US PATENT SUBCLASS 208 / 200
.~.~.~.~ With preliminary treatment of the oil

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

177  DF  REFINING {23}
189  DF  .~ Sweetening {6}
197  DF  .~.~ With lead compounds {2}
199  DF  .~.~.~ Sodium plumbite {2}
200.~.~.~.~ With preliminary treatment of the oil

DEFINITION

Classification: 208/200

(under subclass 199) Processes combined with a nonconversion treatment of the mineral oil prior to the sweetening treatment with sodium plumbite.