聚甲氧基二甲醚合成技术的产业化进展

Development of the synthesis technology of polyoxymethylene dimethyl ethers

聚甲氧基二甲醚是煤化工行业中的一个新兴产品,该产品作为车用燃料调和组分具有诸多环保优势,已受到了国内外各行业的极大关注。本文综述了近年来聚甲氧基二甲醚合成技术的最新进展,根据聚甲氧基二甲醚反应原料的不同,分别简要介绍了以甲醇和三聚甲醛为原料、以甲缩醛和多聚甲醛为原料、以甲缩醛和甲醛气体为原料、以甲醇和甲醛为原料的4种主流技术的特色和国内产业化动态;对聚甲氧基二甲醚进入市场所需的支持性政策以及将面临来自于石油行业的抵制等问题进行了评述。最后对聚甲氧基二甲醚的下一步研究方向进行了展望,指出应该围绕"降低产品成本"来开展工作,重点解决以甲醇和甲醛为原料时反应体系中水的负面影响,同时还应该进一步优化催化剂的性能,控制产物分布,提升反应效率。

Polyoxymethylene dimethyl ethers is a new product of coal chemical industry. As a good additive for diesel fuel,it has advantage in environmental protection. The latest advances on the synthesis technology of polyoxymethylene dimethyl ethers were reviewed. According to the starting materials,the synthesis technologies can be divided into four types,using1 methanol and trioxane,2 methylal and paraformaldehyde, 3 methylal and formaldehyde gas, and 4 methanol and formaldehyde. The four mainstream techniques and the industrialization status were briefly introduced,respectively. Lacking of policy support and facing opposition from the oil industry are the two major issues for polyoxymethylene dimethyl ethers which should be solved before it enters the market. Finally,this article especially points out that we should put the emphasis of future research of polyoxymethylene dimethyl ethers on reducing the costs. What we need to do is to take effective measures to remove negative influence of water for the methanol and formaldehyde route. Meanwhile,the performance of the catalyst should be further optimized to control the proper distribution of products and improve the efficiency of the synthetic reaction.