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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.

    1,4-of 1,5-dichlorohydrocarbons - continuous prepn using simple appts
    3.
    发明专利
    1,4-of 1,5-dichlorohydrocarbons - continuous prepn using simple appts 未知

    公开(公告)号：DE2149822A1

    公开(公告)日：1973-06-14

    申请号：DE2149822

    申请日：1971-10-06

    Applicant: BASF AG

    Inventor： SCHOENLEBEN WILLIBALD DR ,  DATOW JOACHIM DR ,  HOFFMANN HERWIG DR ,  WINDERL SIEGFRIED DR

    IPC: C07C17/093 ,  C07C17/16

    Abstract: Continuous prepn. of 1,4- or 1,5-dichlorinated hydrocarbons by reaction of a liq. mixt. of 1,4- or 1,5-diols and/or corresp. cyclic ethers and HCl, opt. in the presence of a catalyst. The vapour of the boiling reaction mixt. is fractionated in such a way that a liq. mixt. of the dichloro cpd. and H2O is obtd. on one hand and a gaseous mixt. of HCl, cyclic ether and possibly remaining dichloro cpd. on the other; after condensing the gaseous mixt. is led back to the reaction mixt. The process is esp. used for prepn, of 1,4-dichlorobutane and 1,5-dichloropentene. Only simple appts. is required and approx. normal press.

    2-chloro-3-butyne production - from 1-butyn-3-ol
    8.
    发明专利
    2-chloro-3-butyne production - from 1-butyn-3-ol 未知

    公开(公告)号：DE2057955A1

    公开(公告)日：1972-06-08

    申请号：DE2057955

    申请日：1970-11-25

    Applicant: BASF AG

    Inventor： HERTL OTTO DR ,  SCHLECHT HELMUT DR-ING ,  DATOW JOACHIM DR

    IPC: C07C17/16 ,  C07C17/363 ,  C07C68/02

    Abstract: 2-Chloro-3-butyne, which is of use as an intermediate for synthetic resins, plastics and plant-protection agents (e.g. herbicides), is produced in improved yields and purity by reacting 1-butyn-3-ol with COCl2 in the presence of N,N-dialkyl carboxylic acid amide catalysts (pref. dimethylformamide), the reaction being carried out in two stages in the first of which 1-butyn-3-ol and COCl2 are reacted at 25 degrees C to form 1-butyn-3-yl chloroformate and in the second of which the reaction mixt. is heated at >60 degrees C to form the desired 2-chloro-3-butyne.

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