US PATENT SUBCLASS 208 / 208 R
.~ Sulfur removal (free or combined sulfur)

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

177  DF  REFINING {23}
208 R.~ Sulfur removal (free or combined sulfur) {17}
209  DF  .~.~> With hydrogen {4}
218  DF  .~.~> Split treatment
219  DF  .~.~> With acids {4}
226  DF  .~.~> With alkali or alkali earth metal compound (except clays) {4}
236  DF  .~.~> With nitrogen containing treating reagent
237  DF  .~.~> With organic reagent {3}
241  DF  .~.~> With free halogen or nonmetal halide containing reagent
242  DF  .~.~> With sulfur oxides
243  DF  .~.~> With Group VI metal or compound
244  DF  .~.~> With Group VIII metal or compound
245  DF  .~.~> With silicon or compound thereof
246  DF  .~.~> With Group IB metal or compound
247  DF  .~.~> With Group IIB metal or compound
248  DF  .~.~> With Group III metal or compound
249  DF  .~.~> With Group IV, V, VII metal or compound
250  DF  .~.~> Solids contacting and mixing
208 M  DF  .~.~> Using free alkali metal

Unofficial Alpha Subclasses: R M

DEFINITION

Classification: 208/208

(under subclass 177) Processes wherein mineral oil is treated to remove sulfur therefrom, whether present as free sulfur or as a compound.

(1) Note. Processes classifiable in this or indented subclass are those wherein (1) the claims specify the removal of sulfur or (2) the disclosure is limited to the removal of sulfur. See (2) Note to subclass 177.