Edward G Cook

US Patent:

39545792, May 4, 1976

Filed:

Nov 1, 1973

Appl. No.:

5/411618

Inventors:

Edward Cook - Lewiston NY
Alvin T. Emery - Youngstown NY

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C25B 116
C25B 126

US Classification:

204 98

Abstract:

Hydroxides, such as alkali metal hydroxides, e. g. , sodium hydroxide, are made in concentrated and dilute aqueous solutions simultaneously by electrolyzing brine in a cell having a plurality of compartments or zones therein, preferably three, wherein anode and cathode compartments are separated by a buffer compartment formed by permselective membranes of a hydrolyzed copolymer of tetrafluoroethylene and a fluorosulfonated perfluorovinyl ether or of a sulfostyrenated perfluorinated ethylene propylene polymer, while adding water to the buffer zone at such a rate as to produce a dilute hydroxide solution therein at the same time that a relatively concentrated hydroxide solution is being made in the cathode compartment, while maintaining a high caustic current efficiency. For example, sodium hydroxide drawn off from the cathode compartment can have a concentration of from 280 to 340 grams per liter while the more dilute caustic obtainable from the buffer compartment may be at 60 to 150 g. /l. , with the caustic current efficiency being 80% or more.

US Patent:

39403238, Feb 24, 1976

Filed:

May 5, 1975

Appl. No.:

5/574805

Inventors:

Edward H. Cook - Lewiston NY

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C25B 126
C25B 116
C25B 1108
C25B 1110

US Classification:

204 95

Abstract:

An electrode, for use in electrolytic processes, comprises a valve metal substrate, such as titanium, a coating thereon of electroconductive tin oxide containing a doping amount of molybdenum, preferably about 0. 1 to about 15 mole percent of molybdenum based on the moles of tin, and an outer coating of a noble metal or noble metal oxide.

US Patent:

41705408, Oct 9, 1979

Filed:

Mar 31, 1978

Appl. No.:

5/891987

Inventors:

Christine A. Lazarz - Niagara Falls NY
Edward H. Cook - Niagara Falls NY
Lesleigh V. Scripa - East Hartford CT

Assignee:

Hooker Chemicals & Plastics Corp. - Niagara Falls NY

International Classification:

B29D 2700
C25B 1308
C25B 126

US Classification:

204296

Abstract:

Microporous membrane materials suitable for electrolytic cell utilization are formed from the blend of particulate polytetrafluoroethylene, a dry pore forming particulate material, and an organic lubricant. The materials are milled and formed into a sheet, which is rolled to the desired thickness, sintered, and subjected to leaching of the pore forming materials.

US Patent:

41464451, Mar 27, 1979

Filed:

Dec 27, 1977

Appl. No.:

5/864306

Inventors:

Edward H. Cook - Niagara Falls NY
Dirk Pouli - Williamsville NY

Assignee:

Hooker Chemicals & Plastics Corp. - Niagara Falls NY

International Classification:

C25B 120
C25B 126

US Classification:

204 98

Abstract:

A method for electrolytically producing a purified alkali metal hydroxide solution by electrolyzing an alkali halide solution in a membrane cell is described. The membrane cell includes at least one buffer compartment separating an anolyte and a catholyte compartment. The barrier separating the anolyte and the buffer compartment is a porous or permeable membrane. The membrane separating the catholyte compartment and the buffer compartment is a cation-active, hydrocarbon, preferably non-porous, membrane. A minor amount of a compound selected from the group consisting of alkali metal sulfites, bisulfites, sulfides, oxalates, or mixtures thereof, is added to the electrolyte, preferably with the brine feed, to protect the membranes from hypohalites formed in the cell. Amounts of protective compounds between about 0. 01 and about 2.

US Patent:

41244770, Nov 7, 1978

Filed:

Oct 5, 1976

Appl. No.:

5/729639

Inventors:

Daniel T. Tokawa - Vancouver, CA
Bernardus J. Mentz - North Vancouver, CA
Jeffrey D. Eng - North Vancouver, CA
Edward H. Cook - Lewiston NY
Gerald R. Marks - Youngstown NY

Assignee:

Hooker Chemicals & Plastics Corp. - Niagara Falls NY

International Classification:

C25B 1302
C25B 1308
C25B 900
C25B 134

US Classification:

204252

Abstract:

An electrolytic cell suitable for use in electrolyzing ionizable chemical compounds, particularly alkali metal halide brines and hydrohalic acids, which comprises a cell body having an anode compartment containing a porous anode and a cathode compartment containing a cathode said compartments being separated from each other by a prestretched, taut membrane barrier which is substantially impervious to gases and liquids and which is selected from a hydrolyzed copolymer of a perfluorinated hydrocarbon and a sulfonated perfluorinated hydrocarbon and a sulfonated perfluorovinyl ether, and a sulfostyrenated perfluorinated ethylene propylene polymer, said barrier being pretreated by hydrolyzing and stretching prior to insertion in the cell. Such cells can be operated at constant low voltage, and are not subject to erratic operating voltages which are due, in part at least, to the accumulation of gases between the anode and diaphragm.

US Patent:

40615502, Dec 6, 1977

Filed:

Oct 10, 1975

Appl. No.:

5/621459

Inventors:

Edward H. Cook - Lewiston NY
Alvin T. Emery - Youngstown NY

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C25B 116
C25B 126

US Classification:

204 98

Abstract:

An electrolytic cell, suitable for use in electrolyzing alkali metal halide brines, which comprises a cell body having an anode compartment containing an anode, a cathode compartment containing a cathode and at least two buffer compartments between said anode and cathode compartments, said anode compartment and said buffer compartments being separated from each other by a barrier which is substantially impervious to fluids and gases, selected from a hydrolyzed copolymer of tetrafluoroethylene and a sulfonated perfluorovinyl ether having the formula: FSO. sub. 2 CF. sub. 2 CF. sub. 2 OCF(CF. sub. 3)CF. sub. 2 OCF=CF. sub. 2 said copolymer having an equivalent weight of from about 900 to 1600, and a sulfostyrenated perfluorinated ethylene propylene polymer and said cathode compartment being separated from the next adjacent buffer compartment by a porous diaphragm.

US Patent:

39560830, May 11, 1976

Filed:

May 5, 1975

Appl. No.:

5/574806

Inventors:

Edward H. Cook - Lewiston NY

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C25B 126
C25B 116
C25B 1110

US Classification:

204 95

Abstract:

An electrode for use in electrolytic processes, comprises a valve metal substrate, a coating thereon of conductive tin oxide containing a doping amount of tellurium, preferably up to about 0. 3 mole percent of tellurium, based on moles of tin, and an outer coating of a noble metal or noble metal oxide.

US Patent:

41000501, Jul 11, 1978

Filed:

Nov 29, 1973

Appl. No.:

5/420242

Inventors:

Edward H. Cook - Lewiston NY
Gerald R. Marks - Youngstown NY

Assignee:

Hooker Chemicals & Plastics Corp. - Niagara Falls NY

International Classification:

C25B 116
C25B 126
C25B 900

US Classification:

204252

Abstract:

An improved anode structure for a chlor-alkali type diaphragm cell wherein the anode is a porous, valve metal, e. g. , titanium, anode having on one side a coating of a noble metal or noble metal oxide and on the uncoated side a membrane composed essentially of a cation-active permselective material which is substantially impervious to liquids and gases. The membrane covered surface is disposed spaced from but facing the cathode member. Anodes of this improved structure give minimum cell voltage and a surprisingly reduced consumption rate of the noble metal or oxide coating.