Electrode for electrolytic production of chlorine

US8430997B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Ruiyong Chen · Shantou, CN
• Vinh Trieu · Cologne, DE
• Harald Natter · Saarburg, DE
• Rolf Hempelmann · Sankt Ingbert, DE
• Andreas Bulan · Langenfeld, DE
• Jürgen Kintrup · Leverkusen, DE
• Rainer Weber · Leverkusen, DE

Key dates

• Filing date: Jun 17, 2011
• Grant date: Apr 30, 2013
• Expiry date: Nov 2, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25B11/093
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present invention relates to an electrode that includes an electrically conducting substrate based on a valve metal having a main proportion of titanium, tantalum or niobium, and an electrocatalytically active coating comprising up to 50 mol % of a noble metal oxide or noble metal oxide mixture and at least 50 mol % of titanium oxide. The coating includes a minimum proportion of oxides of anatase structure determined by a ratio of the signal height of the most intensive anatase reflection in an x-ray diffractogram (CuKα radiation) after subtraction of a linear background to the signal height of the most intensive rutile reflection in the same diffractogram, wherein the ratio is at least 0.6.