Catalyst consisting of a hollow cylindrical carrier having a cat

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

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562534, 562535, 502304, 502305, 502306, 502307, 502308, 502309, 502310, 502311, 502312, 502313, 502314, 502315, 502316, 502317, 502318, 502319, 502320, 502321, 502322, 502323, 502439, 502523, C07C 51235, C01G 3902

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active

059106085

ABSTRACT:
A coated catalyst which consists of a hollow cylindrical carrier and a catalytically active oxide material applied to the outer surface of the carrier, the applied catalytically active oxide material being applied in a coat thickness of from 10 to 1000 .mu.m, and having a specific catalytic surface area of from 20 to 30 m.sup.2 /g and an abrasion of <10, preferably <5, particularly preferably <0,5, % by weight in the turntable abrasion test. The catalyst is useful in the preparation of acrylic acid by the gas phase oxidation of acroleins.

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patent: 4438217 (1984-03-01), Takata et al.
patent: 4560673 (1985-12-01), Shaw
patent: 5677261 (1997-10-01), Tenten et al.

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