专利详情

专利名称	Method for synthesizing polyoxymethylene dimethyl ethers catalyzed by an ionic liquid
申请号	US201113154359	专利类型	US
公开（公告）号	US8816131(B2)	公开（授权）日	2014.08.26
申请（专利权）人	中国科学院兰州化学物理研究所	发明（设计）人	Chen Jing;Song Heyuan;Xia Chungu;Li Zhen
主分类号	C07C41/58	IPC主分类号	C07C41/58;C07C41/50;C07C41/56
专利有效期	Method for synthesizing polyoxymethylene dimethyl ethers catalyzed by an ionic liquid 至Method for synthesizing polyoxymethylene dimethyl ethers catalyzed by an ionic liquid	法律状态
说明书摘要	It is related to a method for preparing polyoxymethylene dimethyl ethers by a continuous acetalation reaction of trioxymethylene and methanol or methylal catalyzed by an ionic liquid. The processing apparatus used in the method includes a reaction zone, a separation zone, a catalyst regeneration zone and a product dehydration zone. A manner of circulating tubular reaction is used, resulting in a high external heat exchange efficiency, a simple structure of design and a low investment. A film evaporator is used, realizing a rapid separation and recycling of the light component, with a high separation efficiency. The separation of the catalyst solution from the crude product is simple, thereby realizing the regeneration and recycling of the catalyst.