US PATENT SUBCLASS 558 / 131
.~.~.~ Converting a phosphorus ester group to a P-XH group, wherein H of -XH may be replaced by substituted or unsubstituted ammonium or by a Group IA or IIA light metal, and wherein X is chalogen and P may be trivalent or pentavalent

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558 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
70  DF  .~ Phosphorus esters (i.e., compounds having the phosphorus ester group, wherein trivalent or pentavalent phosphorus and carbon are bonded directly to the same divalent chalcogen, and wherein the carbon may be single bonded to any atom but may be multiple bonded only to carbon) {18}
87  DF  .~.~ Processes {19}
131.~.~.~ Converting a phosphorus ester group to a P-XH group, wherein H of -XH may be replaced by substituted or unsubstituted ammonium or by a Group IA or IIA light metal, and wherein X is chalogen and P may be trivalent or pentavalent

DEFINITION

Classification: 558/131

(under subclass 87) Processes wherein a P-XH group is formed from a phosphorus ester group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), P is trivalent or pentavalent, and H of -XH may be replaced by substituted or unsubstituted ammonium or by a Group IA or IIA light metal.