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    Pure chloroformate prepn - from phosgene and alcohols reacted in presence of active carbon
    2.
    发明专利
    Pure chloroformate prepn - from phosgene and alcohols reacted in presence of active carbon 未知

    公开(公告)号：DE2161254A1

    公开(公告)日：1973-06-20

    申请号：DE2161254

    申请日：1971-12-10

    Applicant: BASF AG

    Inventor： HOFFMANN HERWIG DR ,  WENNER GOTTHILF DR ,  DATOW JOACHIM DR

    IPC: C07C68/02 ,  C07C69/96 ,  C07C69/62

    Abstract: Pure chloroformates having the general formula R-(OOCCl)n, (I), (where R is an aliphatic or cycloaliphatic gp. and n is 1 or 2) are prepd. by reaction of COCl2 with alcohols R(OH)n (II) effected in the presence of active C, used esp. in 0.05-3 (0.02-2) wt.% concn. w.r.t. (II). (I) are starting materials for prodn. of pesticides, plastics, dyes, synthetics. They should be highly pure for prodn. of peroxide polymsn. catalysts, e.g. of diisopropyl peroxy dicarbonate from isopropyl chloroformate; of transparent polycarbonates, e.g. derived from diglycol-bis-chloroformates with allyl alcohol; of therapeutic cpds., e.g. derived from Et chloroformate.

    Process for the continuous preparation of polyarylamines having methylene bridges
    5.
    发明专利
    Process for the continuous preparation of polyarylamines having methylene bridges 未知

    公开(公告)号：DE3225135A1

    公开(公告)日：1984-01-12

    申请号：DE3225135

    申请日：1982-07-06

    Applicant: BASF AG

    Inventor： WENNER GOTTHILF DR ,  HAHN EUGEN

    IPC: C08G12/08 ,  C08G18/32 ,  C07C87/50 ,  C07C85/24

    Abstract: The invention relates to a process for the continuous preparation of polyarylamines which have methylene bridges and a high content of diaminodiarylmethane isomers, by condensing primary arylamines with formaldehyde in the presence of acidic catalysts, where the components are preferably mixed in a stirred vessel at temperatures of up to 50 DEG C, and the reaction mixture is subsequently reacted in a tube reactor under plug flow conditions and a continuously increased temperature from 50 DEG C up to 90-100 DEG C.

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