Etherification of bark extracts

Details Etherification of bark extracts Etherification of bark extracts

1976-04-05

1977-12-20

Chan, Nicky

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260465F, 560 14, C07C14344

Patent

active

040641660

ABSTRACT:
A derivative of coniferous tree barks is produced by reacting at elevated temperatures an alkaline polyphenolic solution of a coniferous bark extract in the proportion of from 0.1, and preferably from 0.5 to 8.0 moles of a carbonyl-activated halocompound per mole of monomeric unit in the polyphenol of the formula ##STR1## or with a cyano-activated halocompound of the formula ##STR2## wherein R' is H, HC.dbd.O or R--C .dbd.O where R is alkyl or aryl; X is halogen and R" is alkyl, OH, oxyalkyl, aryl or OM in which M is a metal. The starting materials are the alkaline extracts resulting from the digestion of coniferous tree barks with an alkaline aqueous solution or preferably the sulfonated acid extracts of such barks. The reaction products are etherified polyphenolic compounds which are water-soluble and possess chelating characteristics.

REFERENCES:
patent: 2399434 (1946-04-01), Graenacher et al.
patent: 2831022 (1958-04-01), Blaricom et al.
patent: 2975126 (1961-03-01), Blaricom et al.
patent: 2999108 (1961-09-01), Gray et al.
patent: 3062783 (1962-11-01), Gray et al.
patent: 3335167 (1967-08-01), Masson
patent: 3658829 (1972-04-01), Nakamura et al.
patent: 3966708 (1976-06-01), Casebier et al.

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