Method for preparing lignin polyether polyols
A technology of lignin polyether and polyol, which is applied in the field of preparation of lignin polyether polyol, can solve problems such as difficult problems, inability to use, and unreasonable use of by-products, and achieve the effect of simple process, simple steps, and non-deformation
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 The specific implementation of the present invention will be described in further detail below in conjunction with the examples. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.
 A preparation method of lignin polyether polyol includes the following steps:
 1) Put the following parts by weight of raw materials into the reactor: alkali lignin 30-120, water 20-150, cellulase 0.5-10, sodium hydroxide 0.5-3, furfuryl alcohol 0.1-50, furfural 1-15; The reactor is heated to 30-65°C and stirred for 2-6 hours to cause the alkali lignin to undergo an enzymatic hydrolysis reaction to obtain an enzymatically hydrolyzed modified alkali lignin;
 2) Put the enzymatically hydrolyzed modified alkali lignin and liquid polyol, bimetallic catalyst, diethylene glycol, and glycerin obtained in step 1) into the reactor in the following parts by weight: Enzymatically hydrolyzed modified alkali lignin 60...
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