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公开(公告)号：US11680033B2
公开(公告)日：2023-06-20
申请号：US17753240
申请日：2020-08-20
Applicant: Röhm GmbH
Inventor： Rudolf Burghardt , Steffen Krill , Florian Zschunke , Eduard Rundal , Torsten Panak , Daniel Helmut König
CPC classification number: C07C45/75 , B01D3/145 , B01D5/006 , B01D17/0214 , B01J14/005 , C07C45/84
Abstract: A process and a preparation plant prepares methacrolein from formaldehyde and propionaldehyde, in presence of water and a homogeneous catalyst based at least on an acid and a base. A reaction mixture is introduced into a methacrolein workup plant and separated in a first distillation column, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed and, in a first phase separator, the organic phase and the aqueous phase of the condensate are separated from one another. The aqueous phase is introduced into a second distillation column, that is not part of the methacrolein workup plant, and is separated into a third distillation mixture in a gas phase at the top and a fourth distillation mixture at the bottom. The third distillation mixture is introduced into the methacrolein workup plant.
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公开(公告)号：US20220289656A1
公开(公告)日：2022-09-15
申请号：US17753232
申请日：2020-08-20
Applicant: Röhm GmbH
Inventor： Rudolf Burghardt , Steffen Krill , Florian Zschunke , Eduard Rundal , Torsten Panak , Daniel Helmut König
Abstract: A process and a preparation plant can prepare methacrolein from formaldehyde and propionaldehyde in the presence of a homogeneous catalyst mixture based at least on an acid and a base. For a good workup of the reaction mixture leaving the reactor, with a good energy balance and where the process has simplified apparatus implementation, the liquid reaction mixture under pressure is expanded in an expansion vessel and separated into a first expansion mixture in a gas phase and a second expansion mixture in a liquid phase. The first expansion mixture is condensed in a first condenser and the second expansion mixture is introduced into a first distillation column and separated therein, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed in the first condenser.
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公开(公告)号：US11542218B2
公开(公告)日：2023-01-03
申请号：US17753232
申请日：2020-08-20
Applicant: Röhm GmbH
Inventor： Rudolf Burghardt , Steffen Krill , Florian Zschunke , Eduard Rundal , Torsten Panak , Daniel Helmut König
Abstract: A process and a preparation plant can prepare methacrolein from formaldehyde and propionaldehyde in the presence of a homogeneous catalyst mixture based at least on an acid and a base. For a good workup of the reaction mixture leaving the reactor, with a good energy balance and where the process has simplified apparatus implementation, the liquid reaction mixture under pressure is expanded in an expansion vessel and separated into a first expansion mixture in a gas phase and a second expansion mixture in a liquid phase. The first expansion mixture is condensed in a first condenser and the second expansion mixture is introduced into a first distillation column and separated therein, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed in the first condenser.
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公开(公告)号：US20220298094A1
公开(公告)日：2022-09-22
申请号：US17753240
申请日：2020-08-20
Applicant: Röhm GmbH
Inventor： Rudolf Burghardt , Steffen Krill , Florian Zschunke , Eduard Rundal , Torsten Panak , Daniel Helmut König
Abstract: A process and a preparation plant prepares methacrolein from formaldehyde and propionaldehyde, in presence of water and a homogeneous catalyst based at least on an acid and a base. A reaction mixture is introduced into a methacrolein workup plant and separated in a first distillation column, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed and, in a first phase separator, the organic phase and the aqueous phase of the condensate are separated from one another. The aqueous phase is introduced into a second distillation column, that is not part of the methacrolein workup plant, and is separated into a third distillation mixture in a gas phase at the top and a fourth distillation mixture at the bottom. The third distillation mixture is introduced into the methacrolein workup plant.
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