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Continuous preparation method of hydrogenated bisphenol A

A technology for hydrogenating bisphenol and bisphenol, which is applied in hydrogenation preparation, separation/purification of hydroxyl compounds, organic chemistry, etc. The process is simple and the effect of improving application performance

Active Publication Date: 2017-06-20
威海新元科盛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also a small amount of fixed-bed continuous hydrogenation process, but it is not the focus of research. For example, although the hydrogenation catalyst developed by the above-mentioned Chinese patent CN1375484 can be applied to the continuous production of hydrogenated bisphenol A in a fixed-bed reactor, the research focus is on the catalytic system , the fixed-bed reactor is only used as an investigation method for the catalyst system, and the individual hydrogenation reaction link is discussed, and the overall fixed-bed hydrogenation process flow is not further explained

Method used

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  • Continuous preparation method of hydrogenated bisphenol A
  • Continuous preparation method of hydrogenated bisphenol A
  • Continuous preparation method of hydrogenated bisphenol A

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preparation example Construction

[0022] A kind of continuous preparation method of hydrogenated bisphenol A of the present invention, it comprises the steps:

[0023] First, the bisphenol A raw material is prepared into a solution with a certain concentration and stored in the raw material tank 9 , and then mixed with hydrogen gas at the inlet of the tube reactor 11 after being boosted by the metering pump 10 . Fresh hydrogen passes through the pressure stabilizing valve 1 to maintain a stable pressure, and then enters the inlet buffer tank 3 after being measured by the flow meter 2, and enters the outlet buffer tank 5 after being boosted by the hydrogen circulation compressor 4, and the outlet buffer tank is controlled by the back pressure valve 6 5 pressure, the hydrogen is discharged from the top of the outlet buffer tank 5, the pressure is controlled by the pressure stabilizing valve 7, and the flow rate passed by the flow controller 8 is controlled, and then mixed with the boosted bisphenol A raw material...

Embodiment 1～22

[0038] Carry out the filling and hydrogenation reaction of catalyst according to the above-mentioned implementation method, carry out the hydrogenation reaction effect investigation under different process conditions, wherein each condition is stable for more than 24 hours, take the hydrogenation product solution analysis result of condenser 12 outlet as investigation basis, The ratio of catalyst bed height to pipe diameter is 8:1, and the specific implementation conditions and hydrogenation product analysis data are shown in Table 1:

[0039] Table 1 Hydrogenation reaction conditions and analysis data table

[0040]

Embodiment 23～34

[0042] Carry out hydrogenation reaction according to the processing condition of embodiment 3 in the above-mentioned implementation method, and investigate the process of hydrogenation reaction product normal pressure desolvation, decompression by-product, investigate the removal effect of solvent and by-product under different processing conditions, The hydrogenated bisphenol A product was obtained after the solvent and by-products were removed, and the hydrogenated bisphenol A product was analyzed. The specific implementation conditions and analysis data are shown in Table 2:

[0043] Table 2 Desolvation, by-product conditions and product analysis data table

[0044]

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Abstract

The invention relates to a continuous preparation method of hydrogenated bisphenol A. The method comprises the following steps: carrying out a hydrogenation reaction on a prepared bisphenol A raw material in a fixed bed hydrogenation reactor under the action of a precious metal supported hydrogenation catalyst, returning the obtained hydrogenation products to the reactor according to a certain proportion in order to carry out cycle hydrogenation in order to control the ratio of the cis-trans structure in the hydrogenation product, and carrying out gas-liquid separation, normal pressure solvent removal, reduced pressure byproduct removal and sheeting treatment on the extracted partial hydrogenation products to obtain the final hydrogenated bisphenol A product, and recycling separated hydrogen and solvent. The method has the advantages of simple process flow, high controllability of the reaction process, realization of continuous preparation of the hydrogenation products, stable performances of the target product, and increase of the cis-trans isomer ratio in the hydrogenation products through the partial cycling process of the hydrogenation products, and allows the converstion rate of the hydrogenation reaction to reach 100%, the selectivity to be more than 95%, the purity of the product to be more than 97% and the cis-trans isomer ratio to reach 60%.

Description

technical field [0001] The invention relates to a preparation process of hydrogenated bisphenol A, in particular to a continuous preparation method of hydrogenated bisphenol A. Background technique [0002] Hydrogenated bisphenol A is an important raw material for the production of special epoxy resins, phenolic resins, unsaturated resins, polyacrylic resins and other synthetic materials. It has the advantages of thermal stability, light stability, chemical stability and weather resistance. Hydrogenated bisphenol A can improve the weather resistance of epoxy resin and can be used in most outdoor and special environments. [0003] The preparation of hydrogenated bisphenol A is generally obtained by dissolving bisphenol A in an appropriate solvent and performing a hydrogenation reaction under the action of a catalyst. The research on the preparation method of hydrogenated bisphenol A has a history of several decades. Most of the research focuses on the development of bispheno...

Claims

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Application Information

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IPC IPC(8): C07C29/20C07C29/76C07C35/21
CPCC07C29/20C07C29/76C07C35/21
Inventor 李璐刘金刚王超王金青张健
Owner 威海新元科盛新材料有限公司
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