US PATENT SUBCLASS 208 / 323
.~.~.~ With added solvent or solvent modifier


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

308  DF  FRACTIONATION {5}
311  DF  .~ Liquid extraction with solvents {11}
322  DF  .~.~ Organic solvent containing {8}
323.~.~.~ With added solvent or solvent modifier {1}
324  DF  .~.~.~.~> Inorganic


DEFINITION

Classification: 208/323

(under subclass 322) Processes in which (1) the solvent initially comprises a mixture of compound at least one of which is organic, or (2) a plurality of solvents is added sequentially without any intervening separation of the phases.

(1) Note. The added component may be an additive which increases or decreases the solvent power of the primary solvent and may be added to effect phase separation.