US PATENT SUBCLASS 562 / 90
.~.~.~.~ Processes of sulfonating naphthalene per se or alkyl substituted naphthalene


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



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}
45  DF  .~.~ Benzene ring bonded directly to the sulfonate sulfur (e.g., purification and neutralization of benzene sulfonic acids, etc.) {11}
89  DF  .~.~.~ Polycyclo ring system consisting of benzene rings bonded directly to the sulfonate group {1}
90.~.~.~.~ Processes of sulfonating naphthalene per se or alkyl substituted naphthalene


DEFINITION

Classification: 562/90

(under subclass 89) Processes wherein naphthalene, per se, or an alkyl substituted naphthalene, is sulfonated.