US PATENT SUBCLASS 208 / 344
.~.~.~ Plural absorption stages

Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

308  DF  FRACTIONATION {5}
340  DF  .~ Recovery of mineral oil from natural or converted gases {1}
341  DF  .~.~ By absorption and vaporization {4}
344.~.~.~ Plural absorption stages {1}
345  DF  .~.~.~.~> At least one stage is under pressure

DEFINITION

Classification: 208/344

(under subclass 341) Processes wherein the gas-vapor mixture is subjected to a plurality of separate absorption treatments.