公开(公告)号：WO2019022886A1

公开(公告)日：2019-01-31

申请号：PCT/US2018/039231

申请日：2018-06-25

Applicant: ROHM AND HAAS COMPANY ,  DOW GLOBAL TECHNOLOGIES LLC ,  DOW HYDROCARBONS AND RESOURCES LLC

Inventor： KRAPTCHETOV, Dmitri A. ,  LIMBACH, Kirk W.. ,  HICKMAN, Daniel A. ,  HERRON, Jeffrey ,  OLSON, Kurt W. ,  BLAYLOCK, D. Wayne

IPC: C07C67/39 ,  C07C69/54 ,  B01J8/22

Abstract: A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting in a tubular reactor having at least four zones a mixture comprising methacrolein, methanol, oxygen and a base with a catalyst bed of heterogeneous catalyst comprising a support and a noble metal, wherein reaction zones comprising catalyst beds alternate with mixing zones not comprising catalyst beds.

公开(公告)号：WO2019060192A1

公开(公告)日：2019-03-28

申请号：PCT/US2018/050598

申请日：2018-09-12

Applicant: DOW GLOBAL TECHNOLOGIES LLC ,  DOW HYDROCARBONS AND RESOURCES LLC ,  ROHM AND HAAS COMPANY

Inventor： HERRON, Jeffrey ,  ARRIOLA, Daniel J. ,  BLAYLOCK, D. Wayne ,  LEE, Wen-Sheng ,  SUSSMAN, Victor J. ,  HICKMAN, Daniel A. ,  LIMBACH, Kirk W.

IPC: C07C67/39 ,  C07C69/54 ,  B01J23/44 ,  B01J23/52

Abstract: A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a noble metal, wherein oxygen concentration at a reactor outlet is from 1 to 7.5 mol% and wherein pH at a reactor outlet is no greater than 7.5.

公开(公告)号：WO2019022888A1

公开(公告)日：2019-01-31

申请号：PCT/US2018/039235

申请日：2018-06-25

Applicant: ROHM AND HAAS COMPANY ,  DOW GLOBAL TECHNOLOGIES LLC ,  DOW HYDROCARBONS AND RESOURCES LLC

Inventor： LIMBACH, Kirk W.. ,  KRAPTCHETOV, Dmitri A. ,  FRICK, Christopher D. ,  HICKMAN, Daniel A. ,  HERRON, Jeffrey ,  OLSON, Kurt D. ,  BLAYLOCK, D. Wayne ,  SUSSMAN, Victor J. ,  LEE, Wen-Sheng

IPC: C07C67/39 ,  C07C69/54 ,  B01J23/52 ,  B01J35/00

Abstract: A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a noble metal, wherein said catalyst has an average diameter of at least 200 microns and at least 90 wt% of the noble metal is in the outer 70% of catalyst volume, and wherein oxygen concentration at a reactor outlet is from 0.5 to 7.5 mol%.

公开(公告)号：WO2019022885A1

公开(公告)日：2019-01-31

申请号：PCT/US2018/039230

申请日：2018-06-25

Applicant: DOW GLOBAL TECHNOLOGIES LLC ,  DOW HYDROCARBONS AND RESOURCES LLC

Inventor： SUSSMAN, Victor J. ,  LEE, Wen-Sheng ,  HERRON, Jeffrey ,  BLAYLOCK, D. Wayne ,  ARRIOLA, Daniel J. ,  HEITSCH, Andrew ,  KIRILIN, Alexey ,  CLEMENTS, Heidi ,  SCHMUCKER, Abrin L. ,  HICKMAN, Daniel A.

IPC: B01J37/02 ,  B01J23/52 ,  C07C67/39 ,  C07C69/54

Abstract: A method for preparing a heterogeneous catalyst. The method comprises steps of: (a) combining (i) a support, (ii) an aqueous solution of a noble metal compound and (iii) a C 2 -C 18 thiol comprising at least one hydroxyl or carboxylic acid substituent; to form a wet particle and (b) removing water from the wet particle by drying followed by calcination to produce the catalyst.

公开(公告)号：CA3075083A1

公开(公告)日：2019-03-28

申请号：CA3075083

申请日：2018-09-12

Applicant: DOW GLOBAL TECHNOLOGIES LLC ,  DOW HYDROCARBONS AND RESOURCES LLC ,  ROHM & HAAS

Inventor： HERRON JEFFREY ,  ARRIOLA DANIEL J ,  BLAYLOCK D WAYNE ,  LEE WEN-SHENG ,  SUSSMAN VICTOR J ,  HICKMAN DANIEL A ,  LIMBACH KIRK W

IPC: C07C67/39 ,  B01J23/44 ,  B01J23/52 ,  B01J35/00 ,  C07C69/54

Abstract: A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a noble metal, wherein oxygen concentration at a reactor outlet is from 1 to 7.5 mol% and wherein pH at a reactor outlet is no greater than 7.5.