Dehydration technique and dehydration device for synthesizing poly-methoxy-dimethyl ether
A technology of polyoxymethylene dimethyl ether and process method, which is applied in the direction of chemical instruments and methods, preparation of organic compounds, chemical recovery, etc., can solve problems such as complex process and large waste, and reduce energy consumption, pressure and The effect of temperature reduction
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[0021] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.
[0022] The dehydration process for synthesizing polyoxymethylene dimethyl ether provided by the present invention, at first reduces the bring-in of moisture from the raw material, selects the formaldehyde gas within 0.1% of water content and dissolves in high-concentration methylal (99%- 99.5%) to form a methylal solution of formaldehyde, so that the reactant reacts in the liquid phase. Compared with paraformaldehyde and paraformaldehyde, the reaction conditions are reduc...
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