Study On The Reaction Kinetics Of Bisphenol A Synthesis And Its Resin Catalyst

The preparation of modified resin catalyst for bisphenol A and the kinetics of the synthesis of BPA are studied in this paper. As a result, a new aid-catalyst is sieved and the kinetics equation in real reaction process is acquired. The main works of the study are as follows:The better basic resin and promoter were obtained through sieving, and the aid-catalyst's preparation was completed. The evaluating consult of the BPA synthesis shows that the molar yield ,BPA concentration and selectivity of the ion-exchange resin modified by the above promoter in BPA synthesis are 84.69%, 23.78%, 96.12% respectively. The modified catalyst behaved steadily in a continuous evaluating experiment, the selectivity and yield in 40 days are 95%, 93-95% respectivly.The synthesis mechanism of bisphenol A, especially the action mechanism of thiol in modifying resin catalyst was discussed, advice about the selection of thiol-promoter was made；The curve of the promoter's chemical adsorption at positive ion-exchange resin was measured in the experiment, where phenol was used as solvent. The regression of the adsorption data at 70℃ shows that the relationship among the adsorption rate, reaction time and solution concentration is the following:According to the experimental data and their fittings by method of least squares, various mechanisms and equations are sieved. As a result, the rate determining step of the overall reaction and the rate equation in non-ideal states are attained. The rate equation is the following: The above equation is a power rate equation which is applied in real reactions, and has been proved to be true in theory. It gives a theory basis for the industrial application of the synthesis of bisphenol A.