PRODUCTION OF PHTHALIC ANHYDRIDE BY GAS PHASE OXIDATION OF O-XYLOL
    5.
    发明申请
    PRODUCTION OF PHTHALIC ANHYDRIDE BY GAS PHASE OXIDATION OF O-XYLOL 审中-公开
    通过邻二甲苯的气相氧化制备邻苯二甲酸酐

    公开(公告)号:WO2007135104A8

    公开(公告)日:2008-06-12

    申请号:PCT/EP2007054841

    申请日:2007-05-18

    CPC classification number: C07D307/89 C07C51/265 C07C63/16

    Abstract: The invention relates to a method for producing phthalic anhydride by catalytic gas phase oxidation of o-xylol. According to said method, a gaseous mixture of o-xylol and an oxygen-containing gas is guided through at least two reaction zones in a main reactor, the temperature of said reaction zones being adjustable independently of each other, and is reacted to give a gaseous intermediate reaction product which contains unreacted o-xylol, phthalic anhydride reaction products with a lower oxidation state and phthalic anhydride, and the intermediate reaction product is introduced into a secondary reactor. The temperature in the reaction zones in the primary reactor is controlled in such a manner that the concentration of the unreacted o-xylol in the intermediate reaction product is at least 0.5% by weight. The method according to the invention allows an increase in total yield of phthalic anhydride without any or without substantial decrease in product quality.

    Abstract translation: 用于通过邻二甲苯,其中其将通过至少两个反应区,其是独立温度可控地转发所描述的,含有氧的气体邻二甲苯的气体混合物,并在主反应器的催化气相氧化制备邻苯二甲酸酐,于气态中间反应产物的方法 反应含有未反应的邻二甲苯,邻苯二甲酸酐欠氧化产品和邻苯二甲酸酐,以及将所述中间反应产物分离成二级反应器,其特征在于,它调节在主反应器中的反应区的温度,即未转化的邻二甲苯中的中间反应产物中的浓度为至少0 ,5重量%(重量)。 该方法允许增加邻苯二甲酸酐的总产没有或没有在产品质量上显著恶化。

    OBTENCION DE ANHIDRIDO DEL ACIDO FTALICO POR OXIDACION EN FASE GASEOSA DE O-XILENO.

    公开(公告)号:ES2361202T3

    公开(公告)日:2011-06-14

    申请号:ES07729285

    申请日:2007-05-18

    Applicant: BASF SE

    Abstract: Procedimiento para la obtención de anhídrido del ácido ftálico por medio de la oxidación catalítica en fase gaseosa de o-xileno, según el cual se conduce una mezcla gaseosa de o-xileno y de un gas que contiene oxígeno en un reactor principal a través de, al menos, dos zonas de reacción, que pueden ser termostatadas independientemente entre sí y se transforma en un producto intermedio de la reacción gaseosa, que contiene oxileno no convertido, productos de la suboxidación del anhídrido del ácido ftálico y anhídrido del ácido ftálico y el producto intermedio de la reacción se alimenta a un reactor secundario, caracterizado porque la temperatura de las zonas de reacción del reactor principal se regulan de tal manera, que la concentración en o-xileno no convertido en el producto intermedio de la reacción sea, al menos, de un 0,5 % en peso, referido al peso de los componentes orgánicos en el producto intermedio de la reacción.

    8.
    发明专利
    未知

    公开(公告)号:AT501132T

    公开(公告)日:2011-03-15

    申请号:AT07729285

    申请日:2007-05-18

    Applicant: BASF SE

    Abstract: A process is described for preparing phthalic anhydride by catalytic gas phase oxidation of o-xylene, in, in a main reactor, a gaseous mixture of o-xylene and an oxygenous gas is passed through at least two reaction zones whose temperature can be controlled independently, and converted to a gaseous intermediate reaction product which comprises unconverted o-xylene, phthalic anhydride underoxidation products and phthalic anhydride, and the intermediate reaction product is introduced into a postreactor, wherein the temperature of the reaction zones in the main reactor is regulated in such a way that the concentration of unconverted o-xylene in the intermediate reaction product is at least 0.5% by weight. The process allows an increase in the overall yield of phthalic anhydride without or without significant deterioration in the product quality.

    9.
    发明专利
    未知

    公开(公告)号:DE502007003524D1

    公开(公告)日:2010-06-02

    申请号:DE502007003524

    申请日:2007-05-18

    Applicant: BASF SE

    Abstract: A process is described for preparing phthalic anhydride by catalytic gas phase oxidation of o-xylene, in which a gaseous mixture of o-xylene and an oxygenous gas is converted in a main reactor to a gaseous intermediate reaction product which comprises unconverted o-xylene, phthalic anhydride underoxidation products and phthalic anhydride, the heat of reaction which arises in the main reactor being removed at least partly by indirect cooling with a heat carrier medium, and the intermediate reaction product being introduced into a postreactor. The concentration of unconverted o-xylene in the intermediate reaction product is at least 1% by weight, and the sum of the concentrations of phthalic anhydride underoxidation products in the intermediate reaction product is at least 0.5% by weight. The process allows an increase in the overall yield of phthalic anhydride without or without significant deterioration in the product quality.

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