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    41.
    发明专利
    未知

    公开(公告)号：DE4418488A1

    公开(公告)日：1995-11-30

    申请号：DE4418488

    申请日：1994-05-27

    Applicant: BASF AG

    Inventor： KAIBEL GERD DR

    IPC: B01D3/00 ,  B01D3/14 ,  B01D3/16 ,  B01D3/20 ,  B01D3/32

    Abstract: The distillative sepn. of material mixts. into their pure components comprises using a distn. column contg. complete or part packing of ordered or unordered sepn. elements. Between a boiler and a condenser, rising steam and falling fluid come into intimate contact, and through the resulting mass transfer the lower boiling components are obtd. in the condenser and the higher boiling ones in the column reboiler. In the column, an uneven distribution of the liq. scrubbing density is aimed for across the column cross section. Also claimed is a device to carry out the above process comprising a distn. column with liq. collectors and redistribution devices. According to the desired liq. scrubbing density in the core as well as the wall region of the column, the arrangement of the outflow openings and/or their dia. are optimised.

    42.
    发明专利
    未知

    公开(公告)号：ES2062115T3

    公开(公告)日：1994-12-16

    申请号：ES90101132

    申请日：1990-01-20

    Applicant: BASF AG

    Inventor： KAIBEL GERD DR ,  SCHLOEMER KARL DR ,  MAYER HANS-HORST

    IPC: B01D3/14 ,  C07C7/04 ,  C07C29/80 ,  C07C35/08 ,  C07C35/20 ,  C07C45/82

    Abstract: Process for the separation by distillation of small quantities of a middle-boiling fraction from a liquid mixture by means of a distillation column (main column), comprising a rectification and a stripping component, where the liquid mixture contains relatively large amounts of higher- and lower-boiling constituents, and the rectification component being connected to the upper end and the stripping component to the lower end of a second distillation column (side column), and the middle-boiling fraction being removed in vapour or liquid form from its middle region, the concentration of the middle-boiling fraction in the liquid mixture being less than 2%, preferably less than 0.1%, and the amount of vapour introduced into the side column at its lower end from the main column being 1 to 20%, preferably 3 to 10%, relative to the amount of vapour in the main column at the relevant point.

    44.
    发明专利
    未知

    公开(公告)号：DE3902006A1

    公开(公告)日：1990-07-26

    申请号：DE3902006

    申请日：1989-01-25

    Applicant: BASF AG

    Inventor： KAIBEL GERD DR ,  SCHLOEMER KARL DR ,  MAYER HANS-HORST

    IPC: B01D3/14 ,  C07C7/04 ,  C07C29/80 ,  C07C35/08 ,  C07C35/20 ,  C07C45/82

    Abstract: Process for the separation by distillation of small quantities of a middle-boiling fraction from a liquid mixture by means of a distillation column (main column), comprising a rectification and a stripping component, where the liquid mixture contains relatively large amounts of higher- and lower-boiling constituents, and the rectification component being connected to the upper end and the stripping component to the lower end of a second distillation column (side column), and the middle-boiling fraction being removed in vapour or liquid form from its middle region, the concentration of the middle-boiling fraction in the liquid mixture being less than 2%, preferably less than 0.1%, and the amount of vapour introduced into the side column at its lower end from the main column being 1 to 20%, preferably 3 to 10%, relative to the amount of vapour in the main column at the relevant point.

    46.
    发明专利
    未知

    公开(公告)号：AT253542T

    公开(公告)日：2003-11-15

    申请号：AT01120387

    申请日：2001-08-25

    Applicant: BASF AG

    Inventor： THERRE JOERG DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  WEGNER GUENTER DR ,  FUCHS HARTWIG

    IPC: C07C41/50 ,  C07B61/00 ,  C07C41/56 ,  C07C41/58 ,  C07C43/303

    Abstract: Preparation of acetals by reaction of 1 mol. of an unsaturated aldehyde with 1 mol. of an unsaturated alcohol in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. Preparation of acetals (I) by reaction of 1 mol. of an unsaturated aldehyde (II) with 1 mol. of an unsaturated alcohol (III) in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. R - R = H or optionally substituted 1-6C alkyl; and R = H, an optionally mono- or poly-unsaturated, optionally substituted 1-12C alkyl or an optionally substituted 3-12-membered optionally mono- or poly-unsaturated carbon ring.

    48.
    发明专利
    未知

    公开(公告)号：ES2183038T3

    公开(公告)日：2003-03-16

    申请号：ES97106627

    申请日：1997-04-22

    Applicant: BASF AG

    Inventor： KAIBEL GERD DR ,  STROEZEL MANFRED ,  RHEUDE UDO DR

    IPC: B01D3/14 ,  B01D3/16 ,  B01D3/32 ,  B01J19/32

    Abstract: A partitioned column for separating a multi-component mixture into three or more fractions comprises at least one removable partition wall. Also claimed is a process for separating a multi-component mixture into three or more fractions using the above column.

    49.
    发明专利
    未知

    公开(公告)号：AT232193T

    公开(公告)日：2003-02-15

    申请号：AT99118458

    申请日：1999-09-17

    Applicant: BASF AG

    Inventor： THERRE JOERG DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  WEGNER GUENTER DR ,  FUCHS HARTWIG

    IPC: B01J27/16 ,  C07B61/00 ,  C07C41/28 ,  C07C43/15 ,  C07C45/37 ,  C07C45/51 ,  C07C45/54 ,  C07C45/67 ,  C07C47/21 ,  C07C49/203

    Abstract: Preparation of citral (I) comprises thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal and rearrangement of obtained intermediates cis/trans-prenyl-(methyl-butadienyl)-ether (IV) and 2,4,4-trimethyl-3-formyl-1,5-hexadiene (V). (IV) and (V) are continuously distilled off and converted into (I) before or after removal of by-product prenol. Preparation of 3,7-dimethyl-2,6-octadien-1-al (citral) of formula (I) comprises: (1) thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal of formula (II) optionally in the presence of an acid catalyst to split off 3-methyl-buten-1-ol (prenol) of formula (III) and form cis/trans-prenyl-(methyl-butadienyl)-ether of formula (IV); (2) Claisen rearrangement of (IV) to give 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula (V); and (3) Cope rearrangement of (V) to form (I). The transitionally formed (IV) and (V) and the desired citral as well as the prenol (III) are continuously distilled out of the reaction mixture and (IV) and (V), before or after distillative separation of (III) and optional by-products, are subjected to rearrangement to form (I) at 100-200 degrees C.

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