2.
    发明专利
    未知

    公开(公告)号:AT343561T

    公开(公告)日:2006-11-15

    申请号:AT03794858

    申请日:2003-08-08

    Applicant: BASF AG

    Abstract: Recovery of isophoronediamine (IPDA) comprises preparation of IPDA having a cis/trans isomer ratio of less than 73/27 and separation into at least 5 fractions by distillation including an IPDA fraction having a cis/trans ratio of greater than 73/27 and a fraction having a cis/trans ratio of less than 66/34. A process for the recovery of 3-aminomethyl-3,5,5-trimethylcyclohexylamine (isophoronediamine, IPDA) comprises; (a) preparation of IPDA having a cis/trans isomer ratio of less than 73/27; (b) introduction of IPDA to the middle region of a distillation column having inserts and distillation of IPDA at 5-300 degreesC and 10-2000 mbar; (c) optionally further purification of the IPDA from (b) by distillation in at least one further column whereby the IPDA from step (b) and (c) are separated into at least 5 fractions comprising an organic fraction (1a) containing impurities having a lower b. pt. than trans-IPDA, an aqueous fraction (1b) containing impurities having a lower b. pt. than trans-IPDA, a fraction (2) containing impurities having a higher b. pt. than cis-IPDA, an IPDA fraction (3) having a cis/trans ratio of greater than 73/27 and an IPDA fraction (4) having a cis/trans ratio of less than 66/34.

    3.
    发明专利
    未知

    公开(公告)号:AT217860T

    公开(公告)日:2002-06-15

    申请号:AT98906939

    申请日:1998-02-09

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP98/00705 Sec. 371 Date Jul. 28, 1999 Sec. 102(e) Date Jul. 28, 1999 PCT Filed Feb. 9, 1998 PCT Pub. No. WO98/37054 PCT Pub. Date Aug. 27, 1998A process for the isolation of 3-[2-chloro-4-(trifluoromethyl)phenoxy]benzoic acid of the formula I from an aqueous solution of its metal salt comprises a) reacting the metal salt of 3-[2-chloro-4-(trifluoromethyl)phenoxy]benzoic acid with an organic or inorganic acid; b) heating the reaction mixture until a liquid two-phase system of organic and aqueous phase has formed; and c) separating the organic phase from the aqueous phase.

    METHOD FOR PRODUCING IPDA WITH A HIGH CIS/TRANS ISOMER RATIO BY DISTILLATION

    公开(公告)号:AU2003258591A1

    公开(公告)日:2004-04-30

    申请号:AU2003258591

    申请日:2003-08-08

    Applicant: BASF AG

    Abstract: Recovery of isophoronediamine (IPDA) comprises preparation of IPDA having a cis/trans isomer ratio of less than 73/27 and separation into at least 5 fractions by distillation including an IPDA fraction having a cis/trans ratio of greater than 73/27 and a fraction having a cis/trans ratio of less than 66/34. A process for the recovery of 3-aminomethyl-3,5,5-trimethylcyclohexylamine (isophoronediamine, IPDA) comprises; (a) preparation of IPDA having a cis/trans isomer ratio of less than 73/27; (b) introduction of IPDA to the middle region of a distillation column having inserts and distillation of IPDA at 5-300 degreesC and 10-2000 mbar; (c) optionally further purification of the IPDA from (b) by distillation in at least one further column whereby the IPDA from step (b) and (c) are separated into at least 5 fractions comprising an organic fraction (1a) containing impurities having a lower b. pt. than trans-IPDA, an aqueous fraction (1b) containing impurities having a lower b. pt. than trans-IPDA, a fraction (2) containing impurities having a higher b. pt. than cis-IPDA, an IPDA fraction (3) having a cis/trans ratio of greater than 73/27 and an IPDA fraction (4) having a cis/trans ratio of less than 66/34.

    9.
    发明专利
    未知

    公开(公告)号:BR9807583A

    公开(公告)日:2000-03-21

    申请号:BR9807583

    申请日:1998-02-09

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP98/00705 Sec. 371 Date Jul. 28, 1999 Sec. 102(e) Date Jul. 28, 1999 PCT Filed Feb. 9, 1998 PCT Pub. No. WO98/37054 PCT Pub. Date Aug. 27, 1998A process for the isolation of 3-[2-chloro-4-(trifluoromethyl)phenoxy]benzoic acid of the formula I from an aqueous solution of its metal salt comprises a) reacting the metal salt of 3-[2-chloro-4-(trifluoromethyl)phenoxy]benzoic acid with an organic or inorganic acid; b) heating the reaction mixture until a liquid two-phase system of organic and aqueous phase has formed; and c) separating the organic phase from the aqueous phase.

    Cleaning device for road and rail tankers using thermal degradation of vapor and off-gases before discharging to atmosphere

    公开(公告)号:DE19823899A1

    公开(公告)日:1999-12-02

    申请号:DE19823899

    申请日:1998-05-28

    Applicant: BASF AG

    Abstract: A tanker (I) is washed with high pressure water (1) with the effluent liquid passing to storage/disposal (II), and any displaced vapors being pumped away by a pump (III) via a water disentrainment device (IV) and fed into a combustion chamber (V) from where combustion products are cooled through a heat recovery unit (VI) before being washed with alkaline solution in a scrubber (VII) and discharged to the atmosphere via a stack (VIII). A tanker (I), in a cleaning station, is washed with high pressure water (1), optionally containing detergents, with the effluent liquid passing to storage/disposal (II), and any displaced vapors, etc. being pumped away by a pump (III) via a water disentrainment device (IV) and fed into a combustion chamber (V) maintained at 800-1200 deg C. The combustion products from the furnace (V) are cooled through a heat recovery unit (VI) before being washed with alkaline solution in a scrubber (VII) and discharged to atmosphere via a stack (VIII). The vapor pump may be a liquid ring pump or a fan, etc.

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