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    • 4. 发明专利
      CA2196915A1 CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID 未知
    • CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID
    • CA2196915A1
    • 1997-08-07
    • CA2196915
    • 1997-02-05
    • DAMS ALBRECHT , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , IFFLAND GABRIELE , WECK ALEXANDER
    • DAMS ALBRECHT , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , IFFLAND GABRIELE , WECK ALEXANDER
    • B01J27/02 , B01J31/02 , C07B41/12 , C07B61/00 , C07C67/08 , C07C67/54 , C07C69/54
    • In a process and an apparatus for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid with alkanols having from 1 to 5 carbon atoms in a homogeneous, liquid, solvent-free phase at elevated temperature and in the presence of an acid esterification catalyst, in which the (meth)acrylic acid, the alkanol and the catalyst are fed to a reaction zone, the water formed is removed by rectification during a residence time as constituent of a mixture comprising alkanol in a rectification unit superposed on the reaction zone, the distillate thus obtained is separated into an organic phase comprising alkanol and an aqueous phase comprising water, the organic phase is returned to the rectification unit, the reaction mixture is discharged from the reaction zone and conveyed into a distillative separation zone comprising further rectification units and in the latter the alkyl (meth)acrylate formed is separated off. Therein, a) (meth)acrylic acid and an alkanol are reacted in a molar ratio of from 1:0.75 to 1:2, b) the organic phase formed in the rectification unit (III) is essentially completely returned to the rectificationunit III, c) the total amount of the aqueous phase formed in the rectification unit III is essentially removed from the system, d) the reaction mixture discharged from the reaction zone is, with addition of water, fed to a further rectification unit (I) and in this is separated into a product (II) comprising the catalyst and the remaining (meth)acrylic acid and a product (I), comprising the alkyl ester of (meth)acrylic acid, remaining alkanol and water, e) the product (II) formed in the 2. rectification unit (I) is essentially completely returned to the reaction zone, f) the product (I) from the rectification unit (I) is separated into an organic phase comprising the alkyl ester of (meth)acrylic acid and an aqueous phase and g) the organic phase formed in the rectification unit (I) is fed to a further rectification unit (II) and in this the alkyl ester of (meth)acrylic acid is separated from the remaining alkanol and the remaining alkanol is returned to the reaction zone.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 7. 发明申请
      WO0210110A3 METHOD FOR PRODUCING TERTIARY C>4<-C>8<-ALKYL ESTERS OF (METH)ACRYL ACID AND A FALLING FILM EVAPORATOR INVOLVED THEREIN 审中-公开
    • METHOD FOR PRODUCING TERTIARY C>4<-C>8<-ALKYL ESTERS OF (METH)ACRYL ACID AND A FALLING FILM EVAPORATOR INVOLVED THEREIN
    • 用于生产（甲基）丙烯酸及其相关CASE膜蒸发器TERT C4-C8烷基酯
    • WO0210110A3
    • 2002-09-19
    • PCT/EP0108713
    • 2001-07-27
    • BASF AG , KROKER RUPRECHT , NESTLER GERHARD , SCHMITT WERNER , SCHUMM WINFRIED
    • KROKER RUPRECHT , NESTLER GERHARD , SCHMITT WERNER , SCHUMM WINFRIED
    • B01D3/14 , B01D1/06 , B01D5/00 , C07B61/00 , C07C67/04 , C07C67/54 , C07C69/54 , B01D1/22
    • C07C67/04 , B01D1/065 , C07C67/54 , Y10S203/09 , C07C69/54
    • The invention relates to a method for producing a tertiary C>4 8 and R , which can be identical or different, represent methyl or ethyl and R represents H, methyl or ethyl, in a homogeneous phase in the presence of an acidic catalyst and extracting the tertiary C4-C8 alkyl(meth)acrylate from the reaction mixture. According to the invention, the catalyst is separated as a residue in a two-stage distillation of the reaction mixture and the tertiary C4-C8 alkyl(meth)acrylate is extracted from the distillation. The inventive method permits the use of (meth)acryl acid that contains acetic acid. The risk of a breakdown of the ester and the polymerization of the (meth)acryl compounds is reduced. The invention also relates to a falling film evaporator comprising a cylindrical casing (2), a plurality of evaporation tubes (3) located in said casing (2), means (4) for supplying the liquid to be evaporated and means (5) for heating the evaporation tubes (3). Said evaporator is characterised in that at least one evaporation tube (3) has a closed head region (6), into which a supply line (7) for the liquid to be evaporated opens, said supply line (7) communicating with the means (4) for supplying the liquid to be evaporated.
    • 本发明涉及一种通过（甲基）丙烯酸与式（I）的烯烃反应来制备叔C4-C8烷基（甲基）丙烯酸酯，其中R <1>和R <2>，其等于 可以是或不同，代表甲基或乙基，R <3>为H，甲基或乙基，在叔C4-C8烷基（甲基）从反应混合物中丙烯酸酯的酸催化剂和回收的存在下均相， 通过由反应混合物作为残余物，并从馏出物胜叔C4-C8烷基（甲基）丙烯酸的两阶段蒸馏分离催化剂。 本发明的方法允许，可以使用含乙酸（甲基）丙烯酸。 酯和（甲基）丙烯酸系化合物的聚合的裂解的风险被降低。 此外，在罩（2）包括圆柱形外套（2），各种的降膜蒸发器布置蒸发管（3）的装置（4），用于将液体供给至被汽化，以及装置（5），用于加热所述蒸发管（3），其特征在于 ，（6），至少一个蒸发管（3）具有一个封闭的头部具有在（7）的液体打开一个进料管线将被蒸发，所述供给管线（7）的装置（4）中的液体的供给连通而蒸发。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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