Catalyst for use in treating gas
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAtsushi Nishino, Kazunori Sonetaka, Kunio Kimura
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Abstract
Two types of catalysts are disclosed. They are: 1. Catalyst for oxidation of carbon monoxide, nitrogen monoxide or sulfur dioxide, comprising manganese dioxide, calcium aluminate, iron oxyhydroxide and copper hydroxycarbonate; and 2. Catalyst for oxidation of carbon monoxide, nitrogen monoxide or sulfur dioxide, prepared by heating a mixture of manganese dioxide calcium aluminate, iron oxyhydroxide and copper hydroxycarbonate.
Claims14
A catalyst comprising a mixture of from 45 to 75% by weight of manganese dioxide, from 15 to 25% by weight of calcium aluminate, from 5 to 15% by weight of iron oxyhydroxide and from 2 to 10% by weight of copper hydroxycarbonate.
A catalyst prepared by heating a mixture of from 45 to 75% by weight of manganese dioxide, from 15 to 25% by weight of calcium aluminate, from 5 to 15% by weight of iron oxyhydroxide and from 2 to 10% by weight of copper hydroxycarbonate at a temperature between 220.degree. C and 850.degree. C for 1 to 5 hours.
A process for preparing a catalyst which comprises:
- a. adding water to a mixture of from 45 to 75% by weight of manganese dioxide, from 15 to 25% by weight of calcium aluminate, from 5 to 15% by weight of iron oxyhydroxide and from 2 to 10% by weight of copper hydroxycarbonate,
- b. forming the mixture into the desired shape, and
- c. accomplishing the curing of the shaped body in the presence of water to solidify the shaped body.
A process of preparing a catalyst which comprises:
- a. adding water to a mixture of from 45 to 75% by weight of manganese dioxide, from 15 to 25% by weight of calcium aluminate, from 5 to 15% by weight of iron oxyhydroxide and from 2 to 10% by weight of copper hydroxycarbonate,
- b. forming the mixture into the desired shape,
- c. accomplishing the curing of the shaped body in the presence of water to solidify the shaped body, and
- d. heating the solidified body at a temperture between 220.degree. C and 850.degree. C for 1 to 5 hours.
Dependencies are inferred from the claim text.