Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2007-09-25
2007-09-25
Richter, Johann (Department: 1621)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S240000, C502S241000, C502S242000, C502S243000, C502S245000, C502S246000, C502S247000, C502S248000, C502S250000, C502S263000, C502S302000
Reexamination Certificate
active
11316211
ABSTRACT:
The invention is a supported or bound heteropoly acid catalyst composition, a method of making the catalyst composition and a process for the oxidation of saturated and/or unsaturated aldehydes to unsaturated carboxylic acids using the catalyst composition. The catalyst composition has an active heteropoly acid component containing molybdenum, vanadium, phosphorus and cesium and an inert heteropoly acid component containing molybdenum, phosphorus and cesium, potassium, rubidium or sodium at a relative molybdenum:cesium/potassium/rubidium/sodium molar ratio of above about 12:2.The catalyst is made by dissolving compounds of the components of each of the heteropoly acid compounds in a solution, precipitating the heteropoly acid compounds, contacting the heteropoly acid compounds to form a catalyst precursor and calcining the catalyst precursor to form a heteropoly acid compound catalyst.Unsaturated aldehydes, such as methacrolein, may be oxidized in the presence of the heteropoly acid compound catalyst to produce an unsaturated carboxylic acid, such as methacrylic acid.
REFERENCES:
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Liang Wugeng
Linzer Joseph R.
Stevenson Scott A.
Nwaonicha Chukwuma
Richter Johann
Saudi Basic Industries Corporation
Wheelington Jim P.
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