US3855084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a coated anode
Assignee: Individual
•
Filing: 1973-07-18
•
Granted: 1974-12-17
•
Expires: 1993-07-18
Abstract
Abstract An electrode useful for electrowinning and other processes including evolution of oxygen or chlorine or for plating is formed of titanium particles, compacted cold, and coated and cemented with a first layer of manganese dioxide thermally deposited from Mn (NO3)2 on the grains to form a coating of a combination of manganese dioxide and titanium oxide having a rutile crystal structure, and a further outer layer of manganese dioxide which is electrodeposited, the two coatings not being limited to the surface of the electrode but extending to all exposed surfaces of the grains including those which are walls of channels between the grains. The compression of the titanium powder is to a density between 30 and 70 percent of the density of solid metal. Solid metal such as metal mesh may be included in the titanium powder prior to compacting, such as expanded titanium metal, to assist in strengthening the form. In an alternate embodiment the metal substrate is lead.
Inventors
- 👤 N Feige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:45
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02; C25B11/04; C25B11/051; C25B11/054; C25B11/073; C25B11/091
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
79 words
A METHOD OF MANUFACTURING AN ELECTRODE COMPRISING THE STEPS OF: FIRST, COLD COMPACTING METAL PARTICLES CHOSEN FROM THE GROUP CONSISTING OF TITANIUM AND LEAD TO FORM AN ELECTRODE HAVING AN EXTENSIVELY INTERCONNECTED PORE SYSTEM BETWEEN THE PARTICLES; SECOND, DEPOSITING A FIRST LAYER OF MANGANESE DIOXIDE ON THE EXTERIOR SURFACE OF THE COMPACT AND WITHIN THE PORES BETWEEN PARTICLES BY THERMAL DECOMPOSITION OF A SOLUTION OF MN (NO3)2; AND THIRD, ELECTRODEPOSITING A LAYER OF MANGANESE DIOXIDE ON SAID FIRST LAYER.
Claim 2
Independent Claim
79 words
A METHOD OF MANUFACTURING AN ELECTRODE COMPRISING THE STEPS OF: FIRST, COLD COMPACTING METAL PARTICLES CHOSEN FROM THE GROUP CONSISTING OF TITANIUM AND LEAD TO FORM AN ELECTRODE HAVING AN EXTENSIVELY INTERCONNECTED PORE SYSTEM BETWEEN THE PARTICLES; SECOND, DEPOSITING A FIRST LAYER OF MANGANESE DIOXIDE ON THE EXTERIOR SURFACE OF THE COMPACT AND WITHIN THE PORES BETWEEN PARTICLES BY THERMAL DECOMPOSITION OF A SOLUTION OF MN (NO3)2; AND THIRD, ELECTRODEPOSITING A LAYER OF MANGANESE DIOXIDE ON SAID FIRST LAYER.
Claim 3
Dependent Claim
11 words
The method of claim 1 in which the particles are titanium.
Claim 4
Dependent Claim
11 words
The method of claim 1 in which the particles are lead.
Claim 5
Dependent Claim
22 words
The method of claim 2 in which the particles comprise powder predominantly in the size range of +100 mesh to -325 mesh.
Claim 6
Dependent Claim
28 words
The method of claim 1 in which the particles are compacted along with aT least one solid titanium metal reinforcement to increase the mechanical strength of the electrode.
Claim 7
Dependent Claim
43 words
The method of claim 2 in which during the second step the forming manganese dioxide coating interchanges atoms with the titanium and titanium oxide normally present on the surface of the particles to form a modified rutile crystal structure which is electrically conductive.
Claim 8
Dependent Claim
16 words
The method of claim 1 in which the electrodeposited manganese dioxide is approximately 100 microns thick.
Claim 9
Dependent Claim
31 words
The method of claim 1 wherein the density of the compacted particles is between 30 and 70 percent of the density of the solid metal of which the particles are composed.
Claim 10
Independent Claim
100 words
A method of forming an electrode comprising the steps of: first, forming the body of the electrode from particles of titanium; second, thermally decomposing manganeous nitrate in contact with the electrode to form a layer of the intermediate product manganeous-manganite; third, causing ion exchange between the body of the electrode and the coating to replace manganese ions with titanium ions; fourth, causing the product to coat the surfaces of the particles to form an adherent coating of a highly conductive film of manganese-titanium oxide; and fifth, thereafter electrodepositing a layer of manganese dioxide on the surfaces of the coated particles.
Claim 11
Independent Claim
100 words
A method of forming an electrode comprising the steps of: first, forming the body of the electrode from particles of titanium; second, thermally decomposing manganeous nitrate in contact with the electrode to form a layer of the intermediate product manganeous-manganite; third, causing ion exchange between the body of the electrode and the coating to replace manganese ions with titanium ions; fourth, causing the product to coat the surfaces of the particles to form an adherent coating of a highly conductive film of manganese-titanium oxide; and fifth, thereafter electrodepositing a layer of manganese dioxide on the surfaces of the coated particles.
Claim 12
Dependent Claim
33 words
The method of claim 9 in which the second step cements the grains or particles together in the body of the electrode thereby forming a mechanically sound electrode for use as an anode.
Claim 13
Dependent Claim
20 words
The method of claim 9 in which the powder is in the size range of +100 mesh to -325 mesh.
Claim 14
Dependent Claim
28 words
The method of claim 9 in which the powder is compacted along with at least one solid titanium metal reinforcement to increase the mechanical strength of the electrode.
Claim 15
Dependent Claim
39 words
The method of claim 9 in which during step 2 the manganese dioxide coating is reacted with the titanium oxide normally present on the surface of the particles to form a modified rutile crystal structure which is electrically conductive.
Claim 16
Dependent Claim
16 words
The method of claim 9 in which the electrodeposited manganese dioxide is approximately 100 microns thick.
References Cited (Backward Citations)
US2867570A
Cited
US3278410A
Cited
US3535217A
Cited
US3663280A
Cited
US3634216A
Cited
US3689384A
Cited
US3711397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |