US PATENT SUBCLASS 95 / 90
SOLID SORPTION

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


95 /   HD   GAS SEPARATION: PROCESSES

90SOLID SORPTION {8}
91  DF  .~> Soluble or deliquescent material used
92  DF  .~> And liquid contact (e.g., scrubbing, sorption, etc.) {2}
95  DF  .~> Including reduction of pressure {3}
107  DF  .~> Moving sorbent {3}
114  DF  .~> With plural indirect heat transfer steps on solid sorbent or gaseous fluid mixture or constituent thereof {1}
116  DF  .~> Inorganic gas or liquid particle sorbed (e.g., vapor, mist, etc.) {10}
141  DF  .~> Organic gas or liquid particle sorbed (e.g., vapor, mist, etc.) {2}
148  DF  .~> And regeneration

DEFINITION

Classification: 95/90

SOLID SORPTION:

(under the class definition) Process in which a solid sorbent is used to retain on its internal or external surfaces a constituent of the fluid mixture passing in contact therewith.

(1) Note. A solid sorbent is a solid material which separates a constituent (e.g., a gas, vapor, etc.) from a fluid mixture containing such constituents in a "quasi-chemical" manner. The action in most instances is that of selective retention (i.e., the sorbent removes only the part of the fluid mixture for which it has the greatest affinity). The retained constituent cannot be removed by shaking, brushing, or similar mechanical action, but generally can be removed by heating, pressure reduction, or use of a stripping or denuding fluid. A filter (particulate solids or other) has no particular "chemical" affinity for a constituent of a fluid mixture. The separation in the case of a filter depends on a mechanical entrapment of solid or liquid particles because of their relatively large size compared with the interstices or spaces between individual elements of the filter. The retained particles can be removed by brushing, wiping, shaking, or similar mechanical action.

(2) Note. "Absorption" is the holding of a constituent by cohesion or capillary action in the pores of a solid. "Adsorption" is the ability of a sorbent to hold or concentrate gases, liquids, or dissolved substances upon its surface.

(3) Note. The desorption of a solid sorbent, which may appear in one of the subclasses below, must be before or after its use as a sorbent, as claimed. The mere treatment of a solid sorbent to drive off the fluid sorbed thereon or therein is proper subject matter for Class 502. See search class note below.

(4) Note. This subclass and the subclasses indented hereunder will take the degasification of a liquid by use of a solid sorbent.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41, for processes using compressing and cooling of a fluid mixture to separate a constituent from the mixture in addition to using a solid sorbent to separate a constituent from the gas. SEE OR SEARCH CLASS

96, Gas Separation: Apparatus,

108+, for apparatus containing solid sorbents.

203, Distillation: Processes, Separatory,

41, for a separatory distillation process including the step of passing the produced vapor through a solid sorbent.

210, Liquid Purification or Separation,

660+, for processes of using a solid sorbent to purify or separate a liquid.

420, Alloys or Metallic Compositions,

900, for hydrogen (H2) storage alloys or metallic compositions.

423, Chemistry of Inorganic Compounds,

658.2, for processes of producing elemental hydrogen (H) by direct decomposition of a binary compound (e.g., chemical storage, etc.).

436, Chemistry: Analytical and Immunological Testing, 167, for processes wherein the basis for analysis is an optical result of a chemical reaction that is measured mechanically or visually, including solid sorption of a gas.

502, Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making,

20+, for regenerating or rehabilitating solid sorbent compositions, per se, subclasses 60+ for zeolite compositions and for processes of making zeolite compositions, and

subclasses 400+ for other solid sorbent compositions and for processes of making solid sorbent compositions. Class 95 will take the combination of gas separation using a solid sorbent composition and regenerating or rehabilitating the solid sorbent composition.

585, Chemistry of Hydrocarbon Compounds,

820+, for processes in which a mixture of a hydrocarbon compound with another substance is treated to recover that same compound in a more usable condition, that is, a purer or more desirable condition, by a treatment which comprises separating the hydrocarbon from the other substance by contact with a solid sorbent.