US PATENT SUBCLASS 423 / 222
.~.~ Reacting mixture with sulfur dioxide, sulfite, or bisulfite

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

210  DF  MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE {11}
220  DF  .~ Carbon dioxide or hydrogen sulfide component {9}
222.~.~ Reacting mixture with sulfur dioxide, sulfite, or bisulfite

DEFINITION

Classification: 423/222

(under subclass 220) Processes in which the material used to treat the gaseous mixture comprises sulfur dioxide or a solution thereof or a sulfite (SO3[supscrpt]2-[end supscrpt]) or bisulfite (HSO3-) compound.

SEE OR SEARCH THIS CLASS, SUBCLASS:

574+, for processes including the step of reacting hydrogen sulfide with sulfur dioxide.