US PATENT SUBCLASS 202 / 174-- .~.~.~.~.~.~ Multiple effect

US PATENT SUBCLASS 202 / 174
.~.~.~.~.~.~ Multiple effect

Current as of: June, 1999
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202 /	HD	DISTILLATION: APPARATUS

81	DF	APPARATUS {4}
82	DF	.~ Systems {6}
152	DF	.~.~ Separatory {3}
163	DF	.~.~.~ Still {13}
172	DF	.~.~.~.~ Plural {1}
173	DF	.~.~.~.~.~ Series {1}
174		.~.~.~.~.~.~ Multiple effect

DEFINITION

Classification: 202/174

The vapor from one still is carried through the distilland of another in heat-interchange relation, but not in direct contact.

SEE OR SEARCH CLASS

159, Concentrating Evaporators,

17.1+,.

201, Distillation: Processes Thermolytic,

14+, for a process directed to using a conversion product as an indirect source of heat to heat the carbonaceous material.

203, Distillation: Processes, Separatory,

25+, for a process in which the distillation zone is indirectly heated by recovered waste heat.