US PATENT SUBCLASS 208 / 428
.~ Including contact with extraneous additive other than hydrogen, e.g., solvent, etc.

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

400  DF  BY TREATMENT OF SOLID MINERAL, E.G., COAL LIQUEFACTION, ETC. {13}
428.~ Including contact with extraneous additive other than hydrogen, e.g., solvent, etc. {7}
429  DF  .~.~> Distinct addition zones
430  DF  .~.~> Contact with additive, followed by chemical conversion
431  DF  .~.~> Specified hydrogen-donor solvent
432  DF  .~.~> With specified circulation procedure in contact zone
433  DF  .~.~> Simultaneous treatment with gaseous additive and liquid solvent
434  DF  .~.~> Additive is petroleum or fraction from petroleum refining
435  DF  .~.~> Additive is specified catalyst or liquid solvent or dispersant

DEFINITION

Classification: 208/428

Including contact with extraneous additive other than hydrogen, e.g. solvent, etc.:

(under subclass 400) Subject matter wherein the feed material, an intermediate material, or a product mixture is contacted with a substance, other than hydrogen, brought in from outside the process.

(1) Note. The substance may be disclosed as a catalyst, a solvent, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

415, for a process having a step of liquid recycle.