US PATENT SUBCLASS 423 / 155
.~ Alkaline earth metal (Mg, Ca, Sr, or Ba)

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.~ Alkaline earth metal (Mg, Ca, Sr, or Ba) {11}
156  DF  .~.~> Magnetic separating
157  DF  .~.~> Ion exchanging or liquid-liquid extracting
157.2  DF  .~.~> Phosphate rock or ore {1}
157.5  DF  .~.~> Phosphorous or phosphorous compound containing waste as feed
158  DF  .~.~> Forming insoluble substance in liquid {8}
167.1  DF  .~.~> Treating asbestos
168  DF  .~.~> Mixing fuel with starting mixture
169  DF  .~.~> Separating magnesium and calcium from each other (e.g., treating dolomite, etc.)
170  DF  .~.~> Treating impure sulfate (e.g., barite, etc.) {1}
173  DF  .~.~> Treating impure carbonate (e.g., oyster shells, etc.) {2}
178  DF  .~.~> Mixture contains halogen or sulfur

DEFINITION

Classification: 423/155

(under subclass 1) Processes wherein the compound comprises one of the metals belonging to the group known as the alkaline earth metals, i.e., magnesium, calcium, strontium or barium, or the Group 11A metals of the periodic system except for beryllium and radium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2+, for a process of obtaining a radium compound from a mixture.

111+, for a process of obtaining a beryllium compound from a mixture.

SEE OR SEARCH CLASS

588, Hazardous or Toxic Waste Destruction or Containment, appropriate subclasses for the destruction or containment of hazardous or toxic waste containing Mg, Ca, Sr, or Ba.