US PATENT SUBCLASS 562 / 481
.~.~.~.~ Prepared by disproportionation

Current as of: June, 1999
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562 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {41}
400  DF  .~ Carboxylic acids and salts thereof {14}
405  DF  .~.~ Aromatic {13}
480  DF  .~.~.~ Polycarboxylic acids or salts thereof {7}
481.~.~.~.~ Prepared by disproportionation

DEFINITION

Classification: 562/481

Prepared by disproportionation:

(under subclass 480) Processes wherein the alkali metal salt of an aromatic carboxylic acid is reacted under conditions wherein one molecule is decarboxylated and another molecule carboxylated. For example, in the Henkel Reaction sodium benzoate will produce benzene and phthalic acid.