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122 records (took 0.02 seconds)

    91.
    发明专利
    未知

    公开(公告)号：ES2063089T3

    公开(公告)日：1995-01-01

    申请号：ES89115340

    申请日：1989-08-19

    Applicant: BASF AG

    Inventor： BERBNER HEINZ ,  EBEL KLAUS DR ,  KUCZATY MICHAEL ,  SEID BERNHARD ,  WOERNER FRANK PETER DR ,  ZETTLER HANS DIETER

    IPC: C08G12/32

    Abstract: The present invention relates to a process for the continuous preparation of melamine-formaldehyde precondensate solutions, characterised in that melamine, formaldehyde and optionally modifiers and/or additives are metered into a continuous mixture, the homogeneous mixture is passed into a single- or twin-screw extruder, condensed at elevated temperature, cooled and discharged.

    93.
    发明专利
    未知

    公开(公告)号：DE4219789A1

    公开(公告)日：1993-12-23

    申请号：DE4219789

    申请日：1992-06-17

    Applicant: BASF AG

    Inventor： EBEL KLAUS DR ,  SCHROEDER JUERGEN DR

    IPC: C07D239/06 ,  C07D239/26

    Abstract: Pyrimidines of the general formula I in which R denotes C1- to C8-alkyl, C7- to C12-aralkyl or phenyl and R , R and R independently of one another denote hydrogen, C1- to C8-alkyl, C7- to C12-aralkyl or phenyl, are prepared by reacting carbonitriles of the general formula II R -C IDENTICAL N (II> in which the substituent R has the abovementioned meaning, with 1,3-diaminopropanes of the general formula III in which the substituents R to R have the abovementioned meanings, in the presence of copper(II) acetate at temperatures from 150 to 250 DEG C to give the tetrahydropyrimidine of the general formula IV in which the substituents R to R have the abovementioned meanings, and dehydrogenating the tetrahydropyrimidine of the formula IV to the pyrimidine of the formula I using Raney nickel at temperatures from 150 to 300 DEG C.

    94.
    发明专利
    未知

    公开(公告)号：DE3586232D1

    公开(公告)日：1992-07-23

    申请号：DE3586232

    申请日：1985-10-12

    Applicant: BASF AG

    Inventor： EBEL KLAUS DR ,  REUTHER WOLFGANG DR

    IPC: C07D251/70

    Abstract: N,N',N''-tris(2 -hydroxypropyl)melamine (I) is prepd. by reacting melamine (II) with isopropanolamine (III) in the presence of acid catalysts at a temp. of 120-300 deg. C, using excess (III) such that the molar ratio of free (III) to the sum of free and converted (II) does not fall below 4:1 during the whole reaction period.

    95.
    发明专利
    未知

    公开(公告)号：DE4015535A1

    公开(公告)日：1991-11-21

    申请号：DE4015535

    申请日：1990-05-15

    Applicant: BASF AG

    Inventor： EBEL KLAUS DR

    IPC: C07D233/54 ,  C07D233/58 ,  C07D233/64 ,  C07D233/68 ,  C07D521/00

    Abstract: Process for the preparation of N-substituted imidazoles of the general formula I … … in which the substituents …… R denotes C1- to C20-alkyl, C2- to C20-alkenyl, C2- to C20-alkynyl, C2- to C20-alkoxyalkyl, C3- to C20-alkenyloxyalkyl, C3- to C12-cycloalkyl, C4- to C20-cycloalkylalkyl, aryl which is unsubstituted or substituted by C1- to C8-alkyl, C1- to C8-alkoxy, halogen, C1- to C4-haloalkyl, C1- to C4-haloalkoxy or phenoxy or denotes C7- to C20-arylalkyl, … the substituents R , R , R , independently of one another, denote hydrogen, C1- to C20-alkyl, C2- to C20-alkoxyalkyl, C3- to C12-cycloalkyl, halogen, aryl which is unsubstituted or substituted by C1- to C8-alkyl, C1- to C8-alkoxy, halogen, C1- to C4-haloalkyl, C1- to C4-haloalkoxy or phenoxy or denote C7- to C20-arylalkyl or R and R together denote a (CH2)n or (CH=CH)m group which is unsubstituted or mono- or disubstituted by C1- to C8-alkyl, C1- to C8-alkoxy and/or halogen and in which n represents 1 to 6 and m represents 1 to 3, … by reaction of imidazoles of the general formula II … … in which R , R and R have the abovementioned meanings, with halides of the general formula III… R -X (III> in which X represents chlorine, bromine or iodine and R has the abovementioned meanings, in aqueous hydroxide solutions at temperatures of 0 to 100 DEG C by carrying out the reaction in the presence of 0.1 to 50 mol % of an N-substituted imidazole, relative to II.

    96.
    发明专利
    未知

    公开(公告)号：DE3835195A1

    公开(公告)日：1990-04-19

    申请号：DE3835195

    申请日：1988-10-15

    Applicant: BASF AG

    Inventor： KOEHLER HERMANN DR ,  EBEL KLAUS DR ,  KARN HELMUT ,  TAUBITZ CHRISTOF DR

    IPC: C07D233/54 ,  C07D233/64

    Abstract: Process for the preparation of imidazoles substituted in the 2- and/or 4- and/or 5-position by p-nitrophenyl and, if appropriate, additional substituents by reaction of imidazoles substituted in the 2- and/or 4- and/or 5-position by phenyl and, if appropriate, additional substituents with mixtures of sulphuric acid and nitric acid, by carrying out the reaction in the presence of urea.

    100.
    发明专利
    未知

    公开(公告)号：DE50209961D1

    公开(公告)日：2007-05-31

    申请号：DE50209961

    申请日：2002-12-03

    Applicant: BASF AG

    Inventor： GOEBBEL HANS-GEORG DR ,  GERLACH TILL DR ,  FUNKE FRANK DR ,  EBEL KLAUS DR ,  UNVERRICHT SIGNE DR ,  KAIBEL GERD DR

    IPC: C07C29/141 ,  C07B61/00 ,  C07C33/03

    Abstract: Selective hydrogenation of alpha , beta -ethylenically unsaturated aldehydes (II) to corresponding unsaturated alcohols (I) comprises performing reaction in a reactor containing a liquid phase, suspended catalyst and optionally a gas phase, The liquid phase and gas phase (if present) are supplied to the reactor through a device (A) with openings or channels having a hydraulic diameter of 0.5-2 mm. Selective hydrogenation of unsaturated aldehydes of formula R R C=CR -CHO (II) to corresponding alcohols of formula R R C=CR -CH2OH (I) comprises performing the reaction in a reactor containing a liquid phase, suspended catalyst and optionally a gas phase. The liquid phase and optionally the gas phase are supplied to the reactor through a device (A) with openings or channels having a hydraulic diameter of 0.5-2 mm. R , R = H, optionally substituted mono- or polyunsaturated 1-20C alkyl (sic; some of the groups exemplified in the disclosure are saturated), optionally substituted aryl or optionally substituted heterocyclyl; R = H or 1-4C alkyl.

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