US PATENT SUBCLASS 423 / 528-- .~.~.~.~.~ Contacting mixture with gas, steam, or vapor

US PATENT SUBCLASS 423 / 528
.~.~.~.~.~ Contacting mixture with gas, steam, or vapor

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	DF	.~.~.~.~ Starting material includes organic or carbonaceous impurity {3}
528		.~.~.~.~.~ Contacting mixture with gas, steam, or vapor

DEFINITION

Classification: 423/528

(under subclass 525) Processes including the step of bringing the mixture into contact with an external source of gas or steam.

(1) Note. This subclass provides for processes wherein gas is bubbled through or blown against the mixture. However, it does not include processes wherein mere contact with atmohpheric air is made nor wherein the only contact is with vapors rising from the mixture.

SEE OR SEARCH THIS CLASS, SUBCLASS:

526, for similar processes where the mixture is under pressure of vacuum.