US PATENT SUBCLASS 208 / 280
.~.~ Halogen containing acid

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

177  DF  REFINING {23}
265  DF  .~ With acids {4}
280.~.~ Halogen containing acid {1}
281  DF  .~.~.~> Hydrochloric acid

DEFINITION

Classification: 208/280

(under subclass 265) Processes wherein a halogen containing acid is employed.

(1) Note. This subclass contains, for example, processes of refining mineral oils with hydrofluoric acid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

241, for processes of desulfurizing mineral oils wherein nonmetal halide treating agents are used.