公开(公告)号：US11498057B2

公开(公告)日：2022-11-15

申请号：US17252886

申请日：2019-06-20

Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

Inventor： Kirk W. Limbach ,  Christopher D. Frick ,  Dmitry A. Krapchetov ,  Wen-Sheng Lee ,  Victor J. Sussman ,  Jeffrey A. Herron

IPC: B01J23/52 ,  B01J21/06 ,  B01J21/08 ,  B01J35/00 ,  B01J35/02 ,  C07C67/44

Abstract: A heterogeneous catalyst comprising a support and gold, wherein: (i) said support comprises titanium, (ii) said catalyst comprises from 0.1 to 5 wt % of gold, (iii) at least 90 wt % of the gold is in the outer 60% of catalyst volume, and (iv) particles of the catalyst have an average diameter from 200 microns to 30 mm; wherein weight percentages are based on weight of the catalyst.

公开(公告)号：US10829432B2

公开(公告)日：2020-11-10

申请号：US16634408

申请日：2018-06-25

Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

Inventor： Kirk W. Limbach ,  Dmitry A. Krapchetov ,  Christopher D. Frick ,  Daniel A. Hickman ,  Jeffrey Herron ,  Kurt D. Olson ,  D. Wayne Blaylock ,  Victor Sussman ,  Wen-Sheng Lee

IPC: C07C67/39 ,  B01J21/04 ,  B01J23/44 ,  B01J23/52 ,  B01J35/00 ,  B01J35/02

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：US20200157036A1

公开(公告)日：2020-05-21

申请号：US16632560

申请日：2018-06-25

Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

Inventor： Dmitry A. Krapchetov ,  James Elder ,  William G. Worley ,  Kirk W. Limbach ,  Daniel A. Hickman ,  Alexey Kirilin ,  Wen Sheng Lee ,  Victor Sussman

IPC: C07C67/44 ,  B01J37/02 ,  B01J35/08 ,  B01J21/04 ,  B01J35/00 ,  B01J21/06 ,  B01J23/52 ,  B01J35/02

Abstract: A method for preparing methyl methacrylate from methacrolein and methanol; said method comprising contacting in a reactor a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a noble metal, wherein pH at the reactor outlet is from 3 to 6.7.

公开(公告)号：US20200157032A1

公开(公告)日：2020-05-21

申请号：US16616116

申请日：2018-05-24

Applicant: Rohm and Haas Company

Inventor： Reetam Chakrabarti ,  Dmitry A. Krapchetov ,  Mark A. Silvano ,  Jinsuo Xu

IPC: C07C45/75 ,  C07C45/82 ,  C07C45/49 ,  C07C57/04 ,  C07C51/25 ,  C07C47/22

Abstract: Provided is a process for preparing methacrolein which maximizes capture of methanol. Also provided are processes for producing methacrylic acid and methyl methacrylate.

公开(公告)号：US20200140363A1

公开(公告)日：2020-05-07

申请号：US16615841

申请日：2018-05-24

Applicant: Rohm and Haas Company

Inventor： Reetam Chakrabarti ,  Dmitry A. Krapchetov ,  Mark A. Silvano ,  Jinsuo Xu

IPC: C07C47/22 ,  C07C45/82 ,  C07C45/75

Abstract: Provided is a process for preparing methacrolein which maximizes capture of methanol. Also provided are processes for producing methacrylic acid and methyl methacrylate.

公开(公告)号：US20240308949A1

公开(公告)日：2024-09-19

申请号：US18257654

申请日：2021-12-02

Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

Inventor： Jing L. Houser ,  Dmitry A. Krapchetov

IPC: C07C51/25 ,  B01J21/04 ,  B01J21/06 ,  B01J23/06 ,  B01J23/10 ,  B01J23/52 ,  B01J23/66

CPC classification number: C07C51/252 ,  B01J21/04 ,  B01J21/063 ,  B01J21/066 ,  B01J23/06 ,  B01J23/10 ,  B01J23/52 ,  B01J23/66

Abstract: A method for preparing methacrylic acid from methacrolein. The method comprises contacting a liquid mixture comprising methacrolein and water in the presence of oxygen with a heterogeneous catalyst comprising a support and gold; wherein the support comprises an oxide selected from γ-, δ-, or θ-alumina, magnesia, titania, zirconia, hafnia, vanadia, niobium oxide, tantalum oxide, ceria, yttria, lanthanum oxide, zinc oxide or a combination thereof.

公开(公告)号：US11813593B2

公开(公告)日：2023-11-14

申请号：US17252884

申请日：2019-06-20

Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

Inventor： Kirk W. Limbach ,  Christopher D. Frick ,  Dmitry A. Krapchetov ,  Wen -Sheng Lee ,  Victor J. Sussman ,  Jeffrey A. Herron

IPC: B01J23/52 ,  B01J21/04 ,  B01J21/08 ,  B01J35/00 ,  C07C67/39 ,  B01J6/00 ,  B01J37/03

CPC classification number: B01J23/52 ,  B01J21/04 ,  B01J21/08 ,  B01J35/008 ,  C07C67/39 ,  B01J6/001 ,  B01J37/031

Abstract: A heterogeneous catalyst comprising a support and gold, wherein: (i) said support comprises alumina, (ii) said catalyst comprises from 0.1 to 5 wt % of gold, (iii) at least 90 wt % of the gold is in the outer 60% of catalyst volume, and (iv) particles of the catalyst have an average diameter from 200 microns to 30 mm; wherein weight percentages are based on weight of the catalyst.

公开(公告)号：US20230113685A1

公开(公告)日：2023-04-13

申请号：US17908041

申请日：2021-03-15

Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

Inventor： Kirk W. Limbach ,  Christopher D. Frick ,  Wen -Sheng Lee ,  Victor J. Sussman ,  Dmitry A. Krapchetov ,  Jeffrey A. Herron

IPC: B01J23/52 ,  B01J21/06 ,  B01J35/00 ,  B01J37/02 ,  C07C67/39

Abstract: A catalyst comprising noble metal particles and titanium-containing particles. The noble metal particles and titanium-containing particles are disposed on an outer surface of a support. At least 20% by weight of the total weight of noble metal particles are adjacent to at least one titanium-containing particle. The noble metal particles have an average diameter of less than 15 nm, and the catalyst has an average diameter of at least 200 microns. A method for preparing methyl methacrylate from methacrolein and methanol using the catalyst is also disclosed.

公开(公告)号：US20210403404A1

公开(公告)日：2021-12-30

申请号：US16613942

申请日：2018-05-24

Applicant: Rohm and Haas Company

Inventor： Reetam Chakrabarti ,  Sarah L. Hruby ,  Dmitry A. Krapchetov ,  Minh N. Ngo ,  Muhunthan Sathiosatham ,  Mark A. Silvano

IPC: C07C45/75 ,  C07C45/82

Abstract: Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.

公开(公告)号：US20210363094A1

公开(公告)日：2021-11-25

申请号：US16634416

申请日：2018-06-25

Applicant: Rohm and Haas Company ,  Dow Global Technologies LLC

Inventor： Kirk W. Limbach ,  Dmitry A. Krapchetov ,  Daniel A. Hickman ,  Jeffrey Herron

IPC: C07C67/40

Abstract: A method for preparing methyl methacrylate from methacrolein and methanol. The process comprises contacting in a reactor 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, liquid and gaseous reactants flow downward in the reactor and wherein the continuous phase in the reactor is a gas which has no more than 7.5 mol % oxygen at reactor inlets.