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公开(公告)号:US20240018078A1
公开(公告)日:2024-01-18
申请号:US18039504
申请日:2021-12-01
Applicant: BASF SE
Inventor: Wolf-Steffen WEISSKER , Edward RICHMOND
CPC classification number: C07C31/30 , C07C29/705 , B01D3/009 , B01D3/4277
Abstract: A method for controlling a reactive distillation column for effecting a transalcoholisation reaction, comprising feeding a metal methoxide into the reactive distillation column via a side feed; feeding a reactant alcohol into a lower part of the reactive distillation column; withdrawing methanol from the top of the reactive distillation column; and withdrawing a solution of a product metal alkoxide in the reactant alcohol from the bottom of the reactive distillation column; wherein the method comprises a process control scheme selected from: Scheme A: establishing a signal S1 which is responsive to a temperature in the rectifying section disposed above the feed of the metal methoxide; and manipulating in response to the signal S1 the feed amount of the reactant alcohol; Scheme B: establishing a signal S1 which is responsive to a temperature in the rectifying section disposed above the feed of the metal methoxide; and manipulating in response to the signal S1 the heat supplied to the bottom of the reactive distillation column. The invention also relates to a method for controlling a reactive distillation column for effecting a transalcoholisation reaction, comprising feeding a metal methoxide into the reactive distillation column via a side feed; feeding a reactant alcohol into a lower part of the reactive distillation column; causing an auxiliary alcohol to be present in the reactive distillation column; and optionally replenishing the auxiliary alcohol via a side feed located above the feed of the reactant alcohol and below the top of the column; withdrawing methanol from the top of the reactive distillation column; and withdrawing a solution of a product metal alkoxide in the reactant alcohol from the bottom of the reactive distillation column; wherein the method comprises a process control scheme selected from: Scheme C: establishing a signal S2 which is responsive to a temperature at a point located between the feed of the metal methoxide and the bottom of the reactive distillation column; and manipulating in response to the signal S2 the feed amount of the reactant alcohol; Scheme D: establishing a signal S2 which is responsive to a temperature at a point located between the feed of the metal methoxide and the bottom of the reactive distillation column; and manipulating in response to the signal S2 the heat supplied to the bottom of the reactive distillation column. The methods of the invention allow for improved controlling of a reactive distillation column for effecting a transalcoholisation reaction.
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公开(公告)号:US20200010394A1
公开(公告)日:2020-01-09
申请号:US16460327
申请日:2019-07-02
Applicant: BASF SE
Inventor: Dagmar Pascale KUNSMANN-KEITEL , Georg Heinrich GROSCH , Jan-Dirk ARNDT , Gauthier Luc Maruice AVERLANT , Wolf-Steffen WEISSKER , Marcus Georg SCHREMS , Dan-Tam Daniel TANG
Abstract: Method for preparing 1-hydroxy-2-methyl-3-pentanone (I) by reacting formaldehyde with diethyl ketone in a reactor in the presence of water and a basic component at a temperature of 50 to 150° C. and a pressure of 0.2 to 10 MPa abs, in which the basic component used is a trialkylamine from the group comprising trimethylamine, N,N-dimethylethylamine, N,N-diethylmethylamine, triethylamine, N,N-dimethyl-n-propylamine, N-ethyl-N-methyl-n-propylamine, N,N-dimethylisopropylamine, N-ethyl-N-methylisopropylamine, N,N-dimethyl-n-butylamine, N,N-dimethylisobutylamine and N,N-dimethyl-sec-butylamine, and from the reaction mixture obtained, trialkylamine as low boiler and a bottom product comprising 1-hydroxy-2-methyl-3-pentanone (I) as high boiler are separated in a distillation apparatus, wherein the distillation apparatus is operated at a top pressure of 0.2 to 1 MPa abs.
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公开(公告)号:US20230047974A1
公开(公告)日:2023-02-16
申请号:US17791542
申请日:2020-12-29
Applicant: BASF SE
Inventor: Joaquim Henrique TELES , Jessica Nadine HAMANN , Jonathan Thomas LEFEBVRE , Wolf-Steffen WEISSKER , Shelue LIANG
IPC: C07C51/235 , C07C51/44
Abstract: A process for the preparation of a saturated aliphatic carboxylic acid with 3 to 5 carbon atoms by oxidation of the corresponding aldehyde with oxygen in which (a) the corresponding aldehyde is converted with oxygen at a temperature of 40 to 150° C. and an oxygen partial pressure of 0.001 to 1 MPa to obtain a mixture containing the saturated aliphatic carboxylic acid and ≤2 mol-% of the corresponding aldehyde with respect to the saturated aliphatic carboxylic acid, (b) the mixture obtained in step (a) is thermally treated in the liquid phase at a temperature of 80 to 250° C. and a pressure of 0.1 to 2 MPa abs for 0.25 to 100 hours, and (c) the mixture obtained in step (b) is distilled in a distillation apparatus to obtain a distillate containing ≥90 wt.-% of the saturated aliphatic carboxylic acid and having an active oxygen content of 0 to 25 wt.-ppm based on the distillate.
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公开(公告)号:US20240002319A1
公开(公告)日:2024-01-04
申请号:US18039503
申请日:2021-12-01
Applicant: BASF SE
Inventor: Wolf-Steffen WEISSKER , Edward RICHMOND
CPC classification number: C07C29/705 , C07C29/80
Abstract: A process for preparing metal alkoxides by transalcoholisation, comprising: feeding a lower metal alkoxide and a higher alcohol into a reactive distillation column; removing a solution of a higher metal alkoxide in the higher alcohol from the bottom of the column or from a recycle stream taken from the bottom of the column; and removing a gaseous lower alcohol from the top of the column, at least partially condensing the gaseous lower alcohol, and recirculating a part of the condensate to the top of the column; wherein an auxiliary alcohol is provided in the reactive distillation column, the boiling point of the auxiliary alcohol being between the boiling point of the lower alcohol and the boiling point of the higher alcohol at the pressure prevailing in the reactive distillation column. The process allows for high conversion of a lower metal alkoxide to a higher metal alkoxide while limiting the formation of solid deposits in the column, while having low energy requirements.
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公开(公告)号:US20200010395A1
公开(公告)日:2020-01-09
申请号:US16460402
申请日:2019-07-02
Applicant: BASF SE
Inventor: Dagmar Pascale KUNSMANN-KEITEL , Georg Heinrich GROSCH , Jan-Dirk ARNDT , Gauthier Luc Maruice AVERLANT , Wolf-Steffen WEISSKER , Marcus Georg SCHREMS , Dan-Tam Daniel TANG
Abstract: Method for preparing a β-hydroxyketone having 4 to 8 carbon atoms by reacting formaldehyde with a branched or unbranched dialkyl ketone having 3 to 7 carbon atoms in the liquid phase in a reactor in the presence of a basic component at a temperature of 50 to 150° C. and a pressure of 0.2 to 10 MPa abs, in which (a) a trialkylamine having 1 to 4 carbon atoms per alkyl group is used as basic component and the reaction (b) is carried out in the presence of 1 to 25% by weight water, based on the liquid phase, and (c) at a molar ratio of trialkylamine to formaldehyde in the liquid phase of from 1 to 5.
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公开(公告)号:US20240208892A1
公开(公告)日:2024-06-27
申请号:US18287503
申请日:2022-04-11
Applicant: BASF SE
Inventor: Edward RICHMOND , Wolf-Steffen WEISSKER , Rocco PACIELLO
CPC classification number: C07C51/48 , B01D11/0492 , C07C51/15
Abstract: A method for separating a salt S, wherein the salt S is present dispersed in an aprotic polar liquid A, the liquid A containing the dispersed salt S is extracted with a non-polar liquid B, wherein the salt S is dispersed in the liquid B, and the liquid B containing the dispersed salt S is extracted with water, wherein the solid is dissolved in water.
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公开(公告)号:US20240025829A1
公开(公告)日:2024-01-25
申请号:US18039501
申请日:2021-12-03
Applicant: BASF SE
Inventor: Wolf-Steffen WEISSKER , Josef GUTH , Kai HOFEN , Holger FRIEDRICH
Abstract: The present invention relates to an integrated process for simultaneously preparing at least two mixtures comprising alkali metal methoxide and methanol in at least two parallel reactive distillation columns, wherein one rectification column is used for providing a methanol stream which is then used as methanol source for the reactive distillation columns, and wherein the top streams of said reactive distillation columns are used as methanol source for said rectification column.
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公开(公告)号:US20230138524A1
公开(公告)日:2023-05-04
申请号:US17911666
申请日:2021-03-17
Applicant: BASF SE
Inventor: Nuria HUGET SUBIELA , Wolf-Steffen WEISSKER
Abstract: A catalytic process for preparing an α,β-ethylenically unsaturated carboxylic acid salt, comprising a) contacting an alkene and carbon dioxide with a carboxylation catalyst, an organic solvent, and an alkoxide having a secondary or tertiary carbon atom directly bound to an [O−] group, to obtain a crude reaction product comprising the α,β-ethylenically unsaturated carboxylic acid salt and an alcohol by-product which is the conjugate acid of the alkoxide, b) allowing the α,β-ethylenically unsaturated carboxylic acid salt to precipitate out from the crude reaction product; and c) subjecting at least part of the crude reaction product to a mechanical separation step while maintaining the alcohol by-product in liquid form to obtain a solid phase comprising the α,β-ethylenically unsaturated carboxylic acid salt and a liquid phase comprising the carboxylation catalyst, the organic solvent and the alcohol by-product. The process allows for easy separation of the α,β-ethylenically unsaturated carboxylic acid salt by a mechanical separation operation.
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公开(公告)号:US20230054206A1
公开(公告)日:2023-02-23
申请号:US17785674
申请日:2020-12-16
Applicant: BASF SE
Inventor: Wolf-Steffen WEISSKER , Nuria HUGUET SUBIELA
IPC: C07C29/70
Abstract: Process for preparing metal alkoxides by means of transalcoholization, wherein a lower metal alkoxide is fed via a side feed into a reactive distillation column comprising a rectifying section situated above the feed and a stripping section situated below the feed; a higher alcohol is fed into the stripping section, the bottom and/or a bottoms circuit of the column; a solution of a higher metal alkoxide in the higher alcohol is taken off at the bottom of the column and/or from the bottoms circuit; and a vapor comprising lower alcohol is taken off at the top of the column, the vapor is at least partially condensed and a substream of the condensate is recycled to the top of the column as reflux. The process enables the preparation of metal alkoxides with a reduced energy requirement.
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