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    Preparation of acrolein and/or acrylic acid useful for e.g. preparing polymers involves dehydrogenating propane to hydrogen and product gas comprising propylene; and oxidizing molecular hydrogen to steam and product gas to target products
    71.
    发明专利
    Preparation of acrolein and/or acrylic acid useful for e.g. preparing polymers involves dehydrogenating propane to hydrogen and product gas comprising propylene; and oxidizing molecular hydrogen to steam and product gas to target products 未知

    公开(公告)号：DE102005056377A1

    公开(公告)日：2007-05-31

    申请号：DE102005056377

    申请日：2005-11-24

    Applicant: BASF AG

    Inventor： MACHHAMMER OTTO ,  MUELLER-ENGEL KLAUS JOACHIM ,  DIETERLE MARTIN

    IPC: C07C47/22 ,  C07C57/05

    Abstract: Preparation of acrolein and/or acrylic acid (target product) involves: in reaction zone (A): partially dehydrogenating propane catalytically from a mixture of fresh propane and recycled mixture forming molecular hydrogen and propylene; oxidizing molecular hydrogen to steam and forming product gas (A); in reaction zone (B): partially oxidizing product gas (A) to product gas (B) comprising target product; in separation zones: removing target product from product gas (B), scrubbing of carbon dioxide present in the residual gas (I); and recycling residual gas (I) into reaction zone (A). Preparing acrolein and/or acrylic acid (target product) from propane involves: (i) in reaction zone (A): feeding gaseous streams of fresh propane, and recycled mixture to a first reaction zone (A) to form a reaction gas (A), passing the reaction gas A through at least one catalyst bed in which partial heterogeneously catalyzed dehydrogenation of the propane forms molecular hydrogen and propylene; oxidizing molecular hydrogen by molecular oxygen to steam; and feeding the resulting product gas (A) comprising molecular hydrogen, steam, propylene and propane is withdrawn from reaction zone (A) to reaction zone (B); (ii) in reaction zone (B), the product gas A from reaction zone A, with feeding of molecular oxygen, forming a reaction gas (B) comprising molecular hydrogen, steam, propane, propylene and molecular oxygen, and the propylene is subjected to a heterogeneously catalyzed partial gas phase oxidation to give a product gas (B) comprising target product, unconverted propane, molecular hydrogen, steam, carbon dioxide as a by-product, and also other secondary components having lower and higher boiling points than water; (iii) in a first separation zone: removing target product, water and secondary components having a higher boiling point than water present from the product gas (B) to leave a residual gas (I) comprising unconverted propane, carbon dioxide, molecular hydrogen, the secondary components and any unconverted propylene and any unconverted molecular oxygen; (iv) in second separation zone: as an aftertreatment measure (1), scrubbing out carbon dioxide present in residual gas (I) and condensing out water present if any; as an aftertreatment measure (2), discharging a remaining portion of residual gas (I); as aftertreatment treatment measure (3), removing molecular hydrogen by a separating membrane in a third separation zone (III); and as an aftertreatment measure (4), chemically reducing any molecular oxygen present in residual gas (I), where the sequence of use of aftertreatment measures 1 - 4 is as desired; and (v): recycling aftertreated residual gas (I) which comprises unconverted propane into reaction zone (A) as at least one of the two feed streams comprising propane. The amount of molecular hydrogen (M), which is at least 5 - 95 mol % of the total amount of molecular hydrogen produced in reaction zone (A) and that fed to reaction zone (A), is oxidized to steam in reaction zone (A).

    Preparation of acrolein/acrylic acid comprises supplying gas mixture stream A to zone A, supplying propane gas stream to obtain product gas mixture; dividing product stream A into two component streams; feeding a stream to zone B
    72.
    发明专利
    Preparation of acrolein/acrylic acid comprises supplying gas mixture stream A to zone A, supplying propane gas stream to obtain product gas mixture; dividing product stream A into two component streams; feeding a stream to zone B 未知

    公开(公告)号：DE102005049699A1

    公开(公告)日：2007-04-19

    申请号：DE102005049699

    申请日：2005-10-14

    Applicant: BASF AG

    Inventor： KLANNER CATHARINA ,  DIETERLE MARTIN ,  SCHINDLER GOETZ-PETER ,  CHENG TSUNG-CHIEH ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07C57/05 ,  B01J12/00 ,  C07C5/333 ,  C07C11/06 ,  C07C45/28 ,  C07C47/22

    Abstract: Preparation of acrolein/acrylic acid from propane comprises supplying reaction gas mixture input stream A to a reaction zone A; supplying dehydrogenated propane gas stream to obtain a product gas mixture; removing the product mixture stream A; dividing the product gas mixture stream A into component streams (I) and (II); feeding the component stream (II) in a second reaction zone B into an oxidative reactor, in which propylene in stream (II) is oxidized to form a product gas mixture B containing e.g. acrolein/acrylic acid as final product and separating the final product. Preparation of acrolein and/or acrylic acid from propane comprises supplying a reaction gas mixture input stream A (which is produced by merging at least four different gaseous initial streams 1, 2, 3 and 4) to the inlet of the first reaction zone A by at least a catalyst bed; optionally further supplying partially, heterogeneously catalyzed dehydrogenated propane gas stream to the mixture to obtain a product gas mixture containing propane and propylene; removing the obtained product gas mixture stream A from the first reaction zone A by discharge opening; dividing the product gas mixture stream A into two component streams (I) and (II) with identical composition, where the component stream (I) is fed back as gaseous initial stream 1 into the first reaction zone A in a first gas cycle operation and the component stream (II) is optionally led into the first separation zone A, to separate partial or large quantity of different propane and propylene components and to produce a residual product gas mixture stream A1 containing propane and propylene; feeding the component stream (II) or the product gas mixture in a second reaction zone B into at least an oxidative reactor, in which the propylene contained in the component stream (II) or in the product gas mixture stream A1 is subjected to selective heterogeneously catalyzed partial gaseous phase oxidation with molecular oxygen to form a product gas mixture B containing acrolein and/or acrylic acid as final product, optionally unconverted propane and propylene, and surplus molecular oxygen; removing the product gas mixture stream B from the reaction zone B; separating the final product, where the residual gas containing unconverted propane and propylene, and molecular oxygen is fed back as gaseous initial stream 2 in a second gas cycle operation into the reaction zone A (when the gaseous initial streams 2, 3 and 4 and optionally a gaseous stream different from the 1 are merged to a single propelled jet gaseous mixture stream); and subsequently operating the mixture with gaseous propelled jet mixture stream as propelled jet of a jet pump, which comprises a jet nozzle, a mixing path, a diffuser and a suction intake socket; where the direction of the propulsion of the propelled jet by the jet nozzle over a mixing path and the diffuser, points towards the inlet of the first reaction zone A and the suction effect of the suction intake socket, points towards the direction of the discharge opening of the first reaction zone A leading to the product gas mixture stream A and the component stream (I) is sucked through the negative pressure produced in the suction intake socket along with the splitting up of the product gas mixture A into the two component stream, and is transported with simultaneous mixing of propelled jet by the mixing path over the diffuser and the obtained reaction gas mixture input stream A is left into the inlet of the first reaction zone A; the gaseous initial streams 1, 2 and 3 is a propane, the gaseous initial stream 4 is a molecular hydrogen and the gaseous initial stream 3 is a fresh propane; the first gaseous initial stream 2 and 3 and optionally stream 1 and stream 4 are combined in an arbitrary sequence to a single gaseous mixture stream and stream 4 is added to the gaseous initial mixture stream under the formation of the gaseous propelled jet mixture stream.

    Preparing organic target compound by heterogeneously catalyzed gas phase partial oxidation of organic precursor compound with molecular oxygen in two oxidation reactor lines operated in parallel and removal of compound from gas stream
    73.
    发明专利
    Preparing organic target compound by heterogeneously catalyzed gas phase partial oxidation of organic precursor compound with molecular oxygen in two oxidation reactor lines operated in parallel and removal of compound from gas stream 未知

    公开(公告)号：DE102005009882A1

    公开(公告)日：2006-11-16

    申请号：DE102005009882

    申请日：2005-03-01

    Applicant: BASF AG

    Inventor： DIETERLE MARTIN ,  MUELLER-ENGEL KLAUS JOACHIM ,  PETZOLDT JOCHEN ,  HAMMON ULRICH

    IPC: C07B33/00 ,  C07B35/04 ,  C07C45/33 ,  C07C47/22 ,  C07C57/05

    Abstract: Preparing at least one organic target compound (I) by heterogeneously catalyzed gas phase partial oxidation of at least one organic precursor compound with molecular oxygen in at least two oxidation reactor systems comprising catalyst charges and are operated in parallel to obtain at least two product gas streams (II) each comprising (I) and each stemming from one of the at least two oxidation reactor systems and subsequent removal of (I) from (II) to obtain at least one crude target product stream, where the process comprises before, during and/or after the removal, mixing together (II). Preparing at least one organic target compound (I) by heterogeneously catalyzed gas phase partial oxidation of at least one organic precursor compound with molecular oxygen in at least two oxidation reactor systems comprising catalyst charges and are operated in parallel to obtain at least two product gas streams (II) each comprising (I) and each stemming from one of the at least two oxidation reactor systems and subsequent removal of (I) from (II) to obtain at least one crude target product stream, where the process comprises before the removal, mixing together (II); or in the course of the removal, mixing together at least two of any target product-comprising subsequent streams obtained on the route from (II) to the at least one crude target product stream; and/or after the removal from (II), mixing together any crude target product streams obtained in the course of the removal, to form a mixture stream, where at least one of the catalyst charges of the at least two oxidation reactor systems operated in parallel, over which the target compounds comprised in the mixture stream were formed, comprises at least one portion of catalyst over which the heterogeneously catalyzed gas phase partial oxidation has already been carried out longer than over all portions of catalyst of the at least one other catalyst charge. An independent claim is included for an apparatus comprising two oxidation reactor systems which are charged with catalysts that are suitable for the preparation of (I) by heterogeneously catalyzed partial oxidation of an organic precursor compound and at whose outlet is disposed in each case a line for the removal of the product gas stream comprising (I) from the particular oxidation reactor system, which lines are combined with increasing distance from the two oxidation reactor systems to give a product gas line which leads to an apparatus in which the product gas stream can be condensed partly or fully, where the catalyst charge of one of the two oxidation reactor systems comprises at least one portion of catalyst over which more target product has already been generated than over the portions of catalyst of the catalyst charge of the other oxidation reactor system.

    Preparation of acrolein or acrylic acid involves conducting starting reaction gas mixture having propylene and molecular oxygen reactants and inert molecular nitrogen and propane diluent gasses through fixed catalyst bed
    75.
    发明专利
    Preparation of acrolein or acrylic acid involves conducting starting reaction gas mixture having propylene and molecular oxygen reactants and inert molecular nitrogen and propane diluent gasses through fixed catalyst bed 未知

    公开(公告)号：DE102005009891A1

    公开(公告)日：2006-09-07

    申请号：DE102005009891

    申请日：2005-03-01

    Applicant: BASF AG

    Inventor： DIETERLE MARTIN ,  MUELLER-ENGEL KLAUS-JOACHIM ,  HECHLER CLAUS ,  HAMMON ULRICH ,  DIEFENBACHER ARMIN

    IPC: C07C57/05 ,  C07C57/07 ,  C08F20/06

    Abstract: Acrolein or acrylic acid is prepared by catalyzing partial gas phase oxidation of propene, where a starting reaction gas mixture having propylene and molecular oxygen reactants and inert molecular nitrogen and propane diluent gasses is conducted at elevated temperature through a fixed catalyst bed whose active composition is a multimetal oxide having molybdenum, iron and bismuth. Preparation of acrolein or acrylic acid involves catalyzing partial gas phase oxidation of propene, where a starting reaction gas mixture having propylene and molecular oxygen reactants and the inert molecular nitrogen and propane diluent gasses and having the molecular oxygen and the propylene in a molar oxygen;C 3H 6 ratio of >=1 is conducted at elevated temperature through a fixed catalyst bed whose active composition is a multimetal oxide having molybdenum, iron and bismuth based on its total volume of 6-9 vol.% propylene, 8-18 vol.% molecular oxygen. 6-30 vol.% propane and 32-72 vol.% molecular nitrogen. The molar ratio V 1 of propane in starting reaction gas mixture to propylene in starting reaction gas mixture is 1-4. The molar V 2 of molecular nitrogen present in starting reaction gas mixture to molecular oxygen in starting reaction the mixture is 2-6, and the molar ratio of the molecular oxygen in starting reaction gas mixture to propylene in starting reaction mixture is 1.3-2.4.

    Long-term operation of heterogeneously catalyzed gas phase partial oxidation of acrolein to acrylic acid, by interrupting gas phase partial oxidation
    77.
    发明专利
    Long-term operation of heterogeneously catalyzed gas phase partial oxidation of acrolein to acrylic acid, by interrupting gas phase partial oxidation 未知

    公开(公告)号：DE10350822A1

    公开(公告)日：2005-06-02

    申请号：DE10350822

    申请日：2003-10-29

    Applicant: BASF AG

    Inventor： DIETERLE MARTIN ,  PETZOLDT JOCHEN ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07C51/25 ,  C07C57/055 ,  B01J23/16

    Abstract: Long-term operation of a heterogeneously catalyzed gas phase partial oxidation of acrolein to acrylic acid comprises interrupting gas phase partial oxidation once before temperature increase of fixed catalyst bed is permanently >=10[deg]C, and, at a temperature of fixed catalyst bed of 200-450[deg]C, conducting an acrolein-free, oxidizing gas mixture comprising molecular oxygen, and inert gas through the fixed catalyst bed. Long-term operation of a heterogeneously catalyzed gas phase partial oxidation of acrolein to acrylic acid, comprises conducting a starting reaction gas mixture which comprises acrolein, molecular oxygen and inert diluent gas through a fixed catalyst bed at elevated temperature whose catalysts are such that their active composition is multimetal oxide that contains molybdenum (Mo) and vanadium (V), and by, to counteract the deactivation of the fixed catalyst bed, increasing the temperature of the fixed catalyst bed over time, which comprises interrupting the gas phase partial oxidation once before the temperature increase of the fixed catalyst bed is permanently >=10[deg]C, and, at a temperature of the fixed catalyst bed of 200-450[deg]C, conducting an acrolein-free, oxidizing gas mixture comprising molecular oxygen, inert gas and optionally steam and also optionally carbon monoxide (CO) through the fixed catalyst bed.

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