Study On Green Preparation And Engineering Basis Of Polyisobutylene Amine

In recent years,the increase in the number of cars has brought many negative effects.Exhaust emissions have become an important source of air pollution Reducing gasoline consumption and improving emissions have become a top priority in the field of energy research.The addition of detergent dispersants in gasoline can improve this situation.At present,the gasoline detergent dispersant used in the domestic and foreign markets is mainly the fourth generation products,and its main ingredient is polyisobutylene amine.In this paper,we focused on synthesis path and engineering basis of polyisobutylene amine.Research in green preparation method of PIBA,firstly,the epoxy polyisobutylene was obtained when hydrogen peroxide was added into the former mixed solution with the existence of the solid acid catalyst WO₃/ZrO₂ and acetate.The epoxy polyisobutylene was used as raw materials to react with ammonia under super-critical reaction conditions.Recently,solid acid catalysts,et al.WO₃/ZrO₂ has attracted much attention of the researchers,due to their acidity,therzal stability,environmentally friendly.Through the controlling and adjusting of the key process parameters during the preparation of the catalyst,WO₃/ZrO₂ which applies to the epoxidation of the polyolefin was prepared by coprecipitation.Meso-porousmaterial tungsten-promoted zirconia?WO₃/ZrO₂?was prepared by surfactant-assisted coprecipitation.The properties and of structure the catalyst were performed by N2 adsorption-desorption,FTIR pyridine adsorption spectroscopy,X-ray diffraction,NH3-temperature programmed desorption,thermal analysis,respectively.For the first time,it had good catalytic activity in the epoxidation of polyolefin.The effects of the amount of solid acid WO₃/ZrO₂,the ratio of reactants and the temperature on the epoxidation were investigated..As to the epoxidation of the polyolefin,effects of some factors,such as,the solid acid catalyst content,the molar ratio of reactants,and the reaction temperature on the epoxidation reaction were investigated.The optimum conditions were obtained:reaction temperature:80?,the molar ratio of acetic acid/PIB was 1.4:1.Firstly,the intrinsic kinetics of peracetic acid reaction was studied in the epoxidation of polyisobutylene.The reaction kinetics model with different rate-determining step was discussed and block diagram for estimation of kinetic parameters was established.The nonlinear model parameters were estimated by Levenberg-Maquardt method,and relative error analysis of the nonlinear model equations was used.The results showed that the model was reliable.Secondly,the partition coefficient of acetic acid and peracetic acid in liquid-liquid two phase were considered.The epoxidation process was studied and liquid-liquid-solid three-phase model was established.Parameters of the model were obtained.Ordinary differential equations were solved in terms of Runge Kutta methods.The change of the molar concentration with time under different temperatures was studied.The kinetic models established were in good agreement with the experimental data.We focus on the influence caused by temperature,catalysts and content to the supercritical reaction of ammonia.The kinetics of the reaction was studied,and the kinetic model was established.Based on the data,the rate constant and activation energy have been calculated.Through the characterization of DSC-TGA,the product PIBA is fully decomposed,and it is an excellent detergent-dispersant.An environmental friendly circular process of PIBN has been brought forward in this paper.The research results provide a theoretical basis for the development and design of industrial devices in the future.The research results provide a theoretical basis for the development and design of industrial devices in the future.