Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1973-01-19
1978-01-03
Killos, Paul J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C 5916
Patent
active
040666883
ABSTRACT:
It is disclosed that citric acid and salts thereof are readily produced by reacting acetone dicarboxyl ions, cyanide ions and alkali metal ions to produce an intermediate system which is subsequently reacted in an excess caustic system to form a salt of citric acid and that the salt is readily recovered by precipitation from the excess caustic system under proper conditions of concentration and temperature without requiring the formation of calcium salts. The recovered salt may be used directly or may be subjected to additional purification or may be converted to citric acid or other salts thereof by treatment with an acidification system such as sulfuric acid.
REFERENCES:
patent: 3318944 (1967-05-01), Wiley
patent: 3798266 (1974-03-01), Bottaccio et al.
Lawrence, Jr. Walter W.
McKay Tom W.
Wiegand Karl E.
Ethyl Corporation
Johnson Donald L.
Killos Paul J.
McAnelly Shelton B.
Sieberth John F.
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