US PATENT SUBCLASS 210 / 667
.~.~.~.~ Utilizing aluminum, calcium, or iron containing agent

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
660  DF  .~ Ion exchange or selective sorption {8}
663  DF  .~.~ Including diverse separating or treating of liquid {4}
665  DF  .~.~.~ By making an insoluble substance or accreting suspended constituents {2}
667.~.~.~.~ Utilizing aluminum, calcium, or iron containing agent

DEFINITION

Classification: 210/667

Utilizing aluminum, calcium, or iron containing agent:

(under subclass 665) Process in which an element of atomic number 13, 20, or 26 or an inorganic compound of such an element is added to the liquid to cause precipitation or accretion of a dissolved or suspended material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

666, for a similar process using an organic compound of aluminum, calcium, or iron.