| 简介 |
PROBLEM TO BE SOLVED : To provide a method for producing propylene oxide, which minimizes the loss to a purge gas of propylene, and improves the yield in a propylene oxide production process.
SOLUTION : The method includes : (a) mixing propylene 102, high-purity oxygen 101 and balance gas 103 with recycle gas 110 to form a reaction gas mixture; (b) feeding the reaction mixture to a reactor 120 packed with a catalyst, and making an effluent 125 flow out from the reactor; (c) sending the effluent from the reactor to a recovery column 140 and forming a gas flow 148 having no propylene oxide; (d) sending the gas flow 148 having no propylene oxide to a diffusion column 130 to remove carbon dioxide 135; (e) purging 115 a part 138 of a gas flow having no carbon dioxide, and recycling a remaining gas flow as the recycle gas; (f) compressing the recycle gas again; and (g) regulating the flow amount of the purge gas to effectively reduce the concentration of argon.
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