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近年来，二甲醚作为重要化工原料及清洁燃料，进一步法合成技术发展迅速。与两步法相比，二甲醚一步法生产成本的降低为其使用范围的扩大奠定了基础。本文阐述了二甲醚一步法全两步法合成在热力学上的优势来源于多个化学反应同时进行所产生的协同效应。热力学上的优质直接导致了原料合成气转化率的提高。综述了两种一步法二甲醚合成技术（浆床合成技术和固定床合成技术）的发展情况。对以NKK和Haldor Topsφe A/S两公司为代表的这两种技术的进展及工业化进程进行了描述，还就这两种技术对合成气组成及造气工艺的不同要求进行了初步探讨。针对不同造气工艺的不同适应性，最后对不同市场需求情况下所宜采用的二甲醚生产一步法工业化方案进行了评述。

PROGRESS IN DIMETHYL ETHER SYNTHESIS TECHNIQUE BY ONE-STEP METHOD

As an important raw material for chemical industry and clean fuel,the dimethyl ether (DME) synthesis technique by one-step method has rapidly developed in recent years. As compared with two-step method, the production cost of DME by one-step method is low, which lays a foundation for extending its application scope. This paper expounds that the thermodynamic advantages of DME synthesized by one-step method as compared with that by two-step method stem from the coordinate effect engendered due to the many chemical reactions occurred at the same time. The thermodynamic advantages directly lead to raise of the synthetic gas convension rate. In this paper, the developing situation of two DME synthesis techniques by one-step method (slurry bed and fixed bed synthesis techniques)is summarized, the progress in these two techniques represented by NKK and Haldor Tops φe A/S companies and their industrialization course are described and the different requirements for these two techniques to the synthetic gas composition and gasproducing technology are preliminary discussed. Finally, in view of the different adaptabilities of the different gas-producing technologies, the suitable-to-adopt one-step method industrialization plan for producing DME is appraised in this paper in the light of the different requirements of the market.