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    Production of acrolein and acrylic acid by heterogeneous catalyzed gas phase oxidation of propane
    27.
    发明专利
    Production of acrolein and acrylic acid by heterogeneous catalyzed gas phase oxidation of propane 未知

    公开(公告)号：DE19746210A1

    公开(公告)日：1999-04-22

    申请号：DE19746210

    申请日：1997-10-21

    Applicant: BASF AG

    Inventor： JACHOW HARALD DR ,  TENTEN ANDREAS DR ,  UNVERRICHT SIGNE DR ,  ARNOLD HEIKO DR

    IPC: B01J23/00 ,  C07C45/33 ,  C07C51/215 ,  C07C57/05 ,  C07C57/055 ,  C07C59/66 ,  C07C69/716 ,  C07C69/734 ,  B01J23/882 ,  B01J23/887 ,  C07C45/40 ,  C07C47/22

    Abstract: A novel method of producing acrolein and/or acrylic acid by heterogeneous catalyzed gas phase oxidation of propane, by using two consecutive, stationary beds of catalysts based on different multimetal oxides, and a starting gas mixture containing \- 50 vol.% propane, \- 15 vol.% oxygen and 0 - 35 vol.% inert gas. A mixture of propane, oxygen and optionally inert gas is passed over two stationary catalyst beds at 300 - 500 deg C. The beds are based on different multimetal oxides (A and B) are used. The starting gas mixture contains \- 50 vol.% propane, \- 15 vol.% oxygen and 0 - 35 vol.% inert gas is passed through the catalyst bed A and then B. The active material of the catalyst beds is multimetal oxide(s) of formula (I) in bed A and multimetal oxide(s) of formula (II) in bed B; M aMo1-bM bOx (I) Bia'Mob'X c'X d'X e'X f'X g'X h'Ox' (II) M = cobalt (Co), nickel (Ni), magnesium (Mg), zinc (Zn), manganese (Mn), copper (Cu) and/or tin (Sn); M = tungsten (W), vanadium (V), tellurium (Te), niobium (Nb), phosphorus (P), chromium (Cr), iron (Fe), antimony (Sb), cerium (Ce) and/or lanthanum (La); X = W, V and/or Te; X = alkaline earth metal, Co, Ni, Zn, Mn, Cu, cadmium (Cd), Sn and/or mercury (Hg); X = Fe, Cr and/or Ce; X = P, arsenic (As), Sb and/or boron (B); X = alkali metal, thallium (Tl) and/or Sn; X = a rare earth metal, titanium (Ti), zirconium (Zr), Nb, tantalum (Ta), rhenium (Re), ruthenium (Ru), rhodium (Rh), silver (Ag), gold (Au), aluminum (Al), gallium (In), silicon (Si), germanium (Ge), thorium (Th) and/or uranium (U); a = 0.5 - 1.5; b = 0 - 0.5; a' = 0.01 - 8; b' = 0.1 - 30; c' = 0.1 - 20; d', e' = 0 - 20; f' = 0 - 6; g' = 0 - 4; h' = 0 - 15; x, x' = a number, depending on the valency and content of elements other than oxygen.

    29.
    发明专利
    未知

    公开(公告)号：ES2112591T3

    公开(公告)日：1998-04-01

    申请号：ES95113509

    申请日：1995-08-29

    Applicant: BASF AG

    Inventor： RUPPEL WILHELM DR ,  WEGERLE ULRIKE ,  TENTEN ANDREAS DR ,  HAMMON ULRICH DR

    IPC: B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  B01J23/28 ,  C07B61/00 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055

    Abstract: A process for the catalytic gas-phase oxidation of acrolein to acrylic acid in a multiple contact tube fixed-bed reactor through whose space surrounding the contact tubes only one heat-exchange medium circuit is passed, at elevated temperature on catalytically active multimetal oxides with an acrolein conversion for a single pass of >/=95 mol % and an acrylic acid formation selectivity of >/=90 mol %, which comprises firstly passing the heat-exchange medium through the multiple contact tube fixed-bed reactor longitudinally, considered over the reaction container as a whole, to the contact tubes in cocurrent to the reaction-gas mixture and secondly superposing a transverse flow within the reaction container by means of an arrangement of successive baffles along the contact tubes which leaves passage cross sections free, so as to give a meandrous flow of the heat-exchange medium, seen in longitudinal section through the contact tube bundle, and setting the flow rate of the circulated heat-exchange medium so that its temperature rises by from 2 DEG to 10 DEG C. between the point of entry into the reactor and the point of exit out of the reactor.

    30.
    发明专利
    未知

    公开(公告)号：DE59500906D1

    公开(公告)日：1997-12-04

    申请号：DE59500906

    申请日：1995-08-29

    Applicant: BASF AG

    Inventor： RUPPEL WILHELM DR ,  WEGERLE ULRIKE ,  TENTEN ANDREAS DR ,  HAMMON ULRICH DR

    IPC: B01J23/88 ,  B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  B01J23/887 ,  B01J27/132 ,  B01J27/192 ,  C07B61/00 ,  C07C45/35 ,  C07C47/22

    Abstract: A gas-phase mixture of propene and oxygen is catalytically oxidized by passing a reactant gas mixture comprising propene and oxygen through a plurality of catalyst containing contact tubes in a fixed bed reactor and simultaneously passing only one heat-exchange medium at elevated temperature over the exterior surfaces of the contact tubes in a longitudinal flow pattern which is cocurrent with the direction of flow of the reactants through said tube; simultaneously superposing a transverse flow on said longitudinal flow of heat exchange medium by means of an arrangement of successive baffles along the contact tubes which leave passage cross-sections free, thereby resulting in a meandrous flow of the heat-exchange medium through the reactor and setting the flow rate of said heat-exchange medium so that its temperature between the point of entry of the medium into the reactor and its point of exit increases by 2 DEG to 10 DEG C.; and obtaining product acrolein at a selectivity >/=85 mol % from the reactor at a single pass propene conversion >/=90 mol %.

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