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    PROCESS FOR PREPARING ALKYL ESTERS OF (METH)ACRYLIC ACID
    22.
    发明专利
    PROCESS FOR PREPARING ALKYL ESTERS OF (METH)ACRYLIC ACID 未知

    公开(公告)号：CZ273496A3

    公开(公告)日：1998-05-13

    申请号：CZ273496

    申请日：1996-09-18

    Applicant: BASF AG

    Inventor： BAUR KARL GERHARD DR ,  ANNEN ULRICH DR ,  EXNER HERBERT DR ,  FRIED MICHAEL DR ,  RAUH ULRICH

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

    Abstract: A process for the prodn. of (1-4C alkyl) (meth)acrylate esters (AM/AE) from esters of formula (I) and opt. esters of formula (II), in which R = H or Me; R , R = 1-4C alkyl; n = 0 or more. The process comprises reaction in the liq. phase under reduced pressure in presence of acid, with continuous removal of cleavage prods. Also claimed is a process for the prodn. of (AM/AE) by the acid-catalysed esterification of 1-4C alkanols with (meth)acrylic acid, in which by-prods. (I) and (II) are sepd. from the prod. mixt. and subjected to the above cleavage process, and the cleavage prods. are continuously removed and returned to the esterification process.

    Preparing alkyl ester of (meth)acrylic acid comprises supplying (meth)acrylic acid, alkanol and catalyst to reaction zone, adding discharged mixture to rectification unit, supplying a partial flow of sump stream and isolating streams
    25.
    发明专利
    Preparing alkyl ester of (meth)acrylic acid comprises supplying (meth)acrylic acid, alkanol and catalyst to reaction zone, adding discharged mixture to rectification unit, supplying a partial flow of sump stream and isolating streams 未知

    公开(公告)号：DE102005010587A1

    公开(公告)日：2006-06-08

    申请号：DE102005010587

    申请日：2005-03-08

    Applicant: BASF AG

    Inventor： HABECK THORSTEN ,  RAUH ULRICH ,  FRIESE THORSTEN ,  MARTAN HANS

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

    Abstract: Continuous preparation of alkyl ester of (meth)acrylic acid (A) comprises supplying (meth)acrylic acid, 1-5C alkanol and acid esterifying catalyst (a) to a reaction zone (5,6); adding the discharged reaction mixture to a rectification unit (I); isolating the alkyl ester of (meth)acrylic acid containing in main stream (23) and a sump stream (22); supplying a partial flow of the sump stream; and isolating the separated sump stream (40). Continuous preparation of alkyl ester of (meth)acrylic acid (A) comprises reacting (meth)acrylic acid and 1-5C alkanol in homogeneous, liquid, solvent-free phase with increased temperature and in presence of a acid esterifying catalyst, where (meth)acrylic acid, alkanol and acid esterified catalyst are supplied to a reaction zone (5,6) (that water formed during a retention time are separated rectificative as a component of a alkanol comprising mixture in one of the reaction zone mounted rectification unit (III), in which obtained distillate is isolated in a alkanol containing organic and a water containing aqueous phase, the organic phase is led back into (III) and the aqueous phase is removed, and a reaction mixture (21) is discharged from the reaction zone); initiating the mixture into a rectification unit (I) and the alkyl ester of (meth)acrylic acid containing in main stream (23) and a sump stream (22) are isolated under addition of water; supplying a partial flow of the sump stream (22) from (I) of a residue column unit (IV) comprising a column boiler (61) and recycling into a main stream (29) in (I) and isolating the separated sump stream (40); where (IV) comprises a rectification column (62) in addition to the column boiler, and the ascending vapors from the column boiler are initiated into the rectification column, and resulting liquid at the lowest stage of the rectifying column is led into the column boiler, where the rectification column is operated in a manner, such that the water content of the resulting liquid at the lowest stage is smaller than 0.1 wt.%.

    28.
    发明专利
    未知

    公开(公告)号：ES2179397T3

    公开(公告)日：2003-01-16

    申请号：ES98107290

    申请日：1998-04-22

    Applicant: BASF AG

    Inventor： SCHLIEPHAKE VOLKER DR ,  HAMMON ULRICH DR ,  RAUH ULRICH ,  SCHRAUT ARMIN DR

    IPC: B01J8/06 ,  B01J19/00

    Abstract: Reactor arrangement comprises at least two tubular reactors filled with solid particles, at least one reactor containing a temperature measuring device. The novelty is that the tubular reactors are arranged so that the ratio of the composition of the solid particles to the free cross-sectional surfaces of each reactor as well as the pressure loss, measured by passing an inert gas proportionally transversal to the free cross-sectional, are equal over each tubular reactor. Also claimed is a process for treating fluid compositions with the production and consumption of thermal energy using the above reactor arrangement.

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