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1.发明申请公开(公告)号：US20200172464A1
公开(公告)日：2020-06-04
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
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 %.
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公开(公告)号：US20210113997A1
公开(公告)日：2021-04-22
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
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.
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公开(公告)号：US10829435B2
公开(公告)日：2020-11-10
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
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.
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公开(公告)号：US20200181053A1
公开(公告)日：2020-06-11
申请号：US16614512
申请日：2018-05-24
Applicant: Rohm and Haas Company
Inventor： Reetam Chakrabarti , Charles Como , Sarah L. Hruby , Dmitry A. Krapchetov , Minh N. Ngo , Muhunthan Sathiosatham , Mark A. Silvano
Abstract: Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.
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公开(公告)号：US11691942B2
公开(公告)日：2023-07-04
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
CPC classification number: 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.
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Patent Agency Ranking
公开(公告)号：US10829434B2
公开(公告)日：2020-11-10
申请号：US16634749
申请日：2018-06-25
Applicant: Rohm and Haas Company , Dow Global Technologies LLC
Inventor： Dmitry A. Krapchetov , Kirk W. Limbach , Daniel A. Hickman , Andrew T. Heitsch , Victor Sussman , Wen Sheng Lee , Ramzy Shayib
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 average concentration of methacrolein is at least 15 wt %.
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公开(公告)号：US10829431B2
公开(公告)日：2020-11-10
申请号：US16632939
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
Abstract: A method for preparing methyl methacrylate from methacrolein and methanol. The method 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, wherein oxygen concentration at a reactor outlet is from 0.5 to 7.5 mol % and wherein the reactor comprises a partition with the catalyst bed on a first side of the partition and with flow through the catalyst bed in a first direction and flow on a second side of the partition in an opposite direction.
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公开(公告)号：US10723685B2
公开(公告)日：2020-07-28
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
Abstract: Provided is a process for preparing methacrolein which maximizes capture of methanol. Also provided are processes for producing methacrylic acid and methyl methacrylate.
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9.发明申请公开(公告)号：US20200165185A1
公开(公告)日：2020-05-28
申请号：US16634749
申请日：2018-06-25
Applicant: Rohm and Haas Company , Dow Global Technologies LLC
Inventor： Dmitry A. Krapchetov , Kirk W. Limbach , Daniel A. Hickman , Andrew T. Heitsch , Victor Sussman , Wen Sheng Lee , Ramzy Shayib
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 50% of catalyst volume.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 average concentration of methacrolein is at least 15 wt %.
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公开(公告)号：US20240043365A1
公开(公告)日：2024-02-08
申请号：US18257644
申请日：2021-12-02
Applicant: Dow Global Technologies LLC , Rohm and Haas Company
Inventor： Jing L. Houser , Dmitry A. Krapchetov
CPC classification number: C07C51/252 , B01J23/52 , B01J21/063 , B01J23/66 , B01J23/10 , B01J21/08 , B01J35/023 , B01J35/0073
Abstract: A method for preparing acrylic acid from acrolein. The method comprises contacting a liquid mixture comprising acrolein 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.
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