This invention provides an improved gas phase feed process using heterogeneous catalysis for the selective epoxidation of non-allylic olefins wherein the epoxidation is carried out in the presence of branched-chain alkane or cyclic aliphatic hydrocarbons with high autoignition temperatures and high Research Octane Numbers. The hydrocarbons useful in the present invention possess higher heat capacities as compared to other non-oxidizable materials, e.g., nitrogen, argon, helium, and other straight-chain hydrocarbons, e.g., methane, ethane, and n-butane, as well as smaller flammability (cool flame and explosive) regions than the above-stated hydrocarbons typically used as diluents or ballast gases in olefin epoxidations. The process is particularly useful for the continuous preparation of 3,4-epoxy-1-butene from 1,3-butadiene.

Esta invenção fornece um catalysis heterogêneo usando-se process melhorado da alimentação da fase de gás para o epoxidation seletivo de olefins non-allylic wherein o epoxidation é realizado na presença do alkane branched-chain ou de hidrocarbonetos aliphatic cíclicos com altas temperaturas do autoignition e números de octano elevados da pesquisa. Os hidrocarbonetos úteis na invenção atual possuem umas capacidades de calor mais elevadas em comparação a outros materiais non-non-oxidizable, por exemplo, nitrogênio, argônio, helium, e outros hidrocarbonetos straight-chain, por exemplo, methane, ethane, e n-butano, assim como regiões menores do flammability (flama e explosivo frescos) do que os hidrocarbonetos acima-indicados usados tipicamente como diluents ou gáses do reator em epoxidations do olefin. O processo é particularmente útil para a preparação contínua de 3,4-epoxy-1-butene de 1,3-butadiene.

 
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