Process for preparing a rejuvenated epoxidation catalyst
AssigneeShell Oil Company
InventorsWayne EVANS, Marek Matusz
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Abstract
A process for preparing a rejuvenated epoxidation catalyst, for the epoxidation of one or more olefins using the rejuvenated epoxidation catalyst to produce olefin oxide, and for the production of a 1,2-diol, a 1,2-diol ether, or an alkanol amine from the olefin oxide, the process comprising: providing a quantity of spent epoxidation catalyst having a cumulative alkylene oxide production of 0.16 kT/m3 of the spent epoxidation catalyst or more; and, depositing additional silver on the spent epoxidation catalyst in an amount of 0.2% w or more, based on the weight of the spent epoxidation catalyst.
Claims35
A process for preparing a rejuvenated epoxidation catalyst, the process comprising:
- providing a quantity of spent epoxidation catalyst having a cumulative alkylene oxide production of 0.16 kT/m3 of the spent epoxidation catalyst or more;
- and,
- depositing additional silver on the spent epoxidation catalyst in an amount of 0.2% w or more, based on the weight of the spent epoxidation catalyst.
A process of preparing rejuvenated epoxidation catalyst, the process comprising:
- providing a quantity of spent epoxidation catalyst having a cumulative alkylene oxide production of 0.16 kT/m3 of the spent epoxidation catalyst or more;
- depositing on the spent epoxidation catalyst:
- additional silver in an amount of 0.2% w or more, based on the weight of the spent epoxidation catalyst;
- a quantity of rejuvenating rhenium;
- a quantity of one or more rejuvenating copromoter components comprising an element selected from the group consisting of tungsten, chromium, molybdenum, sulfur, phosphorus, boron, and mixtures thereof;
- and,
- a quantity of one or more rejuvenating further elements comprising one or more alkali metals selected from the group consisting of lithium, potassium, cesium, and mixtures thereof.
A process for the epoxidation of one or more olefins using rejuvenated epoxidation catalyst, the process comprising:
- providing a quantity of spent epoxidation catalyst having a cumulative alkylene oxide production of 0.16 kT/m3 of the spent epoxidation catalyst or more;
- depositing additional silver on the spent epoxidation catalyst in an amount of 0.2% w or more, based on the weight of the spent epoxidation catalyst;
- and
- reacting a feed comprising the one or more olefins and oxygen in the presence of the rejuvenated epoxidation catalyst to produce olefin oxide.
Dependencies are inferred from the claim text.