US PATENT SUBCLASS 423 / 525
.~.~.~.~ Starting material includes organic or carbonaceous impurity

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

511  DF  SULFUR OR COMPOUND THEREOF {4}
512.1  DF  .~ Oxygen containing {11}
521  DF  .~.~ Ternary compound containing hydrogen {1}
522  DF  .~.~.~ Sulfuric acid {5}
525.~.~.~.~ Starting material includes organic or carbonaceous impurity {3}
526  DF  .~.~.~.~.~> Utilizing pressure or vacuum on mixture
527  DF  .~.~.~.~.~> Adding organic compound to mixture
528  DF  .~.~.~.~.~> Contacting mixture with gas, steam, or vapor

DEFINITION

Classification: 423/525

(under subclass 522) Processes wherein at least one of the starting materials is a mixture having an organic or carbonaceous impurity therein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

531, for a process of purifying sulfuric acid of an impurity which is not an organic material or carbonaceous in nature; see (1) Note in subclass 226 for structural requirements of an organic substance.