US PATENT SUBCLASS 208 / 339
.~.~ Liquid-liquid contacting


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

308  DF  FRACTIONATION {5}
311  DF  .~ Liquid extraction with solvents {11}
339.~.~ Liquid-liquid contacting


DEFINITION

Classification: 208/339

(under subclass 311) Processes directed to the particular procedure for contacting a mineral oil with liquid solvent.

(1) Note. This subclass is the collecting place for manipulative techniques for solvent fractionation of mineral oils. Processes involving some manipulative technique and limited to the use of a solvent provided for above are cross-referenced to this subclass if necessary.

SEE OR SEARCH THIS CLASS, SUBCLASS:

298, for processes of refining mineral oil involving some

particular liquid to liquid contacting procedure.