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Method for preparing dihydroxyl dicyclohexyl propane

A technology of dihydroxydicyclohexylpropane and monohydric alcohol, which is applied in the field of preparation of dihydroxydicyclohexylpropane, can solve the problems such as not being able to fully meet the needs of industrial production and application, and achieves solving the bottleneck problem, with good selectivity and high activity Effect

Active Publication Date: 2014-06-18
本源精化环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although there have been some research results on the hydrogenation of bisphenol A, the existing technology cannot fully meet the needs of industrial production and application in many aspects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a 1L autoclave, add 200g of bisphenol A and 400g of isopropanol, heat to 80°C, and add 2 Alumina / g is used as a carrier, and 8g of composite metal-supported catalysts prepared by the dispersion impregnation method contain 4% of Ru, 1% of Pd, 1.5% of Ni and 0.5% of Cu. Raise the temperature and pressure under stirring, keep the temperature of the reaction system at 200°C, and the hydrogen pressure at 9MPa. After 1.5h of reaction, the hydrogen pressure of the system rises to 12MPa, and continue the reaction for 0.5h. The hydrogen absorption stops, and the reaction ends. The product was analyzed by GC-MS equipped with a flame ionization detector, and the results showed that the yield of dihydroxydicyclohexylpropane from bisphenol A was 99%, and the selectivity to trans-trans structure product was 51%.

Embodiment 2

[0026] Using methanol as a solvent, the yield of dihydroxydicyclohexylpropane from bisphenol A is 50%, and the selectivity to trans-trans structure products is 13%.

[0027] All the other are with embodiment 1.

Embodiment 3

[0029] Using ethanol as a solvent, the yield of dihydroxydicyclohexylpropane from bisphenol A is 78%, and the selectivity to trans-trans structure products is 17%.

[0030] All the other are with embodiment 1.

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Abstract

The invention discloses a method for preparing dihydroxyl dicyclohexyl propane. Bisphenol A is subjected to hydrogenation reduction in the presence of a catalyst, wherein the active ingredient of the used catalyst is Ru, and the catalyst also comprises Pd, Ni and Cu; monohydric alcohol is selected as a solvent; reaction is performed with stirring at a high temperature under a high pressure in an autoclave in an intermittent mode; and the reaction yield is improved, and the proportion of a trans-trans structural product in the products is high. The catalyst has the advantages of high activity, reuse, good selectivity and the like; and the method has extremely high economic benefit, solves the bottleneck problem caused by the catalyst in the industrialized process of the dihydroxyl dicyclohexyl propane, and is suitable for large-scale industrialized production of the dihydroxyl dicyclohexyl propane.

Description

technical field [0001] The invention relates to a preparation method of dihydroxydicyclohexylpropane. Background technique [0002] Dihydroxydicyclohexylpropane, also known as hydrogenated bisphenol A (HBPA, CAS: 1980-4-6, C 15 h 28 o 2 , M=240.38), is the alicyclic dihydric alcohol obtained by hydrogenating and saturating two benzene rings in the bisphenol A molecule. There are three isomers of dihydroxydicyclohexylpropane, and the common product is generally a mixture of the three isomers, with a boiling point of 253-257°C (2.67KPa). It is a white solid, insoluble in water, and soluble in benzene, Organic solvents such as acetone are hygroscopic. [0003] Dihydroxydicyclohexylpropane is one of the most commonly used substances in the preparation of polymers such as epoxy resin, polycarbonate, polyacrylic resin and unsaturated resin. It has the advantages of thermal stability, chemical stability and weather resistance. Especially suitable for outdoor use. For example,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/20C07C35/21B01J23/89B01J23/96
CPCY02P20/584
Inventor 赵智全
Owner 本源精化环保科技有限公司