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    Zpusob výroby kyseliny akrylové a kyseliny metakrylové
    2.
    发明专利
    Zpusob výroby kyseliny akrylové a kyseliny metakrylové 未知

    公开(公告)号：CZ298792B6

    公开(公告)日：2008-01-30

    申请号：CZ2000885

    申请日：1998-09-09

    Applicant: BASF AG

    Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROELLOS KLAUS

    IPC: C07C51/43 ,  C07C51/44 ,  C07C57/07

    Abstract: Zpusob výroby kyseliny akrylové nebo metakrylové výrobou plynné smesi produktu, která má v podstatesložení reakcní smesi z katalytické oxidace v plynné fázi alkanu, alkenu, alkanolu a/nebo alkanalu se 3 nebo 4 uhlíkovými atomy a/nebo jejich predstupnu na kyselinu akrylovou, prípadne kyselinu metakrylovou. Oddelení kyseliny akrylové nebo metakrylové z plynné smesi produktu se pritom provádí zpusobem, který obsahuje následující kroky: a) kondenzace plynné smesi produktu, b) krystalizace kyseliny akrylové nebo kyseliny metakrylové z roztoku získaného ve stupni a), c) oddelení získaných krystalu z matecného louhu stupne b) a d) zpetné uvedení nejméne cásti matecného louhu ze stupne c) do stupne a).

    4.
    发明专利
    未知

    公开(公告)号：DE59808713D1

    公开(公告)日：2003-07-17

    申请号：DE59808713

    申请日：1998-09-10

    Applicant: BASF AG

    Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROELLOS KLAUS

    IPC: B01D5/00 ,  C07C51/44 ,  C07C57/07

    Abstract: A process for the fractional condensation of a gas mixture which, in addition to acrylic acid or methacrylic acid, also contains at least one further condensable component and additionally a high proportion of one or more noncondensable components, wherein the gas mixture is passed through a column having separatory internals and the condensable components are condensed by cooling.

    ISOLATION OF A CONJUGATED DIOLEFIN FROM A C.SUB.4- OR C.SUB.5- HYDROCARBON MIXTURE
    6.
    发明专利
    ISOLATION OF A CONJUGATED DIOLEFIN FROM A C.SUB.4- OR C.SUB.5- HYDROCARBON MIXTURE 未知

    公开(公告)号：CA1145289A

    公开(公告)日：1983-04-26

    申请号：CA347097

    申请日：1980-03-06

    Applicant: BASF AG

    Inventor： VOLKAMER KLAUS ,  BROELLOS KLAUS ,  LINDNER ALFRED ,  WAGNER ULRICH ,  WEITZ HANS-MARTIN ,  SCHNEIDER KLAUS-JUERGEN

    IPC: C07C1/00 ,  C07C7/08 ,  C07C11/12 ,  C07C67/00

    Abstract: of the disclosure: A process for isolating a conjugated diolefin from a C4- or C5-hydrocarbon mixture containing the diolefin, by single-stage or multi-stage extractive distillation using a selective solvent, wherein the selective solvent is a solvent mixture which comprises (a) from 50 to 98 percent by weight of an N-alkyl-substituted lower aliphatic acid amide or of an N-alkyl-substituted alicyclic acid amide having 5 ring members and (b) from 2 to 50 percent by weight of an aliphatic ether boiling at from 30.degree.C to 200.degree. of the general formula R-O-R', where the aliphatic radical R is a hydrocarbon radical of 1 to 6 carbon atoms and the aliphatic radical R' is a hydrocarbon radical of 2 to 6 carbon atoms, or a dialkyl ether of a dihydric alcohol boiling at from 30.degree.C to 200.degree.C, of the general formula R1-¢OCH2-CHR-!nOR2, where R is hydrogen or CH3, R1 and R2 are each a hydrocarbon radical of 1 to 5 carbon atoms, and n is an integer from 1 to 3, or an alicyclic ether boiling at from 50.degree.C to 125.degree.C.

    7.
    发明专利
    未知

    公开(公告)号：DE59803651D1

    公开(公告)日：2002-05-08

    申请号：DE59803651

    申请日：1998-09-09

    Applicant: BASF AG

    Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROELLOS KLAUS

    IPC: C07C51/43 ,  C07C51/44 ,  C07C57/07

    Abstract: A process for preparing acrylic acid or methacrylic acid comprises preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4-alkanes, -alkenes, -alkanols and/or -alkanals and/or precursors thereof to form acrylic acid or methacrylic acid. The product is removed from the gaseous product mixture by a process comprising the following steps:(a) condensing said gaseous product mixture,(b) crystallizing acrylic acid or methacrylic acid from the solution obtained in step (a),(c) removing the resulting crystals from the mother liquor, and(d) recycling at least a portion of said mother liquor from step (c) into step (a).

    10.
    发明专利
    未知

    公开(公告)号：BR9912344A

    公开(公告)日：2001-04-17

    申请号：BR9912344

    申请日：1999-07-21

    Applicant: BASF AG

    Inventor： ECK BERND ,  HEILEK JOERG ,  SCHLIEPHAKE VOLKER ,  PROLL THEO ,  BROELLOS KLAUS ,  MACHHAMMER OTTO ,  THIEL JOACHIM

    IPC: C07C51/225 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

    Abstract: A process for the preparation of acrylic acid by:(a) preparation of a gaseous product mixture which essentially has the composition of a reaction mixture of catalytic gas-phase oxidation of C3-alkanes, C3-alkenes, C3-alkanols and/or C3-alkanals and/or intermediates thereof to acrylic acid, which comprises(b) condensation of the gaseous product mixture,(c) crystallization of the acrylic acid from the solution obtained in stage (b), with partial evaporation of the solution under reduced pressure,(d) isolation of the resulting crystals from the mother liquor,(e) recycling of at least a part of the mother liquor from stage (d) to stage (b) and(f) recycling of at least a part of the evaporated solution from stage (c) to stage (b).

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