公开(公告)号：US20180072638A1

公开(公告)日：2018-03-15

申请号：US15561623

申请日：2016-03-14

申请人： BASF SE ,  Linde AG

发明人： Jan Pablo JOSCH ,  Stephan DEUBLEIN ,  Regina BENFER ,  Friedemann GAITZSCH ,  Hendrik REYNEKE ,  Christine TOEGEL ,  Ulrike WENNING ,  Anton WELLENHOFER ,  Heinz BOELT

IPC分类号： C07C5/48 ,  C07C7/11 ,  C07C7/09 ,  C07C7/08 ,  C07C7/00 ,  C07C11/167

CPC分类号： C07C5/48 ,  C07C7/005 ,  C07C7/08 ,  C07C7/09 ,  C07C7/11 ,  C07C11/167

摘要： The invention relates to a process for producing butadiene from n-butenes, comprising the steps of: A) providing an n-butenes-comprising input gas stream a1, B) feeding the n-butenes-comprising input gas stream al, an oxygenous gas and an oxygenous cycle gas stream a2 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) cooling down the product gas stream b and optionally at least partially removing high-boiling secondary components and steam to obtain a product gas stream b′, Cb) compressing and cooling the product gas stream b′ in at least one compression and cooling stage to obtain at least one aqueous condensate stream c1 and one gas stream c2 comprising butadiene, n-butenes, steam, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases, Da) absorbing the C4 hydrocarbons comprising butadiene and n-butenes into an aromatic hydrocarbon solvent absorption medium stream A1 in an absorption column K1 and removing noncondensable and low-boiling gas constituents comprising steam, oxygen, low-boiling hydrocarbons, possibly carbon oxides, aromatic hydrocarbon solvent and possibly inert gases as gas stream d2 from the gas stream c2 to obtain a C4 hydrocarbons-laden absorption medium stream A1′ and the gas stream d2 and subsequently desorbing the C4 hydrocarbons from the laden absorption medium stream A1′ to obtain a C4 product gas stream d1, Db) at least partially recycling the gas stream d2 into the oxidative dehydrogenation zone as cycle gas stream a2, wherein said process comprises limiting the content of aromatic hydrocarbon solvent in the cycle gas stream a2 to less than 1 vol % by contacting in a further column K2 the gas stream d2 exiting the removal stage Da) with an at least partially recirculating liquid absorption medium stream A2 for the aromatic hydrocarbon solvent A1, and limiting the water content of the liquid absorption medium stream A2 in the column K2 to no more than 80 wt %.

公开(公告)号：US20240010597A1

公开(公告)日：2024-01-11

申请号：US18021570

申请日：2021-08-09

申请人： BASF SE

发明人： Jessica Nadine HAMANN ,  Joaquim Henrique TELES ,  Peter Georg OHLEMUELLER ,  Friedemann GAITZSCH ,  Shelue LIANG ,  Stefan RITTINGER ,  Frauke THRUN ,  Richard DEHN

IPC分类号： C07C51/235 ,  C07C51/44

CPC分类号： C07C51/235 ,  C07C51/44

摘要： A process for the preparation of a color stable C6-12 saturated aliphatic carboxylic acid in which (1) the corresponding aldehyde is oxidized with molecular oxygen to obtain the crude saturated aliphatic carboxylic acid in a liquid mixture, (2) molecular oxygen removed from the crude saturated aliphatic carboxylic acid mixture, and (3) the saturated aliphatic carboxylic acid separated from the molecular oxygen depleted mixture by distillation as a color stable product.

公开(公告)号：US20190321774A1

公开(公告)日：2019-10-24

申请号：US16349725

申请日：2017-11-13

申请人： BASF SE

发明人： Boris BREITSCHEIDEL ,  Tim WELLHAUSEN ,  Friedemann GAITZSCH ,  Peter SCHUNCK ,  Olaf KRIHA ,  Stefan STAUB

IPC分类号： B01D53/14 ,  B01D11/04 ,  B01D53/18

摘要： A method for depleting aromatic hydrocarbon from a crude gas stream, comprising the use of an absorption medium comprising one or more compounds of the general formula (I): wherein R1a and R1b are each independently C7 to C12-alkyl and/or one or more compounds of the general formula (II): wherein R2a and R2b are each independently C7 to C12-alkyl.

公开(公告)号：US20220388949A1

公开(公告)日：2022-12-08

申请号：US17775966

申请日：2020-11-13

申请人： BASF SE

发明人： Stefan BLEI ,  Friedemann GAITZSCH ,  Christian SCHUETZ ,  Indre THIEL ,  Petra DECKERT ,  Jun GAO ,  Jessica Nadine HAMANN ,  Andreas MELZER

IPC分类号： C07C315/06

摘要： The invention relates to a process for working up water containing 4,4′-dichlorodiphenyl sulfoxide and/or 4,4′-dichlorodiphenyl sulfone as impurities, comprising: (a) mixing the water containing 4,4′-dichlorodiphenyl sulfoxide and/or 4,4′-dichlorodiphenyl sulfone as impurities with an organic solvent in which 4,4′-dichlorodiphenyl sulfoxide and/or 4,4′-dichlorodiphenyl sulfone have a solubility of at least 0.5 wt % based on the amount of 4,4′-dichlorodiphenyl sulfoxide and/or 4, 4′-dichlorodiphenyl sulfone and organic solvent at 20° C., which forms a two-phase system with water and which can be stripped from water with a stripping gas and subsequently separating the obtained mixture into an aqueous phase and an organic phase, and (b) stripping the organic solvent from the aqueous phase with a stripping gas.