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US4364815A Expired / Lapsed US ⏱️ 0.0 years remaining

Solid polymer electrolyte chlor-alkali process and electrolytic cell

Assignee: PPG Industries Inc
•
Filing: 1981-06-22
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Granted: 1982-12-21
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Expires: 2001-06-22
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Abstract

Abstract Disclosed is a solid polymer electrolyte electrolytic cell, e.g., for chlorine production, where the electrodes are in compressive contact with and removable from the permionic membrane. For a preferred exemplification the anode is in compressive contact with and removable from the permionic membrane, and the cathode is bonded to the permionic membrane.

Inventors

  • 👤 William B. Darlington
  • 👤 Donald W. DuBois

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 01:03
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B9/00; C25B9/17; C25B9/19; C25B9/23

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 262 words
In an electrolytic cell having an anode separated from a cathode by a permionic membrane, said anode and said cathode both contacting said permionic membrane, the improvement wherein said anode comprises a pervious substrate having anodic electrocatalyst bonded thereto, said anode bearing upon the permionic membrane, said cathode is bonded to and embedded in the permionic membrane, and said permionic membrane comprises a fluorocarbon resin having the moieties: --CF.sub.2 -CXX'-- and --CF.sub.2 -CXY-- where X is chosen from the group consisting of --F, --Cl, --H, and --CF 3 ; X' is chosen from the group consisting of --F, --Cl, --H, --CF 3 , and (CF 2 ) m CF, where m is an integer from 1 to 5; Y is chosen from the group consisting of --A, --φA, --P--A, and --O--(CF 2 ) n --(P,Q,R)--A, where P is (--CF 2 ) a (CXX') b (CF 2 ) c , Q is (--CF 2 --O--CXX') d and R is (--CXX'--O--CF 2 ) e , (P,Q,R) is or contains one or more of P, Q, and R n is 0 or 1; a,b,c,d, and e are integers from 0 to 6; φ is a phenylene group and A is chosen from the group consisting of --COOH, --CN, --COF, --COCl, --COOR, --COOM, and --CONR 2 R 3 , where R 1 is a C 1 to C 10 alkyl group, and R 2 and R 3 are chosen from the group consisting of --H, and C 1 to C 10 alkyl groups; and m is chosen from the group consisting of --H and alkali metals.
Claim 2
Dependent Claim 262 words
In an electrolytic cell having an anode separated from a cathode by a permionic membrane, said anode and said cathode both contacting said permionic membrane, the improvement wherein said anode comprises a pervious substrate having anodic electrocatalyst bonded thereto, said anode bearing upon the permionic membrane, said cathode is bonded to and embedded in the permionic membrane, and said permionic membrane comprises a fluorocarbon resin having the moieties: --CF.sub.2 -CXX'-- and --CF.sub.2 -CXY-- where X is chosen from the group consisting of --F, --Cl, --H, and --CF 3 ; X' is chosen from the group consisting of --F, --Cl, --H, --CF 3 , and (CF 2 ) m CF, where m is an integer from 1 to 5; Y is chosen from the group consisting of --A, --φA, --P--A, and --O--(CF 2 ) n --(P,Q,R)--A, where P is (--CF 2 ) a (CXX') b (CF 2 ) c , Q is (--CF 2 --O--CXX') d and R is (--CXX'--O--CF 2 ) e , (P,Q,R) is or contains one or more of P, Q, and R n is 0 or 1; a,b,c,d, and e are integers from 0 to 6; φ is a phenylene group and A is chosen from the group consisting of --COOH, --CN, --COF, --COCl, --COOR, --COOM, and --CONR 2 R 3 , where R 1 is a C 1 to C 10 alkyl group, and R 2 and R 3 are chosen from the group consisting of --H, and C 1 to C 10 alkyl groups; and m is chosen from the group consisting of --H and alkali metals.
Claim 3
Dependent Claim 22 words
The electrolytic cell of claim 1 wherein the cathode is bonded to and embedded in a thermoplastic deformate of the permionic membrane.
Claim 4
Dependent Claim 20 words
The electrolytic cell of claim 1 wherein the permionic membrane is compressed between 1 and 20 pounds per square inch.
Claim 5
Dependent Claim 88 words
The electrolytic cell of claim 1 wherein Y is chosen from the group consisting of --CF 2 -- x A, --O--CF 2 ) x A, --O--CF 2 ) x A, --OCF 2 CFZ-- y A, --OCF 2 CFZ-- x --OCF 2 CF 2 --A, and --O--CF 2 --CF 2 OCFZ-- y --CF 2 ) y --CF 2 OCFR-- z where x, y, and z are 1 to 10, and Z and R are chosen from the group consisting of --F and C 1 to C 10 alkyl groups.
Claim 6
Dependent Claim 27 words
The electrolytic cell of claim 5 wherein A is chosen from the group consisting of --COOH, --CN, --COF, --COCl, --COOR, --COOM, and CONR 2 R 3 .

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-12-20 1986-06-21 1986-12-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-12-20 1990-06-21 1990-12-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-12-20 1994-06-21 1994-12-21 $7700.00 Window Closed / Lapsed

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