Preparation method of dihydroxy oxethyl fluorene

Abstract

The invention belongs to the field of chemical synthesis, and relates to a preparation method of dihydroxy oxethyl fluorine. The method comprises the following steps of: executing condensation reaction of ethylene glycol monophenyl ether and 9-fluorenone in the presence of catalyst mercaptoethanol, extracting and purifying the reaction liquid by water-organic solvent, and then, obtaining the target product after recrystallization. With the preparation method provided by the invention, the reaction time is reduced, the yield is improved, the crystal form and the liquidity of products are improved, the solvent of a single type is more beneficial for recycling, and the technical operation is simplified, so that the preparation method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a preparation method of bishydroxyethoxyfluorene. Background technique [0002] In the modern polymerization processing industry, bisphenol compounds are widely used in condensation reactions, especially for the preparation of epoxy resins, polyurethanes, polycarbonates, Polycondensation products such as polyester, polyarylate, polyether or polyether, bisphenol fluorene compound and its substituted derivatives such as bishydroxyethoxy fluorene are important monomers for the synthesis of the above polymers. Bisphenol fluorene compounds and their substituted derivatives are widely used in military, aerospace, electronics, and automotive industries such as aircraft structural materials, missile warheads, engine nozzles, and housings. The resulting polymers can be used as heat-resistant materials , separation membrane materials and optical materials, etc. [0003] Elec...

AI Technical Summary

Problems solved by technology

Concentrated sulfuric acid method is the traditional production method of bisphenol fluorene; the highest yield can reach 70% when heteropoly acid is used as catalyst, and 82.6% for ion exchange resin. Secondly, the reaction of commonly used catalysts is more than 10 hours, so that bisphenol The production cycle of fluorene is quite long, thus adding more cost

Finally, the reaction temperature is relatively high. The temperature of the sulfuric acid removal method is about 50°C, while other methods basically exceed 100°C, which will increase a lot of energy consumption.

[0007] At present, the technology disclosed in China is CN200910181002.4. When this patent document synthesizes BPEF, the reaction time is relatively long, about 24 hours. On the one hand, the production efficiency is low, on the other hand, the cost increases and the yield decreases.