Method for preparing polyether glycol with rape stalks as raw materials

A technology of polyether polyol and rape straw, which is applied in the field of polymer chemistry research, can solve the problems of complex operation, raw material modification, and many side reactions, and achieve the effect of simple process, mild conditions, and low cost

Inactive Publication Date: 2015-01-28
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Because the above-mentioned method for synthesizing polyether polyols based on vegetable oils such as soybean oil and rapeseed oil has technical problems such as complex operation, need to modify raw materials, and many side reacti

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  • Method for preparing polyether glycol with rape stalks as raw materials

Examples

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Example Embodiment

[0031] Example 1

[0032] A preparation method of polyether polyol using rape straw as a raw material, specifically comprising the following steps:

[0033] (1) Crush the rape stalks to 30 meshes, and bake them at 120°C for 1 hour to obtain straw powder;

[0034] (2) According to the ratio of liquefaction agent:catalyst mass ratio of 100:5, add liquefaction agent and catalyst to a four-necked flask equipped with mechanical stirrer, condenser and thermometer, and heat up to 100 while stirring. ℃, get the mixed solution;

[0035] The liquefaction agent is a mixture of glycerol and polyethylene glycol with a molecular weight of 400 g / mol in a mass ratio of 3:9;

[0036] The catalyst is sulfuric acid;

[0037] (3) Add the straw powder obtained in step (1) to the mixed liquid obtained in step (2), continue to heat up to 120°C for 120 min, and then naturally lower to room temperature to obtain a reaction liquid;

[0038] The amount of straw powder mentioned above is calculated by mass ratio...

Example Embodiment

[0044] Example 2

[0045] A preparation method of polyether polyol using rape straw as a raw material, specifically comprising the following steps:

[0046] (1) Crush the rape straw to 30 mesh, and bake it at 120℃ for 1 h to obtain straw powder;

[0047] (2) According to the ratio of liquefaction agent:catalyst mass ratio of 100:3, add liquefaction agent and catalyst into a four-necked flask equipped with mechanical stirrer, condenser and thermometer, and heat up to 140 while stirring. ℃, get the mixed solution;

[0048] The liquefaction agent is a mixture of glycerol and polyethylene glycol with a molecular weight of 400 g / mol in a mass ratio of 3:3;

[0049] The catalyst is sulfuric acid;

[0050] (3) Add the straw powder obtained in step (1) to the mixed solution obtained in step (2), continue to heat up to 160°C for 140 min, and then naturally lower to room temperature to obtain a reaction solution;

[0051] The above-mentioned amount of straw powder is calculated by mass ratio, s...

Example Embodiment

[0057] Example 3

[0058] A preparation method of polyether polyol using rape straw as a raw material, specifically comprising the following steps:

[0059] (1) Crush the rape straw to 30 mesh, and bake it at 120℃ for 1 h to obtain straw powder;

[0060] (2) According to the ratio of liquefaction agent:catalyst mass ratio of 100:1, add liquefaction agent and catalyst to a four-necked flask equipped with mechanical stirrer, condenser and thermometer, and heat up to 150 while stirring. ℃, get the mixed solution;

[0061] The liquefaction agent is a mixture of glycerol and polyethylene glycol with a molecular weight of 400 g / mol in a mass ratio of 3:1;

[0062] The catalyst is sulfuric acid;

[0063] (3) Add the straw powder obtained in step (1) to the mixed solution obtained in step (2), continue to raise the temperature to 170°C for 60 min, and then naturally lower to room temperature to obtain a reaction solution;

[0064] The amount of straw powder is calculated by mass ratio, straw ...

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Abstract

The invention discloses a method for preparing polyether glycol with rape stalks as raw materials. The method comprises the following steps: firstly, crushing and baking rape stalks to obtain stalk powder; adding a liquefying agent and a catalyst into a container in sequence according to a mass ratio of 100:(1-5); heating the liquefying agent and the catalyst to 100-150 DEG C while stirring the liquefying agent and the catalyst so as to obtain a mixed solution; adding the stalk powder to the mixed solution according to the fact that the mass ratio of the liquefying agent to the stalk powder is (4-8):1; continuing to heat obtained mixture to 120-170 DEG C, reacting for 60-180 min; naturally cooling to the room temperature; adjusting the pH value of a reaction liquid to 6-7; finally, carrying out filtering and reduced pressure distillation, so as to obtain the polyether glycol with the rape stalks as the raw materials. The polyether glycol with the rape stalks as the raw materials has infrared characteristic absorption peaks at two wave numbers of 1108-1112 cm<-1> and 3420-3440 cm<-1>, the hydroxyl value of the polyether glycol with the rape stalks as the raw material is 150-480 mg KOH/g, and the viscosity of the polyether glycol with the rape stalks as the raw material is 400-4500 mPa.s/25 DEG C.

Description

technical field [0001] The invention relates to a preparation method of polyether polyol with rape stalks as raw materials, belonging to the field of polymer chemistry research. Background technique [0002] Polyether polyol is one of the most important raw materials for the production of polyurethane materials. There are three main varieties: one is a polymer formed by ring-opening polymerization with propylene oxide or ethylene oxide with polyol or organic amine as the initiator, It is called polyether polyol (referred to as PPG for short); another kind of modified grafted polyether polyol is based on PPG, and then it is obtained by bulk polymerization reaction of vinyl monomer in polyol, called Polymer polyol (referred to as POP), often used in conjunction with PPG; the third is a polyol that is ring-opened and polymerized by tetrahydrofuran, which is generally composed of propylene oxide, ethylene oxide, propylene glycol, glycerol, sucrose and sorbitol as a starting mat...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G65/26C08G18/48
Inventor 贾润萍张进何新耀黄茂松
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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