Light olefins synthesis from C1-C2 paraffins via oxychlorination processes  

作　　者：Anton SHALYGIN Evgenii PAUKSHTIS Evgenii KOVALYOV Bair BAL'ZHINIMAEV 

机构地区：[1]Boreskov Institute of Catalysis, Novosibirsk 630090, Russia

出　　处：《Frontiers of Chemical Science and Engineering》2013年第3期279-288,共10页化学科学与工程前沿（英文版）

摘　　要：A two-step process was employed to convert methane or ethane to light olefins via the formation of an intermediate monoalkyl halide. A novel K4RuOCll0/TiO2 catalyst was tested for the oxidative chlorination of methane and ethane. The catalyst had high selectivity for methyl and ethyl chlorides, 80% and 90%, respectively. During the oxychlorination of ethane at T〉~250~C, the formation of ethylene as a reaction product along with ethyl chloride was observed. In situ Fourier transform infrared studies showed that the key intermediate for monoalkyl chloride and ethylene formation is the alkoxy group. The reaction mechanism for the oxidative chlorina- tion of methane and ethane over the Ru-oxychloride catalyst was proposed. The novel fiber glass catalyst was also tested for the dehydrochlorination of alkyl chlorides to ethylene and propylene. Very high selectivities （up to 94%-98%） for ethylene and propylene formation as well as high stability were demonstrated.A two-step process was employed to convert methane or ethane to light olefins via the formation of an intermediate monoalkyl halide. A novel K4RuOCll0/TiO2 catalyst was tested for the oxidative chlorination of methane and ethane. The catalyst had high selectivity for methyl and ethyl chlorides, 80% and 90%, respectively. During the oxychlorination of ethane at T〉~250~C, the formation of ethylene as a reaction product along with ethyl chloride was observed. In situ Fourier transform infrared studies showed that the key intermediate for monoalkyl chloride and ethylene formation is the alkoxy group. The reaction mechanism for the oxidative chlorina- tion of methane and ethane over the Ru-oxychloride catalyst was proposed. The novel fiber glass catalyst was also tested for the dehydrochlorination of alkyl chlorides to ethylene and propylene. Very high selectivities （up to 94%-98%） for ethylene and propylene formation as well as high stability were demonstrated.

关 键 词：oxychlorination METHANE ETHANE light olefins ruthenium catalyst 

分 类 号：TQ222.423[化学工程—有机化工] TE626.88[石油与天然气工程—油气加工工程]