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    CONTINUOUS PRODUCTION OF ALKYL ESTER OF (METH)ACRYLIC ACID AND APPARATUS THEREFOR
    3.
    发明专利
    CONTINUOUS PRODUCTION OF ALKYL ESTER OF (METH)ACRYLIC ACID AND APPARATUS THEREFOR 失效

    公开(公告)号：JPH101455A

    公开(公告)日：1998-01-06

    申请号：JP2299497

    申请日：1997-02-05

    Applicant: BASF AG

    Inventor： DAMS ALBRECHT ,  AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  EXNER HERBERT ,  IFFLAND GABRIELE ,  WECK ALEXANDER

    IPC: B01J27/02 ,  B01J31/02 ,  C07B41/12 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

    Abstract: PROBLEM TO BE SOLVED: To provide a method for continuously producing a (meth)acrylic acid alkyl ester, slightly causing ether of a by-product and high boiling point material in high space time yield and provide an apparatus therefor. SOLUTION: (Meth)acrylic acid is reacted with a 1-5C alkanol in (1:0.75) to (1:2) molar ratio and an organic phase from a rectifier III above a reaction zone is returned to the rectifier and water phase is removed from the system and water is added to a reaction mixture discharged from the reaction zone and the reaction mixture is fed to the rectifier I and separated into a product II containing residual (meth)acrylic acid and a product I containing residual alkanol and water in the rectifier I and the product 11 is returned to the reaction zone and the product from the rectifier I is separated into a (meth)acrylic acid alkyl ester-containing organic phase and water phase and the organic phase is fed to the rectifier II and the residual alkanol is separated from the (meth)acrylic acid alkyl ester and returned to the reaction zone.

    8.
    发明专利
    未知

    公开(公告)号：BR9915230A

    公开(公告)日：2001-07-31

    申请号：BR9915230

    申请日：1999-11-05

    Applicant: BASF AG

    Inventor： AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHAR ,  SCHROEDER JUERGEN ,  BECKMANN STEFAN

    IPC: C07C67/08 ,  C07C67/327 ,  C07C67/60 ,  C07C69/54

    Abstract: In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and (meth)acrylic ester to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is first separated off and then the oxyesters contained in it are cleaved in the presence of a relatively long-chain alkylbenzenesulfonic acid at elevated temperatures.

    Gas admixed to rotating liquid in a tank with sidewall projections located between fluid crest and whirlpool base and skimming fluid onto incoming gas
    9.
    发明专利
    Gas admixed to rotating liquid in a tank with sidewall projections located between fluid crest and whirlpool base and skimming fluid onto incoming gas 未知

    公开(公告)号：DE19957816A1

    公开(公告)日：2001-06-07

    申请号：DE19957816

    申请日：1999-12-01

    Applicant: BASF AG

    Inventor： HERBST HOLGER

    IPC: B01F3/04 ,  B01F7/16

    Abstract: An assembly releases and dissolves gas into a charge of liquid rotated by a mixer arm within an upright circular tank. Centrifugal forces create a whirlpool with liquid rising up the tank wall. The wall has projections and gas inlets positioned between the fluid surface at rest and the crest. The projections skim fluid from the crest surface which falls over and through the incoming gas. An assembly releases and dissolves gas into a charge of liquid rotated by a mixer arm within an upright circular tank. Centrifugal forces create a whirlpool with liquid rising up the tank wall. The wall has a number of projections and gas inlets positioned between the fluid surface at rest and the crest. The projections skim fluid from the crest surface which falls over and through the incoming gas. The gas inlets extend up to two-thirds of the tank radius. Gas is released into the tank throughout the full depth, but especially in the zone between the whirlpool and skimmed liquid. The gas inlet is an array of straight pipes parallel to the axis of rotation. The pipes are of streamlined circular cross section. The ratio of pipe diameter to mixer tank is in the range 0.005 to 0.1. The gas outlet holes are 1 to several centimeters, or the pipes are of gas-porous material. Alternatively, the tank has a secondary gas-permeable inner wall which is a micro-porous membrane.

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