Production of ethylene oxide and catalysts therefor
First Claim
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1. A process for producing ethylene oxide which comprises contacting ethylene and oxygen in the presence of a reaction modifier selected from chlorine-substituted C1-6 hydrocarbons, with a catalyst which comprises silver supported on a porous heat resisting support, a group VI A transition metal, namely chromium, molybdenum and/or tungsten, an alkali metal selected from potassium, rubidium and cesium and sulphur which catalyst is free from rhenium.
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Abstract
Catalysts of attractive activities for use in the oxidation of ethylene to ethylene oxide comprise silver supported on a porous heat resisting support, a group VI A transition metal, potassium, rubidium and/or cesium and sulphur.
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Citations
4 Claims
- 1. A process for producing ethylene oxide which comprises contacting ethylene and oxygen in the presence of a reaction modifier selected from chlorine-substituted C1-6 hydrocarbons, with a catalyst which comprises silver supported on a porous heat resisting support, a group VI A transition metal, namely chromium, molybdenum and/or tungsten, an alkali metal selected from potassium, rubidium and cesium and sulphur which catalyst is free from rhenium.
- 2. A process of producing ethylene oxide which comprises contacting ethylene and oxygen in the presence of a reaction modifier selected from chlorine-substituted C1-6 hydrocarbons with a catalyst which consists of silver supported on a porous heat resisting support, a group VI A transition metal selected from the group consisting of chromium, molybdenum, and tungsten, an alkali metal selected from potassium, rubidium and cesium, and sulphur, said catalyst including 3 to 50% by weight of silver and 0.1 to 5 gram atoms of the transition metal, 0.1 to 10 gram atoms of sulphur and 0.1 to 15 gram atoms of the alkali metal per million grams of catalyst.
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Current AssigneeDow Technology Investments LLC (Dow, Inc.)
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Original AssigneeImperial Chemical Industries PLC (Nouryon BV)
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InventorsHayden, Percy, Pinnegar, Harry
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Primary Examiner(s)Ivy, C. Warren
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Assistant Examiner(s)Trinh, Ba K.
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Application NumberUS07/653,952Time in Patent Office406 DaysField of Search549/536US Class Current549/536CPC Class CodesB01J 23/50 SilverB01J 23/683 with chromium, molybdenum o...C07D 301/10 with catalysts containing s...Y02P 20/52 using catalysts, e.g. selec...
