US PATENT SUBCLASS 562 / 121
.~.~.~.~ Utilizing sulfur dioxide and oxygen (i.e., sulfoxidation)

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}
120  DF  .~.~.~ Formation of sulfonic acids or sulfonic acid salts utilizing inorganic sulfonating agents (e.g., reaction of alcohols or alkyl halides with sulfurous acid, etc.) {3}
121.~.~.~.~ Utilizing sulfur dioxide and oxygen (i.e., sulfoxidation)

DEFINITION

Classification: 562/121

(under subclass 120) Processes wherein oxygen and sulfur dioxide are utilized.

(1) Note. An example of a process provided for herein is the reaction of an alkane with oxygen and sulfur dioxide to form alkane sulfonic acid.