The Japan Carlit Co., Ltd.

Morioki Shibuya

Isao Isa

Makoto Ebisawa

Hideo Yamamoto

Syuki Shindo

Highly pure chlorine dioxide is generated very efficiently and safely in a single generator-crystallizer by reducing an alkali metal chlorate with chloride ion in a strong acid in the presence of hydrogen peroxide and a complex catalyst of palladium (II) with chloride ion.

Process for manufacturing highly pure chlorine dioxide

From a chlorate cell liquor containing an alkali metal chlorate, an alkali metal chloride and Cr(VI) ions, Cr(VI) ions are recovered by means of a combination of simple chemical procedures and re-used in an electrolysis step for manufacturing an alkali metal chlorate.

Process for recovering Cr(VI) ions from a chlorate cell liquor

Chlorine dioxide is generated very efficiently and safely by reducing an alkali metal chlorate with hydrochloric acid in a single generator-crystallizer in the presence of a chloropalladinate(II) complex catalyst or a mixed catalyst consisting of said chloropalladinate(II) complex catalyst and a compound or ions selected from the group consisting of vanadium pentoxide, manganese ions, dichromate ions, lead ions, and arsenic ions.

Process for manufacturing chlorine dioxide

Chlorine dioxide is generated very efficiently and safely by reducing a chlorate in a strong acid in the presence of a catalyst containing thallium ions together with palladium ions or silver ions.

Manufacturing chlorine dioxide with thallium and silver or palladium

Chlorine dioxide is generated very efficiently and safely by reducing a chlorate in a strong acid in the presence of a complex catalyst consisting of palladium(II) and an amino acid or an alkali metal salt thereof.

Manufacture of chlorine dioxide by reduction of a specified chlorate

Chlorine dioxide is generated very efficiently and safely by reducing a chlorate in a strong acid in the presence of a complex catalyst consisting of palladium (II) and a .beta.-diketone.

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Shibukawa, Japan

Morioki Shibuya