中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

15 records (took 0.023 seconds)

    Method for purifying mixture obtained through catalytic vapor-phase oxidation of propene and/or acrolein, by separation treatment inducing phase formation
    1.
    发明专利
    Method for purifying mixture obtained through catalytic vapor-phase oxidation of propene and/or acrolein, by separation treatment inducing phase formation 审中-公开
    通过分离处理诱导相形成来净化丙烯和/或丙烯酸的催化蒸气相氧化获得的混合物的方法

    公开(公告)号：JP2007091759A

    公开(公告)日：2007-04-12

    申请号：JP2007003878

    申请日：2007-01-11

    Applicant: Basf Ag ,  ビーエーエスエフ アクチェンゲゼルシャフトBASF Aktiengesellschaft

    Inventor： MACHHAMMER OTTO ,  DAMS ALBRECHT DR ,  ECK BERND ,  PROLL THEO

    IPC: C07C51/43 ,  C07C57/04 ,  C07C51/235 ,  C07C51/25 ,  C07C51/44 ,  C07C57/05 ,  C07C57/07

    CPC classification number: C07C51/43 ,  C07C57/04

    Abstract: PROBLEM TO BE SOLVED: To provide a method for purifying acrylic acid or methacrylic acid, whereby high purity and a high yield of the acid are achieved.
    SOLUTION: (a) A mixture comprising the acrylic acid or methacrylic acid is subjected to a stringently defined separation treatment essentially in the absence of an organic solvent, this phase is then taken off, (b) at least a part of a residual phase from step (a) is subjected to a less stringently defined separation treatment, and (c) one of phases formed in step (b) is fed to the stringently defined separation treatment in step (a). This method offers a possibility that the overall economical efficiency of the treatment is increased through circulation and that the economical efficiency is improved even when static crystallization is omitted.
    COPYRIGHT: (C)2007,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种纯化丙烯酸或甲基丙烯酸的方法，从而实现了高纯度和高收率的酸。 解决方案：（a）包含丙烯酸或甲基丙烯酸的混合物基本上在不存在有机溶剂的情况下进行严格限定的分离处理，然后将该相脱除，（b）至少部分 对步骤（a）的残留相进行较不严格的分离处理，和（c）步骤（b）中形成的一相中的步骤（a）中被严格限定的分离处理。 该方法提供了通过循环增加处理的整体经济效率的可能性，并且即使省略静态结晶也提高了经济效率。 版权所有（C）2007，JPO＆INPIT

    RECTIFICATIVE SEPARATION OF FLUIDS COMPRISING (METH) ACRYLIC MONOMERS
    4.
    发明专利
    RECTIFICATIVE SEPARATION OF FLUIDS COMPRISING (METH) ACRYLIC MONOMERS 未知

    公开(公告)号：MY139338A

    公开(公告)日：2009-09-30

    申请号：MYPI20034795

    申请日：2003-12-15

    Applicant: BASF AG

    Inventor： THIEL JOACHIM DR ,  DAMS ALBRECHT DR ,  SCHRODER JURGEN DR

    IPC: C07C51/44 ,  B01D3/14 ,  B01D5/00 ,  C07C45/81 ,  C07C45/82 ,  C07C51/43 ,  C07C67/54

    Abstract: A PROCESS FOR RECTIFICATIVELY SEPARATING FLUIDS COMPRISING (METH)ACRYLIC MONOMERS IN A RECTIFICATION COLUMN BY DIRECTLY COOLING THE VAPOR COMPRISING (METH)ACRYLIC MONOMERS RISING TO THE TOP OF THE RECTIFICATION COLUMN TO FORM TOP CONDENSATE COMPRISING (METH)ACRYLIC MONOMERS, THE CONDENSATION SPACE AT THE TOP OF THE COLUMN BEING SEPARATED FROM THE REGION OF THE RECTIFICATION COLUMN CONTAINING THE SEPARATING INTERNALS ONLY BY AT LEAST ONE CHIMNEY TRAY FROM WHICH THE TOP CONDENSATE FORMED IS REMOVED FROM THE RECTIFICATION COLUMN, WHICH COMPRISES EFFECTING THE DIRECT COOLING OF THE VAPOR IN THE CONDENSATION SPACE IN AT LEAST TWO SPRAY ZONES WHICH ARE SPATIALLY SUCCESSIVE AND ARE FLOWED THROUGH BY VAPOR BY SPRAYING SUPERCOOLED TOP CONDENSATE COMPRISING ADDED POLYMERIZATION INHIBITOR, AND THE TEMPERATURE OF THE SPRAYED SUPERCOOLED TOP CONDENSATE BECOMING LOWER FROM SPRAY ZONE TO SPRAY ZONE IN THE FLOW DIRECTION OF THE VAPOR.

    PROCESS OF CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID AND APPARATUS FOR MAKING THE SAME
    6.
    发明专利
    PROCESS OF CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID AND APPARATUS FOR MAKING THE SAME 未知

    公开(公告)号：CZ273696A3

    公开(公告)日：1998-05-13

    申请号：CZ273696

    申请日：1996-09-18

    Applicant: BASF AG

    Inventor： EXNER HERBERT DR ,  BAUR KARL DR ,  DOCKNER TONI DR ,  POTTHOFF CHRISTINE ,  DAMS ALBRECHT DR

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

    Abstract: The continuous prodn. of alkyl(meth)acrylates (I) by the reaction of (meth)acrylic acid (II) and 1-8C monohydric alcohols (III) in homogeneous liq. phase at elevated temp. in the absence of solvent and in presence of an acid esterification catalyst (IV). The process comprises (a) feeding (II), (III) and (IV) continuously into a reaction zone (RZ), (b) removing (I) after a residence time in the form of an azeotrope contg. water or water and (III) in addn. to (I) at the top of a rectifier column (RC) mounted over the RZ, (c) separating the distillate into an organic phase contg. (I) and aq. phase(s) contg. water, (d) recycling part of the organic phase via the top of the column and opt. returning water to the RZ, (e) separating (I) from the rest of the organic phase and removing part of the reaction mixt. continuously from the RZ. The RZ consists of a cascade of at least two reactors in series, and the outflow from one reactor provides the input flow for the next reactor. Also claimed is an appts. for this process.

    9.
    发明专利
    未知

    公开(公告)号：DE19631645A1

    公开(公告)日：1998-02-12

    申请号：DE19631645

    申请日：1996-08-05

    Applicant: BASF AG

    Inventor： HEIDA BERND ,  THIESSEN FRITZ DR ,  HAMMON ULRICH DR ,  DAMS ALBRECHT DR

    IPC: C07C51/25 ,  C07C51/48 ,  C07C57/04 ,  C07C57/05 ,  C07C57/07

    Abstract: In the production process for acrylic acid through catalytic vapour-phase oxidation of propene, acrylic acid is separated from the vapour-phase oxidation reaction mixture by means of an absorbing agent containing diphenyl, diphenyl ether or dimethyl phthalate and is also extracted from the vapour-phase oxidation acidic water by means of a solvent containing diphenyl, diphenyl ether or dimethyl phthalate.

    10.
    发明专利
    未知

    公开(公告)号：DE19606877A1

    公开(公告)日：1997-08-28

    申请号：DE19606877

    申请日：1996-02-23

    Applicant: BASF AG

    Inventor： MACHHAMMER OTTO DR ,  DAMS ALBRECHT DR ,  ECK BERND ,  PROLL THEO DR

    IPC: C07C57/04 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

    Abstract: A process for purifying (meth)acrylic acid by phase separation techniques comprises the following steps: (a) a mixture containing (meth)acrylic acid is separated into distinct phases in the presence of an organic solvent, with the composition of the (meth)acrylic acid-rich phase remaining essentially unchanged, and this acid-rich phase is separated; (b) the remaining phase from step (a) is separated into indistinct phases; and (c) one of the phases from step (b) is returned to step (a). Also claimed is preparation of (meth)acrylic acid. Preferably in step (c) the acid-rich phase is returned to step (a). 1-100 (100) wt.% of the phase remaining from step (a) is used in step (b). Pure end product is added to steps (a) and (b). Step (a) involves crystallisation, freezing or sublimation, preferably static and/or dynamic crystallisation, and most preferably a combined static and dynamic crystallisation in which the residue from the dynamic crystallisation is added to the static crystallisation step and the crystallised product from the static crystallisation is returned to the dynamic crystallisation.

Patent Agency Ranking