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    54.
    发明专利
    未知

    公开(公告)号：DE2650888A1

    公开(公告)日：1978-05-11

    申请号：DE2650888

    申请日：1976-11-06

    Applicant: BASF AG

    Inventor： MERGER FRANZ DR ,  NESTLER GERHARD DR

    IPC: C07C43/23 ,  B01J31/00 ,  C07B61/00 ,  C07C27/00 ,  C07C37/14 ,  C07C39/15 ,  C07C41/00 ,  C07C67/00 ,  C07C39/00 ,  C07C39/02

    Abstract: Alkylphenol compounds are manufactured by continuous reaction of phenolic compounds with olefins in the presence of a pulverulent polystyrenesulfonic acid exchanger suspended in the reaction mixture. The products are starting materials for the manufacture of dyes, pesticides, pharmaceuticals, emulsifiers, dispersing agents, stabilizers, antioxidants, plasticizers, corrosion inhibitors, disinfectants, seed dressings, aging inhibitors, crop protection agents and scents.

    Emergency injection of an inhibitor into a chemical reaction
    57.
    发明专利
    Emergency injection of an inhibitor into a chemical reaction 未知

    公开(公告)号：DE19749859A1

    公开(公告)日：1998-07-30

    申请号：DE19749859

    申请日：1997-11-11

    Applicant: BASF AG

    Inventor： FRIED MICHAEL DR ,  NESTLER GERHARD DR

    IPC: B01J4/00 ,  B01J19/00

    Abstract: The invention relates to a device for feeding a fluid into a container comprising a delivery device which leads into the inner space (5) of the container (1), is closed with a rupture disk (18), and is connected to a delivery line for the fluid. In order to increase the operational safety and to avoid an over application of pressure on the rupture disk, the delivery device is designed as a telescopic tube (4) which can telescope into the inner space (5) of the container (1) by means of the pressure of the fluid and is mounted above the highest filling level of the container (1).

    58.
    发明专利
    未知

    公开(公告)号：DE19648746A1

    公开(公告)日：1998-05-28

    申请号：DE19648746

    申请日：1996-11-25

    Applicant: BASF AG

    Inventor： AICHINGER HEINRICH DR ,  FRIED MICHAEL DR ,  NESTLER GERHARD DR

    IPC: C07C67/08 ,  C07C67/58 ,  C07C69/54 ,  C07C67/48 ,  B01J38/48

    Abstract: Method for producing (meth)acrylic acid esters by reacting (meth)acrylic acid with a C4-C12-alkanol in the presence of sulfuric acid or sulfuric acid mono C4-C12-alkyl ester as a catalyst, wherein A) the reaction is carried out in an esterification unit comprising a first reactor and at least one other reactor, B) the first reactor is loaded with a mixture of (meth)acrylic acid, C4-C12-alkanol and a catalyst, said mixture containing no more than 5 wt.% of water in relation to the sum of the starting materials, C) esterification is carried out in the first reactor without removing ester, alkanol or water until (meth)acrylic acid reaction of at least 40 % is obtained, as long as the mixture remains single phase, and D) esterification is continued in at least one other reactor in which the water formed is removed by distillation.

    60.
    发明专利
    未知

    公开(公告)号：DE19604253A1

    公开(公告)日：1997-08-07

    申请号：DE19604253

    申请日：1996-02-06

    Applicant: BASF AG

    Inventor： SCHMIDT WILLI ,  GEISENDOERFER MATTHIAS DR ,  DOCKNER TONI DR ,  HERBST HOLGER DR ,  NESTLER GERHARD DR ,  WECK ALEXANDER DIPL ING

    IPC: C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54 ,  B01J31/02

    Abstract: In the continuous production of alkyl (meth)acrylates (AA) by reacting (meth)acrylic acid with 1-8 carbon (C) monohydric alkanols in homogeneous liquid phase, free from solvent, at elevated temperature and in the presence of an acid esterification catalyst; (a) (meth)acrylic acid, alkanol and catalyst are fed to a reaction zone; (b) during a residence time, the water formed is separated in a rectification unit (RU) III above the reaction zone; (c) the aqueous distillate is separated into an organic phase containing the alkanol and an aqueous phase; (d) the organic phase is recycled to RU III; and (e) the reaction mixture is discharged from the reaction zone and passed to another RU, where AA is separated by distillation. The novel features are that: (i) the molar ratio of (meth)acrylic acid and alkanol is 1:(0.75-2); (ii) the aqueous phase from RU III is partly recycled to RU III; (iii) the reaction mixture is passed to RU I, in which it is separated into a product (II) containing the catalyst and a product (I) containing AA, residual alkanol and residual (meth)acrylic acid; and (iv) (I) is passed to RU II, in which AA is separated from residual alkanol and residual (meth)acrylic acid and the alkanol and acid are recycled to the reaction zone. Preferably the alkanol is 2-ethylhexanol. The catalyst is para-toluenesulphonic acid (p-TSA) and/or other organic sulphonic acids, e.g. methane-, benzene- or dodecylbenzene-sulphonic acid, and/or sulphuric acid (H2SO4). The catalyst concentration in the reaction mixture is 0.1-10, especially 0.1-6 wt.% p-TSA in the reaction zone and 2.5-50 wt.% p-TSA in the sump or an equimolar amount of organic sulphonic acid and/or H2SO4. The reaction zone consists of a cascade of NOTLESS 2, especially 2-4 consecutive sections, especially reactors with circulating vapourisers. All rectification units are rectification columns.

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