Equipment for continuous preparation of hydrogenated bisphenol a and continuous preparation method of hydrogenated bisphenol a

Abstract

The invention discloses an equipment for continuous preparation of hydrogenated bisphenol A and a continuous preparation method of hydrogenated bisphenol A. The preparation method is as follows: mixing bisphenol A with a solvent, passing the material through a metering pump and a preheater, Add hydrogen together into a tower-type fixed-bed reactor and use a supported nickel-based hydrogenation catalyst for hydrogenation reaction to generate a hydrogenated bisphenol A crude product. The crude product undergoes secondary separation, and the hydrogen and solvent obtained from the separation are recycled, and the obtained product contains The hydrogenated bisphenol A crude product with a small amount of solvent is extruded into pieces by a vacuum screw extruder to obtain a hydrogenated bisphenol A product. The solvent obtained by vacuuming can be recycled. This preparation process can make the conversion rate of the hydrogenation reaction reach 100%. The purity is higher than 97%, the product purity is more than 98%, and it can be produced continuously. It has the characteristics of good hydrogenation effect, high production efficiency, high degree of automation, and low production cost, suitable for mass production.

Description

technical field [0001] The invention relates to preparation equipment and a preparation process of hydrogenated bisphenol A, in particular to a method for continuously preparing hydrogenated bisphenol A by using bisphenol A as a raw material and using a fixed-bed reactor. Background technique [0002] Hydrogenated bisphenol A (HBPA for short) is an important raw material for the production of synthetic materials such as epoxy resin, unsaturated resin, polycarbonate, polyacrylic acid resin, etc. It has the advantages of thermal stability, chemical stability and weather resistance, and has a wide range of applications . Especially in epoxy resin, it is an important means of epoxy resin modification. [0003] The preparation of hydrogenated bisphenol A is to use bisphenol A as a raw material, which is produced by hydrogenation reaction under the action of a catalyst in a solution state. The preparation of hydrogenated bisphenol A belongs to the hydrogenation of aromatic compo...

AI Technical Summary

Problems solved by technology

Only the Chinese patent CN106866365A has made a more detailed description of the overall fixed-bed hydrogenation process. It uses alumina modified with alkali metals or phosphorus elements as a carrier, and its active component is one of Pd, Ru, and Rh. or a variety of noble metal catalysts, hydrogenation is carried out in a tubular fixed-bed reactor, but in order to improve product quality, the hydrogenated bisphenol A product needs to be recycled, and the product production energy consumption is high. At the same time, noble metal catalysts are used, and the catalyst products are also higher

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