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    • 5. 发明申请
    • PROCESS OF PRODUCING OXALATE BY CO GAS PHASE METHOD
    • 通过气相法制备氧化铝的方法
    • US20130197265A1
    • 2013-08-01
    • US13641457
    • 2011-04-13
    • Juntao LiuFengxia SunJun Kuai
    • Juntao LiuFengxia SunJun Kuai
    • C07C67/18
    • C07C67/18B01J21/04B01J21/063B01J23/6562B01J23/8926B01J23/894B01J23/8946B01J23/8973C07C67/36C07C69/38
    • The present invention relates to a process of producing oxalate by CO gas phase method for chiefly solving the technical problem of the low utilization efficiency of nitrogen oxides or nitrous acid esters in the prior art. The present invention solves the problem in a better way by using the following steps including: a gas phase stream V containing NO and methanol and oxygen enter a supergravity rotating bed reactor II and are subjected to the oxidative esterification reaction to produce an effluent VI containing methyl nitrite; a methyl nitrite effluent VII obtained from separating said effluent VI together with a CO gas II enter a coupling reactor II and is contacted with a catalyst II to react to form a dimethyl oxalate effluent VIII and a gas phase effluent IX containing NO; the resultant dimethyl oxalate effluent VIII is separated to obtain a dimethyl oxalate product I; optionally, the gas phase effluent IX containing NO is returned to the step above so as to be mixed with the gas phase stream V containing NO for being recycled. Therefore, the process is applicable to the industrial production of oxalate by CO gas phase method.
    • 本发明涉及一种通过CO气相法生产草酸盐的方法,主要解决现有技术中氮氧化物或亚硝酸酯利用率低的技术问题。 本发明通过使用以下步骤更好地解决了该问题,包括:含有NO和甲醇和氧的气相流V进入超重力旋转床反应器II,并进行氧化酯化反应以产生含有甲基 亚硝酸盐 通过将CO 2气体II与所述流出物VI分离而获得的亚硝酸甲酯流出物VII进入偶联反应器II,并与催化剂II接触以进行反应以形成草酸二乙酯流出物VIII和含有NO的气相流出物IX; 将得到的草酸二甲酯流出物VIII分离得到草酸二甲酯产物I; 任选地,将含有NO的气相流出物IX返回到上述步骤,以与含有NO的气相物流V混合以进行再循环。 因此,该方法适用于CO气相法工业生产草酸盐。
    • 6. 发明授权
    • Process of producing oxalate by CO gas phase method
    • 通过CO气相法生产草酸盐的方法
    • US08871968B2
    • 2014-10-28
    • US13641457
    • 2011-04-13
    • Juntao LiuFengxia SunJun Kuai
    • Juntao LiuFengxia SunJun Kuai
    • C07C67/18C07C67/36B01J23/89B01J23/656B01J21/04B01J21/06
    • C07C67/18B01J21/04B01J21/063B01J23/6562B01J23/8926B01J23/894B01J23/8946B01J23/8973C07C67/36C07C69/38
    • The present invention relates to a process of producing oxalate by CO gas phase method for chiefly solving the technical problem of the low utilization efficiency of nitrogen oxides or nitrous acid esters in the prior art. The present invention solves the problem in a better way by using the following steps including: a gas phase stream V containing NO and methanol and oxygen enter a supergravity rotating bed reactor II and are subjected to the oxidative esterification reaction to produce an effluent VI containing methyl nitrite; a methyl nitrite effluent VII obtained from separating said effluent VI together with a CO gas II enter a coupling reactor II and is contacted with a catalyst II to react to form a dimethyl oxalate effluent VIII and a gas phase effluent IX containing NO; the resultant dimethyl oxalate effluent VIII is separated to obtain a dimethyl oxalate product I; optionally, the gas phase effluent IX containing NO is returned to the step above so as to be mixed with the gas phase stream V containing NO for being recycled. Therefore, the process is applicable to the industrial production of oxalate by CO gas phase method.
    • 本发明涉及一种通过CO气相法生产草酸盐的方法,主要解决现有技术中氮氧化物或亚硝酸酯利用率低的技术问题。 本发明通过使用以下步骤更好地解决了该问题,包括:含有NO和甲醇和氧的气相流V进入超重力旋转床反应器II,并进行氧化酯化反应以产生含有甲基 亚硝酸盐 通过将CO 2气体II与所述流出物VI分离而获得的亚硝酸甲酯流出物VII进入偶联反应器II,并与催化剂II接触以进行反应以形成草酸二乙酯流出物VIII和含有NO的气相流出物IX; 将得到的草酸二甲酯流出物VIII分离得到草酸二甲酯产物I; 任选地,将含有NO的气相流出物IX返回到上述步骤,以与含有NO的气相物流V混合以进行再循环。 因此,该方法适用于CO气相法工业生产草酸盐。