Process for producing 2-pyrrolidinones
    5.
    发明授权
    Process for producing 2-pyrrolidinones 失效
    生产2-吡咯烷酮的方法

    公开(公告)号:US3567736A

    公开(公告)日:1971-03-02

    申请号:US3567736D

    申请日:1967-12-18

    Applicant: TEXACO INC

    CPC classification number: C07D201/08

    Abstract: A METHOD FOR PREPARING A 2-PYRROLIDINONE BY CONTACTING A DINITROALCOHOL HAVING AT LEAST 5 CARBON ATOMS CORRESPONDING TO THE FORMULA:

    R-C(-R1)(-NO2)-C(-R2)(-R3)-C(-R4)(-R5)-CH(-OH)-

    C(-R6)(-NO2)-R7

    WITH AN ACIDIC OXIDIZING AGENT AT A PH NOT EXCEEDING 4 THEREBY FORMING A 4-NITROALKANOIC ACID OF THE FORMULA:

    R-C(-R1)(-NO2)-C(-R2)(-R3)-C(-R4)(-R5)-COOH

    AND THEREAFTER HYDROGENATING THE 4-NITROALKANOIC ACID IN AN ALCOHOLIC MEDIUM IN THE PRESENCE OF A MINOR AMOUNT OF A MINERAL ACID AND A HYDROGENATION CATALYST PREFERABLY SELECTED FROM THE GROUPS OF PLATINUM METALS AT TEMPERATURES RANGING FROM ABOUT 20 TO 200*C. AND UNDER HYDROGEN PRESSURES OF FROM 1 TO 100 ATMOSPHERES. THE 2-PYRROLIDINONES CONTEMPLATED CORRESPOND TO THE FORMULA:

    2-R,2-R1,3-R2,3-R3,4-R4,4-R5-PYRROLIDIN-5-ONE

    AND ARE USEFUL AS SOLVENTS FOR POLYMERS, INSECTICIDES AND PETROLEUM PROCESSING AND SEPARATION; AS PLASTICIZERS FOR ACRYLIC POLYMERS AND COPOLYMERS; AND AS DECOLORIZING AGENTS.

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