Catalytic distillation technology of dimethyl ether

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Qilu completed 60-ton dimethyl ether pilot test February 26, 2009 Source: China Chemical Network Business News reported on February 26 that Qilu Petrochemical has initially completed a 60-ton/year catalytic distillation pilot test for dimethyl ether. All technical indicators of the device have met the design requirements. This marks a major breakthrough in the new dimethyl ether technology independently developed by Qilu Petrochemical Research Institute. 　　The catalytic distillation technology of Qilu Petrochemical Research Institute to produce dimethyl ether has the advantages of low reaction temperature, high conversion rate, good selectivity, low energy consumption and simple process. This technology not only avoids the pollution and corrosion of the liquid phase method, but also overcomes the shortcomings of high production costs of the gas phase method, and has strong overall competitiveness. Pilot test results show that the single-pass conversion rate of methanol is greater than 99%, and the purity of dimethyl ether is greater than 99.9%. The above is a quoted post: http://bbs.hcbbs.com/thread-400181-1-1.html content. I have objections: The synthesis of dimethyl ether from methanol is a chemical equilibrium. The single-pass conversion rate at this reaction temperature will not reach the so-called 99%. Since the process of producing dimethyl ether by catalytic distillation is a multi-pass (not single-pass) process of synthesis and distillation at the same time, it should not be a single-pass conversion rate. but: The industrialization consumption of this technology is definitely low and should have great economic prospects. Please discuss it.