PROCESS FOR PREPARING AN EPOXIDATION CATALYST
A process for preparing a silver-containing catalyst for the selective oxidation of ethylene to ethylene oxide including the steps of: (a) providing a multimodal support, (b) preparing an impregnation solution comprising a silver component, (c) impregnating, at least once, the multimodal support of...
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Format | Patent |
Language | English French |
Published |
08.03.2018
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Abstract | A process for preparing a silver-containing catalyst for the selective oxidation of ethylene to ethylene oxide including the steps of: (a) providing a multimodal support, (b) preparing an impregnation solution comprising a silver component, (c) impregnating, at least once, the multimodal support of step (a) with the silver-containing impregnation solution of step (b) to form an impregnated support; (d) subjecting the impregnated multimodal support from step (c) to a removal means, such as a centrifuge, at least once, for a time sufficient to remove impregnated silver impregnation solution from the multimodal support and to control the amount of silver in the pores of the multimodal support by selectively removing impregnated silver impregnation solution from a set of larger pores in the multimodal support; (e) roasting, at least once, the multimodal support after the step (d); (f) optionally, repeating the impregnation step (c), (g) optionally, repeating the centrifugation step (d), and (h) optionally, repeating the calcination step (e).
Un procédé de préparation d'un catalyseur contenant de l'argent pour l'oxydation sélective de l'éthylène en oxyde d'éthylène comprend les étapes consistant à : (a) fournir un support multimodal, (b) préparer une solution d'imprégnation comprenant un composant d'argent, (c) imprégner, au moins une fois, le support multimodal de l'étape (a) avec la solution d'imprégnation contenant de l'argent de l'étape (b) pour former un support imprégné; (d) soumettre le support multimodal imprégné de l'étape (c) à un moyen d'enlèvement, tel qu'une centrifugeuse, au moins une fois, pendant une durée suffisante pour éliminer la solution d'imprégnation d'argent imprégnée du support multimodal et pour contrôler la quantité d'argent dans les pores du support multimodal par élimination sélective d'une solution d'imprégnation d'argent imprégnée d'un ensemble de pores plus grands dans le support multimodal; (e) rôtir, au moins une fois, le support multimodal après l'étape (d); (f) éventuellement, répéter l'étape d'imprégnation (c), (g) éventuellement, répéter l'étape de centrifugation (d), et (h) éventuellement, répéter l'étape de calcination (e). |
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AbstractList | A process for preparing a silver-containing catalyst for the selective oxidation of ethylene to ethylene oxide including the steps of: (a) providing a multimodal support, (b) preparing an impregnation solution comprising a silver component, (c) impregnating, at least once, the multimodal support of step (a) with the silver-containing impregnation solution of step (b) to form an impregnated support; (d) subjecting the impregnated multimodal support from step (c) to a removal means, such as a centrifuge, at least once, for a time sufficient to remove impregnated silver impregnation solution from the multimodal support and to control the amount of silver in the pores of the multimodal support by selectively removing impregnated silver impregnation solution from a set of larger pores in the multimodal support; (e) roasting, at least once, the multimodal support after the step (d); (f) optionally, repeating the impregnation step (c), (g) optionally, repeating the centrifugation step (d), and (h) optionally, repeating the calcination step (e).
Un procédé de préparation d'un catalyseur contenant de l'argent pour l'oxydation sélective de l'éthylène en oxyde d'éthylène comprend les étapes consistant à : (a) fournir un support multimodal, (b) préparer une solution d'imprégnation comprenant un composant d'argent, (c) imprégner, au moins une fois, le support multimodal de l'étape (a) avec la solution d'imprégnation contenant de l'argent de l'étape (b) pour former un support imprégné; (d) soumettre le support multimodal imprégné de l'étape (c) à un moyen d'enlèvement, tel qu'une centrifugeuse, au moins une fois, pendant une durée suffisante pour éliminer la solution d'imprégnation d'argent imprégnée du support multimodal et pour contrôler la quantité d'argent dans les pores du support multimodal par élimination sélective d'une solution d'imprégnation d'argent imprégnée d'un ensemble de pores plus grands dans le support multimodal; (e) rôtir, au moins une fois, le support multimodal après l'étape (d); (f) éventuellement, répéter l'étape d'imprégnation (c), (g) éventuellement, répéter l'étape de centrifugation (d), et (h) éventuellement, répéter l'étape de calcination (e). |
Author | SYED, MOHMED A SANTOS CASTRO, VERA P MCKEEN, JOHN C TWAY, CATHY L TODD, CLIFFORD S KULKARNI, APOORVA SUSSMAN, VICTOR J |
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Title | PROCESS FOR PREPARING AN EPOXIDATION CATALYST |
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