US PATENT SUBCLASS 423 / 157.3
.~.~.~ Acid treatment


Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

1  DF  TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15}
155  DF  .~ Alkaline earth metal (Mg, Ca, Sr, or Ba) {11}
157.2  DF  .~.~ Phosphate rock or ore {1}
157.3.~.~.~ Acid treatment {1}
157.4  DF  .~.~.~.~> Sulfating


DEFINITION

Classification: 423/157.3

Acid treatment:

(under subclass 157.2) Processes wherein the mixture is treated with an acid.