US PATENT SUBCLASS 423 / 141
.~.~.~ Subjecting mixture to pressure, vacuum, or steam

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}
140  DF  .~.~ Forming insoluble substance in liquid {4}
141.~.~.~ Subjecting mixture to pressure, vacuum, or steam

DEFINITION

Classification: 423/141

(under subclass 140) Processes wherein a chemical reaction takes place while the pressure on the mixture is either higher or lower than atmospheric; or while steam or water vapor is brought into contact with mixture.

(1) Note. Pressure increase or decrease can be effected by any means, e.g., submerged blast of a gas into a slurry or liquid, pumping of the liquid or slurry, increase or decrease in pressure of the gas space above a liquid surface, etc.