摘要:
A process for the in-situ regeneration of a zeolite catalyst in a carbonylation process for the production of at least one of methyl acetate and acetic acid by contacting methanol, dimethyl ethyl or dimethyl carbonate with carbon monoxide in the presence of a zeolite catalyst, ceasing contact of the catalyst with the reactant, regenerating the catalyst with a regenerating gas selected from hydrogen or a mixture of hydrogen and carbon monoxide at a temperature in the range 250 to 600° C., terminating the hydrogen regenerating step and resuming contact of the catalyst with the reactant and carbon monoxide.
摘要:
Process for the in-situ regeneration of a zeolite catalyst in a carbonylation process for the production of at least one of methyl acetate and acetic acid. The process is carried out by (a) contacting a carbonylatable reactant selected from methanol, dimethyl ether and dimethyl carbonate and carbon monoxide in a reactor with a zeolite catalyst and recovering a product stream containing at least one of methyl acetate and acetic acid from the reactor, (b) ceasing contact of the catalyst with the carbonylatable reactant, (c) regenerating the catalyst with a regenerating gas selected from hydrogen or a mixture of hydrogen and carbon monoxide at a temperature in the range 250 to 600 C, and (d) terminating the hydrogen regenerating step and resuming contact of the catalyst with the carbonylatable reactant and carbon monoxide.
摘要:
A process for the carbonylation of dimethyl ether, dimethyl carbonate and/or methanol with carbon monoxide and hydrogen in the presence of a mordenite catalyst to produce at least one of acetic acid and methyl acetate in which process the mordenite catalyst is regenerated in-situ by contacting the catalyst with a regenerating gas comprising a molecular oxygen-containing gas and an inert diluent at a total pressure in the range 1 to 100 bar and wherein the partial pressure of the molecular oxygen-containing gas is such that the temperature of the catalyst is maintained within the range 225 to 325° C.
摘要:
A process for the carbonylation of dimethyl ether, dimethyl carbonate and/or methanol with carbon monoxide and hydrogen in the presence of a mordenite catalyst to produce at least one of acetic acid and methyl acetate in which process the mordenite catalyst is regenerated in-situ by contacting the catalyst with a regenerating gas comprising a molecular oxygen-containing gas and an inert diluent at a total pressure in the range 1 to 100 bar and wherein the partial pressure of the molecular oxygen-containing gas is such that the temperature of the catalyst is maintained within the range 225 to 325° C.
摘要:
Process for the production of methyl acetate by carbonylating a dimethyl ether feed with carbon monoxide under substantially anhydrous conditions, in the presence of a zeolite catalyst effective for the carbonylation. The carbonylation is carried out at a temperature in the range of 275 to 350° C. and in the presence of hydrogen.
摘要:
Production of methyl acetate by carbonylating a dimethyl ether feed with carbon monoxide under substantially anhydrous conditions, in the presence of a zeolite catalyst at a temperature in the range 240° C. to 350° C. and in the presence of hydrogen.
摘要:
Process for the carbonylation of a carbonylatable reactant selected from at least one of dimethyl ether and methanol, by carbonylating the carbonylatable reactant with carbon monoxide in the presence of a catalyst to produce a carbonylation product selected from at least one of methyl acetate and acetic acid. The catalyst is formed by compositing a mordenite loaded with at least one of silver and copper, with an inorganic oxide binder.
摘要:
Process for the manufacture of methyl acetate by carbonylating a carbonylatable reactant selected from dimethyl ether and dimethyl carbonate containing less than 2.5 wt % water with carbon monoxide in the presence of a mordenite catalyst. The mordenite has been ion-exchanged with at least one Group IB metal, and the molar ratio of the Group IB metal to total aluminum present in the mordenite is in the range 5 to 50 mol %.
摘要:
A process for the manufacture of methyl acetate by the carbonylation of dimethyl ether or dimethyl carbonate with carbon monoxide under substantially anhydrous conditions in the presence of a Group TB metal loaded mordenite catalyst prepared by ion-exchanging mordenite with at least one Group IB metal, the ion-exchanged mordenite having a molar ratio of the Group IB metal to total aluminium present in the mordenite in the range 5 to 50 mol %.
摘要:
A process for the production of acetic acid comprises (1) continuously feeding methanol and/or a reactive derivative thereof and carbon monoxide to a carbonylation reactor containing a liquid reaction composition comprising an iridium carbonylation catalyst, methyl iodide co-catalyst, a finite concentration of water, acetic acid, methyl acetate and, optionally at least one promoter, (2) carbonylating the methanol and/or reactive derivative thereof with the carbon monoxide in the liquid reaction composition to produce acetic acid; and (3) recovering acetic acid from the liquid reaction composition, there being continuously maintained (a) in the liquid reaction composition water at a concentration of no greater than 4.5% by weight, and (b) in the reactor a carbon monoxide partial pressure in the range from greater than 0 to 7.5 bar.