208 / | HD | MINERAL OILS: PROCESSES AND PRODUCTS |
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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 |