Preparation method for bisphenol F

A phenol and cation exchange technology, which is applied in the preparation of organic compounds, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of many side reactions and influence on yield, and achieve convenient operation , easy separation and recovery, simple synthesis process

Active Publication Date: 2012-06-13
湖南嘉盛德材料科技股份有限公司
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Problems solved by technology

But the higher the temperature, the more side reac

Method used

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  • Preparation method for bisphenol F
  • Preparation method for bisphenol F
  • Preparation method for bisphenol F

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1. Catalyst Preparation

[0026] The cation exchange resin was successively soaked with saturated sodium chloride solution, dilute sodium hydroxide solution with a mass concentration of 2% to 10%, and dilute hydrochloric acid solution with a mass concentration of 2% to 10%, rinsed and dried, and then put 25g into a three-necked flask. Add AlCl 3 and TiCl 4 impregnated with anhydrous ethanol solution, the molar ratio of aluminum trichloride and titanium tetrachloride is Al / Ti=0.4, the temperature of the water bath in the three-necked flask is controlled at 78°C, stirred, and refluxed for 12 to 20 hours. After impregnation, cool down to room temperature naturally, add deionized water, and stir to make the excess AlCl 3 、TiCl 4 hydrolysis. The resin was filtered, washed with deionized water until there was no Cl ion (detected with silver nitrate), dried at 100°C to constant weight, and placed in a desiccator for later use.

[0027] attached figure 1 DescriptionAlCl ...

Embodiment 2

[0032] Similar to Example 1, the difference is that the 0.5-fold xylene crystallization reaction concentrate is used, and the purity of 4,4'-BPF measured by gas chromatography internal standard method reaches 90.4%.

Embodiment 3

[0034] Similar to Example 1, the difference is that the temperature of the water bath in the preparation of the catalyst is controlled at 85° C., and the content of bisphenol F measured by the gas chromatography internal standard method reaches 81.4%.

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Abstract

The invention discloses a synthesis method for bisphenol F, in which aluminium chloride, titanium tetrachloride and modified cation exchange resin are adopted as catalysts, and phenyl hydroxide and formaldehyde are adopted as raw materials. The invention has the technical effects as follows: the aluminium chloride, the titanium tetrachloride and the modified cation exchange resin are adopted for catalysis to synthesize the bisphenol F, and the resin catalyst is easy to separate and recover and can be used repeatedly; 2, a recrystallization and reduced pressure distillation combined separation technology is adopted for coproduction of high-purity bisphenol F and common bisphenol F products, the maximum yield of the bisphenol F reaches 90 percent, the content of 4, 4'-bisphenol F in a dimethyl benzene recrystallization product reaches 93.5 percent, reduced pressure distillation after-products are mainly other two isomers, and the separation of the 4, 4'-bisphenol F is realized effectively; 3, the requirement for the concentration of the formaldehyde raw material is not strict while the traditional one stage process require that the concentration of formaldehyde is above 40 percent; and 4, the synthesis technology is simple, the operation is convenient, and the realization of industrial production is easy.

Description

Technical field [0001] The invention relates to a preparation method of bisphenol F. Background technique [0002] Bisphenol F (BPF), also known as dihydroxydiphenylmethane or diphenolyl methane, is an important chemical raw material. Bisphenol F, a product synthesized from phenol and formaldehyde, is mainly used as an additive for low-viscosity epoxy resin, special polyester, polycarbonate, information recording paper, and building structural adhesive. Its finished products have excellent performance in heat resistance, moisture resistance, insulation, processability and injection casting performance. Due to its low viscosity, bisphenol F epoxy resin is especially suitable for plastic casting of new large wind turbine blades and impregnation of fibers, so that it has better composite performance with FRP and carbon fibers. In addition, no or less diluents can be used during use, which eliminates the danger of flammability and explosion in the production process, reduces e...

Claims

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Application Information

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IPC IPC(8): C07C39/16C07C37/20C07C37/84C07C37/74B01J31/38
CPCY02P20/52
Inventor 刘跃进陈桂王庆李勇飞刘杰田娟
Owner 湖南嘉盛德材料科技股份有限公司
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