US PATENT SUBCLASS 208 / 28
.~ Separation of paraffin from oil (e.g., 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.~ Separation of paraffin from oil (e.g., dewaxing) {4}
29  DF  .~.~> Emulsion dewaxing
30  DF  .~.~> Separation of residual oil from wax (i.e., deoiling) {2}
33  DF  .~.~> Solvent dewaxing {3}
37  DF  .~.~> Chilling {1}

DEFINITION

Classification: 208/28

(under subclass 24) Processes for the separation of paraffin wax from another mineral oil associated therewith.

(1) Note. The separation may be by mechanical means or by the addition of solvents or other materials to the mixture and the oil may be recovered separately.

(2) Note. Processes for the removal of paraffin wax from a liquid mineral oil is generally known as "dewaxing" (of the mineral oil) and the separation of the residual oil associated with a solid paraffin wax is generally known as "deoiling".

SEE OR SEARCH CLASS

62, Refrigeration, appropriate subclasses, for refrigerating processes and apparatus.

100, Presses, appropriate subclasses for presses not provided for elsewhere, particularly 104+, for presses having a drain duct or channel for liquid expressed from the material pressed.

196, Mineral Oils: Apparatus,

14.5, for dewaxing apparatus.

210, Liquid Purification or Separation, appropriate subclasses, especially

175+, 737, 766, and 774+ for liquid separating processes and apparatus involving the use of heaters or coolers.

494, Imperforate Bowl: Centrifugal Separators, appropriate subclasses, for a separator of that class, as explained in the references thereto appearing in Sections 3 and 5 of the definition of this class (208).