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    21.
    发明专利
    未知

    公开(公告)号：DE19631662A1

    公开(公告)日：1998-02-12

    申请号：DE19631662

    申请日：1996-08-05

    Applicant: BASF AG

    Inventor： HEIDA BERND ,  THIESSEN FRITZ DR ,  HAMMON ULRICH DR

    IPC: B01D17/025 ,  B01D17/02 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055 ,  C07C57/07 ,  C07C57/05 ,  C07D307/32 ,  C07B63/00

    Abstract: In a separator (11), designed to separate mixtures composed of liquids of various densities, the inflow (12) of the liquid mixture is so arranged and so designed that the inflowing liquid mixture hits an inner wall(16), located opposite the separator outflows, at an angle alpha of 0 DEG - 45 DEG relative to the normal to the container wall. Such a separator can be used in the manufacturing process for acrylic acid through catalytic vapour-phase oxidation of propene.

    22.
    发明专利
    未知

    公开(公告)号：DE19631645A1

    公开(公告)日：1998-02-12

    申请号：DE19631645

    申请日：1996-08-05

    Applicant: BASF AG

    Inventor： HEIDA BERND ,  THIESSEN FRITZ DR ,  HAMMON ULRICH DR ,  DAMS ALBRECHT DR

    IPC: C07C51/25 ,  C07C51/48 ,  C07C57/04 ,  C07C57/05 ,  C07C57/07

    Abstract: In the production process for acrylic acid through catalytic vapour-phase oxidation of propene, acrylic acid is separated from the vapour-phase oxidation reaction mixture by means of an absorbing agent containing diphenyl, diphenyl ether or dimethyl phthalate and is also extracted from the vapour-phase oxidation acidic water by means of a solvent containing diphenyl, diphenyl ether or dimethyl phthalate.

    PROCESS OF CATALYTIC OXIDATION OF METHACROLEIN TO METHACRYLIC ACID IN GASEOUS PHASE
    24.
    发明专利
    PROCESS OF CATALYTIC OXIDATION OF METHACROLEIN TO METHACRYLIC ACID IN GASEOUS PHASE 未知

    公开(公告)号：CZ281911B6

    公开(公告)日：1997-03-12

    申请号：CS297492

    申请日：1992-09-29

    Applicant: BASF AG

    Inventor： HAMMON ULRICH DR ,  HERZOG KLAUS DR ,  NEUMANN HANS-PETER DR

    IPC: C07C51/235 ,  B01J27/186 ,  B01J27/188 ,  B01J27/19 ,  B01J27/195 ,  B01J27/199 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055

    Abstract: A process for the catalytic gas-phase oxidation of methacrolein to methacrylic acid in a fixed-bed reactor with contacting tubes, at elevated temperature on catalytically active oxides with a conversion of methacrolein for a single pass of from 40 to 95 mol%, wherein the reaction temperature in the flow direction along the contacting tubes in a first reaction zone from entry of the starting reaction gases containing the reactants into the contacting tubes is from 280 to 340 DEG C. until a methacrolein conversion of from 20 to 40% is reached, and the reaction temperature is subsequently reduced by a total of from 5 DEG to 40 DEG C., abruptly or successively in steps or continuously along the contacting tubes until a methacrolein conversion of from 45 to 95% has been reached, with the proviso that the reaction temperature in this second reaction zone is not lower than 260 DEG C.

    25.
    发明专利
    未知

    公开(公告)号：ES2094862T3

    公开(公告)日：1997-02-01

    申请号：ES92115799

    申请日：1992-09-16

    Applicant: BASF AG

    Inventor： HAMMON ULRICH DR ,  HERZOG KLAUS DR ,  NEUMANN HANS-PETER DR

    IPC: C07C51/235 ,  C07C51/25 ,  C07C57/055

    Abstract: A method for the catalytic gas-phase oxidation of acrolein to acrylic acid in a contact tubular solid bed reactor at elevated temperature on catalytically active oxides with a conversion of the acrolein on a single pass of >/= 95%, in which the reaction temperature in the flow direction along the contact tube in a first reaction zone from entry of the exit reaction gases containing the reactants into the contact tube until a conversion of the acrolein of 20 to 40% is achieved is 260 to 300 DEG C and in which subsequently thereto the reaction temperature is decreased abruptly or in successive steps or continuously along the contact tube until an acrolein conversion of >/= 95% is achieved by a total of 5 to 40 DEG C with the proviso that the reaction temperature in this second reaction zone is not less than 240 DEG C.

    27.
    发明专利
    未知

    公开(公告)号：DE19501325A1

    公开(公告)日：1996-07-25

    申请号：DE19501325

    申请日：1995-01-18

    Applicant: BASF AG

    Inventor： HERBST HOLGER DR ,  NESTLER GERHARD DR ,  HAMMON ULRICH DR

    IPC: C07C57/04 ,  C07C51/44 ,  C07C57/05 ,  C07C57/07

    Abstract: In the sepn. of (meth)acrylic acid (I) from mixts. by rectification, in which (I) is discharged from the column at a point higher than the inlet for the mixt., the refluxing liq. is removed in at least one position of the column, the oligomerised and/or polymerised (I) is sepd. and the liq. is recycled to the column.

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