US PATENT SUBCLASS 208 / 191
.~.~ With copper compounds

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

177  DF  REFINING {23}
189  DF  .~ Sweetening {6}
191.~.~ With copper compounds {3}
192  DF  .~.~.~> With preliminary treatment of oil
193  DF  .~.~.~> With subsequent treatment of the sweet oil {1}
195  DF  .~.~.~> Copper chloride and free oxygen containing gas

DEFINITION

Classification: 208/191

(under subclass 189) Processes wherein an added copper compound is employed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

246, for processes (nonsweetening) of removing sulfur using copper or a compound of copper.