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    74.
    发明专利
    未知

    公开(公告)号：BRPI0416081B1

    公开(公告)日：2014-08-19

    申请号：BRPI0416081

    申请日：2004-10-08

    Applicant: BASF AG

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

    IPC: C07C51/25 ,  C07C57/04

    Abstract: A process for the long-term operation of a heterogeneously catalyzed gas phase partial oxidation of acrolein to acrylic acid, in which the temperature of the fixed catalyst bed is increased over time and partial oxidation is interrupted and an oxygen-containing gas is conducted through the fixed catalyst bed before the temperature increase is 8° C.

    76.
    发明专利
    未知

    公开(公告)号：BRPI0607493A2

    公开(公告)日：2010-04-06

    申请号：BRPI0607493

    申请日：2006-03-01

    Applicant: BASF AG

    Inventor： HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM ,  DIETERLE MARTIN ,  ADAMI CHRISTOPH

    IPC: C07C51/43 ,  C07C57/04

    Abstract: Disclosed is a method for eliminating methacrylic acid from a liquid phase (P) containing acrylic acid as a main component and target product and methacrylic acid as a secondary component. According to said method, the methacrylic acid is eliminated using crystallization, the acrylic acid accumulating in the formed crystallized product and the methacrylic acid accumulating in the remaining mother liquor.

    Heterogeneously-catalyzed partial direct oxidation of n-propane to acrylic acid comprises conducting initial reaction gas mixture comprising n-propane and molecular oxygen through a fixed bed catalyst and separating the acrylic acid
    79.
    发明专利
    Heterogeneously-catalyzed partial direct oxidation of n-propane to acrylic acid comprises conducting initial reaction gas mixture comprising n-propane and molecular oxygen through a fixed bed catalyst and separating the acrylic acid 未知

    公开(公告)号：DE102007029053A1

    公开(公告)日：2008-01-03

    申请号：DE102007029053

    申请日：2007-06-21

    Applicant: BASF AG

    Inventor： DIETERLE MARTIN ,  HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07C57/05 ,  C07C57/07

    Abstract: Heterogeneously-catalyzed partial direct oxidation of n-propane to acrylic acid, comprises: conducting an initial mixture of reaction gases, which contain n-propane, molecular oxygen and at least an inert diluent gas, at elevated temperature through a fixed bed catalyst; subsequently transferring the obtained product gas containing acrylic acid into a first separation zone, in which the product gas is transferred into the liquid phase; separating the acrylic acid from the liquid phase in a second separation zone by at least a thermal separation procedure. Heterogeneously-catalyzed partial direct oxidation of n-propane to acrylic acid, comprises: conducting an initial mixture of reaction gases, which contain n-propane, molecular oxygen and at least an inert diluent gas, at elevated temperature through a fixed bed catalyst having a catalyst in a solid physical state, where the conversion of n-propane in the case of a single passage of the reaction gases through the catalyst bed amounts to >=10 mol.% and the selectivity of the acrylic acid formation, relative to the converted n-propane, amounts to >=40 mol.%; subsequently transferring the obtained product gas containing acrylic acid into a first separation zone, in which the product gas is transferred into the liquid phase; separating the remaining gases that contain n-propane and is depleted of acrylic acid, from the first separation zone; refluxing at least a partial quantity of the n-propane contained in the remaining product in the form of a gas to the reaction step; separating the acrylic acid from the liquid phase in a second separation zone by at least a thermal separation procedure. The initial mixture of reaction gases contains 2-50 vol.% of n-propane, 0.1-60 vol.% of carbon dioxide, 1-50 vol.% oxygen and 1-50 vol.% of water, related to its total volume, and up to 1 mol.% of cyclo-propane, related to the molar volume of n-propane contained in the initial mixture of reaction gases, The thermal separation process in the second separation zone comprises the separation of the acrylic acid by means of at least a crystallization step.

    Heterogeneously catalyzed partial dehydrogenation of hydrocarbon, comprises conducting a reaction gas mixture input stream comprising hydrocarbons, with molecular oxygen and molecular hydrogen through a fixed catalyst bed
    80.
    发明专利
    Heterogeneously catalyzed partial dehydrogenation of hydrocarbon, comprises conducting a reaction gas mixture input stream comprising hydrocarbons, with molecular oxygen and molecular hydrogen through a fixed catalyst bed 未知

    公开(公告)号：DE102006017623A1

    公开(公告)日：2007-10-18

    申请号：DE102006017623

    申请日：2006-04-12

    Applicant: BASF AG

    Inventor： HECHLER CLAUS ,  RUPPEL WILHELM ,  GERLINGER WOLFGANG ,  SCHNEIDER WOLFGANG ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07B35/04 ,  C07B41/00 ,  C07C5/32 ,  C07C5/333 ,  C07C11/06 ,  C07C45/33 ,  C07C47/22 ,  C07C51/215 ,  C07C53/08 ,  C07C57/05

    Abstract: Process for heterogeneously catalyzed partial dehydrogenation of a hydrocarbon, comprises conducting a reaction gas mixture input stream comprising hydrocarbons, with molecular oxygen and molecular hydrogen through a fixed catalyst bed; filling inert shaped bodies and then catalyst shaped body in the flow direction of input stream; conditioning the input stream with an activation energy in its inlet area for the combustion reaction of molecular hydrogen with molecular oxygen; and dehydrogenating at least a partial quantity of hydrocarbon. Process for heterogeneously catalyzed partial dehydrogenation of a hydrocarbon, comprises conducting a reaction gas mixture input stream comprising a hydrocarbon to be dehydrogenated, with molecular oxygen and molecular hydrogen through a fixed catalyst bed, which is disposed in a shaft with predetermined cross section; filling inert shaped bodies and then catalyst shaped body in the flow direction of input stream; conditioning the input stream with an activation energy in its inlet area for the combustion reaction of molecular hydrogen with molecular oxygen to water and/or combustion reaction of hydrocarbon with molecular oxygen to carbon monoxide and water; dehydrogenating at least a partial quantity of hydrocarbon, by which the reaction gas mixture input stream is generated inside the shaft; dosing the molecular hydrogen with a volume flow (V1) and an input stream (I) containing at least one dehydrating hydrocarbon on the fixed catalyst bed, before the catalyst bed is dosed with input stream (II) containing molecular oxygen with a total volume flow (V2), where the input stream (II) is dosed in large number through outlet openings (A) present in the flow direction of the input stream (I), in such a manner that, (a) the direction of the majority (M) of input stream (II) from all the outlet openings (in the absence of input stream (I)) exhibits an angle of 90+-60[deg]; (b) the distance (D) of the majority of all outlet openings from the fixed catalyst bed, in relation to the flow speed (W) of the input stream (I) in the shaft, is = the induction time (J) of the reaction gas input mixture multiplied with 2.W; (c) by a projection of the focal points of a majority of all outlet openings in the flow stream direction of the input gas stream (I) in the projection level vertical to the flow stream direction of the input gas stream (I), within the projection level for at least 75% of the projection surfaces, which are held by the input gas stream (I), the number (ZA) amounts to >= 10 in any considered surface m 2> in which one finds outlet opening focal points; (d) the number (ZA) amounts to focal points of the outlet opening, from which the number of emerging individual input stream (II) does not deviate by more than 50% of its average; (e) within the number (ZA) of all outlet openings, a distance (D) between one outlet opening focal point and the next outlet opening focal point, is not more than the equation 2.(lm 2>/ZA) 1> > 2>; and (f) the ratio of V1:V2 amounts to >= 8.

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