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    Home > Chemicals Industry > Chemical Technology > Normal valent halogen compounds and the reactions they participate in (1)

    Normal valent halogen compounds and the reactions they participate in (1)

    • Last Update: 2022-01-20
    • Source: Internet
    • Author: User
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    The explosion hazard of normal-valent halogen compounds mainly comes from their oxidizing properties.


    (1) Oxygen acids and their salts: HXO, HXO 2 , HXO 3 , HXO 4 , the oxidation property comes from normal X (Cl, Br, I)


    (2) N- halosuccinimide and N- haloacetamide: NXS and NXA, X is CI, Br, the I


    (3) IBX: Its oxidizing property comes from high-valent iodine (+5 valence)


    (4) R 3 COX: For example, tert-butyl hypochlorite, its normal halogen is oxidizing


    (5) Interhalogen: the XY n- (n-= 1,3,5,7), in the heavy X-Y, from the positive valence oxidation X-


    1.


    Some normal valence halogen compounds are usually used in halogenation reaction, but they are also a kind of oxidant with explosion hazard


    The explosive sensitivity of R 3 COX is equivalent to that of peroxy alcohol R 3 COOH.


    Explosion accidents often occur with other types of normal halogen compounds


    2.


    (1) When storing, transporting, and sampling normal halogen compounds, they need to be low temperature, stable, and non-vibrating.


    (2) Add the normal-valent halogen compound solution dropwise as much as possible at a higher temperature.


    (3) The molar ratio of the normal-valent halogen compound does not need to be too large, and the excess normal-valent halogen compound in the reaction solution needs to be quenched thoroughly to ensure safety


    Three, examples

    example 1


    Application process: Add 1,3-dialkylbutylurea (6.


    Remarks: tert-butyl hypochlorite is very sensitive to heat.
    After the reaction, the excess tert-butyl hypochlorite should be quenched thoroughly with an aqueous sodium bisulfite solution
    .

     

     

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