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公开(公告)号:US10974964B2
公开(公告)日:2021-04-13
申请号:US15779347
申请日:2016-11-18
Applicant: BASF SE
Inventor: Gerhard Olbert , Jochen Gauer , Holger Friedrich , Andreas Spiegel , Andreas Wölfert , Wolfgang Gmeiner , Michael Lorenz
Abstract: The present invention relates to a reactor R with apparatus D, the latter comprising a gas- and/or liquid-permeable tray B, in the edge region of which there is disposed a lateral boundary W which fully encloses the tray B and forms a volume V comprising catalytic and/or noncatalytic shaped bodies (F), wherein there is at least one braid made of precious metal and/or base metal on the upstream side opposite the tray B, and the catalytic and/or noncatalytic shaped bodies (F) are selected from (i) shaped bodies (F1) in the form of straight prisms, the footprint of which is selected from triangle, rectangle, hexagon or fragments of these polygons, and (ii) a combination of the shaped bodies (F1) with shaped bodies (F2) that are smaller than the shaped bodies (F1), wherein groups of m to n shaped bodies (F1), m and n being an integer from 3 to 30 with n>m, are framed in a metal cassette open in the upstream direction and closed in the downstream direction by a gas-permeable tray, in a virtually seamless manner with side face to side face and with their longitudinal axis aligned in vertical direction, virtually completely covering the cross section of the tray, to form modules (M), and the modules (M), optionally with cooperation of a joint filler material, with vertical alignment of the longitudinal axis of the shaped bodies (F1), are joined to one another virtually seamlessly in a mosaic-like manner.
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公开(公告)号:US09914693B2
公开(公告)日:2018-03-13
申请号:US14771409
申请日:2014-02-12
Applicant: BASF SE
Inventor: Hermann Luyken , Stephanie Jaegli , Michael Lorenz , Gordon Brasche , Markus Jegelka , Barbara Becker , Robert Baumann , Johann-Peter Melder , Boris Buschhaus , Thomas Krug
IPC: C07C209/48 , C07C253/00 , C07C253/30 , C07C209/86 , C07C253/08
CPC classification number: C07C209/48 , C07C209/86 , C07C253/00 , C07C253/08 , C07C253/30 , C07C255/12 , C07C255/25 , C07C211/10
Abstract: The present invention relates to a process for preparing ethylenediamine (EDA), where the process comprises the steps a) to c). In step a), formaldehyde is reacted with hydrocyanic acid (HCN) to form formaldehyde cyanohydrin (FACH), where the hydrocyanic acid is completely free or largely free of sulfur dioxide (SO2). The FACH prepared in this way is reacted with ammonia (NH3) to form aminoacetonitrile (AAN) in step b), whereupon a hydrogenation of AAN in the presence of a catalyst to form EDA is carried out in step c).
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公开(公告)号:US09828329B2
公开(公告)日:2017-11-28
申请号:US15125850
申请日:2015-03-11
Applicant: BASF SE
Inventor: Hermann Luyken , Stephanie Jaegli , Michael Lorenz , Gordon Brasche , Markus Jegelka , Barbara Becker , Robert Baumann , Johann-Peter Melder , Boris Buschhaus , Thomas Krug
IPC: C07C209/84
CPC classification number: C07C209/84 , C07C209/16 , C07C209/48 , C07C213/04 , C07C253/08 , C07C253/30 , C07C211/10 , C07C255/16 , C07C255/25 , C07C215/08
Abstract: The present invention relates to a process for purifying ethylenediamine (EDA) by distillation, wherein the process comprises the steps a) and b). In step a), a mixture (G1) comprising water, EDA and N-methylethylenediamine (N-MeEDA) is fed into a distillation apparatus (D1), and the major part of the water comprised in the mixture (G1) is separated off overhead at a pressure of greater than 4.8 bara. From the bottom of (D1), the water-enriched mixture (G2) is fed into a distillation apparatus (D2) in step b). At the top of (D2), the major part of the N-MeEDA is distilled off. The stream (S3) obtained from the bottom of (D2) comprises EDA, with the components water and N-MeEDA comprised in the mixture (G1) having been largely or completely removed. Further distillation steps can optionally be carried out in order to obtain pure EDA, for example when diethylenetriamine (DETA) is additionally comprised in the mixture (G1). If ammonia is additionally comprised in the mixture (G1), an ammonia removal is preferably additionally carried out before carrying out the step a) in the process of the invention.
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