中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

8 records (took 0.019 seconds)

    Method for the heterogeneously catalysed partial gas phase oxidation of acrolein to form acrylic acid
    5.
    发明专利
    Method for the heterogeneously catalysed partial gas phase oxidation of acrolein to form acrylic acid 未知

    公开(公告)号：ZA200508599B

    公开(公告)日：2007-01-31

    申请号：ZA200508599

    申请日：2005-10-24

    Applicant: BASF AG

    Inventor： MARTIN DIETERLE ,  JOCHEN PETZOLDT ,  HEIKO ARNOLD ,  WILHELM RUPPEL ,  JOACHIM MULLER-ENGEL KLAUS

    IPC: C07C20090101 ,  C07C51/10 ,  C07C51/25

    Abstract: A process for the catalyzed partial gas phase oxidation of acrolein to acrylic acid comprises processing a reaction mixture comprising acrolein, molecular oxygen and at least one inert gas in a molar ratio of O 2 to C 3H 4O of at least 0.5 in a reaction step using a fixed catalyst bed comprising a multi metal oxide containing Mo and V whereby the fixed catalyst bed comprises two separate temperature zones A and B arranged in series. A process for the catalyzed partial gas phase oxidation of acrolein to acrylic acid comprises processing a reaction mixture comprising acrolein, molecular oxygen and at least one inert gas in a molar ratio of O 2 to C 3H 4O of at least 0.5 in a reaction step using a fixed catalyst bed. The catalyst comprised a multi metal oxide containing Mo and V whereby the fixed catalyst bed comprises two separate temperature zones A and B arranged in series. The temperature zones are maintained at 230-320[deg]C, such that the volume specific activity within a fixed catalyst zone is essentially constant and has a step-wise increase in the flow direction of the aqueous reaction mixture by transfer from one fixed catalyst zone to the other. A conversion of 45-85 mol.% acrolein is achieved in zone A; an acrolein conversion of at least 90 mol.% with selectivity to acrylic acid of at least 90 mol.% achieved by a single pass through the total fixed catalyst bed with flow through A followed by B. The catalyst bed loading of acrolein is at least 70 Nl acrolein per liter of catalyst bed per hour; the difference between the maximum temperatures in both zones A and B is at least 0[deg]C; whereby the transition from temperature zone A to temperature zone B does not occur with a transfer from one fixed catalyst zone to another fixed catalyst zone.

    CATALYTIC GAS-PHASE OXIDATION OF ACROLEIN TO ACRYLIC ACID
    7.
    发明专利
    CATALYTIC GAS-PHASE OXIDATION OF ACROLEIN TO ACRYLIC ACID 未知

    公开(公告)号：MY112478A

    公开(公告)日：2001-06-30

    申请号：MYPI19952645

    申请日：1995-09-07

    Applicant: BASF AG

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

    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 MOLAND AN ACRYLIC ACID FORMATION SELECTIV-ITY OF > 90 MOL , WHICH COMPRISES FIRSTLY PASSING THE HEAT-EXCHANGE MEDIUM THROUGH THE MULTIPLE CONTACT TUBE FIXED-BED REACTOR LONGITUDINALLY, CONSIDERED O.VER 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 TO L0?C BETWEEN THE POINT OF ENTRY INTO THE REACTOR AND THE POINT OF EXIT OUT OF THE REACTOR.

    Partial oxidation of propene for manufacture of acrolein, involves passing reaction mixture over catalyst bed having preset temperature zones whose transition is different from transition between preset fixed catalyst bed zones
    8.
    发明专利
    Partial oxidation of propene for manufacture of acrolein, involves passing reaction mixture over catalyst bed having preset temperature zones whose transition is different from transition between preset fixed catalyst bed zones 未知

    公开(公告)号：DE10313210A1

    公开(公告)日：2004-10-07

    申请号：DE10313210

    申请日：2003-03-25

    Applicant: BASF AG

    Inventor： PETZOLDT JOCHEN ,  DIETERLE MARTIN ,  ARNOLD HEIKO ,  WILHELM RUPPEL ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07C17/35 ,  C07C51/25 ,  C07C47/22 ,  C07C27/14

    Abstract: A mixture of propene, molecular oxygen and inert gas, is passed over a fixed catalyst bed having temperature zones (A,B) maintained at 290-380 [deg] C. The fixed catalyst bed has two fixed catalyst bed zones having preset volume-specific activity. The transition from zone A to zone B in fixed catalyst bed do not coincide with transition from one fixed catalyst bed zone to another. The partial oxidation of propene in gaseous phase is performed in presence of heterogeneous catalyst. A reaction gas mixture comprising propene, molecular oxygen and at least one inert gas is passed over a fixed catalyst bed containing at least one multimetal oxide comprising molybdenum, iron and bismuth. The molar ratio of molecular oxygen and propene is = 1. The fixed catalyst bed is arranged in two spatially successive temperature zones (A,B), both maintained at 290-380 [deg] C. The fixed catalyst bed consists of at least two spatially successive fixed catalyst bed zones. The volume-specific activity within one fixed catalyst bed zone is substantially constant and increases sharply in the flow direction of the reaction gas mixture at the transition from one fixed catalyst bed zone to another fixed catalyst bed zone. The temperature zone (A) extends up to a conversion of propene of 40-80 mol%. On single pass of the starting reaction gas mixture through the entire fixed catalyst bed, the propene conversion is >=90 mol% and the selectivity of acrolein formation based on converted propene is >=90 mol %. The sequence in time in which the reaction gas mixture flows through the temperature zones (A,B) corresponds to the alphabetic sequence of the temperature zones. The hourly space velocity of the propene contained in the reaction gas mixture on the fixed catalyst bed is >= 90 I(STP) of propene/I of fixed bed catalyst.h. The difference (TmaxA-TmaxB) between the highest temperature (TmaxA) of reaction gas mixture in zone A, and the highest temperature (TmaxB) of reaction gas mixture in zone B, is >=0 [deg] C. The transition from temperature zone A to temperature zone B in the fixed catalyst bed do not coincide with a transition from one fixed catalyst bed zone to another fixed catalyst bed zone.

Patent Agency Ranking