US PATENT SUBCLASS 208 / 33
.~.~ Solvent dewaxing

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}
33.~.~ Solvent dewaxing {3}
34  DF  .~.~.~> With deasphalting treatment
35  DF  .~.~.~> With chilling by evaporation of solvent
36  DF  .~.~.~> With nondewaxing solvent extraction of oil

DEFINITION

Classification: 208/33

(under subclass 28) Processes wherein paraffin wax is separated or recovered by the use of a nonreactive material which exerts a solvent action upon some component of the mixture.

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31, for deoiling processes wherein inert solvents are used.

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196, Mineral Oils: Apparatus,

14.5, for dewaxing apparatus and subclass 14.52 for other solvent extraction apparatus disclosed for use on mineral oils.