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    Home > Chemicals Industry > Chemical Technology > Production principle and process flow of benzylidene acetone

    Production principle and process flow of benzylidene acetone

    • Last Update: 2021-08-10
    • Source: Internet
    • Author: User
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    Benzylideneacetone is also known as benzalacetone, 4-phenyl-3-buten-2-one (4-phenyl-3-buten-2-one), and its molecular formula is C 10 H 10 O, molecular weight is 146.
    19, structural formula is

    1.
    Product performance

    White or light yellow crystal; melting point 41.
    5℃, boiling point 261~262℃, 161℃(40×133.
    3Pa), 126~128℃(9×133.
    3Pa), relative density (d 15 15 ) 1.
    0377, refractive index (n D 45.
    9
    ) 1.
    5836; Slightly soluble in water, soluble in sulfuric acid , benzene, ethanol , and chloroform ; smells of coumarin, darkening when exposed to light; easy to decompose when heated for a long time
    .

    2.
    Production principle

    Under alkaline conditions, benzaldehyde and acetone undergo aldol condensation to obtain the product
    .

    3.
    Process flow

    4.
    Technical formula (kg/t)

    5.
    Main equipment

    Vacuum distillation tower, condensation reactor, fractionation tower, suction filter, crystallization pot, drying box
    .

    6.
    Production process

    The raw material benzaldehyde is distilled under reduced pressure
    .
    Then 84 parts of benzaldehyde, 127 parts of acetone and 80 parts of water were added to the condensation reaction kettle, cooled to 25°C, and 24 parts of 10% sodium hydroxide were slowly added


    .


    If it is refined by vacuum distillation, collect the fractions with a boiling range of 137~142℃/16×133.
    3Pa, cool and crystallize, and get the finished product
    .

    7.
    Laboratory preparation method

    Put 42g of benzaldehyde, 63.
    5g of acetone and 40mL of distilled water into the reaction flask, then add 12g of 10% sodium hydroxide solution, and the temperature is controlled at 25~31℃
    .
    After adding, continue to stir for 1h


    .


    8.
    Product Standard

    9.
    Product use

    Organic synthesis intermediate; can be used as anti-volatile agent of perfume; used as mordant and fixing agent in dyeing industry; used to prepare perfume or flavor enhancer, and prepare brightening agent for nickel plating and zinc plating
    .

    10.
    Security measures

    (1) This product is toxic and can irritate the skin and mucous membranes
    .
    The production equipment should be airtight, and the operator should wear protective gear to avoid contact with the skin


    .


    (2) Packed in iron drum lined with plastic bag
    .
    It is flammable and should be kept away from light


    .


     

     

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