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Bisphenol A synthesis catalyst and its preparation method

A catalyst and bisphenol technology, applied in the field of bisphenol A synthesis catalyst and its preparation, can solve the problems of poor temperature resistance, catalyst poisoning and deactivation, impurities and color, etc., to achieve improved temperature resistance, not easy to block, and high utilization rate Effect

Inactive Publication Date: 2005-05-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned technologies have developed co-catalysts of various molecular structures and methods of introducing them into the base resin, these technologies have brought a certain degree of improvement in the activity and selectivity of the catalyst, but sulfonic acid-type cation exchange resins are generally It has the disadvantage of poor temperature resistance. The sulfonic acid group will gradually fall off when heated, and the catalytic activity will gradually decrease. At the same time, the fallen sulfonic acid group will corrode the reactor and circulation pipeline, and the dissolved metal ions will easily cause catalyst poisoning and loss. Active, reduce the service life of the catalyst, and bring impurities and color to bisphenol A products, affecting product quality
Some catalysts also have the disadvantages of low utilization of active centers and easy blockage of catalyst pores
However, these technologies are limited to changes in the type of co-catalyst and the introduction method, without involving the base resin itself, and cannot effectively solve the above problems

Method used

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  • Bisphenol A synthesis catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In a 1000 ml four-necked flask equipped with a stirrer, a thermometer, and a condenser tube, add 2.4 grams of gelatin and 400 milliliters of water, stir to dissolve the gelatin, then add 191 grams of p-chlorostyrene and 11 grams of divinylphenyl Methane and 1.3 g of benzoyl peroxide were heated up to 70°C with stirring, kept for 1 hour, and then heated to 80°C for 6 hours. The materials were taken out, washed with water, and dried to obtain white balls of colorless and transparent copolymers.

[0031] In a 1000 ml four-neck flask equipped with a stirrer, a thermometer, and a condenser, add 200 grams of the copolymer white balls prepared by the above method, 200 ml of dichloroethane, stir to make the resin swell, and then add 600 ml of concentrated sulfuric acid , heat up and evaporate dichloroethane to 90°C, keep warm for 12 hours, cool, carefully dilute with water, and wash with water until neutral. Drain, the water content of the sulfonated resin (a), the exchange cap...

Embodiment 2

[0034] As example 1, change p-chlorostyrene to p-fluorostyrene, change the consumption of divinylphenylmethane to 6 grams, and keep other conditions constant, the properties of sulfonated resin (b) and catalyst (B) are shown in the table 1

Embodiment 3

[0036] In a 1000 ml four-necked flask equipped with a stirrer, a thermometer, and a condenser tube, add 2.4 grams of gelatin and 400 milliliters of water, stir to dissolve the gelatin, then add 180 grams of styrene, 20 grams of divinylphenylmethane and 1.3 grams of benzoyl peroxide, heated to 70°C with stirring, kept warm for 1 hour, then raised to 80°C and kept warm for 6 hours, took out the material, washed with water, and dried to obtain white balls of colorless and transparent copolymers.

[0037] In a 1000 ml four-neck flask equipped with a stirrer, a drying tube, and a condenser tube, add 52 grams of the copolymer white balls prepared by the above method, 400 ml of carbon disulfide, stir to make the resin swell, and then add 140 grams of anhydrous trichloro Aluminum, slowly add 50 g of acetic anhydride dropwise at 10-30 ° C, reflux for 4 hours, cool, evaporate carbon disulfide, wash the resin with 10% hydrochloric acid, water, methanol, and dry to obtain acetylated copoly...

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Abstract

The invention relates to a catalyst for synthesizing bisphenol A by an ion exchange resin method and a preparation method thereof. It uses styrene or substituted styrene as a monomer, divinylphenylmethane, etc. as a crosslinking agent to synthesize a relatively uniform crosslinked interpolymer, and the interpolymer is used to prepare bisphenol A after sulfonation and temperature resistance modification The base resin of the catalyst is modified according to the conventional technology with mercaptoalkylamine as the mercaptolation agent, and the base resin is modified by a partial neutralization method to obtain a bisphenol A synthesis catalyst. The present invention introduces electron-withdrawing groups such as halogen (including fluorine, chlorine, bromine), nitro or carbonyl on the cross-linked polystyrene type cation exchange resin, the temperature resistance of the resin is significantly improved, the degradation rate of the sulfonic acid group is low, and it has The advantages of high utilization rate of active centers and uneasy blockage of catalyst pores, catalytic activity, selectivity and service life can meet the needs of bisphenol A production.

Description

Technical field [0001] The invention relates to a catalyst for synthesizing bisphenol A by an ion exchange resin method and a preparation method thereof. Background technique [0002] The synthesis of bisphenol A by ion exchange resin has simple process, less corrosion of equipment, and less three wastes. An advanced production process of bisphenol A, the raw material of high insulation grade epoxy resin. [0003] Currently used ion exchange resin catalysts, the base resin is a gel or macroporous sulfonic acid type cation exchange resin with an exchange capacity of 2.0-5.5 mmol / g dry resin. Such as sulfonated styrene-divinylbenzene copolymer, sulfonated phenolic resin, etc., applicable brand names such as: Amberlite-118, -200, -IR, -XE307; Amberlyst-15; Dowex-50, -MSC -1; Permutit QH; Chempro C-20; Purolite CT151; CT124, etc. [0004] The above-mentioned basic resin is modified into a catalyst for the synthesis of bisphenol A, and the method usually adopted is to introduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/10
Inventor 陈群何明阳张卫红张文雯郭一
Owner CHINA PETROLEUM & CHEM CORP
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