Preparation method of super-crosslinked polymer supported molecular sieve and Fe catalyst and application of super-crosslinked polymer supported molecular sieve and Fe catalyst in production of divinylbenzene

Abstract

The invention discloses a preparation method of a hyper-crosslinked polymer loaded molecular sieve and Fe catalyst and application of the hyper-crosslinked polymer loaded molecular sieve and Fe catalyst in production of divinylbenzene. The preparation method comprises the following step of: A1, constructing a reflux condensation device, sequentially adding 0.9302 g of diferrocene, 0.39 g of benzene and 0.4948 g of 1, 2-dichloroethane into a 50ml two-neck round-bottom flask, then adding an external crosslinking agent dimethoxymethane FDA, stirring for 30 minutes, then, rapidly adding 0.8110 g of anhydrous FeCl3 into the device to obtain a mixture K, and heating the mixture to complete condensation polymerization reaction to generate a microporous structure. According to the present invention, the super-crosslinked polymer is adopted as the carrier to load the ZSM-5 molecular sieve and the Fe, the prepared catalyst has high activity and high selectivity on the reaction of catalyzing the synthesis of divinylbenzene from ethylbenzene and diethyl carbonate, the preparation of divinylbenzene from ethylbenzene and diethyl carbonate is performed in a fixed bed reactor, and the whole catalytic reaction has the characteristics of low energy consumption, high selectivity, high activity and the like.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a preparation method of a hypercrosslinked polymer loaded molecular sieve and an Fe catalyst and its application in the production of divinylbenzene. Background technique [0002] In recent years, with the rapid development of polymer materials, divinylbenzene, as a functional monomer, has been expanding its application fields. The divinylbenzene molecule contains two vinyl groups, forming three isomers: ortho, meta, and para. Refining divinylbenzene, increasing the content of intermediate and para-body in the mixture, and obtaining products with different purity levels have become the main controlling factors of market price. Low-purity divinylbenzene can be directly used as a functional chemical crosslinking agent, widely used in adhesives, professional plastics, and elastomers. Divinylbenzene and styrene are cross-linked and polymerized to produce ion-exchange resi...

AI Technical Summary

Problems solved by technology

[0003] However, in actual production, the catalyst induction period is long, and in the middle and late stages of production, catalytic efficiency reduction and surface coking are prone to occur, and a large amount of water vapor needs to be continuously added during the reaction Catalyst regeneration, resulting in high energy consumption

[0004] The catalytic performance of the existing production process does not match the production requirements and product quality, which has become a development bottleneck and technical barrier for the production of highly selective divinylbenzene