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122 records (took 0.029 seconds)

    114.
    发明专利
    未知

    公开(公告)号：DE58908582D1

    公开(公告)日：1994-12-08

    申请号：DE58908582

    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.

    115.
    发明专利
    未知

    公开(公告)号：DE4233387A1

    公开(公告)日：1994-04-07

    申请号：DE4233387

    申请日：1992-10-05

    Applicant: BASF AG

    Inventor： EBEL KLAUS DR ,  SCHROEDER JUERGEN DR

    IPC: C07C11/12 ,  C07C33/03 ,  C07C33/042 ,  C07C49/675 ,  C07C50/16 ,  C07C33/025

    Abstract: tert-Amyl compounds of the general formula I in which R is and novel processes for the preparation of 2-tert-amylbutadiene by dehydration of 3,4,4-trimethylhex-1-en-3-ol at temperatures from 100 to 350@C and pressures from 0.01 to 50 bar on acidic catalysts, their preparation by partial hydrogenation of 3,4,4-trimethylhex-1-in-3-ol at temperatures from 0 to 50@C and pressures from 0.01 to 50 bar, and their preparation by reacting tert-amyl methyl ketone (3,3-dimethylpentan-2-one) with acetylene in the presence of basic catalysts at temperatures from 0 to 60@C and pressures from 0.01 to 50 bar, furthermore the reaction of 2-tert-amylbutadiene with 1,4-naphthoquinone at temperatures from 20 to 200@C and pressures from 0.01 to 50 bar to give 2-tert-amyl-1,4,4a,9a-tetrahydroanthraquinone, followed by oxidation at temperatures from 0 to 50@C in the presence of a strong base.

    Catalytic prodn. of formaldehyde condensn. prod. - using meso-ionic heterocyclic catalyst giving e.g. glyceraldehyde
    118.
    发明专利
    Catalytic prodn. of formaldehyde condensn. prod. - using meso-ionic heterocyclic catalyst giving e.g. glyceraldehyde 未知

    公开(公告)号：DE4212264A1

    公开(公告)日：1993-10-14

    申请号：DE4212264

    申请日：1992-04-11

    Applicant: BASF AG

    Inventor： GEHRER EUGEN DR ,  HARDER WOLFGANG DR ,  EBEL KLAUS DR

    IPC: B01J31/02 ,  C07B61/00 ,  C07C45/75 ,  C07C47/19 ,  C07D233/88 ,  C07D249/14 ,  C07D277/42 ,  C07D257/06

    Abstract: Prepn. of condensn. prods. of formaldehyde is effected using a mesoionic catalyst of formula (I), where X = N,P or CR3; Y = O, S or Se, or NR4 or PR5; Z = N, P or CR6; R1,R2 = 1-30C alkyl, opt. substd. aryl, opt. substd. aralkyl, heteroaryl and/or nitrilo; R3,R6 = H, O, 1-3c alkyl, opt. substd. aryl or aralkyl, opt. substd. heteroaryl, hydroxyl, nitrilo and/or NH2; R4,R5 = O, 1-30c alkyl, opt. substd. aryl, aralkyl or heteroaryl, hydroxyl, nitrilo or NH2; or the gp. R2 forms a 2-5C alkylene or alkenylene, or a 6-14C arylene, bridge with R4 or R5; or the gp. R6 forms a 3-4C alkylene or alkenylene bridge with R4 or R5. Also claimed is a mesoionic tetrazolium cpd. of formula (II). USE/ADVANTAGE - The catalyst gives a different spectrum of prods. compared to the known thiazolium catalysts, esp. glycoaldehyde and glyceraldehyde, useful for the prepn. of ethylene glycol, glyoxal, and glycerine. In an example, 4 g of paraformaldehye, 0.201 g of nitron, 15.8 g of ethyl acetate and 0.2 g of molecular sieve were heated at 80 deg. C. for 15 mins. There was a conversion of 29.4 %, with a selectivity of 86.2 % for glycoaldehyde and of 10.1 % for glyceraldehyde.

    119.
    发明专利
    未知

    公开(公告)号：DE4204969A1

    公开(公告)日：1993-08-26

    申请号：DE4204969

    申请日：1992-02-19

    Applicant: BASF AG

    Inventor： EBEL KLAUS DR ,  SCHROEDER JUERGEN DR

    IPC: C07C319/14 ,  C07C323/22 ,  C07D333/54

    Abstract: Process for the preparation of benzo[b]thiophenes of the general formula I in which R ,R ,R ,R independently of one another denote hydrogen, C1- to C4-alkyl, C1- to C4-alkoxy, C1- to C4-haloalkyl, nitro, cyano, halogen, C1- to C4-alkylcarbonyl, benzoyl, C1- to C4-alkylcarbonylamino, benzoylamino, N-C1- to C4-alkylphenylamino, C1- to C4-alkoxycarbonyl, C1- to C4-alkylsulphonyl, phenylsulphonyl, aminosulphonyl, aminocarbonyl, C1- to C4-phenylalkyl and nitrobenzyl or R , R or R , R or R , R denote a butadienyl chain which is optionally substituted by R to R , by a) reacting thiophenols of the general formula II in which the substituents R to R have the abovementioned meanings, with chloroacetaldehyde at temperatures from 0 to 150 DEG C and b) cyclising the resultant (arylthio)acetaldehyde of the general formula III in which the substituents R to R have the abovementioned meanings, by introducing it into polyphosphoric acid or a mixture of phosphoric acid and phosphorus pentoxide at temperatures of from 100 to 300 DEG C and pressures from 0.001 to 1 bar.

    120.
    发明专利
    未知

    公开(公告)号：DE4134808A1

    公开(公告)日：1993-04-29

    申请号：DE4134808

    申请日：1991-10-22

    Applicant: BASF AG

    Inventor： MERGER FRANZ DR ,  EBEL KLAUS DR ,  BRUDERMUELLER MARTIN DR

    IPC: C07D233/61 ,  C07D233/88 ,  C07D233/90

    Abstract: 1,1'-Bis-(3-aminopropyl)-2,2'-diimidazole of the formula I, and a novel process for the preparation of 1,1'-bis-(3-aminopropyl)-2,2'-diimidazole of the formula I, in which 2,2'-diimidazole of the formula II, is reacted with acrylonitrile of the formula III, in the presence of basic catalysts at temperatures from 80 to 150 DEG C, and the product is hydrogenated with an excess of hydrogen on cobalt-, nickel-, ruthenium- and/or noble-metal-containing catalysts in the presence of ammonia, at temperatures from 40 to 200 DEG C and under pressures from 10 to 200 bar.

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