US PATENT SUBCLASS 562 / 423
.~.~.~ Preparation by carbonation

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}
423.~.~.~ Preparation by carbonation {1}
424  DF  .~.~.~.~> Of alkali metal phenolates {1}

DEFINITION

Classification: 562/423

Preparation by carbonation:

(under subclass 405) Processes wherein an aromatic carboxylic acid is produced by reacting an aromatic compound with carbon dioxide or a material which will produce carbon dioxide under the reaction conditions, such as a carbonate.