Heterogeneous catalyst for the production of acetic anhydride from methyl acetate

Patent · Thu Dec 31 23:00:00 EST 1998

OSTI ID:872244

Ramprasad, Dorai ^[1]; Waller, Francis Joseph ^[1]

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1. Allentown, PA

This invention relates to a process for producing acetic anhydride by the reaction of methyl acetate, carbon monoxide, and hydrogen at elevated temperatures and pressures in the presence of an alkyl halide and a heterogeneous, bifunctional catalyst that contains an insoluble polymer having pendant quaternized phosphine groups, some of which phosphine groups are ionically bonded to anionic Group VIII metal complexes, the remainder of the phosphine groups being bonded to iodide. In contrast to prior art processes, no accelerator (promoter) is necessary to achieve the catalytic reaction and the products are easily separated from the catalyst by filtration. The catalyst can be recycled for consecutive runs without loss in activity. Bifunctional catalysts for use in carbonylating dimethyl ether are also provided.

• Research Organization: Air Products and Chemicals, Inc. (Allentown, PA)
• DOE Contract Number: FC22-95PC93052
• Assignee: Air Products and Chemicals, Inc. (Allentown, PA)
• Patent Number(s): US 5892110
• OSTI ID: 872244
• Country of Publication: United States
• Language: English

Related Subjects

/999/
accelerator
acetate
acetic
acetic anhydride
achieve
activity
alkyl
alkyl halide
anhydride
anionic
bifunctional
bifunctional catalyst
bonded
carbon
carbon monoxide
carbonylating
catalyst
catalysts
catalytic
catalytic reaction
complexes
consecutive
contains
contrast
dimethyl
easily
easily separated
elevated
elevated temperature
elevated temperatures
ethyl acetate
filtration
halide
heterogeneous
heterogeneous catalyst
hydrogen
insoluble
insoluble polymer
iodide
ionically
ionically bonded
loss
metal
metal complex
metal complexes
methyl
methyl acetate
monoxide
pendant
pendant quaternized
phosphine
polymer
presence
pressures
prior
process
processes
producing
production
products
promoter
provided
quaternized
reaction
recycled
relates
remainder
runs
separated
soluble poly
soluble polymer
temperatures
viii
viii metal