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    Gas phase oxidation of propylene to acrylic acid using ring-shaped multi-metal oxide catalyst of specified geometry to maximize selectivity and space-time yield
    31.
    发明专利
    Gas phase oxidation of propylene to acrylic acid using ring-shaped multi-metal oxide catalyst of specified geometry to maximize selectivity and space-time yield 未知

    公开(公告)号：DE19948248A1

    公开(公告)日：2001-04-12

    申请号：DE19948248

    申请日：1999-10-07

    Applicant: BASF AG

    Inventor： UNVERRICHT SIGNE ,  ARNOLD HEIKO ,  TENTEN ANDREAS ,  HAMMON ULRICH ,  NEUMANN HANS-PETER ,  HARTH KLAUS

    IPC: C07C45/35 ,  B01J23/28 ,  B01J23/30 ,  B01J23/31 ,  B01J23/887 ,  B01J23/888 ,  B01J27/057 ,  C07C47/22

    Abstract: Gas phase oxidation of propylene into acrylic acid in which the mixture of reaction gas is oxidized on a first fixed-bed catalyst and the mixture of product gas which contain acrolein oxidized on a second fixed-bed catalyst. The catalyst shaped bodies comprise an annular geometry in both reaction steps. Gas-phase oxidation of propylene in a one-stage reaction to acrolein and/or acrylic acid or in a two-stage reaction to acrylic acid is such that (i) the initial charge in both cases is \- 160 Nl propylene/l catalyst hour; (ii) the charge to the 2nd stage (if used) includes \- 140 NL acrolein/l catalyst hour ; and (iii) the catalyst or catalysts is/are of ring form with an outer diameter 2-11 mm, length 2-11 mm and a wall-thickness 1-5 mm. The process comprises (A) feeding a mixture of propylene, molecular oxygen and an inert gas with molar ratio O2 : C3H6 \- 1 at high temperature over a solid bed catalyst with characteristics (i) and (iii) above and comprising a multi-metal oxide containing Mo and/or W together with Bi, Te, Sb, Sn and/or Cu such that the propylene conversion and the combined selectivity for acrolein and the acrylic acid by-product are both \- 90 mol.%; and optionally (B) cooling the acrolein-containing gas product and optionally adding molecular O2 and/or inert gas prior to passing it at high temperature and with molar ratio O2 : acrolein \- 0.5 over a Mo- and V-containing multi-metal oxide solid bed catalyst such that the acrolein conversion is \- 90 mol.% and the combined two-stage acrylic acid selectivity (based on propylene conversion) is \- 80 mol.%.

    Multi-tube fixed-bed reactor, especially for catalytic gas phase reactions
    32.
    发明专利
    Multi-tube fixed-bed reactor, especially for catalytic gas phase reactions 未知

    公开(公告)号：AU4538700A

    公开(公告)日：2000-10-04

    申请号：AU4538700

    申请日：2000-03-15

    Applicant: BASF AG

    Inventor： OLBERT GERHARD ,  CORR FRANZ ,  REUTER PETER ,  WAMBACH LUDWIG ,  HAMMON ULRICH

    IPC: B01J8/06 ,  B01J19/00 ,  B01J19/24 ,  C07C45/35 ,  C07C45/38 ,  H01Q21/08 ,  B01J8/00

    Abstract: A multitube fixed bed reactor and the use of such a reactor for carrying out catalytic gas-phase reactions, in particular for carrying out exothermic and endothermic catalytic gas-phase reactions such as the preparation of phthalic anhydride (PA), acrylic acid, methacrylic acid (MAA), acrolein, maleic anhydride (MA), glyoxal, phosgene, hydrocyanic acid or vinyl formamide (VFA). In a relatively large multitube reactor in which a large amount of heat of reaction is generated owing to the numerous catalyst tubes ( 17 ) and has to be removed, it is proposed that the ratio of tube spacing t to external tube diameter d a be made dependent on the reactor diameter or on the external tube bundle diameter d RBa . At an external diameter of the catalyst tube bundle ( 18 ) of more than 4 meters, a ratio of tube spacing d to external tube diameter d a of at least 1.3 is preferred.

    33.
    发明专利
    未知

    公开(公告)号：DE59507043D1

    公开(公告)日：1999-11-18

    申请号：DE59507043

    申请日：1995-12-01

    Applicant: BASF AG

    Inventor： HERBST HOLGER ,  NESTLER GERHARD ,  HAMMON ULRICH ,  DARLINGTON JERRY

    IPC: C07C57/055 ,  C07C51/44 ,  C07C51/46 ,  C07C57/07 ,  C07C57/075 ,  C07C57/04

    Abstract: A process for the sepn. of (meth)acrylic acid (I) from a mixt. contg. (a) (I), (b) inert, hydrophobic organic liq. with a higher b.pt. than (I) as main component and (c) lower aldehydes as minor components, comprises rectification with the addn. of a prim. amine and/or salts thereof (II). Also claimed are processes for the prodn. of (I) by gas-phase oxidn. of a 3C/4C starting material (III). Pref. liq. (b) contains diphenyl ether (DPE), and pref. comprises a mixt. of 70-75 wt.% DPE and 25-30 wt.% biphenyl contg. 0.1-25 wt.% (w.r.t. the mixt.) of dimethyl o-phthalate. Amine (II) is a hydrazine deriv., pref. the hydrazide of a carboxylic acid, esp. pref. adipic acid dihydrazide.

    MIXING DEVICE FOR LIQUIDS
    35.
    发明专利
    MIXING DEVICE FOR LIQUIDS 未知

    公开(公告)号：CA2261631A1

    公开(公告)日：1998-02-12

    申请号：CA2261631

    申请日：1997-08-04

    Applicant: BASF AG

    Inventor： HAMMON ULRICH ,  THIESSEN FRITZ ,  HEIDA BERND

    IPC: B01D53/14 ,  B01F27/91 ,  C07B63/00 ,  C07C51/25 ,  C07C57/04 ,  C07C57/05 ,  C07C57/07 ,  B01F7/18

    Abstract: Mixing device for the blending of at least two liquid phases, containing a housing (1) with an inside diameter D, in which at least one agitator (2) is equipped with two to five segment shaped blades presenting a radius of curvature K, in which the circular area inside the housing (1), covered by the rotating agitators, has a diameter E, and in which K ranges from 0.10*D to 0.30*D, preferably from 0.125*D to 0.25*D, and E ranges from 0.35*D to 0.65*D, preferably from 0.45*D to 0.55*D.

    36.
    发明专利
    未知

    公开(公告)号：ID17005A

    公开(公告)日：1997-11-27

    申请号：ID972712

    申请日：1997-08-05

    Applicant: BASF AG

    Inventor： HEIDA BERND ,  THIESSEN FRITZ ,  HAMMON ULRICH

    IPC: B01F27/91 ,  B01D53/14 ,  C07B63/00 ,  C07C51/25 ,  C07C57/04 ,  C07C57/05 ,  C07C57/07

    Abstract: Mixing device for the blending of at least two liquid phases, containing a housing (1) with an inside diameter D, in which at least one agitator (2) is equipped with two to five segment shaped blades presenting a radius of curvature K, in which the circular area inside the housing (1), covered by the rotating agitators, has a diameter E, and in which K ranges from 0.10*D to 0.30*D, preferably from 0.125*D to 0.25*D, and E ranges from 0.35*D to 0.65*D, preferably from 0.45*D to 0.55*D.

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