Process for preparing acetic anhydride
AssigneeHoechst Aktiengesellschaft
InventorHerbert Kuckertz
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Abstract
Process for preparing acetic anhydride from acetic acid methyl ester and carbon monoxide in the presence of catalysts containing noble metals of the 8.sup.th sub-group of the periodic table or their compounds as well as iodine and/or iodine compounds.
Claims11
A process for the preparation of acetic anhydride which comprises reacting a mixture consisting essentially of acetic acid methyl ester and carbon monoxide at a pressure of 1 to 500 bar and at temperature of from 50 to 250.degree. C and carrying out said reaction in the presence of a catalyst containing a noble metal of the 8th subgroup of the Periodic Table.
A process for the preparation of acetic anhydride which comprises reacting a mixture consisting essentially of acetic acid methyl ester and carbon monoxide at a temperature of about 120.degree. to 200.degree. C and a pressure of up to 200 bar and carrying out said reaction in the presence of a catalyst which contains a noble metal of the eighth subgroup of the Periodic Table.
Dependencies are inferred from the claim text.