Two stage butane haleic anhydride process
    1.
    发明授权
    Two stage butane haleic anhydride process 失效
    二级丁烷黑麦酸酐工艺

    公开(公告)号:US5360916A

    公开(公告)日:1994-11-01

    申请号:US152088

    申请日:1993-11-15

    CPC classification number: C07C51/215

    Abstract: Butane is oxidized with molecular oxygen in a dilute state by bringing a mixture of vaporized butane and air of controlled butane content into the presence of a contact vanadium-phosphorus-oxygen catalyst in a first oxidation zone under controlled pressure and temperature conditions, cooling the gaseous effluent from the first oxidation zone to a temperature in the range of 50.degree. to 300.degree. C., introducing a controlled amount of butane into the cooled gaseous effluent from the first oxidation zone, introducing said cooled butane-enriched stream into the second oxidation zone, and bringing the thus butane-enriched mixture into contact with a vanadium-phosphorus-oxygen catalyst disposed in the second zone.

    Abstract translation: 在受控的压力和温度条件下,通过使第一氧化区中的受控丁烷含量的蒸发的丁烷和空气的混合物存在于第一氧化区中的接触的钒 - 磷 - 氧催化剂的存在下,丁烷被氧化,冷却气态 从第一氧化区的流出物到50℃至300℃的温度,将受控量的丁烷引入来自第一氧化区的冷却的气态流出物中,将所述冷却的富含丁烷的物流引入第二氧化区 并使如此的丁烷富集的混合物与设置在第二区域中的钒 - 磷 - 氧催化剂接触。

    Steam regeneration of phosphorus treated vanadium-phosphorus-oxygen
catalysts
    2.
    发明授权
    Steam regeneration of phosphorus treated vanadium-phosphorus-oxygen catalysts 失效
    磷处理的钒 - 磷 - 氧催化剂的蒸汽再生

    公开(公告)号:US4515899A

    公开(公告)日:1985-05-07

    申请号:US561320

    申请日:1983-12-14

    CPC classification number: C07C51/215 B01J27/285 C07C51/252 Y02P20/584

    Abstract: The useful life of vanadium-phosphorus-oxygen (PVO) catalyst in fixed bed reactors can be substantially extended by treatment with a phosphorus compound followed by steam treatment. The PVO catalysts may be treated with steam after long periods (months) of only phosphorus compound treatment and the benefit of the present invention obtained or the phosphorus and steam treatments may be of only a few hours duration and sequential. In extending the useful life of the PVO catalyst according to the present invention, the temperature profile in the catalyst bed is restored to substantially the same profile as the fresh catalyst.

    Abstract translation: 固定床反应器中的钒 - 磷 - 氧(PVO)催化剂的使用寿命可以通过用磷化合物处理然后进行蒸汽处理而大大延长。 PVO催化剂可以在仅经过磷化合物处理的长时间(月)之后用蒸汽处理,并且所获得的本发明的益处或磷和蒸汽处理可能只有几个小时的持续时间和顺序。 在延长根据本发明的PVO催化剂的使用寿命期间,催化剂床中的温度曲线恢复到与新鲜催化剂基本相同的轮廓。

    Process for the production of maleic anhydride
    4.
    发明授权
    Process for the production of maleic anhydride 失效
    马来酸酐生产工艺

    公开(公告)号:US4596878A

    公开(公告)日:1986-06-24

    申请号:US645329

    申请日:1984-08-29

    CPC classification number: C07C51/215 B01J27/285 C07C51/252 Y02P20/584

    Abstract: The useful life of vanadium-phosphorus-oxygen (PVO) catalyst in fixed bed reactors can be substantially extended by treatment with a phosphorus compound followed by steam treatment. The PVO catalysts may be treated with steam after long periods (months) of only phosphorus compound treatment and the benefit of the present invention obtained or the phosphorus and steam treatments may be of only a few hours duration and sequential. In extending the useful life of the PVO catalyst according to the present invention, the temperature profile in the catalyst bed is restored to substantially the same profile as the fresh catalyst.

    Abstract translation: 固定床反应器中的钒 - 磷 - 氧(PVO)催化剂的使用寿命可以通过用磷化合物处理然后进行蒸汽处理而大大延长。 PVO催化剂可以在仅经过磷化合物处理的长时间(月)之后用蒸汽处理,并且所获得的本发明的益处或磷和蒸汽处理可能只有几个小时的持续时间和顺序。 在延长根据本发明的PVO催化剂的使用寿命期间,催化剂床中的温度曲线恢复到与新鲜催化剂基本相同的轮廓。

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