Method of starting-up a process of producing an alkylene oxide using a high-efficiency catalyst
First Claim
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1. A method for starting-up an alkylene oxide production process, the alkylene oxide production process comprising reacting a feed gas comprising an alkylene, oxygen, and at least one organic chloride over a high efficiency silver catalyst to yield a reaction product comprising the alkylene oxide, the start-up method comprising:
- providing a feed gas comprising the alkylene, oxygen, and the at least one organic chloride, wherein the feed gas has an overall chloriding effectiveness represented by the formula;
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Abstract
A method for starting-up a high efficiency alkylene oxide catalyst is described. A feed gas comprising an alkylene, oxygen, and at least one organic chloride is introduced to the catalyst. The molar ratio of oxygen to alkylene, reaction temperature, and overall chloriding effectiveness are adjusted to specified ranges of values within a specified catalyst aging period.
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15 Claims
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1. A method for starting-up an alkylene oxide production process, the alkylene oxide production process comprising reacting a feed gas comprising an alkylene, oxygen, and at least one organic chloride over a high efficiency silver catalyst to yield a reaction product comprising the alkylene oxide, the start-up method comprising:
providing a feed gas comprising the alkylene, oxygen, and the at least one organic chloride, wherein the feed gas has an overall chloriding effectiveness represented by the formula; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for producing an alkylene oxide by reacting an alkylene, oxygen, and at least one organic chloride over a high efficiency silver catalyst, the method comprising:
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reacting a feed gas comprising the alkylene, oxygen, and at least one organic chloride over the high-efficiency silver catalyst at a reaction temperature and an overall chloriding effectiveness to yield a reaction product comprising the alkylene oxide such that the process has a molar ratio of oxygen to the alkylene in the feed gas and a first efficiency to the alkylene oxide, the first efficiency to the alkylene oxide being less than a target efficiency to the alkylene oxide; adjusting at least one process parameter such that the efficiency of the process to the alkylene oxide increases from the first efficiency to a second efficiency, wherein the at least one process parameter is selected from the group consisting of the molar ratio of oxygen to the alkylene in the feed gas, reactor temperature, and overall chloriding effectiveness, following the adjusting step the molar ratio of oxygen to the alkylene in the feed gas is at least 0.2, the reaction temperature is from 215°
C. to 240°
C., the overall chloriding effectiveness is represented as Z* and is from 1.0 to 5.0, and Z* is represented as follows; - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification