Akzo Nobel N.v.

Eka Nobel Ab

Arne Carlsson

Johan Wanngard

Bo Håkansson

Eduardo Fontes

Hans-Göran Sundström

Lars Blomgren

Magnus Davidsson

Jan E Backstrom

The invention relates to a construction for ventilation of hydrogen gas comprising at least a first metallic layer (), sensitive to hydrogen embrittlement, a second () metallic layer, and a mesh (), wherein the first layer () is joined to the second layer (), and said mesh (), forming venting channels () through which channels () hydrogen can be vented, is joined to, and in between, said first () and second () metallic layers. The invention further concerns a method for production thereof.

Method and construction for ventilation of hydrogen gas

The present invention relates to a process to limit the content of impurities in the production of alkali metal chlorate, by integrating the production of chlorate with the production of chlorine and alkali metal hydroxide, which auxiliary chemicals are used in the chlorate process. The alkali metal chlorate is produced by electrolysis of a purified electrolyte containing alkali metal chloride, alkalization of the chlorate electrolyte obtained and precipitation of the chlorate formed by evaporation of the chlorate electrolyte. The very pure water separated in the crystallizer and alkali metal chloride is used in a membrane or diaphragm cell in the production of alkali metal hydroxide, which hydroxide is used in the production of alkali metal chlorate. Either pure chlorine or hydrogen chloride absorbed in water can be used in acidification, at which hydrogen chloride is produced from chlorine and hydrogen generated in the process.

Process for electrolytic production of alkali metal chlorate and

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Columbus, MS, United States of America

Arne Carlsson