PROCESS FOR PREPARING 1, 6 HEXANE DIOL WITH A LEVEL OF PURITY OVER 99%

    公开(公告)号:MY117553A

    公开(公告)日:2004-07-31

    申请号:MYPI9700831

    申请日:1997-03-01

    Applicant: BASF AG

    Abstract: 1,6-HEXANEDIOL IS PREPARED FROM A CARBOXYLIC ACID MIXTURE COMPRISING ADIPIC ACID, 6-HYDROXYCAPROIC ACID AND SMALL AMOUNTS OF 1,4- CYCLOHEXANEDIOLS WHICH IS OBTAINED AS A BY-PRODUCT IN THE OXIDATION OF CYCLOHEXANE TO CYCLOHEXANONE/CYCLOHEXANOL BY WATER EXTRACTION OF THE REACTION MIXTURE, BY ESTERIFICATION OF THE ACIDS AND HYDROGENATION WHEREIN A) THE MONOCARBOXYLIC AND DICARBOXYLIC ACIDS PRESENT IN THE AQUEOUS DICARBOXYLIC ACID MIXTURE ARE REACTED WITH A LOW MOLECULAR WEIGHT ALCOHOL TO GIVE THE CORRESPONDING CARBOXYLIC ESTERS, B) THE RESULTING ESTERIFICATION MIXTURE IS FREED OF EXCESS ALCOHOL AND LOW BOILERS IN A FIRST DISTILLATION STAGE, C) THE BOTTOMS ARE FRACTIONATED IN A SECOND DISTILLATION STAGE TO GIVE AN ESTER FRACTION ESSENTIALLY FREE OF 1,4-CYCLOHEXANEDIOSL AND A FRACTION COMPRISING AT LEAST THE MAJOR PART OF THE 1,4-CYCLOHEXANEDIOLS, D) THE ESTER FRACTION ESSENTIALLY FREE OF 1,4-CYCLOHEXANEDIOLS IS CATALYTICALLY HYDROGENATED AND E) IN A PURE DISTILLATION STAGE, 1,6-HEXANEDIOL IS ISOLATED FROM THE HYDROGENATION PRODUCT IN A MANNER KNOWN PER SE. 3

    72.
    发明专利
    未知

    公开(公告)号:DK1008573T3

    公开(公告)日:2002-07-15

    申请号:DK99122885

    申请日:1999-11-18

    Applicant: BASF AG

    Inventor: PINKOS ROLF DR

    Abstract: A carboxylic acid is used in a process to hydrogenate polyene compounds to monoenes using a ruthenium catalyst. A process to hydrogenate a polyene to a monoene uses a ruthenium catalyst in the presence of a carboxylic acid.

    73.
    发明专利
    未知

    公开(公告)号:AT219035T

    公开(公告)日:2002-06-15

    申请号:AT99122885

    申请日:1999-11-18

    Applicant: BASF AG

    Inventor: PINKOS ROLF DR

    Abstract: A carboxylic acid is used in a process to hydrogenate polyene compounds to monoenes using a ruthenium catalyst. A process to hydrogenate a polyene to a monoene uses a ruthenium catalyst in the presence of a carboxylic acid.

    78.
    发明专利
    未知

    公开(公告)号:DE19648244A1

    公开(公告)日:1998-05-28

    申请号:DE19648244

    申请日:1996-11-21

    Applicant: BASF AG

    Abstract: Method for producing delta - and epsilon -lactones of formula (I), in which the radical R may be the same or different, and stand for hydrogen, optionally substituted aliphatic, cycloaliphatic, aromatic, araliphatic or heterocyclic radicals, which can also be optionally bond to an oxygen atom of C atom and n stands for the numbers 3 or 4. According to said method, dialdehyde of the formula (II) OCH- (CR2)n-CHO, wherein R and n have the meaning cited above, or the mono- and the dihydrates and/or the mono- and the dihemiacetales of said dialdehydes are made to react in heterogeneous catalyzers during the gas or liquid phase at temperatures ranging from 20 to 300 DEG C and pressures ranging from 0.1 to 100 bar and the lactones are obtained in pure form by distillation.

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