Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1972-08-03
1976-07-20
Helfin, Bernard
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260429J, 2604299, 260439R, 260473G, 260515P, 260590R, 71 1, 71 23, 210 54, C07C14352, C07C 6976
Patent
active
039706915
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 carbonylactivated halocompound per mole of monomeric unit in the polyphenol of the formula ##EQU1## or with a cyano-activated halocompound of the formula ##EQU2## wherein R' is H, HC=O, or R--c=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 watersoluble and possess chelating characteristics.
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Cotton et al., "Advanced Inorganic Chem.," 2nd Ed., p. 545, (1966).
Casebier Ronald Leroy
Sears Karl David
Chan Nicky
Helfin Bernard
International Telephone and Telegraph Corporation
Raden J. B.
Warner D. P.
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