US4013525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cells
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1974-09-19
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Granted: 1977-03-22
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Expires: 1994-09-19
Abstract
Abstract An electrolytic cell, for example for the manufacture of chlorine from sodium chloride brine, comprising an anode, a cathode and a diaphragm separating the anode and the cathode wherein the anode presents to the cathode a plurality of parallel elongated members carrying on at least part of their surfaces an electrocatalytically active coating and wherein said elongated members are rigidly mounted in the cell so that a substantial portion of said active surfaces is six millimeters or less from the cathode. The elongated members are preferably in the form of blades, rods or channel shaped members, which may be mounted on, for example, backing plates, backing frames or multiapertured sheets. The elongated members and support means are preferably of titanium and the coating is preferably a mixture of ruthenium oxide and titanium oxide.
Inventors
- 👤 Alan Brian Emsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:52
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
93 words
An electrolytic cell comprising an anode, a cathode and a diaphragm separating the anode and the cathode wherein the anode presents to the cathode a plurality of spaced-apart parallel elongated members disposed in vertical planes so as to form a plurality of vertical channels, said members being constructed of a film-forming metal and carrying on at least part of their surfaces an electrocatalytically active coating and wherein said elongated members are rigidly mounted in the cell so that a substantial portion of said active surfaces is 6 millimeters or less from the cathode.
Claim 2
Dependent Claim
93 words
An electrolytic cell comprising an anode, a cathode and a diaphragm separating the anode and the cathode wherein the anode presents to the cathode a plurality of spaced-apart parallel elongated members disposed in vertical planes so as to form a plurality of vertical channels, said members being constructed of a film-forming metal and carrying on at least part of their surfaces an electrocatalytically active coating and wherein said elongated members are rigidly mounted in the cell so that a substantial portion of said active surfaces is 6 millimeters or less from the cathode.
Claim 3
Dependent Claim
22 words
An electrolytic cell as claimed in claim 1 wherein said elongated members are mounted on support means forming part of the anode.
Claim 4
Dependent Claim
19 words
An electrolytic cell as claimed in claim 2 wherein the elongated members present their narrower edge to the cathode.
Claim 5
Dependent Claim
28 words
An electrolytic cell as claimed in claim 2 wherein said elongated members are in the form of blades, rods or channel shaped members mounted on said support means.
Claim 6
Dependent Claim
46 words
An electrolytic cell as claimed in claim 2 wherein said elongated members are in the form of double blades which are spaced apart from and connected to one another by one or more bridge portions suitable for strengthening purposes and/or for connecting to said support means.
Claim 7
Dependent Claim
24 words
An electrolytic cell as claimed in claim 1 wherein the distance between adjacent elongated members is in the range of 1.5 to 10 mm.
Claim 8
Dependent Claim
24 words
An electrolytic cell as claimed in claim 6 wherein the distance between adjacent elongated members is in the range from 2 to 5 mm.
Claim 9
Dependent Claim
16 words
An electrolytic cell as claimed in claim 2 wherein said support means comprises a backing plate.
Claim 10
Dependent Claim
25 words
An electrolytic cell as claimed in claim 8 wherein said support means is a substantially solid metal sheet provided with apertures for recycling of anolyte.
Claim 11
Dependent Claim
16 words
An electrolytic cell as claimed in claim 2 wherein said support means comprises a backing frame.
Claim 12
Dependent Claim
27 words
An electrolytic cell as claimed in claim 10 wherein said backing frame is provided with one or more lateral support ribs for connection to said elongated members.
Claim 13
Dependent Claim
38 words
An electrolytic cell as claimed in claim 2 wherein said support means comprises a lateral support bar connected to one end of the elongated members and suitable for connecting the said members to the baseplate of the cell.
Claim 14
Dependent Claim
17 words
An electrolytic cell as claimed in claim 2 wherein said support means comprises a multi-apertured backing sheet.
Claim 15
Dependent Claim
22 words
An electrolytic cell as claimed in claim 13 wherein said foraminous metal backing sheet comprises woven gauze, drilled plate or expanded metal.
Claim 16
Dependent Claim
21 words
An electrolytic cell as claimed in claim 1 wherein said elongated members are made of a film-forming metal as hereinbefore defined.
Claim 17
Dependent Claim
21 words
An electrolytic cell as claimed in claim 1 wherein said support means is made of a film-forming metal as hereinbefore defined.
Claim 18
Dependent Claim
19 words
An electrolytic cell as claimed in claim 15 wherein the film-forming metal is titanium or an alloy of titanium.
Claim 19
Dependent Claim
26 words
An electrolytic cell as claimed in claim 1 wherein the electrocatalytically active coating comprises a platinum group metal oxide and an oxide of a film-forming metal.
Claim 20
Dependent Claim
17 words
An electrolytic cell as claimed in claim 17 wherein the coating comprises ruthenium oxide and titanium oxide.
Claim 21
Dependent Claim
18 words
An electrolytic cell as claimed in claim 1 wherein the cathode comprises a perforated metal plate or tube.
Claim 22
Dependent Claim
22 words
An electrolytic cell as claimed in claim 1 wherein the cathode comprises a plurality of parallel elongated members mounted on support means.
Claim 23
Dependent Claim
25 words
An electrolytic cell as claimed in claim 21 wherein the cathode comprises a plurality of blades, rods or channel shaped members mounted on support means.
Claim 24
Dependent Claim
51 words
An electrolytic cell as claimed in claim 22 wherein the cathode comprises a plurality of parallel elongated members in the form of double blades which are spaced apart from and connected to one another by one or more bridge portions suitable for strengthening purposes and/or for connecting to said support means.
Claim 25
Dependent Claim
15 words
An electrolytic cell as claimed in claim 1 wherein the cathode is of mild steel.
Claim 26
Dependent Claim
13 words
An electrolytic cell as claimed in claim 1 wherein the diaphragm comprises polytetrafluoroethylene.
Claim 27
Dependent Claim
13 words
An electrolytic cell as claimed in claim 1 wherein the diaphragm comprises asbestos.
Claim 28
Dependent Claim
17 words
An electrolytic cell as claimed in claim 1 wherein the anode/cathode gap is 1.5 to 3 mm.
Claim 29
Dependent Claim
22 words
An electrolytic cell as claimed in claim 1 wherein the elongated members of the anode are mounted substantially vertically in the cell.
Claim 30
Dependent Claim
22 words
A method of manufacturing chlorine by electrolysing an aqueous alkali metal chloride solution in an electrolytic cell as claimed in claim 1.
Claim 31
Dependent Claim
15 words
A method as claimed in claim 29 wherein the alkali metal chloride is sodium chloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |