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Organism-based polyol preparing by epoxy rapeseed oil

A bio-based polyol and epoxidized rapeseed oil technology, which is applied in the preparation of ester groups and hydroxyl groups, organic chemistry, etc., can solve problems that have not yet been discovered, and achieve strong functionality, reduced dependence, and low environmental pollution. Effect

Inactive Publication Date: 2007-02-07
HONGBAOLI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the epoxy rapeseed oil prepared from renewable rapeseed oil is studied as a plasticizer, and the bio-based polyol prepared from epoxy rapeseed oil is used in the polyurethane industry, and no reports on this aspect have been found

Method used

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  • Organism-based polyol preparing by epoxy rapeseed oil
  • Organism-based polyol preparing by epoxy rapeseed oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add 1000g of epoxy rapeseed oil into a 2L glass kettle, then add 420g of diethylene glycol and 4.9g of potassium hydroxide, stir and raise the temperature, control the reaction temperature at 65-200°C, and the reaction time is 1-12 hours. Then add 211g of glycerol and 4g of potassium glycerol at a temperature of 65-100°C, control the temperature at 70-240°C, carry out alcoholysis reaction for 3-6 hours, and then keep it for 3-7 hours under a vacuum of 100-750kPa. Hour, back sampling analysis, the crude product of hydroxyl value 476mgKOH / g. Afterwards, it is refined, and the specific method is as follows: add 18g of 50% phosphoric acid for neutralization for 15 minutes, add 3g of magnesium silicate for adsorption, and then dehydrate for 60 minutes at a vacuum degree of 100-750KPa and a temperature of 80-120°C. , to obtain product 1540g refined bio-based polyol.

Embodiment 2

[0044] Add 1000g of epoxy rapeseed oil into a 2L glass kettle, then add 332g of propylene glycol and 5g of potassium hydroxide, stir and raise the temperature, control the reaction temperature at 65-200°C, and the reaction time is 1-12 hours. Then at a temperature of 65-100°C, add 308g of trimethylolpropane, 1.1g of potassium hydroxide, control the temperature at 70-240°C, carry out alcoholysis reaction for 3-6 hours, and then keep it under the condition of vacuum degree of 100-750kPa After 3 to 7 hours, after sampling and analysis, the crude product with a hydroxyl value of 470mgKOH / g. Afterwards, it is refined, and the specific method is as follows: add 20g of 50% phosphoric acid for neutralization for 15 minutes, add 3.2g of magnesium silicate for adsorption, and then dehydrate for 60 minutes at a vacuum degree of 100-750KPa and a temperature of 80-120°C, and filter Finally, the refined bio-based polyol of product 1550g was obtained.

Embodiment 3

[0046] Add 1000g of epoxy rapeseed oil into a 2L glass kettle, add 180g of ethanol, 38g of 10% potassium ethoxide, stir and heat up, control the reaction temperature at 65-200°C, and the reaction time is 1-12 hours. Then at a temperature of 65-100°C, add 440g of triisopropanolamine, 14g of 10% potassium ethoxide, control the temperature at 70-240°C, and carry out the alcoholysis reaction for 3-6 hours. Finally, the vacuum degree is 100 ~ 750kPaKeep it for 3-7 hours under the condition of lowering the temperature to 70-80°C for refining. The specific method is as follows: add 17g of 50% phosphoric acid for neutralization for 20 minutes, add 15g of active clay for adsorption, and then vacuum at 100-750KPa and 80 At ~120°C, dehydrate for 60 minutes and filter to obtain 1570 g of refined bio-based polyols with a hydroxyl value of 330 mgKOH / g.

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Abstract

The invention involves a bio-polyol prepared from epoxy rapeseed oil. The preparation method comprises: carrying out ring-opening reaction of epoxy rapeseed oil with an active hydrogen-bearing nucleophilic reagent at the presence of catalyst to obtain the mixed hydroxyl fatty acid triglyceride, and adding alcoholysis agent of alcohols or alkanolamine and heating for alcoholysis reaction to obtain mixed hydroxyl fatty acid monoester, i.e. biological-based polyol. The invention has the advantages of epoxy rapeseed oil being cheap and easy to get or self-design, reduction of dependence on petrochemical products, strong functions and high adjustability, and production of different functionality and pre-designed hydroxyl values of the bio-polyol according to requirements.

Description

technical field [0001] The invention relates to a method for preparing bio-based polyols by using epoxidized rapeseed oil, which is through the ring-opening of epoxy bonds in epoxidized rapeseed oil, and the transesterification of acyl groups and alcohol groups in glycerides to prepare mixed hydroxyl groups Fatty acid monoesters, referred to as bio-based polyols, belong to the technical field of organic synthesis. Background technique [0002] With the rapid development of the global economy, the global demand for all polyols is growing rapidly. There are three main types of polyols used in the past, one is polyol or organic amine as the initiator through the polymer with propylene oxide or ethylene oxide, called polyether polyol (abbreviated as PPG); the other is modified Graft polyether polyol is based on PPG, and then it is obtained by bulk polymerization reaction of vinyl monomer in polyol. It is called polymer polyol (abbreviated as POP), and it is often used in conjun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/33C07C67/03
Inventor 姚志洪孔新平文春俊蔡达红袁辉剑
Owner HONGBAOLI GRP CO LTD
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