Electrode for electrochemical processes and method of producing the same

• US 4,029,566 A
• Filed: 01/15/1975
• Issued: 06/14/1977
• Est. Priority Date: 02/02/1974
• Status: Expired due to Term

• Current Assignee: Sigri Elektrographit GmbH
• Original Assignee: Sigri Elektrographit GmbH
• Inventors: Brandmair, Franz, Honig, Dietmar, Rubisch, Ottmar
• Primary Examiner(s): Edmundson, F.C.
• Application Number:
  US05/541,348
• Time in Patent Office: 881 Days
• Field of Search: 204/290 R, 204/290 F, 204/291
• US Class Current: 204/290.08
• CPC Class Codes: C25B 11/02 characterised by shape or form
• CPC Class Codes: C25B 11/055 characterised by the substrate or carrier material
• CPC Class Codes: C25B 11/057 consisting of a single element or compound
• CPC Class Codes: C25B 11/097 comprising two or more noble metals or noble metal alloys

Abstract

Electrode for electrochemical processes has a base formed of passivatable material, and a covering layer of activating substance at least partly covering the base, the material of the base consisting of titanium oxide TiO_x, wherein x = 0.25 to 1.50; and method of producing the same.

Claims

1. Chlorine resistant sintered electrode for aqueous electrolysis comprising a base formed of passivatable material, and a covering layer of activating substance at least partly covering said base, the material of said base consisting fo titanium oxide TiO_x, wherein x ×

0.25 to 1.50, said material of said base having been sintered by heating in an inert gas atmosphere to a temperature of from 1200°

C to 1400°

C.

2. Electrode according to claim 1 wherein x ×

0.42 to 0.6.

3. Electrode according to claim 1 wherein 20 to 50% by volume of said base is formed with pores having a mean diameter of from 0.5 to 5 mm.

4. Electrode according to claim 1 wherein said electrode base has a surface facing away from said covering layer, said surface having a layer of sintered titanium.

5. Electrode according to claim 1 having a rectangular bottom surface formed with a series of slots of uniformly increasing depth extending from one side of the electrode to the opposite side thereof.

6. Electrode according to claim 5 wherein said slots are defined by surfaces of the electrode extending vertically along respective edges formed at the bottom surface thereof, said edges formed between said vertical surfaces of said slots and said bottom surface being rounded.

7. Electrode according to claim 5 including a shield mounted at the side of the electrode at which said slots are deepest and extending a given vertical distance so as to be just below a desired electrolyte surface level.

8. Electrode according to claim 1 having a top surface inclined with respect to the bottom surface thereof.

9. Electrode according to claim 1 wherein said electrode base is formed with an upper, a lower and at least one lateral surface, at least one of said surfaces being formed with rib-like re-enforcing members.