초록 ▼

Manganese dioxide is produced from manganous salts by mixing a manganous salt with an alkali metal permanganate and/or ammonium permanganate followed by heating such mixture to about 150°C. under an oxygen-containing atmosphere until at least 85% of the manganous salt is converted to manganese dioxi

Manganese dioxide is produced from manganous salts by mixing a manganous salt with an alkali metal permanganate and/or ammonium permanganate followed by heating such mixture to about 150°C. under an oxygen-containing atmosphere until at least 85% of the manganous salt is converted to manganese dioxide and then further elevating the temperature to about 250°C. and maintaining this temperature until the surface area of the manganese dioxide is between about 3 square meters per gram and about 12 square meters per gram.

대표청구항 ▼

A process for the production of manganese dioxide comprising the steps of: (a) mixing at least one manganous salt (Mn2+) with at least one compound (MnO4-) selected from the group consisting of alkali metal permangantes and ammonium permanganate to produce a homogeneous solid mixture; (b) heating th

A process for the production of manganese dioxide comprising the steps of: (a) mixing at least one manganous salt (Mn2+) with at least one compound (MnO4-) selected from the group consisting of alkali metal permangantes and ammonium permanganate to produce a homogeneous solid mixture; (b) heating the homogeneous mixture of step (a) to between about 120°C. and about 180°C. in an oxygen-containing atmosphere until at least 85% of the manganous salt is converted into manganese dioxide; and (c) heating the product produced in step (b) in an oxygen-containing atmosphere at between about 210°C. and about 300°C. until the surface area of the manganese dioxide is between about 3 square meters per gram and about 12 square meters per gram.