US PATENT SUBCLASS 208 / 206
.~.~.~ With added nitrogen containing compound

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

177  DF  REFINING {23}
189  DF  .~ Sweetening {6}
203  DF  .~.~ With alkali metal hydroxide or carbonate {2}
206.~.~.~ With added nitrogen containing compound

DEFINITION

Classification: 208/206

(under subclass 203) Processes wherein an added nitrogen containing compound is employed in addition to the alkali metal hydroxide or carbonate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

205, for sweetening processes using alkanol amines in combination with alkali metal hydroxides and carbonates.

207, for sweetening processes using nitrogen containing treating agents.