US PATENT SUBCLASS 208 / 87
.~.~ Solvent extraction

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

46  DF  CHEMICAL CONVERSION OF HYDROCARBONS {11}
85  DF  .~ With preliminary treatment of feed {4}
87.~.~ Solvent extraction

DEFINITION

Classification: 208/87

(under subclass 85) Processes wherein the preliminary treatment is a treatment of the mineral oil feed with a solvent which separates therefrom some component of the mineral oil which may be nonmineral oil component or a mineral oil fraction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

311+, for mineral oil fractionation involving the use of solvent extraction.