US PATENT SUBCLASS 208 / 57
.~.~ First stage is an hydrogenation (saturation)

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

46  DF  CHEMICAL CONVERSION OF HYDROCARBONS {11}
49  DF  .~ Plural serial stages of chemical conversion {6}
57.~.~ First stage is an hydrogenation (saturation)

DEFINITION

Classification: 208/57

(under subclass 49) Processes wherein mineral oil is subjected to hydrogenation treatment which saturates at least a part of the unsaturated hydrocarbons present prior to any other conversion step, and the hydrogenated material is not employed as a source of hydrogen in a subsequent conversion step.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56, for cyclic hydrogen donor diluent processes.