METHOD FOR PRODUCING 1,6-HEXANEDIOL AND 6-HYDROXYCAPROIC ACID OR THEIR ESTERS

    公开(公告)号:CA2297724A1

    公开(公告)日:1999-05-27

    申请号:CA2297724

    申请日:1998-10-16

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing 1,6-hexanediol and 6hydroxycaproic acid or their esters by the catalytic hydrogenation of adipic acid, adipic acid monoesters or adipic acid diesters or educt flows containing adipic acid or its esters as essential constituents. The bottom product obtained when the hydrogenation discharge is distilled after the hexanediol and the hydroxycaproic acid or its esters have been separated off is reintroduced into the hydrogenation process, said bottom product essentially containing oligomeric esters of the 6-hydroxycaproic acid. The resulting mixture of the educt and the return flow is reacted at temperatures of 100 to 300 ~C and at pressures of 10 to 300 bar in the liquid phase and with a molar ratio of carboxyl groups to be hydrogenated to hydrogen in the reactor of 1:5 to 1:100, on hydrogenating catalysts.

    203.
    发明专利
    未知

    公开(公告)号:DE59407851D1

    公开(公告)日:1999-04-01

    申请号:DE59407851

    申请日:1994-11-09

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP94/03683 Sec. 371 Date May 16, 1996 Sec. 102(e) Date May 16, 1996 PCT Filed Nov. 9, 1994 PCT Pub. No. WO95/14010 PCT Pub. Date May 26, 1995A process for the preparation of gamma -butyrolactone, in which 2,5-dihydrofuran or 2,3-dihydrofuran or a mixture of these two dihydrofurans is caused to react in the gas phase in the presence of water and in the presence or absence of additional hydrogen at elevated temperature over a hydrogenating catalyst.

    204.
    发明专利
    未知

    公开(公告)号:BR9612108A

    公开(公告)日:1999-02-23

    申请号:BR9612108

    申请日:1996-11-18

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP96/05071 Sec. 371 Date May 22, 1998 Sec. 102(e) Date May 22, 1998 PCT Filed Nov. 18, 1996 PCT Pub. No. WO97/19939 PCT Pub. Date Jun. 5, 1997In a process for the catalytic hydrogenation of 2,5- and 2,3-dihydrofuran with hydrogen to give tetrahydrofuran, use is made of a catalyst in which a metal or a plurality of metals have been deposited by vapor deposition or sputtering on a metal wire mesh or a metal foil as support.

    205.
    发明专利
    未知

    公开(公告)号:ES2122538T3

    公开(公告)日:1998-12-16

    申请号:ES95906933

    申请日:1995-01-12

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP94/00114 Sec. 371 Date Jul. 12, 1996 Sec. 102(e) Date Jul. 12, 1996 PCT Filed Jan. 12, 1995 PCT Pub. No. WO95/19334 PCT Pub. Date Jul. 20, 1995A process for the preparation of n-butyraldehyde and/or n-butanol, wherein a) 1,3-butadiene is caused to react with an alcohol of the formula IROHI, to form a mixture of adducts of the formulas II II and III III b) the adduct III is isomerized to the adduct II, c) the adduct II is isomerized in the presence of a homogeneous or heterogeneous transition metal element catalyst to form the enol ether of the formula IV IV and d) n-butyraldehyde and/or n-butanol is/are produced from this ether IV by the reaction thereof with hydrogen and water or water only in the presence of a homogeneous or heterogeneous catalyst.

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