US PATENT SUBCLASS 554 / 99
.~.~.~.~.~ Processes of sulfonating in the presence of lower carboxylic acid, anhydride, acid halide, or phosphorus containing material

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ Fatty compounds having an acid moiety which contains the carbonyl of a carboxylic acid, salt, ester, or amide group bonded directly to one end of an acyclic chain of at least seven (7) uninterrupted carbons, wherein any additional carbonyl in the acid moiety is (1) part of an aldehyde or ketone group, (2) bonded directly to a noncarbon atom which is between the additional carbonyl and the chain, or (3) attached indirectly to the chain via ionic bonding {23}
85  DF  .~.~ Sulfur containing {4}
88  DF  .~.~.~ Sulfoxy containing (e.g., sulfones, etc.) {5}
96  DF  .~.~.~.~ Carbon bonded directly to -S(=O)(=O)OH or to -O-S(=O)(=O)OH, wherein H may be replaced by a cation or by an ester forming group (e.g., sulfonic acid sulfate monoester, etc.) {4}
99.~.~.~.~.~ Processes of sulfonating in the presence of lower carboxylic acid, anhydride, acid halide, or phosphorus containing material

DEFINITION

Classification: 554/99

(under subclass 96) Processes wherein the compound is prepared by a sulfonation reaction which is carried out in the presence of (1) a lower carboxylic acid (i.e., the uninterrupted carbon chain in the acid moiety contains fewer than seven carbons), (2) an anhydride thereof, (3) an acid halide thereof, or (4) a phosphorus containing material.