Process for the production of ethylidene diacetate from dimethyl ether using a heterogeneous catalyst

Patent · Tue Apr 28 00:00:00 EDT 1998

OSTI ID:871506

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

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1. Allentown, PA

This invention relates to a process for producing ethylidene diacetate by the reaction of dimethyl ether, acetic acid, hydrogen and carbon monoxide at elevated temperatures and pressures in the presence of an alkyl halide and a heterogeneous, bifunctional catalyst that is stable to hydrogenation and comprises an insoluble polymer having pendant quaternized heteroatoms, some of which heteroatoms are ionically bonded to anionic Group VIII metal complexes, the remainder of the heteroatoms 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 3 consecutive runs without loss in activity.

• 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 5744636
• OSTI ID: 871506
• Country of Publication: United States
• Language: English

Related Subjects

/999/
accelerator
acetic
acetic acid
achieve
acid
activity
alkyl
alkyl halide
anionic
bifunctional
bifunctional catalyst
bonded
carbon
carbon monoxide
catalyst
catalytic
catalytic reaction
complexes
comprises
consecutive
contrast
diacetate
dimethyl
easily
easily separated
elevated
elevated temperature
elevated temperatures
ethylidene
ethylidene diacetate
filtration
halide
heteroatoms
heterogeneous
heterogeneous catalyst
hydrogen
hydrogenation
insoluble
insoluble polymer
iodide
ionically
ionically bonded
loss
metal
metal complex
metal complexes
monoxide
pendant
pendant quaternized
polymer
presence
pressures
prior
process
processes
producing
producing ethylidene
production
products
promoter
quaternized
reaction
recycled
relates
remainder
runs
separated
soluble poly
soluble polymer
stable
temperatures
viii
viii metal