Research On The Synthesis Technoloogy Of Bisphenol F In The Catalysis Of Modified Cationic Exchange Resin

Wind power generate electricity is encouraged and developed by the state, wind turbine blades of wind power generate electricity is one of the core equipment. Wind turbine blades had poor working environment, so it need higher performance of weatherability and easily processed. The wind turbine blade developed toward more larger and more lightweighter, wind turbine blade materials developed from glass-fiber-reinforced composite material to carbon fiber reinforced composite. Now wind turbine blades MW have used carbon fiber reinforced epoxy resin composite material, the epoxy resin which need requirements of low viscosity, good fiber immersion, high impact resistance, good toughness. But general-purpose resin with high viscosity, impact resistance and poor weatherability. So researched the new wind power blades resin has very important significance.New Bisphenol F epoxy resin was low viscosity, strong solvent-resistant and high impact resistance, impregnated well with fiber and glass fiber reinforced plastic composite performance also as well, and low cost advantages and is optimistic about the material used to make wind power blades. Carbon fiber reinforced Bisphenol F epoxy resin composites matirial has become the new material for modern large wind power wind turbine blades. In the process of synthesis of Bisphenol F epoxy resin, Bisphenol F(BPF) is higher purity, the index of values of epoxy resin, the content of hydrolyzable chlorine were repeated better, the viscosity were lower, so the main properties of Bisphenol F epoxy resin depends on the quality of Bisphenol F. In our country, Bisphenol F products rely on foreign import, and currently Bisphenol F does not implement a large-scale industrial production, mainly because of the synthesis technology of Bisphenol F, industrial costs, product quality didn’t cross the border.Thus, this study on cation exchange resin catalyzed synthesis of Bisphenol F, as follows:1) Preparation of catalysts. Modificated pre-treatment on cation exchange resin with Aluminum chloride, Titanium tetrachloride or both materials. The determined parameter of modifying condition as follows:the same molar of AICl3and TiCl4raise to8%of all resins quality is favorable; the optimal temperature for modifying reaction should be80℃, the optimal modifying reaction time should be10hours. The chelatometric determinated with IR and TG to the resin, tested their metal content with EDTA complexometric titration method. Determinated AlCl3-TiCl4modified cation exchange resin as catalysis to synthesize Bisphenol F.2) Synthesis of Bisphenol F. Formaldehyde and phenols as raw materials, AlCl3-TiCl4modified cation exchange resin as catalysis, disscussed the effects of various factors in the synthesis of Bisphenol F system. Factors to consider include the molar ratio of phenol to formaldehyde, the quantity of catalyst, reaction temperature and reaction time. The most optimized parameter was obtained, which is:the molar ratio of phenol to formaldehyde raise to7:1is favorable;8:1of mass ratio of catalysis to formaldehyde; the optimal temperature for reaction should be80℃; the optimal reaction time should be3hours (the time should be started when formaldehyde drop over with the speed of2-3s/dirp). Used GC preparation of reaction liquid sample to analyze the response process. Under the reaction conditions, the yield up to90%of Bisphenol F (formaldehyde tester), the content of4,4’-BPF isomer up to40%which derived from Bisphenol F products.3) Aftertreatment of reaction. Used toluene and xylene on reactive liquid to recrystal, derived4,4’-Bisphenol F content from xylene recrystallization highest than other, up to93.5%. The last aftertreatment of reaction was obtained:used xylene recrystal reactive liquid, the filtrate of recrystallization used to vacuum distill, acquired ordinary Bisphenol F order though alkali and superfluous acid solutions, at the same time reclaimed the superfluous phenol and xylene. Used melting point determination apparatus, infrared spectroscopy, nuclear magnetic resonance spectroscopy and GC determination on product characterization.