Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Treating electrode – diaphram – or membrane during synthesis
Reexamination Certificate
2008-05-09
2011-10-18
Bell, Bruce (Department: 1759)
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Treating electrode, diaphram, or membrane during synthesis
C204S263000, C204S232000, C204S252000, C427S243000, C427S245000
Reexamination Certificate
active
08038865
ABSTRACT:
Describes a diaphragm for an electrolytic diaphragm cell, e.g., a chlor-alkali cell, in which the diaphragm comprises fibrous material substantially resistant to the environment within the electrolytic cell and spheroidal ceramic microspheres at least partially resistant to the environment within the electrolytic cell associated with said diaphragm. Also describes a diaphragm for an electrolytic cell in which the diaphragm comprises a base mat of fibrous material chosen from asbestos fibers, resin-modified asbestos fibers, synthetic fibers, or mixtures of such fibers on which base mat is applied a coating comprising spheroidal ceramic microspheres. Further describes a synthetic diaphragm for an electrolytic cell, e.g., a chlor-alkali cell, on which is applied a coating comprising substantially water-insoluble inorganic particulate material, e.g., clay material, and spheroidal ceramic microspheres. Still further describes adding a dopant composition comprising spheroidal ceramic microspheres to the anolyte compartment of an electrolytic cell, e.g., a chlor-alkali cell, while the cell is operating.
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Bell Bruce
Pingitore Linda
PPG Industries Ohio Inc.
Stein Irwin M.
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