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Method for preparing polylol with soybean oil

A technology for polyol and soybean oil, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of high requirements on reaction conditions and unsuitable for industrial production.

Inactive Publication Date: 2008-06-11
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalysts in the hydroformylation method are noble metals, and the reaction conditions are high, which is not suitable for industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Mix 40ml of soybean oil (the iodine value is preferably between 80-240), 12.5ml of formic acid, 5g of cation exchange resin (such as 7321 type strong acid cation exchange resin, domestic, can be reused, converted to hydrogen before use) type) into a 250mL three-necked flask with a stirrer, the three-necked flask was transferred to a water bath, and the temperature was controlled to be 50°C, and then 22.5ml of hydrogen peroxide was added dropwise. In the process of adding hydrogen peroxide dropwise, the dropping rate must be controlled so that the heat released by the reaction of hydrogen peroxide and formic acid will not increase the temperature of the material by more than 2°C. After reacting for 6 hours, filter, recover and regenerate the cation exchange resin, ready for next use. Separate the liquid with a separatory funnel to separate the oily phase. Then, 60mL of methanol, 10ml of water, 2ml of fluoboric acid (40% aqueous solution) were added to the epoxidized soy...

Embodiment 2

[0013] Mix 40ml of soybean oil (the iodine value is preferably between 80-240), 10.5ml of formic acid, 5g of cationic resin (such as 7321 strong acidic cationic exchange resin, domestic, can be used repeatedly, and has been converted into hydrogen form before use) ) into a 250mL three-necked flask with a stirrer, the three-necked flask was transferred to a water bath, and the temperature was controlled to be 55°C, and then 22.5ml of hydrogen peroxide was added dropwise. In the process of adding hydrogen peroxide dropwise, the dropping rate must be controlled so that the heat released by the reaction of hydrogen peroxide and formic acid will not increase the temperature of the material by more than 2°C. After reacting for 6 hours, filter, recover and regenerate the cation exchange resin, ready for next use. Separate the liquid with a separatory funnel to separate the oily phase. Then, 60mL of methanol, 10ml of water, and 2ml of fluoroboric acid (88% aqueous solution) were adde...

Embodiment 3

[0015] Add 40ml of soybean oil (the iodine value is preferably between 80-240), 12.5ml formic acid, and 0.1ml concentrated sulfuric acid into a 250mL three-necked flask with a stirrer, and transfer this three-necked flask to a water bath. And control the temperature to 55°C, then add 20ml of hydrogen peroxide dropwise. In the process of adding hydrogen peroxide dropwise, the dropping rate must be controlled so that the heat released by the reaction of hydrogen peroxide and formic acid will not increase the temperature of the material by more than 2°C. After the reaction was carried out for 6 hours, the liquid was separated with a separating funnel, and the oil phase was separated. Then, 60mL of methanol, 10ml of water, 2ml of fluoboric acid (40% aqueous solution) were added to the epoxidized soybean oil within 15 minutes, the temperature was raised, reacted at 50° C. for 2 hours, and then added ammonia water for neutralization. Separation was carried out with a separatory fun...

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PUM

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Abstract

The invention relates to a method for preparing polyol which is epoxidised by soybean oil and further preparing polyurethane foam plastic, wherein the preparation technical of polyol comprises the procedures as follows: first, preparing epoxy soybean oil by peroxy acid home position generation method of soybean oil, the epoxy value is between 2.0 and 7.0, and then preparing soybean oil polyol by catalyzing epoxy soybean oil under acid or alkaline. The hydroxyl value of polyol is between 100 and 700 mgKOH / g and the viscosity can be controlled by changing distilling temperature. The polyol replaces polyether or polyester polyol to synthesize polyurethane foam plastic which can be applied in the insulation material and the like. The invention is characterized in adopting acid or alkaline as catalyst to catalyze ring-opening reaction and obtaining polyol of different viscosities through different distilling temperature.

Description

technical field [0001] The invention relates to a preparation process of soybean oil polyol. This polyol can partially or completely replace polyether or polyester polyol to synthesize polyurethane foam plastics. Background technique [0002] With the increasing crisis of natural non-renewable resources such as oil and the greenhouse effect. Based on considerations of economy, environmental friendliness and sustainability, people pay more attention to bio-renewable resources. In the polyurethane industry, the preparation of soybean oil polyols instead of petroleum-based polyols for the synthesis of polyurethanes has attracted more and more attention. [0003] At present, there are four common methods for preparing soybean oil-based polyols in the report: (1) transesterification method, which mainly uses glyceride in soybean oil with glycerol, pentaerythritol, glucoside, sucrose and other polyols and transesterification reaction to prepare polyols; (2) ozonation method, wh...

Claims

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Application Information

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IPC IPC(8): C07C69/675C07C67/31C08G18/36
Inventor 李渊王丽军窦国胜
Owner TIANJIN POLYTECHNIC UNIV
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