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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[0009] Below in conjunction with the examples, the specific implementation of the present invention will be further described in detail. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0010] A preparation method of lignin polyether polyol, comprising the following steps:
[0011] 1) Put the following raw materials into the reactor in parts by weight: 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, so that the alkali lignin undergoes an enzymatic hydrolysis reaction, and the enzymatically hydrolyzed modified alkali lignin is obtained;
[0012] 2) Put the enzymatically modified alkali lignin and liquid polyol, bimetallic catalyst, diethylene glycol, and glycerol prepared in step 1) into the reactor in the following parts by weight: enzymatically modified alkali ...
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