Method for preparing polyether polyol by catalytic solvothermal liquefaction of straws

A polyol and catalyst technology, applied in the field of corn stalk powder catalytic liquefaction to prepare polyether polyol, can solve the problems of catalyst post-treatment equipment corrosion, catalyst separation and reuse, etc., to avoid corrosion and side reactions, and reduce operating costs , the effect of simple operation

Inactive Publication Date: 2020-07-31
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the liquefaction process using liquid mineral acids such as sulfuric acid as a catalyst has problems such as catalyst post-treatment and equipment corrosion, and the liquefaction process using solid acid as a catalyst has problems of catalyst separation and reuse.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 5.0g of corn stalk powder to a 150ml hydrothermal reactor, then add 30.0g of starch liquefaction, 1.75g ​​of sulfamic acid and 0.175g of sodium polyaspartate, mix well, and put the reactor into a In the oven of the device, react at 140°C for 5 hours, take out the reaction kettle, and after cooling down, distill the product to remove water under reduced pressure to obtain polyether polyol. The liquefaction rate of straw powder is determined to be 65.2%, and the hydroxyl value is 383.7mgKOH / g, viscosity 420.3cps.

Embodiment 2

[0019] Add 5.0g of wheat straw powder to a 150ml hydrothermal reactor, then add 35.0g of starch liquefaction, 1.75g ​​of isethionic acid and 0.6g of sodium lignosulfonate, mix well, put the reactor into an oven, React at 160°C for 5 hours, take out the reactor, and distill the product under reduced pressure to remove water after cooling down to obtain polyether polyol. The liquefaction rate of wheat straw is 52.6% and the hydroxyl value is 460.9 mgKOH / g.

Embodiment 3

[0021] Add 5.0g of straw powder to a 150ml hydrothermal reactor, then add 30.0g of starch liquefaction, 1.75g ​​of isethionic acid and 0.3g of sodium dodecylbenzenesulfonate, mix well, and put the reactor into an oven , reacted at 160°C for 5 hours, took out the reactor, and after cooling down, distilled the product to remove water under reduced pressure to obtain polyether polyol. The liquefaction rate of rice straw powder was determined to be 65.6%, and the hydroxyl value was 454.0 mgKOH / g.

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PUM

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Abstract

The invention provides a preparation method of biomass-based polyether polyol, and belongs to the technical fields of chemical new materials and high-quality utilization of biomass. Starch liquefaction products, straw powder and a dispersing agent are used as raw materials, a solvothermal reaction is catalyzed to prepare polyether polyol, and under a proper liquefaction reaction condition, the liquefaction rate of straws reaches 65% at most. The hydroxyl value of the obtained polyether polyol is 426.0 mg KOH/g, and the viscosity of the obtained polyether polyol is 430.5 mPa.s. The method is simple in equipment and operation and wide in raw material source, and the obtained polyether polyol is suitable for being used as a raw material for preparing an environment-friendly rigid polyurethanethermal insulation material.

Description

technical field [0001] The invention relates to the technical field of new chemical materials and high-quality biomass utilization, in particular to a method for preparing polyether polyols by catalytic liquefaction of corn stalk powder. Background technique [0002] Polyurethane (PU) is one of the most widely used polymer materials at present. It is a body-shaped polymer formed by the polycondensation reaction of isocyanate and polyol. Since the two main raw materials used come from petroleum, limited by the non-renewable nature of petroleum sources and the non-environmental protection of products, polyurethane production raw materials derived from renewable resources have received widespread attention worldwide. Biodegradable biomass as a raw material for the production of polyurethane has become a research hotspot and the attention of the industry. Corn straw powder has all the characteristics of renewable resources, and its composition is relatively simple, and the molec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/34C08G18/76C08G18/48C08G101/00
CPCC08G18/48C08G18/7671C08G65/34C08G2110/0025C08G2110/0083
Inventor 张龙戚丁元王成仟黄一迅
Owner CHANGCHUN UNIV OF TECH
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