Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1980-12-29
1983-09-13
Garner, Vivian
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
252435, 252437, 252477R, 2604653, 260696, 549258, 549260, 549262, 562412, 562415, 562532, 562534, 562535, 562536, 562538, 562548, 568400, 568401, 568471, 568474, 568477, 568478, 568479, 568480, 585443, 585445, C07C 5125, C07C 5705, C07C 4535, C07C 4722
Patent
active
044043970
ABSTRACT:
A stabilized heteropoly molybdate catalyst precursor in calcined form and containing anionic molybdenum in defect state is surface impregnated with certain metal cations. The stabilized precursor is one obtained by incorporating into the reaction product of a molybdate and a soluble phosphate, silicate or arsenate, an aqueous chloride ion and a compound of phosphotungstate, silicotungstate, vanadium arsenate, silico-arsenate, phosphovanadate, or silicovanadate, followed by drying and calcining. During the chloride ion stabilization step other metals may be optionally incorporated in forming the stabilized precursor.
The obtained precursor is catalytically active in the conversion of the unsaturated aldehydes to the corresponding unsaturated carboxylic acids with or without incorporation of the metal cation during the chloride ion stabilization step. When the obtained calcined precursor is surface impregnated with a Group VIII metal cation, preferably cobalt and/or iron, and with a compound of selenium or tellurium, the resulting catalysts are highly active and are capable of direct conversion of C.sub.3 -C.sub.4 monoolefins in a single step to the corresponding unsaturated carboxylic acids.
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Air Products and Chemicals Inc.
Dannells, Jr. Richard A.
Garner Vivian
Innis E. Eugene
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