US PATENT SUBCLASS 208 / 30
.~.~ Separation of residual oil from wax (i.e., deoiling)

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.~.~ Separation of residual oil from wax (i.e., deoiling) {2}
31  DF  .~.~.~> With solvent
32  DF  .~.~.~> Sweating

DEFINITION

Classification: 208/30

(under subclass 28) Processes for the separation of residual oil from paraffin wax.

(1) Note. Treatments included in this and indented subclasses are those in which the material treated is primarily paraffin wax which includes a relatively small amount of oil, usually occluded or dissolved therein, and the treatments are for the purpose of purifying the paraffin wax by the removal of this residual oil.

(2) Note. Processes of separating paraffin wax from a mineral oil (dewaxing) which include a broadly recited step of washing the wax to remove residual oil are classified on the basis of the dewaxing operation.