US PATENT SUBCLASS 205 / 517
.~.~.~.~.~.~ Utilizing structurally defined diaphragm or membrane or diaphragm or membrane other than nonstructurally defined single layer cation exchange membrane having single-type cation exchange groups (e.g., anion exchange membrane, etc.)

Current as of: June, 1999
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205 /   HD   ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS

334  DF  ELECTROLYTIC SYNTHESIS (PROCESS, COMPOSITION, AND METHOD OF PREPARING COMPOSITION) {21}
464  DF  .~ Preparing inorganic compound {9}
477  DF  .~.~ Metal containing compound produced {11}
508  DF  .~.~.~ Hydroxide {2}
510  DF  .~.~.~.~ Alkali metal containing {3}
516  DF  .~.~.~.~.~ And elemental halogen produced {4}
517.~.~.~.~.~.~ Utilizing structurally defined diaphragm or membrane or diaphragm or membrane other than nonstructurally defined single layer cation exchange membrane having single-type cation exchange groups (e.g., anion exchange membrane, etc.) {7}
518  DF  .~.~.~.~.~.~.~> Asbestos containing {1}
520  DF  .~.~.~.~.~.~.~> Membrane having two or more different ion exchange groups in a single layer
521  DF  .~.~.~.~.~.~.~> Multilayered membrane
522  DF  .~.~.~.~.~.~.~> Roughened membrane
523  DF  .~.~.~.~.~.~.~> Diaphragm or membrane having a specified porosity
524  DF  .~.~.~.~.~.~.~> Diaphragm or membrane having nonelectrode layer bonded thereto or embedded therein
525  DF  .~.~.~.~.~.~.~> Electrode bonded diaphragm or membrane

DEFINITION

Classification: 205/517

Utilizing structurally defined diaphragm or membrane or diaphragm or membrane other than nonstructurally defined single layer cation exchange membrane having single-type cation exchange groups (e.g., anion exchange membrane, etc.):

(under subclass 516) Subject matter wherein a diaphragm or membrane having a specified composition or configuration other than a nonstructurally defined single layer cation exchange membrane having single-type cation exchange groups is utilized during synthesis.

(1) Note. Anion exchange groups include, for example, quaternary ammonium groups, quaternary pyridinium groups, sulfonium bases, primary, secondary and tertiary amino groups, pyridine groups, imino groups, etc.

SEE OR SEARCH CLASS

95, Gas Separation: Processes,

45+, for selective diffusion of gases through a substantially solid barrier using a solid electrolyte membrane (SEM) which functions without electrodes and without externally applied voltage. These membranes are used where the partial pressure of the gas to be diffused through the membrane on the permeate side is lower than that on the feed side. Electrodeless solid electrolyte membrane cells are operated by maintaining a pressure on the feed side such that a positive driving force for ion transport can be achieved in the absence of an externally applied voltage and power source. Class 204 takes the use of a SEM situated between two electrodes positioned to apply external voltage across the membrane. These are used where the partial pressure of the gas is to be diffused through the permeate side. Molecules on the feed electrochemically dissociated into ions are transported across the matrix of the membrane by the applied voltage and recombined to form molecules on the anode.

204, Chemistry: Electrical and Wave Energy,

295, and 296 for a specified membrane or diaphragm composition.