US PATENT SUBCLASS 562 / 124
.~.~.~ Purification or recovery

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}
30  DF  .~ Sulfonic acids or salts thereof (i.e., compounds containing the sulfonate group, -S(=O)(=O)-O- wherein the single bonded oxygen is bonded directly to hydrogen, or to a group IA or IIA light metal or to substituted or unsubstituted ammonium) {15}
115  DF  .~.~ Processes (e.g., neutralization, stabilization, etc.) {6}
124.~.~.~ Purification or recovery

DEFINITION

Classification: 562/124

(under subclass 115) Processes wherein a sulfonic acid or a salt thereof is separated from impurities or from the reaction mixture.