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    SELF-SUPPORTING STIRRER
    1.
    发明专利
    SELF-SUPPORTING STIRRER 未知

    公开(公告)号：AU534835B2

    公开(公告)日：1984-02-16

    申请号：AU6426080

    申请日：1980-11-11

    Applicant: BASF AG

    Inventor： LENART WOLFGANG ,  RAU WOLFGANG ,  BARON HUBERTUS

    IPC: B01F7/00 ,  B01F15/00 ,  B01J8/10 ,  F16C23/00 ,  B01F7/16 ,  C08F2/00

    Abstract: In a self-supporting stirrer for mixing a bed of free-flowing solids, the lower end of the stirring device, facing the bottom of the stirred vessel, passes into a hub. The hub is located on a vertical drive shaft which extends through the bottom of the stirred vessel and consists of shaft sections detachably joined to one another. The drive shaft itself is carried in a cage attached to the bottom of the stirred vessel and can be adjusted vertically by means of a lifting device. This opens or closes an annular gap between a centering cone, provided at the bottom of the stirred vessel, and a conically recessed ring, inserted in the hub. In this way, the need to empty the vessel, for example when carrying out maintenance or repair work, is avoided.

    Improvements in the production of chloralkyl esters of acrylic acid and its substitution products
    3.
    发明专利
    Improvements in the production of chloralkyl esters of acrylic acid and its substitution products 未知

    公开(公告)号：GB891638A

    公开(公告)日：1962-03-14

    申请号：GB1152460

    申请日：1960-04-01

    Applicant: BASF AG

    Inventor： BARON HUBERTUS ,  FRIEDERICH HERBERT

    IPC: C07C67/24 ,  C07C67/26 ,  C07C69/653 ,  C08F20/22 ,  C08F20/28

    Abstract: The invention comprises (4-chlor-n-butoxy)-n-butyl acrylate, 2,2-dimethyl-3-chlorpropyl acrylate, 2-(tris-chlormethyl)-ethyl acrylate and 2-chlorethoxyethyl acrylate. Chloralkyl esters of acrylate acid are made by reacting an acrylic acid chloride, which may be substituted in alpha- or beta-position by halogen or an alkyl radical containing 1 to 4 carbon atoms, with a cyclic ether containing only carbon and oxygen in a ring of at least 4 atoms, in the presence of an acid-reacting catalyst. Suitable cyclic ethers are trimethylene oxide, 3,3-dimethyl-trimethyleneoxide, 3,3 - bis - (chlormethyl) - oxa - cyclobutane, tetrahydrofurane, tetrahydropyran, dihydropyran, and dioxane. Besides acrylic acid chloride, a-chlor- and a-brom-acrylic acid chlorides, methacrylic acid chloride, crotonic acid chloride and b-methylcrotonic acid chloride are mentioned. Acid reacting catalysts are aluminium chloride, tin tetrachloride, sulphuric acid or concentrated hydrochloric acid. The reaction proceeds to completion in the temperature range between 20 DEG C. and 150 DEG C. In order to avoid premature polymerization, it is advantageous to discontinue the reaction when a 50% to 70% conversion is attained and to distil off and re-use unreacted material. Continuous operation may be employed

    Production of chloralkyl esters of acrylic acid and substitution products thereof
    5.
    发明专利
    Production of chloralkyl esters of acrylic acid and substitution products thereof 未知

    公开(公告)号：GB886649A

    公开(公告)日：1962-01-10

    申请号：GB728559

    申请日：1959-03-03

    Applicant: BASF AG

    Inventor： BARON HUBERTUS ,  FRIEDERICH HERBERT

    IPC: C07C67/26 ,  C08F20/22 ,  C08F20/28

    Abstract: The invention comprises acrylic acid-1-chlor-3-ethoxypropyl ester-(2), and acrylic acid-1-chlorpropylester-(2). Chloralkyl esters of acrylic acid which may be substituted in the alpha-position by halogen or in alpha or beta-position by a methyl radical are made by reacting an acrylic acid chloride which may be substituted in the alpha-position by halogen or in alpha or beta-position by a methyl radical with an epoxide, preferably in the presence of an acid-reacting catalyst such as Friedel-Crafts catalysts. Suitable epoxides are epichlorhydrin, alkylene oxides of 2 to 3 carbon atoms, styrene oxide, alkyl or aryl glycidol ethers, and glycidol esters. In general, the reaction is effected in the temperature range between 20 DEG C. and 150 DEG C. Solvents such as chlorinated hydrocarbons or benzene may be used if desired. It is preferred to discontinue reaction at 50% to 70% conversion to avoid polymerization. The products may be purified by distillation under reduced pressure and stabilized with phenothiazine or hydroquinone.

    9.
    发明专利
    未知

    公开(公告)号：FR1218142A

    公开(公告)日：1960-05-09

    申请号：FR788079

    申请日：1959-03-02

    Applicant: BASF AG

    Inventor： BARON HUBERTUS ,  FRIEDERICH HERBERT

    IPC: C07C67/26 ,  C08F20/22 ,  C08F20/28

    Abstract: The invention comprises acrylic acid-1-chlor-3-ethoxypropyl ester-(2), and acrylic acid-1-chlorpropylester-(2). Chloralkyl esters of acrylic acid which may be substituted in the alpha-position by halogen or in alpha or beta-position by a methyl radical are made by reacting an acrylic acid chloride which may be substituted in the alpha-position by halogen or in alpha or beta-position by a methyl radical with an epoxide, preferably in the presence of an acid-reacting catalyst such as Friedel-Crafts catalysts. Suitable epoxides are epichlorhydrin, alkylene oxides of 2 to 3 carbon atoms, styrene oxide, alkyl or aryl glycidol ethers, and glycidol esters. In general, the reaction is effected in the temperature range between 20 DEG C. and 150 DEG C. Solvents such as chlorinated hydrocarbons or benzene may be used if desired. It is preferred to discontinue reaction at 50% to 70% conversion to avoid polymerization. The products may be purified by distillation under reduced pressure and stabilized with phenothiazine or hydroquinone.

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