US PATENT SUBCLASS 208 / 89
.~.~.~ With hydrogen

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}
89.~.~.~ With hydrogen

DEFINITION

Classification: 208/89

(under subclass 88) Processes wherein the refining treatment of the mineral oil includes the use of hydrogen, either in the free state or by means of a hydrogen rich material (hydrogen donor).

SEE OR SEARCH THIS CLASS, SUBCLASS:

58+, for plural serial stage conversion processes wherein the first stage is hydrodesulfurization under cracking conditions.

209+, for processes of removing sulfur from mineral oil wherein hydrogen is used.

264, for processes of refining employing free hydrogen.