US PATENT SUBCLASS 208 / 31
.~.~.~ With solvent

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

24  DF  PARAFFIN WAX; TREATMENT OR RECOVERY {4}
28  DF  .~ Separation of paraffin from oil (e.g., dewaxing) {4}
30  DF  .~.~ Separation of residual oil from wax (i.e., deoiling) {2}
31.~.~.~ With solvent

DEFINITION

Classification: 208/31

(under subclass 30) Processes wherein the separation is facilitated by the use of a nonreactive material which exerts a solvent action upon some component of the mixture.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33+, for processes of dewaxing mineral oils by use of solvents.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation, appropriate subclass, for processes and apparatus for separating waxes from mineral oils by filtering.