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    11.
    发明专利
    未知

    公开(公告)号：DE50110518D1

    公开(公告)日：2006-09-07

    申请号：DE50110518

    申请日：2001-05-03

    Applicant: BASF AG

    Inventor： RUST HARALD ,  KAIBEL GERD

    IPC: B01D3/14

    Abstract: Separating wall column comprises an upper column region (6), a feed part (7), a removal part (8) and a lower column region (9) as segments. The feed part and the removal part are separated from each other by a separating wall (10) fixed in the column. The separating wall is partially formed from an elastic material and has a low over-dimension with respect to its width. The wall is fixed in the column so that it exerts an elastic force on the inner casing of the column. Preferred Features: The separating wall is completely formed from an elastic material and is present as a one piece strip. The wall is made from PTFE or a corrosion resistant chromium-nickel high grade steel. The side edges of the wall have an angle of 20-60 degrees . The wall has a thickness of 0.05-1, preferably 0.1-0.3 mm.

    13.
    发明专利
    未知

    公开(公告)号：ES2218186T3

    公开(公告)日：2004-11-16

    申请号：ES00949204

    申请日：2000-06-21

    Applicant: BASF AG

    Inventor： STEIN FRANK ,  KRUG THOMAS ,  NOBEL THOMAS ,  RUST HARALD

    IPC: C07B61/00 ,  C07C29/149 ,  C07C31/20

    Abstract: A process for preparing 1,6-hexanediol from a carboxylic acid mixture comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols which is obtained as by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol after water extraction of the reaction mixture followed by extraction with aqueous sodium hydroxide solution, by esterification of the acids and hydrogenation comprisesa) liberating the carboxylic acids from the alkaline extract by addition of a mineral acid,b) fractionating the organic phase comprising carboxylic acids to give a distillate comprising the low molecular weight monocarboxylic acids and a residue comprising adipic acid and 6-hydroxycaproic acid,c) reacting the monocarboxylic an dicarboxylic acids present in the aqueous dicarboxylic acid mixture with a low molecular weight alcohol to give the corresponding carboxylic esters,d) freeing the esterification mixture obtained of excess alcohol and low boilers in a first distillation step,e) fractionating the bottom product in a second distillation step to give an ester fraction essentially free of 1,4-cyclohexanediols and a fraction comprising at least the major part of the 1,4-cyclohexanediols,f) catalytically hydrogenating the ester fraction which is essentially free of 1,4-cyclohexanediols andg) isolating 1,6-hexanediol from the hydrogenation product in a manner known per se in a final distillation step.

    17.
    发明专利
    未知

    公开(公告)号：PT906281E

    公开(公告)日：2002-05-31

    申请号：PT97927086

    申请日：1997-05-30

    Applicant: BASF AG

    Inventor： TOM WITZEL DR ,  SIEGEL HARDO ,  RUST HARALD ,  JULIUS MANFRED ,  KRAUSE ALFRED ,  SIEGEL WOLFGANG

    IPC: C07D211/58 ,  C07D211/56 ,  C07D221/20

    Abstract: PCT No. PCT/EP97/02822 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 30, 1997 PCT Pub. No. WO97/46529 PCT Pub. Date Dec. 11, 1997A process for purifying crude piperidines of the formula I where R1 to R4 are C1-C6-alkyl, or R1 and R2 and/or R3 and R4 together are a CH2-chain of 2 to 5 carbons, which comprises, in a first step, removing high-boiling substances and, if present, water from the crude piperidines by distillation; in a second step, adding from 0.01 to 5% by weight, based on the product of the first step, as a reducing agent; and, in a third step, isolating the piperidines by distillation.

    18.
    发明专利
    未知

    公开(公告)号：DE19929831A1

    公开(公告)日：2001-01-04

    申请号：DE19929831

    申请日：1999-06-30

    Applicant: BASF AG

    Inventor： STEIN FRANK ,  KRUG THOMAS ,  NOEBEL THOMAS ,  RUST HARALD

    IPC: C07B61/00 ,  C07C29/149 ,  C07C31/20 ,  C07C29/74

    Abstract: The invention relates to a method for producing hexane diol-1,6 from a mixture of an adipic acid, 6-hydroxycapric acid and a carboxylic acid which contains small quantities of 1,4-cyclohexanediols which is obtained as a by-product during the oxidation of cyclohexane to cyclohexanon/cyclohexanol after the extraction of water from the reaction mixture by subsequent extraction, using aqueous caustic soda lye. The hexane diol-1,6 is produced by means of the esterification of the acids and hydrogenation. According to said method a) the carboxylic acids are liberated from the alkaline extract by the addition of a mineral acid, b) the organic phase which contains carboxylic acids is separated into a distillate which contains the low-molecular monocarboxylic acids and a residue which contains the adipic acid and 6-hydroxycapric acid, c) the mono and dicarboxylic acids, contained in the aqueous dicarboxylic acid mixture are reacted with a low-molecular alcohol into the corresponding carboxylic acid esters, d) superfluous alcohol and agents with a low-boiling point are liberated from the resultant esterification mixture in a first distillation stage, e) the residual product is separated in a second distillation stage into an ester fraction which is substantially devoid of 1,4-cyclohexanediols and a fraction which contains at least the greater part of the 1,4-cyclohexanediols, f) the ester fraction which is substantially devoid of 1,4-cyclohexandiols is catalytically hydrogenated and g) hexanediol-1,6 is obtained from the hydrogenation product in a pure distillation stage in the known manner.

    19.
    发明专利
    未知

    公开(公告)号：DE19907532A1

    公开(公告)日：2000-08-31

    申请号：DE19907532

    申请日：1999-02-22

    Applicant: BASF AG

    Inventor： BRUNNER MELANIE ,  HENKELMANN JOCHEM ,  KAIBEL GERD ,  KINDLER ALOIS ,  KNOLL CHRISTIAN ,  RUST HARALD ,  TRAGUT CHRISTIAN

    IPC: C07C29/17 ,  C07C29/42 ,  C07C29/74 ,  C07C31/18 ,  C07C33/044

    Abstract: The invention relates to a method for preparing at least one unsaturated alcohol (B). The method comprises the following steps (I) to (III): (I) reaction of at least one alkali or alkaline earth hydroxide with at least one alcohol (A) in at least one organic solvent (L) so that a mixture (G-I) is obtained which contains at least the alcohol (A), the solvent (L) and an alcoholate (AL); (II) reaction of at least one carbonyl compound of the general structure R-CO-R' with at least one alkine of the general structure R"-CC-H and the mixture (G-I) obtained in step (I) above, so that a mixture (G-II) is obtained which contains at least the alcohol (A), the solvent (L) and an unsaturated alcohol (B); and (III) distillation of the mixture (G-II) obtained in step (II) above so that the at least one alcohol (B) and a mixture (G-III) containing the solvent (L) and the alcohol (A), are obtained. Said method is characterized in that the solvent (L) and the alcohol (A) obtained in step (III) are fed back to step (I) as a mixture.

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