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    Distillation system composed of two distillation columns for the energy-efficient fractionation by distillation of a feed product composed of a plurality of fractions
    121.
    发明专利
    Distillation system composed of two distillation columns for the energy-efficient fractionation by distillation of a feed product composed of a plurality of fractions 未知

    公开(公告)号：DE3514365A1

    公开(公告)日：1985-10-31

    申请号：DE3514365

    申请日：1985-04-20

    Applicant: BASF AG

    Inventor： KAIBEL GERD

    IPC: B01D3/14

    Abstract: A distillation system composed of two distillation columns for the energy-efficient fractionation by distillation of a feed product, which enters the first distillation column at a feed site and is composed of a plurality of fractions, into a pure head fraction and a pure bottom fraction and a plurality, preferably one or two, of free or substantially free medium-boiling fractions in the boiling range between the head fraction and bottom fraction, in which - the first distillation column (1) is equipped with an evaporator (3) and the second distillation column (2) is equipped with a condenser (4), - two vaporous product streams (5 and 6) are taken off from the first distillation column at the head, from the stripping section, the (upper) product stream (5) taken off at the head being fed to the second distillation column between the head and the side take-off points of the medium-boiling fractions and the (lower) product stream (6) taken off in the stripping section being fed to the second distillation column at the bottom, - two liquid product streams (7 and 8) being taken off from the second distillation column in the region of the feed of the upper product stream (5) and in the bottom, the product stream (7) taken off in the region of the feed of the upper product stream (5) being fed to the first distillation column at the head and the product stream (8) taken off in the bottom being fed to the first distillation column in the region of the take-off of the lower product stream (6), and - the medium-boiling fractions from the second ... Original abstract incomplete.

    Process for the preparation of trimethyl borate
    126.
    发明专利
    Process for the preparation of trimethyl borate 未知

    公开(公告)号：DE3324419A1

    公开(公告)日：1984-01-12

    申请号：DE3324419

    申请日：1983-07-07

    Applicant: BASF AG

    Inventor： HARTMANN HORST ,  KAIBEL GERD ,  KIENER VOLKER DR ,  WOERZ OTTO DR

    IPC: C07F5/04

    Abstract: A process for the preparation of trimethyl borate by reaction of boric acid or boron trioxide and methanol in a distillation column having at least 15 separating stages and having a supply of the starting substances in a molar ratio of 3.7 to 5.5 mol of methanol per mol of boric acid at a bottom temperature of 70 to 150 DEG C and a temperature in the top of the column of 25 to 115 DEG C, water being withdrawn from the bottom and advantageously a fraction of the bottom liquid being drawn off from the bottom and fed back into the column above the bottom, and trimethyl borate and unreacted methanol being removed at the top of the column. The trimethyl borate which can be prepared by the process of the invention is used as a precursor for the preparation of boranes or sodium borohydride.

    PROCESS FOR THE PRODUCTION OF HIGHER UNSATURATED KETONES
    128.
    发明专利
    PROCESS FOR THE PRODUCTION OF HIGHER UNSATURATED KETONES 未知

    公开(公告)号：DE3063676D1

    公开(公告)日：1983-07-14

    申请号：DE3063676

    申请日：1980-07-01

    Applicant: BASF AG

    Inventor： NISSEN AXEL DR ,  KAIBEL GERD ,  WOERZ OTTO ,  ARNOLD LOTHAR DR ,  BRAUN MANFRED ,  REBAFKA WALTER DR

    IPC: C07C49/20 ,  B01J31/14 ,  C07C45/00 ,  C07C45/67 ,  C07C45/68 ,  C07C49/203 ,  C07C67/00

    Abstract: An improved process for the preparation of higher unsaturated ketones, such as geranylacetone and farnesylacetone, by reacting a beta , gamma -unsaturated alcohol and an alkyl acetoacetate at an elevated temperature in the presence of an organic aluminum compound, with elimination, and removal, of the alcohol derived from the alkyl acetoacetate in a reactor system carrying a fractionating column. The improvement in the purity, yield, and especially space-time yield of the product is achieved by starting from an alcohol having a higher boiling point than that of the alkyl acetoacetate used, carrying out the reaction in the presence of a small amount of an inert liquid which has a boiling point between that of the alkyl acetoacetate and the alcohol to be eliminated therefrom, and ensuring that the temperature at the bottom of the fractionating column is only slightly higher than the boiling point of the added liquid, under the prevailing pressure.

    PRODUCTION OF ANHYDROUS OR SUBSTANTIALLY ANHYDROUS FORMIC ACID
    129.
    发明专利
    PRODUCTION OF ANHYDROUS OR SUBSTANTIALLY ANHYDROUS FORMIC ACID 未知

    公开(公告)号：CA1135281A

    公开(公告)日：1982-11-09

    申请号：CA341669

    申请日：1979-12-11

    Applicant: BASF AG

    Inventor： BOTT KASPAR ,  KAIBEL GERD ,  HOFFMANN HERWIG ,  KRATZER OTTO ,  IRNICH RUDOLF

    IPC: C07C53/02 ,  C07C51/00 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00

    Abstract: A process for the production of anhydrous or substantially anhydrous formic acid by hydrolysis of methyl formate which is carried out in a column and in which a) the hydrolysis 15 carried out in the middle section of the column, with water and methyl formate in countercurrent, b) the resulting formic acid is extracted, in the lower section of the column, by means of a carboxylic acid amide of the general formula I I where Rl and R2 are alkyl, which may also be linked to form a 5-membered or 6-membered ring, or are cyclohexyl, and R3 is hydrogen or Cl-C4-alkyl, the sum of the carbon atoms in radicals R1, R2 and R3 being from 7 to 14, the carboxylic acid amide being fed into the lower end of the middle section of the column, c) the extract phase, consisting in the main of formic acid and the carboxylic acid amide, is distillatively dehydrated, or substantially dehydrated, in the lower section of the column, d) the methanol and uncoverted methyl formate are removed by fractional distillation in the upper section of the column and e) the pure formic acid or concentrated aqueous formic acid is distilled from the anhydrous or substantially anhydrous extract phase in a second column, leaving the carboxylic acid amide.

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