Patent ID: 6169214
Filing Date: 2001-01-02
Classification: B01J,C07C,Y10S

Abstract:
A coated catalyst consisting of a hollow cylindrical carrier having a length from 2 to 10 mm, an external diameter from 4 to 10 mm and a wall thickness of from 1 to 4 mm and a catalytically active oxide material which is applied to the outer surface of the carrier and is of the formula II Mo.sub.12 Bi.sub.a Fe.sub.b X.sub.c.sup.1 X.sub.d.sup.2 X.sub.c.sup.3 X.sub.f.sup.4 O.sub.n (II), where X.sup.1 is nickel or cobalt, X.sup.2 is thallium, an alkali metal or an alkaline earth metal, X.sup.3 is phosphorus, arsenic, boron, antimony, tin, cerium, lead, niobium or tungsten, X.sup.4 is silicon, aluminum, titanium or zirconium, a is from 0.5 to 5, b is from 0.01 to 3, c is from 3 to 10, d is from 0.02 to 2, e is from 0 to 5, f is from 0 to 10 and n is a number which is determined by the valency and frequency of the elements in II which differ from oxygen, 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% by weight in a turntable abrasion test.