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US 5,510,523 AGranted
Process for the preparation of acetic acid
AssigneeTokyo Gas Co., Ltd.
InventorsKenichi Yamaseki, Yasuo Konishi, Hiroshi Uchida
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AssigneeTokyo Gas Co., Ltd.
InventorsKenichi Yamaseki, Yasuo Konishi, Hiroshi Uchida
Estimating the term…
A process for preparing acetic acid from methanol and carbon monoxide or a mixed gas of carbon monoxide with hydrogen, which process comprises contacting methanol with a gaseous component selected from a group consisting of carbon monoxide and a mixed gas of carbon monoxide with hydrogen of 2% by volume or less in the presence of a carbon-supported rhodium metal catalyst and methyl iodide promoter in vapor phase under the conditions of a reaction temperature of 180.degree.-220.degree. C., a reaction pressure of 5-10 kg/cm.sup.2 .multidot.G, and a weight of catalyst to feed gas flow rate ratio (W/F) of 10-20 g.multidot.h/mole; and a process for preparing acetic acid from methanol and carbon monoxide, which process comprises contacting methanol with carbon monoxide in the presence of a carbon-supported rhodium metal catalyst, methyl iodide promoter and water in vapor phase.
A process for preparing acetic acid from methanol and carbon monoxide, which process comprises:
A process for preparing acetic acid by contacting methanol and a carbon monoxide component in the presence of a carbon-supported rhodium catalyst, which process consists of contacting methanol with the carbon monoxide component which is a mixed gas of carbon monoxide with hydrogen of 2% by volume or less, in the presence of the carbon-supported rhodium metal catalyst and a methyl iodide promoter in the vapor phase, under the conditions of a reaction temperature of 180.degree.-220.degree. C., a reaction pressure of 5-10 kg/cm.sub.2 .multidot.G, and a weight of catalyst to feed gas flow ratio (W/F) of 10-20 g.multidot.h/mole, the mixed gas of carbon monoxide with hydrogen of 2% by volume or less being obtained by subjecting a mixed gas of carbon monoxide with high content hydrogen to a catalytic methanation reaction in the presence of a catalyst prepared by supporting a metal belonging to platinum group on a heat-resistant support, the mixed gas of carbon monoxide with high content hydrogen containing 5 to 75% by volume of hydrogen.
A process for preparing acetic acid by contacting methanol and a carbon monoxide component in the presence of a carbon-supported rhodium catalyst, which process consists of contacting methanol with the carbon monoxide component which is a mixed gas of carbon monoxide with hydrogen of 2% by volume or less, in the presence of the carbon-supported rhodium metal catalyst and a methyl iodide promoter in the vapor phase, under the conditions of a reaction temperature of 180.degree.-220.degree. C., a reaction pressure of 5-10 kg/cm.sup.2 .multidot.G, and a weight of catalyst to feed gas flow ratio (W/F) of 10-20 g.multidot.h/mole, the mixed gas of carbon monoxide with hydrogen of 2% by volume or less being obtained by subjecting a mixed gas of carbon monoxide with high content hydrogen to a catalytic methanation reaction in the presence of a catalyst prepared supporting a metal belonging to platinum group on a heat-resistant support, the mixed gas of carbon monoxide with high content hydrogen being a synthesis gas.
Dependencies are inferred from the claim text.