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    Static mixer tube for fluids - with holes in some inclined elliptical mixing elements
    6.
    发明专利
    Static mixer tube for fluids - with holes in some inclined elliptical mixing elements 未知

    公开(公告)号：DE2810648A1

    公开(公告)日：1979-09-13

    申请号：DE2810648

    申请日：1978-03-11

    Applicant: BASF AG

    Inventor： SCHUSTER HANS H DIPL CHEM DR ,  ZEHNER PETER DIPL ING DR

    IPC: B01F5/06 ,  B01F5/02

    Abstract: Parent patent 2525020 described a mixer for fluid materials, consisting of a tube with mixing elements in the shape of inclined intersecting guide surfaces which are provided with passage openings. These split the fluid stream into many side streams. Each element is elliptical, with an angle of 30 degrees - 60 degrees to the centre line; an elliptical opening with a minor axis amounting to 0.4-0.6 times the tube dia. is punched out and the punched out disc is welded at right angles to the main element. The circular holes in the elements pref. have the punched out part adhering to the element but at an acute angle.

    Process for the preparation of polyphenylene ethers
    7.
    发明专利
    Process for the preparation of polyphenylene ethers 未知

    公开(公告)号：DE3214425A1

    公开(公告)日：1983-11-10

    申请号：DE3214425

    申请日：1982-04-20

    Applicant: BASF AG

    Inventor： HAMBRECHT JUERGEN DIPL CHEM DR ,  NAARMANN HERBERT DIPL CHEM DR ,  SCHUSTER HANS H DIPL CHEM DR ,  ECHTE ADOLF DIPL CHEM DR ,  SWOBODA JOHANN DIPL CHEM DR ,  HEILIG JEAN-CLAUDE DIPL CHEM D

    IPC: C08G65/44

    Abstract: The invention relates to a process for the preparation of high-molecular-weight polyphenylene ethers from monohydric phenols having alkyl substituents, by oxidative coupling reaction with oxygen in the presence of a copper salt/amine catalyst complex and in the presence of an aromatic C6- to C10-hydrocarbon as solvent, where the amine component is a combination of a N-hydrocarbon-substituted imidazole and a diamine of the formula R HN-R -NHR and/or a secondary monoamine of the formula R NH-R and/or a primary and/or a tertiary amine, and where the substituents R and R of the diamine and of the secondary monoamine and the substituents of the primary and tertiary amine are lower alkyl and/or cycloalkyl groups having 1 to 12 carbon atoms, and the radicals R are alkylene groups having 2 to 4 carbon atoms. Particularly suitable N-hydrocarbon-substituted imidazoles are N-methyl-, N-ethyl-, N-isopropyl-, N-n-butyl-, N-cyclohexyl-, N-octyl- and N-phenylimidazole, particularly suitable diamines are N,N'-di-tert-butylethylenediamine, particularly suitable secondary monoamines are di-n-butylamine and di-n-propylamine, particularly suitable primary amines are ethylhexylamine, octylamine and decylamine, and particularly suitable tertiary amines are butyldimethylamine and n-propyldimethylamine.

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