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    33.
    发明专利
    未知

    公开(公告)号：ES2083657T3

    公开(公告)日：1996-04-16

    申请号：ES92119691

    申请日：1992-11-19

    Applicant: BASF AG

    Inventor： REUTER PETER DR ,  WEBER WILLI ALBERT ,  DIEM HANS DR

    IPC: C07C209/18

    Abstract: Process for the preparation of N,N-dialkylarylamines (I) by reacting arylamines (II) with alcohols (IIIa) or dialkyl ethers (IIIb) in the presence of an oxyacid of phosphorus or of an ammonium salt thereof as catalyst, characterised in that the oxyacid of phosphorus is reacted with an arylamine (IV) before the beginning of the reaction. The invention furthermore relates to the regeneration of the catalyst, by interrupting the reaction occasionally and treating the catalyst phase with steam or water at 100 to 300 DEG C.

    34.
    发明专利
    未知

    公开(公告)号：DE3783192D1

    公开(公告)日：1993-02-04

    申请号：DE3783192

    申请日：1987-08-25

    Applicant: BASF AG

    Inventor： WEBER ENGELBERT ,  DIEM HANS DR ,  MUEHLTHALER WOLFGANG ,  MATTHIAS GUENTHER DR

    IPC: C08G12/12 ,  C08G12/32 ,  C08G14/06 ,  C09J161/34

    Abstract: The resins (I), with molar ratio U:F 1:1.0-1:2.1 and solids content 58-75 wt.% on total wt. (I) are prepd. by 1) thin layer-evaporating UF precondensate with solids content 38-55 wt.% on wt. (I) to solids content 58-72 wt.% 2) returning 10-60 wt.% prod. to thin layer-evapn. 3) adding aq. U soln. then 4) flash-evaporating prod. directly (i.e., within interval so short that no substantial reaction occurs between U added in 3) and condensate). Opt. UF precondensate is also prepd. with melamine and/or phenol, opt. as precondensates with HCHO. Interval between 3) and 4) is 0.5-5, partic. 1.8-2.5, seconds. Thin layer evapn. is effected in one or more consecutive or parallel stages, partic. in 2 or 3 stages with prod. being returned in each stage. Average film thickness in falling film evaporator(s) is about 1.5 mm, average residence time is 1-10 minutes. Thin film evapn. is carried out with steam at 2-6 bar. Soln. is evaporated at 48-100 deg.C. Mixing is provided between 3) and 4). U soln. in 3) is 60-72 wt.%. Returned part of soln. is treated with 60-72 wt.% soln. of U before again subjecting to thin layer evapn.

    36.
    发明专利
    未知

    公开(公告)号：DE3778763D1

    公开(公告)日：1992-06-11

    申请号：DE3778763

    申请日：1987-06-20

    Applicant: BASF AG

    Inventor： DIEM HANS DR ,  KRAUS FRIEDRICH DR ,  MATTHIAS GUENTHER DR ,  MAURER BRUNO ,  WITTMANN OTTO

    IPC: C08F2/10 ,  C08G12/38 ,  C09J161/20 ,  C09J161/30

    Abstract: The new mixt. contains, by wt., (a) 40-90 pts. urea-HCHO resin having molar ratio urea : HCHO 1 : 1.4 to 1 : 2 (1 : 1.4 to 1 : 1.8) esp. 1 : 1.6. (b) 2-20 pts. melamine which has opt. reacted, partly or completely, with the urea-HCHO resin component, (c) 2-20 pts. urea and (d) opt. 0.1-10 pts. component for increasing the storage stability, as well as up to 10 pts. water and opt. 10 pts. of other additives, provided that the component pts. add up to 100.

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