US PATENT SUBCLASS 423 / 150.3
.~.~.~ Treatment of iron containing waste mixture

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

Internet Version by PATENTEC © 1999      Terms of Use


423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

1  DF  TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15}
138  DF  .~ Iron group metal (Fe, Co, or Ni) {7}
150.1  DF  .~.~ Leaching, washing, or dissolving {3}
150.3.~.~.~ Treatment of iron containing waste mixture

DEFINITION

Classification: 423/150.3

Treatment of iron containing waste mixture:

(under subclass 150.1) Processes which include treatment of iron containing product stream that is a by-product or discarded product of another process (e.g., products of pickle liquor).

SEE OR SEARCH THIS CLASS, SUBCLASS:

531, for removal or separation of impurities present in sulfuric acid or reactants that form sulfuric acid.

SEE OR SEARCH CLASS

208, Mineral Oils: Processes and Products,

13, for treatment of mineral oil refining sludge.

216, Etching a Substrate: Processes, particularly 93, for methods of chemical etching including a step of recycling the etchant.