Electrode for electrochlorination processes

Patent metadata

Field	Value
Publication number	US-11365136-B2
Application number	US-201916567712-A
Country	US
Kind code	B2
Filing date	Sep 11, 2019
Priority date	Mar 14, 2018
Publication date	Jun 21, 2022
Grant date	Jun 21, 2022

Abstract

The present invention relates to an electrode for electrochlorination processes, optionally operable under polarity reversal conditions, comprising an active layer provided with a doped Ru—Ti catalytic composition.

First claim

The invention claimed is:

1. An electrode suitable for electrochlorination processes comprising:
a valve metal substrate; and
at least one active layer comprising:
a catalytic composition of ruthenium, titanium; and
at least a first doping agent Y1,

wherein ruthenium is between 20-50%, titanium is equal or below 79.8% and Y1 is between 0.2-3.2% expressed in weight percentage referred to the ruthenium and titanium;
Y1 comprising copper or its oxides, and wherein Y1 further comprises rhodium, platinum, iridium, their oxides, or any combination thereof.

2. The electrode according to claim 1 wherein the amount of Y1 is between 0.6-1.7%.

3. The electrode according to claim 1 wherein the amount of Y1 is between 0.6-1.7%.

4. The electrode according to claim 1 wherein the catalytic composition further comprises an optional second doping agent containing 0.2-2.2% of palladium or its oxides.

5. The electrode according to claim 1 wherein the catalytic composition further comprises 0.2-2.2% of palladium or its oxides.

6. The electrode according to claim 1 wherein the amount of Y1 is 0.6-1.7% and palladium is 0.5-1.4%.

7. The electrode according to claim 1 wherein Y1 consists of copper, copper and rhodium, copper and iridium, or the combination of rhodium, copper and iridium, or oxides thereof.

8. The electrode according to claim 7 wherein the amount of Y1 is between 0.6-1.7%.

9. The electrode according to claim 7 wherein the catalytic composition further comprises 0.2-2.2% of palladium or its oxides.

10. The electrode according to claim 8 wherein the catalytic composition further comprises 0.5-1.4% of palladium or its oxides.

Assignees

• Industrie De Nora Spa

Inventors

• Ramunni Anna
• Timpano Fabio

Classifications

• C25B11/089

  Alloys · CPC title

• C25B11/063

  Valve metal, e.g. titanium · CPC title

• C02F2201/4613

  Inversing polarity · CPC title

• C02F2103/42

  from bathing facilities, e.g. swimming pools · CPC title

• C02F2001/46142

  Catalytic coating · CPC title