公开(公告)号：US10821430B2

公开(公告)日：2020-11-03

申请号：US16328033

申请日：2017-08-30

Applicant: Dow Technology Investments LLC

Inventor： Mohmed A. Syed ,  Apoorva Kulkarni ,  Vera P. Santos Castro ,  Victor J. Sussman ,  John C. McKeen ,  Cathy L. Tway ,  Clifford S. Todd

IPC: B01J37/02 ,  B01J23/50 ,  B01J37/00 ,  C07C213/04 ,  C07D301/10 ,  C07D317/36 ,  C07C215/08 ,  C07D317/04 ,  B01J21/04 ,  B01J35/10 ,  B01J37/08 ,  C07C29/00 ,  C07C41/02 ,  C07C68/00 ,  C07C213/00 ,  C07D301/03

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).

公开(公告)号：US20220097028A1

公开(公告)日：2022-03-31

申请号：US17034410

申请日：2020-09-28

Applicant: Dow Technology Investments LLC

Inventor： Mohmed A. Syed ,  Apoorva Kulkarni ,  Vera P. Santos Castro ,  Victor J. Sussman ,  John C. Mckeen ,  Cathy L. Tway ,  Clifford S. Todd

IPC: B01J23/50 ,  B01J37/02 ,  B01J37/14 ,  C07D301/10 ,  C07D303/04 ,  B01J21/04

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).

公开(公告)号：US20190184387A1

公开(公告)日：2019-06-20

申请号：US16328033

申请日：2017-08-30

Applicant: Dow Technology Investments LLC

Inventor： Mohmed A. Syed ,  Apoorva Kulkarni ,  Vera P. Santos Castro ,  Victor J. Sussman ,  John C. McKeen ,  Cathy L. Tway ,  Clifford S. Todd

IPC: B01J37/02 ,  B01J23/50 ,  B01J37/00 ,  B01J21/04 ,  B01J37/08 ,  B01J35/10 ,  C07D301/03 ,  C07C68/00 ,  C07C213/00 ,  C07C41/02 ,  C07C29/00

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).