中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

82 records (took 0.023 seconds)

    Multi:metal oxide useful as catalyst esp. in gas phase oxidn. of acrolein to acrylic acid
    53.
    发明专利
    Multi:metal oxide useful as catalyst esp. in gas phase oxidn. of acrolein to acrylic acid 未知

    公开(公告)号：DE4440891A1

    公开(公告)日：1996-05-23

    申请号：DE4440891

    申请日：1994-11-17

    Applicant: BASF AG

    Inventor： TENTEN ANDREAS DR ,  HIBST HARTMUT DR ,  MARTIN FRIEDRICH-GEORG DR ,  MAROSI LASZLO DR ,  KOHL VERONIKA DR

    IPC: B01J23/00 ,  B01J23/885 ,  B01J23/887 ,  B01J35/00 ,  C07C51/25 ,  C07C57/055 ,  C01G1/02 ,  B01J21/00 ,  C01G39/00 ,  C01G41/00

    Abstract: Multimetal oxide compsn. of formula (I) is new: (A)p (B)q (I): A = Mo12VaX bX cX dX eX fX gOx (co-phase); B = X 12CuhHiOy (key phase); X = W, Nb, Ta, Cr and/or Ce; X = Cu, Ni, Co, Fe, Mn and/or Zn; X = Sb and/or Bi; X = Li, Na, K, Rb, Cs and/or H; X = Mg, Ca, Sr and/or Ba; X = Si, Al, Ti and/or Zr; X = Mo, W, V, Nb and/or Ta; a = 1-8; b = 0.2-5; c = 0-23; d, g = 0-50; e = 0-2; f = 0-5; h = 4-30; i = 0-20; x, y = values depending on the valency and content of elements other than O; p, q = values other than O, with the ratio p/q = 160:1 to 1:1. The A and B fractions are each in the form of 30 zones, which differ in chemical compsn. from their local surroundings, and the relative distribution of the A and B zones is as in a mixt. of finely-divided A and finely-divided B. Also claimed are multimetal oxide compsns. of wolframite structural type, of formulae (II), (III), (IV) and (V): in (II), 1/(A+B+C+D+E) = 0.7-1.3; F = 0-1; and B+C+D+E = over 0 to 1. In (III), 1/(A+B+C) = 0.7-1.3; A, B, C all = more than O and B+C = at most 1; In (IV), 1/(A+B) = 0.7-1.3; A, B both = more than O and B = at most 1; In (V), 1/(A+C) = 0.7-1.3; A, C both more than O and C at most 1.

    ACROLEIN CATALYTIC OXIDATION PROCESS TO ACRYLIC ACID IN A GASEOUS PHASE
    54.
    发明专利
    ACROLEIN CATALYTIC OXIDATION PROCESS TO ACRYLIC ACID IN A GASEOUS PHASE 未知

    公开(公告)号：CZ229495A3

    公开(公告)日：1996-03-13

    申请号：CZ229495

    申请日：1995-09-07

    Applicant: BASF AG

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

    IPC: B01J23/28 ,  B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  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.

    56.
    发明专利
    未知

    公开(公告)号：DE4405058A1

    公开(公告)日：1995-08-24

    申请号：DE4405058

    申请日：1994-02-17

    Applicant: BASF AG

    Inventor： MARTIN FRIEDRICH-GEORG DR ,  HIBST HARTMUT DR ,  TENTEN ANDREAS DR

    IPC: C01G1/00 ,  B01J23/88 ,  B01J23/885 ,  B01J27/14 ,  B01J27/195 ,  B01J27/199 ,  B01J35/00 ,  C01G1/02 ,  C01G39/00 ,  C07B61/00 ,  C07C51/25 ,  C07C57/055

    Abstract: Multimetal oxide compsn. of formula (I) is new: (A)p(B)q(I): A = Mo12X aX bX cX dSeX fO x; B = X 12CugX hOy; X = P, As, B, Ge and/or Si; X = V, Nb and/or W; X = H, up to 97 mole-% of which may be replaced by K, Rb, Cs and/or NH4; X = Sb and/or Bi; X = Re and/or Rh; X = Mp, W, Nb and/or Ta; X = Li, Na, K, Rb, Cs and/or NH4; a = 1-6; b, d = 0-6; c = 3-5; e, f = 0-3; g = 4-24; h = 0-20; x, y = values depending on the valency and content of elements other than O; p, q = values other than O, with the ratio p/q = 12:0.1 to 12:48. The A and B fractions are each in the form of 3D zones, which differ in chemical compsn. from their local surroundings, and the relative distribution of the A and B zones is as in a mixt. of finely-divided A and finely-divided B.

    Process for the catalytic gas-phase oxidation of propene to acrolein
    57.
    发明专利
    Process for the catalytic gas-phase oxidation of propene to acrolein 未知

    公开(公告)号：DE4431957A1

    公开(公告)日：1995-03-16

    申请号：DE4431957

    申请日：1994-09-08

    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 process for the catalytic gas-phase oxidation of propene to acrolein in a multiple contact tube fixed-bed reactor, with only one heat transfer medium being circulated through the space surrounding the contact tubes, at elevated temperature over catalytically active multimetal oxides at a propene conversion on a single pass of >/= 90 mol% and a selectivity of acrolein formation of >/= 85 mol%, in which the heat exchange medium on the one hand is passed longitudinally, viewed over the reaction vessel, to the contact tubes in cocurrent to the reaction gas mixture through the multiple contact tube fixed-bed reactor and, on the other hand, has, within the reaction vessel, due to a successive arrangement, along the contact tubes, of deflecting discs which leave open cross-sections free, a superposed crossflow in such a way that, in longitudinal section through the contact tube bundle, a meander-like flow of the heat exchange medium results and the flow velocity of the circulated heat exchange medium is here set in such a way that the temperature of the heat exchange medium rises by from 2 to 10 DEG C from the inlet point to the reactor to the outlet point from the reactor.

    METHOD FOR PRODUCING MALEIC ACID ANHYDRIDE
    59.
    发明专利
    METHOD FOR PRODUCING MALEIC ACID ANHYDRIDE 未知

    公开(公告)号：MY128287A

    公开(公告)日：2007-01-31

    申请号：MYPI20010925

    申请日：2001-03-01

    Applicant: BASF AG

    Inventor： WEIGUNY JENS DR ,  STORCK SEBASTIAN DR RER NAT ,  TENTEN ANDREAS DR ,  RUPPEL WILHELM DR

    IPC: C07D307/60 ,  B01J27/28 ,  B01J38/04 ,  C07B61/00 ,  C07C51/215

    Abstract: IN A PROCESS FOR PREPARING MALEIC ANHYDRIDE BY HETEROGENEOUSLY CATALYZED GAS-PHASE OXIDATION OF HYDROCARBONS HAVING AT LEAST FOUR CARBON ATOMS USING OXYGEN-CONTAINING GASES IN THE PRESENCE OF A VOLATILE PHOSPHORUS COMPOUND OVER A CATALYST COMPRISING VANADIUM, PHOSPHORUS AND OXYGEN IN A SHELL-AND-TUBE REACTOR UNIT (2) HAVING AT LEAST TWO SUCCESSIVE COOLED REACTION ZONES, THE TEMPERATURE OF THE FIRST REACTION ZONE IS FROM 350 TO 450°C. AND THE TEMPERATURE OF THE SECOND AND FURTHER REACTION ZONES IS FROM 350 TO 480°C. AND THE TEMPERATURE DIFFERENCE BETWEEN THE HOTTEST REACTION ZONE AND THE COOLEST REACTION ZONE IS AT LEAST 2°C.(FIG 1A)

Patent Agency Ranking