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Method for preparing vegetable-oil-based polyalcohol

A vegetable oil-based and polyol technology is applied in the field of preparation of vegetable oil-based polyols, which can solve the problems of complicated procedures, increased production costs, corrosion of equipment and the like, and achieves the effects of simple process, easy separation, and avoidance of easy decomposition.

Active Publication Date: 2014-08-27
云南神宇新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The above methods all need to epoxidize the vegetable oil first to prepare epoxy vegetable oil, and then further carry out hydroxylation of the epoxy vegetable oil, or use the epoxy vegetable oil as raw material to prepare vegetable oil-based polyols, which is not only complicated in process, but also increases cost of production
At the same time, the use of acid or alkaline catalysts severely corrodes the equipment

Method used

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  • Method for preparing vegetable-oil-based polyalcohol

Examples

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Effect test

preparation example Construction

[0023] Preparation process of Ti-Pd-MCM-41 catalyst:

[0024] Take hexadecyltrimethylammonium bromide and dissolve it in deionized water, heat and stir until the solution is clear to form a mother liquor, after the mother liquor is cooled to room temperature, add ammonia water to adjust the pH of the mother liquor to about 11 to obtain solution a. Dissolve butyl titanate in cumene hydroperoxide (mass fraction: 70%), slowly add it dropwise to solution a simultaneously with ethyl orthosilicate, stir at room temperature for 2 hours, carry out crystallization, suction filtration, After washing and drying, the temperature was programmed to rise to 550°C and calcined for 6 h to obtain the Ti-MCM-41 catalyst. The molar ratio of each component is ethyl orthosilicate: butyl titanate: NH 4 OH: cetyltrimethylammonium bromide: deionized water = 1: 0.15: 1.6: 0.15: 140.

[0025] Add concentrated hydrochloric acid to solid palladium chloride, then add ammonia water dropwise to the solutio...

Embodiment 1

[0028] Add 5 grams of soybean oil, 5 grams of methanol, and 0.25 grams of Ti-Pd-SBA-15 catalyst into the reactor, heat to 40 ° C, and 2 After replacing the air, add H with a volume ratio of 1:1 2 and O 2 Mix gas to 0.8MPa, then stop feeding H 2 and O 2 , keep the reaction time for 5 hours, after the reaction is completed, cool down to 10°C and discharge the material, perform suction filtration to remove the catalyst, then wash the liquid phase material with deionized water to neutrality, use anhydrous sodium sulfite to remove water, and remove the water at 50°C Distill under reduced pressure for 2 hours, remove the solvent, and cool down to room temperature to obtain soybean oil-based polyol. The hydroxyl value of the prepared soybean oil-based polyol was 152 mgKOH / g, and the product yield was 94%.

[0029]

Embodiment 2

[0031] Add 5 grams of castor oil, 5 grams of isopropanol, and 0.5 grams of Ti-Pd-SBA-15 catalyst into the reactor, heat to 70 ° C, and use O2 After replacing the air, add H with a volume ratio of 1:1 2 and O 2 Mix gas to 0.8MPa, then stop feeding H 2 and O 2 , keep the reaction time for 24 hours, after the reaction is completed, cool down to 10°C and discharge the material, perform suction filtration to remove the catalyst, then wash the liquid phase material with deionized water to neutrality, use anhydrous sodium sulfite to remove water, and remove the water at 50°C Distill under reduced pressure for 4 hours, remove the solvent, and cool down to room temperature to obtain soybean oil-based polyol. The hydroxyl value of the prepared soybean oil-based polyol was 297 mgKOH / g, and the product yield was 90%.

[0032]

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Abstract

The invention belongs to the technical field of organic synthesis and relates to a method for preparing vegetable-oil-based polyalcohol, in particular to the method for preparing vegetable-oil-based polyalcohol with soybean oil, castor oil, rubber seed oil, coriander oil, peanut oil, corn oil, colza oil, cottonseed oil, palm oil, sesame oil or sunflower seed oil and other vegetable oil as raw materials. The method for preparing the vegetable-oil-based polyalcohol includes the steps of placing bifunctional titanium silicate molecular sieve catalysts carrying precious metal titanium and palladium, the vegetable oil and a solvent into a reaction kettle to be heated to 40 DEG C to 70 DEG C, replacing air through O2, then feeding H2 and O2 to 0.8 MPa, and then synthesizing the vegetable-oil-based polyalcohol in one step. Through the method, H2O2 is directly synthesized, and then the H2O2 and a downstream product are synthesized and integrated into the same reaction kettle, and consequently the industrialized cost is reduced; meanwhile, the method is simple in preparation method and free of corrosion to equipment, catalysts can be reutilized for many times, no acid wastewater is generated, environmental pollution is avoided, and thus the method has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a preparation method of vegetable oil-based polyols. Background technique [0002] With the increase of oil consumption, human beings are facing the increasing shortage of oil resources and the rising price of crude oil. The cheap and easy-to-get vegetable oil is attracting more and more people's attention as a renewable resource for the production of chemical raw materials and fuels. As a renewable raw material, vegetable oil can be further hydroxylated under the action of a catalyst to form vegetable oil polyols with different hydroxyl values, molecular weights and viscosities. And because the main component of vegetable oil—fatty acid glyceride has hydrophobicity, it can be used to prepare polyurethane polyol. Polyurethanes prepared with polyurethane polyols not only have good chemical and physical properties, but also have excellent hydrolysis resistanc...

Claims

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Application Information

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IPC IPC(8): C07C67/31C07C69/675C07C69/732
CPCC07C67/31C07C69/675C07C69/732Y02P20/584
Inventor 郑志锋黄元波杨晓琴郑云武
Owner 云南神宇新能源有限公司
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