Knobbe, Martens, Olson & Bear, LLP
Method for synthesizing polyoxymethylene dimethyl ethers catalyzed by an ionic liquid
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.
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
B C B C Y B B Y B B C
B01J C07C B01J C07C Y02P B01J B01J Y02P B01J B01J C07C
inventional inventional additional inventional additional inventional inventional additional inventional inventional inventional
Heyuan Jing Zhen Chungu
Song Chen Li Xia