Celanese International Corporation

Deborah R Repman

Victor J Johnston

Josefina T Chapman

James H Zink

Laiyuan Chen

Barbara F Kimmich

Jan Cornelis Van Der Waal

Virginie Zuzaniuk

Barabra Kimmich

This invention provides an integrated two stage economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethylene either in a single reactor zone or in a dual rector zone wherein the intermediate hydrogenated products are either dehydrated and/or cracked to form ethylene. In a subsequent second stage so formed ethylene is reacted with molecular oxygen and acetic acid over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over a hydrogenation catalyst and subsequent reaction over a dehydration catalyst selectively produces ethylene, which is further mixed with acetic acid and molecular oxygen and reacted over a supported palladium/gold/potassium catalyst.

Integrated process for the production of vinyl acetate from acetic acid via ethylene

A process for the selective production of ethyl acetate by vapor phase reaction of acetic acid over a hydrogenating catalyst composition to form ethyl acetate is disclosed and claimed. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and copper supported on silica selectively produces ethyl acetate in a vapor phase at a temperature of about 250&#xb0; C.

Direct and selective production of ethyl acetate from acetic acid utilizing a bimetal supported catalyst

This invention provides an integrated three step economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethyl acetate which is cracked to form ethylene and acetic acid in the second step and in a subsequent step so formed ethylene and acetic acid is reacted with molecular oxygen over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and copper supported on silica selectively produces ethyl acetate in a vapor phase at a temperature of about 250&#xb0; C., which is cracked over a NAFION catalyst to form ethylene and acetic acid at a temperature of about 185&#xb0; C., which is mixed with molecular oxygen and reacted over a palladium/gold/potassium catalyst supported on titania to form VAM at a temperature of about 150&#xb0; C. to 170&#xb0; C.

Integrated process for the production of vinyl acetate from acetic acid via ethyl acetate

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Lake Jackson, TX, United States of America

Deborah R Repman