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    121.
    发明专利
    未知

    公开(公告)号：DE3829142A1

    公开(公告)日：1990-03-01

    申请号：DE3829142

    申请日：1988-08-27

    Applicant: BASF AG

    Inventor： GOSCH HANS-JUERGEN DR ,  FISCHER ROLF DR

    IPC: C07C29/04 ,  C07C27/00 ,  C07C29/86 ,  C07C35/08 ,  C07C67/00

    Abstract: Process for the separation of cyclohexanol by extraction from aqueous solutions containing this and aromatic sulphonic acids, characterised in that mixtures of a) at least one liquid aliphatic, cycloaliphatic or aromatic hydrocarbon, halchlorohydrocarbon or ether, which is inert under the extraction conditions and b) at least one phenol are used as extracting agents.

    124.
    发明专利
    未知

    公开(公告)号：DE3719933A1

    公开(公告)日：1988-12-29

    申请号：DE3719933

    申请日：1987-06-15

    Applicant: BASF AG

    Inventor： BERTLEFF WERNER DR ,  FISCHER ROLF DR ,  KUMMER RUDOLF DR ,  MERGER FRANZ DR ,  SCHNEIDER HEINZ-WALTER DR

    IPC: C07B61/00 ,  C07C67/313 ,  C07C67/333 ,  C07C67/38 ,  C07C69/533 ,  C07C69/66 ,  C07C69/67 ,  C07C69/716

    Abstract: The preparation of 5-formylvaleric esters comprises the following steps… a) hydroformylation of pentenoic esters by reaction with carbon monoxide and hydrogen at elevated temperature and pressure in the presence of carbonyl complexes of metals from Group VIII of the Periodic Table with the formation of a mixture of 5-, 4- and 3-formylvaleric esters… b) separation of 5-formylvaleric esters from the mixture thus obtained of 5-, 4- and 3-formylvaleric esters, leaving a mixture substantially comprising 4- and 3-formylvaleric esters behind… c) cleavage of the mixture substantially comprising 4- and 3-formylvaleric esters to give pentenoic esters at a temperature of 50 to 400 DEG C in the presence of catalysts and… d) recycling of the pentenoic esters into step a.

    125.
    发明专利
    未知

    公开(公告)号：DE3710805A1

    公开(公告)日：1988-10-20

    申请号：DE3710805

    申请日：1987-03-31

    Applicant: BASF AG

    Inventor： BECKER RAINER DR ,  ECKHARDT HEINZ DR ,  FISCHER ROLF DR ,  SPIEGLER WOLFGANG DR ,  VAGT UWE DR

    IPC: C07D309/08

    Abstract: A process for the preparation of esters of tetrahydropyran-4-carboxylic acid of the general formula I, where R1 is an alkyl, cycloalkyl, or aryl group, by treating butyrolactones of the general formula II, where R2 is a hydrogen atom, an alkyl group, or an acyl group -CO-R3, R3 being a hydrogen atom or an alkyl group with from 1 to 6 carbon atoms, with alcohols of the general formula III at temperatures of from 150 DEG C. to 400 DEG C. in the presence of acid catalysts.

    126.
    发明专利
    未知

    公开(公告)号：DE3643011A1

    公开(公告)日：1988-06-30

    申请号：DE3643011

    申请日：1986-12-17

    Applicant: BASF AG

    Inventor： DOCKNER TONI DR ,  SAUERWALD MANFRED DR ,  FISCHER ROLF DR ,  HUTMACHER HANS-MARTIN DR ,  PRIESTER CLAUS-ULRICH DR ,  VAGT UWE DR

    IPC: C07D201/08 ,  C07D201/16 ,  C07D213/10

    Abstract: In an improved process for preparing caprolactam by heating 6-aminocaproic acid, an ester or amide or mixture thereof in the presence of an inert reaction medium which is liquid under the reaction conditions and has a boiling point above that of caprolactam, the improvement comprises using as the reaction medium a hydrocarbon, maintaining a temperature of from 150 DEG to 350 DEG C., charging the 6-aminocaproic acid, ester, amide or mixture thereof at a rate commensurate with their rate of conversion, and separating caprolactam from the reaction mixture at a rate commensurate with its rate of formation.

    127.
    发明专利
    未知

    公开(公告)号：DE3628576A1

    公开(公告)日：1988-03-03

    申请号：DE3628576

    申请日：1986-08-22

    Applicant: BASF AG

    Inventor： SPIEGLER WOLFGANG DR ,  GOETZ NORBERT DR ,  SAUERWALD MANFRED DR ,  DOCKNER TONI DR ,  FISCHER ROLF DR

    IPC: C07D309/22 ,  C07D309/28 ,  C07D309/32

    Abstract: 3,4-dihydro-2H-pyrans I I where R1, R2, R3 and R4 are each H or C1-C6-alkyl and R3 is not C2-C4-alkyl when A is COOR5+L, and A is COOR5, =CHOR5, in which R5 is C1-C4-alkyl, or CH2OR6, in which R6 is C1-C4-alkyl or is benzyl which is unsubstituted or substituted by C1-C4-alkyl, alkoxy or halogen, or is formyl, C2-C4-alkylcarbonyl or benzoyl which is unsubstituted or substituted by C1-C4-alkyl, alkoxy or halogen, are prepared by eliminating an alcohol from a 2-alkoxytetrahydropyran II II where R7 is C1-C18-alkyl and A' is COOR5, CH(OR5)2 or CH2OR6, in which R5 and R6 have the meanings stated for I, the elimination being carried out by passing II, in the liquid or gaseous state, into a high boiling mineral oil at above the boiling point of the resulting dihydropyran I, removing I in gaseous form, replenishisng the high boiling mineral oil when it becomes enriched with byproducts, and removing the said mineral oil enriched with byproducts.

    128.
    发明专利
    未知

    公开(公告)号：DE3609139A1

    公开(公告)日：1987-09-24

    申请号：DE3609139

    申请日：1986-03-19

    Applicant: BASF AG

    Inventor： FISCHER ROLF DR ,  VAGT UWE DR

    IPC: C07C69/533 ,  C07C67/00 ,  C07C67/475 ,  C07C69/52 ,  C07C67/03

    Abstract: 4-Pentenoates of the formula I where R is alkyl of from 1 to 6 carbon atoms, are prepared by a process in which 5-methylbutyrolactone of the formula I is reacted with an alcohol of the formula R-O-H III, where R has the above meaning, at from 150 DEG to 400 DEG C. in the presence of an acidic catalyst.

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