Method for conditioning carboxylate/sulfonate composite membranes for producing KOH

Patent · Tue Feb 28 04:00:00 EST 1984

OSTI ID:6889714

Kelly, P P; Justice, D D

A procedure is described for conditioning new composite laminated membranes in chlor-alkali cells producing KOH, said membrane being comprised of a laminated composite made from individual perfluorosulfonyl and perfluorocarboxylic acid layers, so that said membrane will not delaminate during startup operation of the cell. The procedure comprises charging the cathode compartment of the cell with a KOH solution of less than about 27 percent by weight KOH before startup and gradually raising the KOH concentration during the first 12 to about 20 hours of operation to about 30 percent after which the cell can be operated at higher KOH concentrations which provide better current efficiencies.

• Assignee: Olin Corporation
• Patent Number(s): US 4434041
• OSTI ID: 6889714
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ALKALI METAL COMPOUNDS
CHEMICAL PREPARATION
CHLORINE
DESIGN
EFFICIENCY
ELECTROCHEMICAL CELLS
ELECTROLYSIS
ELEMENTS
ENERGY EFFICIENCY
HALOGENS
HYDROGEN COMPOUNDS
HYDROXIDES
LYSIS
MEMBRANES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
POLYMERS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
PRODUCTION
SYNTHESIS