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    71.
    发明专利
    未知

    公开(公告)号：BRPI0605895A

    公开(公告)日：2007-12-18

    申请号：BRPI0605895

    申请日：2006-06-30

    Applicant: BASF AG

    Inventor： WINDECKER GUNTHER ,  WECK ALEXANDER ,  STEINIGER MICHAEL ,  BREDEHOEFT JAN PETER ,  BENDER BIANCA ,  KNAPPIK PETER ,  HAUTTE DANY VANDEN ,  PIERRE BERNARD ,  HAFFNER BEATRIX

    IPC: B01D3/34 ,  B01D53/14

    Abstract: The invention relates to a process for separating off maleic anhydride from a gas stream comprising maleic anhydride, in which a) the gas stream comprising maleic anhydride is brought into contact with a liquid absorbent phase comprising at least one high-boiling inert absorption medium for maleic anhydride and b) maleic anhydride is separated off from the resulting liquid absorbate phase by stripping with a hydrogen-comprising gas as stripping medium in a column, wherein the stripping medium is fed in at two points on the column which are at least one theoretical plate apart.

    72.
    发明专利
    未知

    公开(公告)号：AT365712T

    公开(公告)日：2007-07-15

    申请号：AT03743348

    申请日：2003-02-28

    Applicant: BASF AG

    Inventor： FISCHER ROLF-HARTMUTH ,  ROESCH MARKUS ,  BOTTKE NILS ,  WECK ALEXANDER ,  WINDECKER GUNTHER ,  HESSE MICHAEL ,  BORCHERT HOLGER ,  SCHLITTER STEPHAN

    IPC: C07D207/26 ,  B01J23/72 ,  B01J23/80 ,  C07B61/00 ,  C07D207/267 ,  C07D307/08

    Abstract: A process for coproducing alkyl-substituted or unsubstituted THF and pyrrolidones by catalytically hydrogenating C 4 -dicarboxylic acids and/or derivatives thereof in the gas phase in the presence of copper catalysts and reacting GBL with ammonia or primary amines to give pyrrolidones comprises a) hydrogenating C 4 -dicarboxylic acids and/or derivatives thereof in the gas phase at from 200 to 300° C., from 0.1 to 100 bar, catalyst hourly space velocities of from 0.01 to 1 kg of reactant/l of catalyst*hour and reactant/hydrogen molar ratios of from 20 to 800 in the presence of catalysts comprising copper, aluminum and/or zinc to give mixtures of THF and GBL, b) separating the hydrogenation effluent obtained by distillation into a THF/water mixture as the top product and a GBL-containing bottom product, c) separating the THF/water mixture from step b) in a distillation facility consisting of three columns by withdrawing water from the bottom of the first column, recycling water-containing THF from the second into the first column, passing a side stream of the first into the second column, recycling the bottom product of the third column into the first column and withdrawing a distillate at the top of the first column, wherein a side stream of the second column is passed into the third column and the pure THF is obtained as the top product of the third column, d) recovering GBL from the GBL-containing bottom product from step b) by distillation and e) reacting the GBL obtained with ammonia or amines to give corresponding pyrrolidones.

    76.
    发明专利
    未知

    公开(公告)号：BRPI0412985A

    公开(公告)日：2006-10-03

    申请号：BRPI0412985

    申请日：2004-07-06

    Applicant: BASF AG

    Inventor： DUDA MARK ,  MACHHAMMER OTTO ,  WECK ALEXANDER

    IPC: C07C51/215

    Abstract: Maleic anhydride production by gas-phase oxidation of n-butane with oxygen-containing gases on a heterogeneous vanadium-, phosphorus- and oxygen-containing (VPO) catalyst at 350-500[deg]C with recycling of unconverted n-butane is such that (a) the stream entering the reactor has n-butane and O 2 concentrations of 0.5-1.5 and 5-21 volume % respectively; (b) pressure at the inlet is 0.4-2 MPa abs.; and (c) 40-100% of the n-butane is converted. Maleic anhydride (MA) production by gas- phase oxidation of n-butane with oxygen-containing gases on a heterogeneous vanadium-, phosphorus- and oxygen-containing (VPO) catalyst at 350-500[deg]C with MA separation by forming a gas stream containing unconverted n-butane and water and recycling part of the n-butane to the reactor unit is such that (a) the stream entering the reactor has n-butane and oxygen concentrations of 0.5-1.5 and 5-21 volume % respectively; (b) the pressure at the inlet is 0.4-2 MPa abs.; and (c) 40-100% of the n-butane is converted.

    77.
    发明专利
    未知

    公开(公告)号：AT299872T

    公开(公告)日：2005-08-15

    申请号：AT03709732

    申请日：2003-02-28

    Applicant: BASF AG

    Inventor： WINDECKER GUNTHER ,  WECK ALEXANDER ,  FISCHER ROLF-HARTMUTH ,  ROESCH MARKUS ,  BOTTKE NILS ,  HESSE MICHAEL ,  SCHLITTER STEPHAN ,  BORCHERT HOLGER

    IPC: B01D3/14 ,  C07D307/08

    Abstract: Crude water-containing tetrahydrofuran is purified by passing the crude tetrahydrofuran through three distillation columns, withdrawing water from the bottom of the first column, recycling water-containing tetrahydrofuran from the top of the second column into the first column, passing a sidestream of the first column into the second column, recycling the bottom product of the third column into the first column, and withdrawing a distillate at the top of the first column. Additionally, a sidestream of the second column is passed into the third column and the purified tetrahydrofuran is recovered as the top product of the third column.

    78.
    发明专利
    未知

    公开(公告)号：DE10357715A1

    公开(公告)日：2005-07-14

    申请号：DE10357715

    申请日：2003-12-09

    Applicant: BASF AG

    Inventor： ROESCH MARKUS ,  PINKOS ROLF ,  HESSE MICHAEL ,  SCHLITTER STEPHAN ,  JUNICKE HENRIK ,  SCHUBERT OLGA ,  WECK ALEXANDER ,  WINDECKER GUNTHER

    IPC: C07D307/08 ,  C07D307/33 ,  C07C31/20 ,  C07C29/149 ,  B01J23/80

    Abstract: A process for variably preparing mixtures of optionally alkyl-substituted BDO, GBL and THF by two-stage hydrogenation in the gas phase of C 4 dicarboxylic acids and/or derivatives thereof, which comprises a) hydrogenating in a gas phase a gas stream of C 4 dicarboxylic acids and/or derivatives thereof over a particular catalyst at a particular pressure and temperature to give a stream mainly containing of optionally alkyl-substituted GBL and THF, b) removing any succinct anhydride, c) converting the products remaining predominantly in the gas phase in the partial condensation, THF, water and GBL to give a stream comprising a mixture of BDO, GBL and THF, d) removing the hydrogen from the products and recycling it into the hydrogenation, e) distillatively separating the products, THF, BDO, GBL and water, if appropriate recycling a GBL-rich stream or if appropriate discharging it, and working up BDO, THF and GBL distillatively, and setting the ratio of the products, THF, GBL and BDO, relative to one another within the range from 10 to 100% by weight of THF, from 0 to 90% by weight of GBL and from 0 to 90% by weight of BDO only by varying the temperatures in the two hydrogenation zones and also if appropriate the GBL recycle stream.

    METHOD FOR THE PRODUCTION OF MALEIC ANHYDRIDE
    80.
    发明专利
    METHOD FOR THE PRODUCTION OF MALEIC ANHYDRIDE 未知

    公开(公告)号：CA2533025A1

    公开(公告)日：2005-03-03

    申请号：CA2533025

    申请日：2004-07-06

    Applicant: BASF AG

    Inventor： DUDA MARK ,  WECK ALEXANDER ,  MACHHAMMER OTTO

    IPC: C07C51/215

    Abstract: Disclosed is a method for producing maleic anhydride by means of heterogeneo us catalytic gas phase oxidation of n-butane with gases containing oxygen on a catalyst comprising vanadium, phosphorus, and oxygen in a reactor unit at a temperature ranging between 350 and 500 ~C, whereupon the obtained maleic anhydride is isolated while a gas flow is formed that contains unreacted n- butane and water, and at least some of the unreacted n-butane is recirculate d to the reactor unit. According to the inventive method, an input flow having an n-butane concentration of 0.5 to 1.5 percent by volume and an oxygen concentration of 5 to 21 percent by volume is fed to the reactor unit while a pressure of 0.4 to 2 MPa abs is adjusted at the inlet of the reactor unit an d 40 to 100 percent of the n-butane from the input flow are reacted per reacto r cycle.

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