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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
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：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
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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3.发明申请公开(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
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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4.发明申请公开(公告)号：US20250002443A1
公开(公告)日：2025-01-02
申请号：US18698872
申请日：2022-10-05
Applicant: Rohm and Haas Company
Inventor： Kirk W. Limbach
Abstract: A process for producing methyl methacrylate by oxidative esterification is disclosed. The process comprises reacting methanol and methacrolein in a reactor system comprising an oxygen-containing gas and a heterogeneous noble metal-containing catalyst to produce methyl methacrylate. No Arrhenius base is added to the reactor system.
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公开(公告)号：US20240010592A1
公开(公告)日：2024-01-11
申请号：US18254529
申请日：2021-11-17
Applicant: Rohm and Haas Company
Inventor： Joseph F. Dewilde , Kirk W. Limbach , Reetam Chakrabarti
CPC classification number: C07C45/50 , B01J21/066 , B01J23/08 , B01J35/1057 , B01J29/7015 , B01J29/035
Abstract: A process for preparing aldehydes from synthesis gas includes introducing a first feed stream comprising hydrogen gas and a carbon-containing gas comprising carbon monoxide into a reaction zone of a first reactor, converting the first feed stream into a first product stream comprising C2 to C4 hydrocarbons in the reaction zone in the presence of a first catalyst, wherein the first product stream further comprises carbon dioxide, removing water and C4 and higher hydrocarbons from the first product stream to form a second feed stream, and converting the second feed stream into a second product stream comprising propionaldehyde in the presence of a second catalyst in a second reactor. The propionaldehyde can further be converted to methyl methacrylate via oxidative esterification.
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Patent Agency Ranking
公开(公告)号：US11577225B2
公开(公告)日：2023-02-14
申请号：US16959231
申请日：2018-12-13
Applicant: Dow Global Technologies LLC , Rohm and Haas Company
Inventor： Christopher D. Frick , Jeffrey A. Herron , Kirk W. Limbach , Wen Sheng Lee , Victor J. Sussman
Abstract: A heterogeneous catalyst comprising a support and a noble metal, wherein said support comprises silicon, and wherein said catalyst comprises from 0.1 to 40 mol % titanium and from 0.1 to 10 mol % of at least one noble metal.
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公开(公告)号：US10829433B2
公开(公告)日：2020-11-10
申请号：US16634414
申请日：2018-06-25
Applicant: Rohm and Haas Company , Dow Global Technologies LLC
Inventor： Kirk W. Limbach , Christopher D. Frick , 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 50% of catalyst volume.
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公开(公告)号：US10822297B2
公开(公告)日：2020-11-03
申请号：US16632562
申请日：2018-06-25
Applicant: Rohm and Haas Company , Dow Global Technologies LLC
Inventor： Kirk W. Limbach , Justin Walker , Alan L. Stottlemyer , Jeffrey Herron
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 catalyst bed of heterogeneous catalyst comprising a support and a noble metal, wherein base is added to the reactor while maintaining time to reach 95% homogeneity at no greater than 10 minutes.
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9.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：US09963419B2
公开(公告)日：2018-05-08
申请号：US15521762
申请日：2015-10-02
Applicant: Dow Global Technologies LLC , ROHM AND HAAS COMPANY
Inventor： Zubin B. Kuvadia , Kirk W. Limbach , Dmitri A. Kraptchetov , Mark A. Silvano
CPC classification number: C07C67/54 , B01D3/4205 , C02F1/008 , C02F1/04 , C02F2103/38 , C07C67/39 , C07C67/40 , C07C69/54
Abstract: A process for removing water from an oxidative esterification reactor includes (a) conducting an oxidative esterification reaction in a reactor; (b) removing a crude product stream from the reactor; (c) passing a first portion of the crude product stream directly to a product recovery zone; (d) introducing a second portion of the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (e) passing at least a portion of the columns bottoms stream to the product recovery zone; and (f) recycling a recycle stream comprising at least a portion of the overheads stream to the reactor; wherein the recycle stream contains less than 1 weight percent (wt %) water based on the total weight of the recycle stream, wherein the weight ratio of the first portion to the second portion is at least 1:10, and wherein the amount of the recycle stream recycled to the reactor is such that the reactor contains less than or equal to 2.5 wt % water, based on the weight of the reactor contents.
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