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

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