Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2007-06-19
2007-06-19
Nguyen, Cam N. (Department: 1754)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S240000, C502S255000, C502S263000, C502S305000, C502S313000, C502S314000, C502S315000, C502S316000, C502S321000, C502S322000, C502S349000, C502S350000, C502S415000, C502S439000
Reexamination Certificate
active
11079038
ABSTRACT:
A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula:in-line-formulae description="In-line Formulae" end="lead"?Mo12BiaWbFecCodNieSbfCsgMghZniPjOxin-line-formulae description="In-line Formulae" end="tail"?wherein a is 0.1 to 1.5, b is 0 to 4, c is 0.2 to 5.0, d is 0 to 9, e is 0 to 9, f is 0 to 2.0, g is from 0.4 to 1.5, h is 0 to 1.5, i is 0 to 2.0, j is 0 to 0.5 and x is determined by the valences of the other components, c:g=3.3–5.0, c:a=2.0–6.0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0.95–1.10.
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Kauffman James W.
Ledford John S.
Liang Wugeng
Linzer Joseph R.
Stevenson Scott A.
Nguyen Cam N.
Saudi Basic Industries Corporation
Wheelington Jim
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