US PATENT SUBCLASS 208 / 91
.~.~.~ With solid absorbents

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

46  DF  CHEMICAL CONVERSION OF HYDROCARBONS {11}
85  DF  .~ With preliminary treatment of feed {4}
88  DF  .~.~ Refining {3}
91.~.~.~ With solid absorbents

DEFINITION

Classification: 208/91

(under subclass 88) Processes wherein the refining treatment includes a treatment of the mineral oil with solid adsorbents.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213+, and 299+, for refining processes, per se, wherein solid adsorbents are used to refine the oil.