: 2979374 (1961-04-01), Drake et al.
patent: 3388118 (1968-06-01), Tesoro
patent: 3553194 (1971-01-01), Verbanac et al.
patent: 3634394 (1972-01-01), Andreassen
patent: 3652540 (1972-03-01), Determann et al.
patent: 4017671 (1977-04-01), Schminke et al.
patent: 4020271 (1977-04-01), Chatterjee
"Phosphonomethylation of Cotton" by G. L. Drake, W. A. Reeves, J. D. Guthrie, published in Textile Research Journal, Mar. 1959, pp. 270-275.
Abstract Bulletin of the Institute of Paper Chemistry, vol. 41, No. 1, Jul. 1970, abstract No. 2007(u) at p. 202 European Search Report.

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