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公开(公告)号：US09193647B2
公开(公告)日：2015-11-24
申请号：US13752516
申请日：2013-01-29
Applicant: BASF SE
Inventor： Sonja Giesa , Regina Benfer
CPC classification number: C07C7/11 , C07C5/333 , C07C5/48 , C07C7/08 , C07C11/167
Abstract: The process for preparing butadiene from n-butane comprises the steps of A) providing a feed gas stream a comprising n-butane; B) feeding the feed gas stream a comprising n-butane into at least one first dehydrogenation zone; C) compressing in at least one first compression stage and cooling the gas stream b; D) absorbing the butenes and the stream c2 comprising butadiene, n-butane, hydrogen and water vapor, with or without inert gases and with or without carbon oxides, with a selective solvent; E) extractively distilling the selective solvent; F) distilling the selective solvent; G) feeding stream f and an oxygenous gas into at least one second dehydrogenation zone and oxidatively dehydrogenating 1-butene and 2-butenes.
Abstract translation: 从正丁烷制备丁二烯的方法包括以下步骤：A）提供包含正丁烷的进料气流a; B）将包含正丁烷的进料气流a送入至少一个第一脱氢区; C）在至少一个第一压缩级中压缩并冷却气流b; D）用选择性溶剂吸收丁烯和包含丁二烯，正丁烷，氢和水蒸汽的流c2，具有或不具有惰性气体和有或无碳氧化物; E）提取蒸馏选择性溶剂; F）蒸馏选择性溶剂; G）将料流f和氧气送入至少一个第二脱氢区并使1-丁烯和2-丁烯氧化脱氢。
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公开(公告)号：US10308569B2
公开(公告)日：2019-06-04
申请号：US15514077
申请日：2015-09-14
Inventor： Jan Pablo Josch , Philipp Grüne , Regina Benfer , Maximilian Vicari , Andre Biegner , Gergor Bloch , Heinz Boelt , Hendrik Reyneke , Christine Toegel , Ulrike Wenning
Abstract: The invention relates to a process for preparing butadiene from n-butenes, comprising the steps of: A) providing an input gas stream a comprising n-butenes, B) feeding the input gas stream a comprising n-butenes and a gas containing at least oxygen into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, giving a product gas stream b comprising butadiene, unconverted n-butenes, water vapor, oxygen, low-boiling hydrocarbons and high-boiling secondary components, with or without carbon oxides and with or without inert gases; Ca) cooling the product gas stream b by contacting with a cooling medium in at least one cooling zone, the cooling medium being at least partly recycled and having an aqueous phase and an organic phase, Cb) compressing the cooled product gas stream b which may have been depleted of high-boiling secondary components in at least one compression stage, giving at least one aqueous condensate stream c1 and one gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without inert gases; D) removing uncondensable and low-boiling gas constituents comprising oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without inert gases, as gas stream d2 from the gas stream c2 by absorbing the C4 hydrocarbons comprising butadiene and n-butenes in an absorbent, giving an absorbent stream laden with C4 hydrocarbons and the gas stream d2, and then desorbing the C4 hydrocarbons from the laden absorbent stream, giving a C4 product gas stream d1, E) separating the C4 product stream d1 by extractive distillation with a butadiene-selective solvent into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes; F) distilling the stream e1 comprising butadiene and the selective solvent into a stream f1 consisting essentially of the selective solvent and a stream f2 comprising butadiene, wherein stage Cb) comprises at least two compression stages Cba) and at least two cooling stages Cbb) configured in the form of quench columns, the cooling in the cooling stages being effected by direct contacting with a biphasic cooling medium having an aqueous phase and an organic phase.
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Patent Agency Ranking
公开(公告)号：US10421700B2
公开(公告)日：2019-09-24
申请号：US15561711
申请日：2016-03-23
Inventor： Jan Pablo Josch , Ragavendra Prasad Balegedde Ramachandran , Christian Walsdorff , Regina Benfer , Anton Wellenhofer , Ulrike Wenning , Heinz Boelt , Hendrik Reyneke , Christine Toegel
Abstract: The invention relates to a process for producing butadiene from n-butenes which comprises the steps of: A) providing a vaporous n-butenes-comprising input gas stream a1 by evaporating a liquid n-butenes-comprising stream a0; B) introducing the vaporous n-butenes-comprising input gas stream a1 and an at least oxygenous gas into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene to obtain a product gas stream b comprising butadiene, unconverted n-butenes, steam, oxygen, low-boiling hydrocarbons, high-boiling secondary components, possibly carbon oxides and possibly inert gases, Ca) chilling the product gas stream b by contacting with a cooling medium comprising an organic solvent in at least one chilling zone, the cooling medium being at least partially recycled into the chilling zone, Cb) compressing the chilled product gas stream b which is possibly depleted of high-boiling secondary components in at least one compression stage to obtain at least one aqueous condensate stream c1 and a gas stream c2 comprising butadiene, n-butenes, steam, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases, D) removing noncondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 by absorbing the C4 hydrocarbons comprising butadiene and n-butenes into an absorption medium to obtain a C4-hydrocarbons-laden absorption medium stream and the gas stream d2 and subsequently desorbing the C4 hydrocarbons from the laden absorption medium stream to obtain a C4 product gas stream d1, wherein at least some of the recycled cooling medium from step Ca) is brought into thermal contact with the liquid n-butenes-comprising stream a0 in one or more indirect heat exchangers and at least some of the liquid n-butenes-comprising stream a0 is evaporated by indirect heat transfer with the recycled cooling medium.
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公开(公告)号：US10144681B2
公开(公告)日：2018-12-04
申请号：US14150239
申请日：2014-01-08
Applicant: BASF SE
Inventor： Jan Pablo Josch , Alexander Weck , Sonja Giesa , Steffen Bütehorn , Ragavendra Prasad Balegedde Ramachandran , Regina Benfer , Markus Weber
Abstract: A process for the oxidative dehydrogenation of n-butenes to butadiene is disclosed herein, in which the formation of butadiene peroxides from butadiene in the work-up of the product gas mixture from the oxidative dehydrogenation is effectively prevented.
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公开(公告)号：US20140200379A1
公开(公告)日：2014-07-17
申请号：US14150239
申请日：2014-01-08
Applicant: BASF SE
Inventor： Jan Pablo Josch , Alexander Weck , Sonja Giesa , Steffen Büteborn , Ragavendra Prasad Balegedde Ramachandran , Regina Benfer , Markus Weber
IPC: C07C5/48
CPC classification number: C07C5/48 , C07C7/08 , C07C7/11 , C07C11/167
Abstract: The invention relates to a process for preparing butadiene from n-butenes, which comprises the following steps: A) provision of a feed gas stream a comprising n-butenes; B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into at least one dehydrogenation zone and oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; C) cooling and compression of the product gas stream b in at least one compression stage, giving at least one condensate stream c1 comprising water and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; D) separation of incondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 by Da) absorption of the C4-hydrocarbons comprising butadiene and n-butenes in a high-boiling absorption medium, giving an absorption medium stream loaded with C4-hydrocarbons and the gas stream d2, Db) removal of oxygen from the absorption medium stream loaded with C4-hydrocarbons by stripping with an inert gas and Dc) desorption of the C4-hydrocarbons from the loaded absorption medium stream to give a C4 product gas stream d1 which consists essentially of C4-hydrocarbons and comprises less than 100 ppm of oxygen; E) separation of the C4 product stream d1 by extractive distillation with a solvent which is selective for butadiene into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes; F) distillation of the stream e1 comprising butadiene and the selective solvent to give a stream f1 consisting essentially of the selective solvent and a butadiene-comprising stream f2.
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公开(公告)号：US10336668B2
公开(公告)日：2019-07-02
申请号：US15529133
申请日：2015-11-18
Applicant: BASF SE
Inventor： Jan-Oliver Weidert , Sandra Kramp , Regina Benfer , Alexander Panchenko , Andreas Weickgenannt , Norbert Gutfrucht , Klaus Breuer , Artur Kozicki , Ralph Busch
IPC: C07C7/04 , B01D3/00 , B01D3/10 , C07C209/86 , C07C211/36
Abstract: A process for preparing trans-enriched MDACH, including: distilling an MDACH starting mixture in the presence of an auxiliary, which is an organic compound having a molar mass of 62 to 500 g/mol, a boiling point at least 5° C. above the boiling point of cis,cis-2,6-diamino-1-methylcyclohexane, and 2 to 4 functional groups, each of which is independently an alcohol group or a primary, secondary or tertiary amino group. The MDACH starting mixture includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, based on the total amount of MDACH present in the MDACH starting mixture. The MDACH starting mixture includes both trans and cis isomers. Trans-enriched MDACH includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, where the proportion of trans isomers in the mixture is higher than the proportion of trans isomers in the MDACH starting mixture.
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公开(公告)号：US20130211166A1
公开(公告)日：2013-08-15
申请号：US13752516
申请日：2013-01-29
Applicant: BASF SE
Inventor： Sonja Giesa , Regina Benfer
CPC classification number: C07C7/11 , C07C5/333 , C07C5/48 , C07C7/08 , C07C11/167
Abstract: The process for preparing butadiene from n-butane comprises the steps of A) providing a feed gas stream a comprising n-butane; B) feeding the feed gas stream a comprising n-butane into at least one first dehydrogenation zone; C) compressing in at least one first compression stage and cooling the gas stream b; D) absorbing the butenes and the stream c2 comprising butadiene, n-butane, hydrogen and water vapor, with or without inert gases and with or without carbon oxides, with a selective solvent; E) extractively distilling the selective solvent; F) distilling the selective solvent; G) feeding stream f and an oxygenous gas into at least one second dehydrogenation zone and oxidatively dehydrogenating 1-butene and 2-butenes.
Abstract translation: 从正丁烷制备丁二烯的方法包括以下步骤：A）提供包含正丁烷的进料气流a; B）将包含正丁烷的进料气流a送入至少一个第一脱氢区; C）在至少一个第一压缩级中压缩并冷却气流b; D）用选择性溶剂吸收丁烯和包含丁二烯，正丁烷，氢和水蒸汽的流c2，具有或不具有惰性气体和有或无碳氧化物; E）提取蒸馏选择性溶剂; F）蒸馏选择性溶剂; G）将料流f和氧气送入至少一个第二脱氢区并使1-丁烯和2-丁烯氧化脱氢。
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