US PATENT SUBCLASS 208 / 308
FRACTIONATION

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

308FRACTIONATION {5}
309  DF  .~> Deasphalting
310 R  DF  .~> Adsorption {1}
311  DF  .~> Liquid extraction with solvents {11}
340  DF  .~> Recovery of mineral oil from natural or converted gases {1}
347  DF  .~> Distillation {12}

DEFINITION

Classification: 208/308

(under the class definition) Processes for the separation of mineral oils into hydrocarbon fractions at least one of which is a mineral oil.

(1) Note. This subclass contains, for example, the separation of mineral oil components by physical processes or

by treatment with emulsifying agents.

SEE OR SEARCH THIS CLASS, SUBCLASS:

177+, for processes of removing nonhydrocarbon impurities, gums or gum forming hydrocarbons from mineral oils.

SEE OR SEARCH CLASS

588, Hazardous or Toxic Waste Destruction or Containment, appropriate subclasses for the destruction or containment of hazardous or toxic waste in the form of fractionated hydrocarbons.