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    Improvements in the continuous production of hexachlorcyclopentadiene
    9.
    发明专利
    Improvements in the continuous production of hexachlorcyclopentadiene 未知

    公开(公告)号：GB846814A

    公开(公告)日：1960-08-31

    申请号：GB3702058

    申请日：1958-11-18

    Applicant: BASF AG

    Inventor： STEINHOFER ADOLF ,  MINSINGER MANFRED ,  FRIEDERICH HERBERT

    IPC: C07C17/10

    Abstract: Hexachlorocyclopentadiene is continuously prepared by reacting n-pentane, isopentane, cyclopentane, cyclopentene, cyclopentadiene or dicyclopentadiene or mixtures thereof, with chlorine in the p presence of a catalyst at 200 DEG C. or above, where the hydrocarbon vapour is continuously brought into a reaction zone heated to reaction temperature together with chlorine and, as catalyst, the vapour of at least one compound selected from oxides of nitrogen, nitrogen oxychlorides, aliphatic, alicyclic, aromatic or heterocylic amines, benzonitrile, monocarboxylic acid nitriles, unsubstituted or N-alkyl (1 to 4 carbon atoms) mono- or di-substituted monocarboxylic acid amides of alkane or alkene carboxylic acids with up to six carbon atoms in the alkane or alkene radical or cyclic N-unsubstituted or N-alkyl (1 to 4 carbon atoms), mono- or di-substituted carboxylic acid amides where the amide group forms part of a ring with 3 to 5 CH2 groups, so that the reactants and catalyst pass through the reaction zone in vapour phase, cooling the vapour leaving the zone and separating hexachlorocyclopentadiene from the condensate. The ratio of hydrocarbon to chlorine is preferably between 1:8 and 1:15 and the concentration of the nitrogenou s catalyst 0,2 to 10% by weight based on the hydrocarbon. The gaseous reaction mixture is preferably diluted with an inert gas, generally 5 to 50 mols of nitrogen per mole of chlorine. The reaction zone may be a vertical tube of steel, quartz or ceramic, heated externally e.g., electrically, with the gas stream entering at the top and leaving at the bottom. The catalyst, if solid or liquid at room temperature, may be introduced as such into the heated reaction zone or vaporised and mixed with one or both reactants. Many specific catalysts of each particular group are mentioned. In the examples the reactants, temperature, flow rates and content of the liquefied reaction product are tabulated. The examples illustrate the use as catalysts, of NO, N2O, NO2, NOCl, NO2Cl, triethylamine, n-butylamine, pyridine, pyrrolidine, N-butylpyrrolidine, dibutylamine, cyclohexylamine, diethylamine, 2-ethylhexylamine-1, propionitrile, acrylonitrile, benzonitrile, acetonitrile, N,N-dimethylformamide, N,N-dibutylformamide, N-methylformamide and N-methyl pyrrolidone. Specification 771,856 and U.S.A. Specification 2,658,085 are referred to.

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