US PATENT SUBCLASS 423 / 220
.~ Carbon dioxide or hydrogen sulfide component

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

210  DF  MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE {11}
220.~ Carbon dioxide or hydrogen sulfide component {9}
221  DF  .~.~> Utilizing thionate or thiosulfate as reactant
222  DF  .~.~> Reacting mixture with sulfur dioxide, sulfite, or bisulfite
223  DF  .~.~> Utilizing reactant containing arsenic, phosphorus, or boron
224  DF  .~.~> By oxidizing or burning component
225  DF  .~.~> By suspension of metal oxide or hydroxide particles in liquid
226  DF  .~.~> Utilizing organic reactant {2}
230  DF  .~.~> Utilizing solid sorbent, catalyst, or reactant {1}
232  DF  .~.~> Utilizing carbonate as reactant {1}
234  DF  .~.~> Utilizing ammonium or metal hydroxide solution

DEFINITION

Classification: 423/220

(under subclass 210) Processes wherein the component is carbon dioxide (CO2) or hydrogen sulfide (H2S).

SEE OR SEARCH CLASS

95, Gas Separation: Processes, for processes of separating carbon dioxide (CO2) or hydrogen sulfide (H2S) from a gaseous fluid mixture by physical means only. See particularly

43+, for selective diffusion of gases, subclasses 90+ for solid sorption, and subclasses 149+ for liquid contacting.