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    Improvements in or relating to organo-lead compounds
    3.
    发明专利
    Improvements in or relating to organo-lead compounds 未知

    公开(公告)号：GB719913A

    公开(公告)日：1954-12-08

    申请号：GB2945452

    申请日：1952-11-21

    Applicant: ETHYL CORP

    Inventor： KOLKA ALFRED JEROME ,  KROHN IVAR TRYGVE

    IPC: C07F7/24

    Abstract: Tetrahydrocarbon lead compounds are prepared by dissolving lead and an alkali or alkaline earth metal in liquid ammonia and reacting the resulting solution with an alkylating and/or arylating agent having a hydrocarbon group attached to a negative radical which reacts with the alkali or alkaline earth metal to form a salt. The lead may be in the form of free metallic lead or a lead alloy such as sodium-lead, potassium-lead and calcium-lead alloys. Suitable alkylating and arylating agents are the alkyl and aryl halides, preferably the iodides, bromides and chlorides, the dialkyl sulphates and the trialkyl phosphates containing ethyl, propyl, butyl or phenyl radicals. Tetrahydrocarbon lead compounds which may be prepared are tetramethyl, tetraethyl, tetrapropyl, dimethyldiethyl, methyltriethyl, tetraphenyl and diethyldiphenyl lead. The preferred reaction temperature is between -35 DEG and 60 DEG C., and the preferred reaction time is between 1 and 60 minutes. The amount of liquid ammonia used may be between 1 and 1000 parts-preferably between 2 and 25 parts-to 1 part of metal used by weight. In the examples tetraethyl lead is prepared using NaPb alloy.

    Improvements in or relating to process for making fluorochloronitroaromatic compounds
    10.
    发明专利
    Improvements in or relating to process for making fluorochloronitroaromatic compounds 未知

    公开(公告)号：GB687962A

    公开(公告)日：1953-02-25

    申请号：GB1732850

    申请日：1950-07-11

    Applicant: ETHYL CORP

    Inventor： KOLKA ALFRED JEROME ,  LIGETT WALDO BUFORD

    IPC: C07C201/14 ,  C07C205/12

    Abstract: The invention comprises chloro- and/or bromo-fluoronitroaromatic compounds having an aromatic nucleus of the benzene series, substituted by chloro and/or bromo, fluoro and nitro groups, the total number of such substituents being at least four, and comprises also the process for the preparation of the compounds by thermal decomposition of the diazonium fluoborate or fluoride, brominating or chlorinating the fluorinated nucleus and nitrating the product. Suitably the product of chlorination or bromination is fractionated and a desired fraction chosen for nitration. Many chloro or bromo, fluoronitro derivatives of benzene, naphthalene, anthracene, phenanthrene and chrysene are specified. In an example aniline is diazotized in fluoroboric acid solution to give benzene diazonium fluoroborate which is decomposed to fluorobenzene, chlorinated and the trichlorofluorobenzene fraction nitrated to trichlorofluorodinitrobenzene.ALSO:Fungicidal compositions comprise chloroand/or bromo-fluoronitroaromatic compounds having an aromatic nucleus of the benzene series (e.g. benzene, naphthalene, anthracene, chrysene, phenanthrene) substituted with chloro and/or bromo fluoro and nitro groups the total number of such substituent groups being at least four (see Group IV (b) for preparation) in admixture with a carrier. Specified carriers are carbon, silica gel, diatomaceous earth, fuller's earth, talc and sulphur and liquid diluents such as ketones, hydrocarbon oils (e.g. kerosene) or halogenated hydrocarbons. Tests are described in which the active fungicides are trichlorofluorodinitrobenzene, dichlorofluorodinitrobenzene and chlorodifluorodinitrobenzene.

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