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本发明公开了一种甲醇为初始反应原料连续制备聚甲氧基二甲醚的系统,主要包括甲醛制备单元、甲缩醛制备单元和聚甲氧基二甲醚制备单元:甲醛制备单元的主要作用是在催化剂的作用下,把原料甲醇氧化成甲醛溶液;甲缩醛制备单元的作用是固体酸性树脂催化剂的作用下,把部分甲醛溶液与甲醇反应,制备成甲缩醛;聚甲氧基二甲醚制备单元的作用是在离子液体催化剂的作用下,甲醇、甲缩醛分别与甲醛溶液的缩合反应,制备聚甲氧基二甲醚,反应产物经过分离提纯后,得到聚甲氧基二甲醚产品。
The invention discloses a system for continuous preparation of polymethoxy dimethyl ether by using methanol as an initial reaction raw material, and mainly comprises a formaldehyde preparation unit, a methylal preparation unit and a polymethoxy dimethyl ether preparation unit: the main components of the formaldehyde preparation unit are The role of the catalyst under the action of the raw material methanol oxidation of formaldehyde solution; methylal preparation unit role is the role of solid acid resin catalyst, part of the formaldehyde solution and methanol reaction to prepare methylal; polymethoxy Dimethyl ether preparation unit role is the role of the ionic liquid catalyst, methanol, methylal and formaldehyde solution condensation reaction, the preparation of polyoxymethylene dimethyl ether, after the reaction product was purified to give poly methoxy Dimethyl ether products.