Study On Safety Of Resin Purification Of Hydrogen Peroxide

At present,anthraquinone process is mostly used to produce hydrogen peroxide in China.In the process of producing hydrogen peroxide by anthraquinone process,a large amount of hydrogen peroxide accumulated at the bottom of oxidation tower will be produced.This accumulated liquid has high hydrogen peroxide content and poor stability,and improper treatment will lead to combustion and explosion accidents.Therefore,it is necessary to develop hydrogen peroxide purification technology and deal with it safely.After literature research,it is found that the process requirements of exchange resin purification process are low and operability is strong.However,most of the current studies only study the performance of exchange resin,which can not achieve the real sense of safe operation.In view of this,this paper combines the thermal kinetics analysis of hydrogen peroxide with resin performance analysis to study the safety of resin purification process for hydrogen peroxide.?1?Determination of Purification ObjectsAfter analyzing the impurities of hydrogen peroxide produced by anthraquinone process,it was found that iron ions had the greatest catalytic effect on the decomposition of hydrogen peroxide.Therefore,the main purpose of this study was to remove iron ions.Six different types of ion exchange resins used in the current hydrogen peroxide purification unit were selected as experimental objects.?2?Ion exchange properties of resinsThe ion exchange equilibrium of different concentrations of iron ions was measured by static exchange experiment,and the exchange kinetic curves of iron ions were obtained.The mechanism of ion exchange control is analyzed.It is found that ion exchange of iron ion belongs to particle diffusion control,and the diffusion coefficient of ion exchange resin is calculated.According to the theory of particle diffusion kinetics model,a suitable resin kinetics model was established to simulate the liquid-solid exchange behavior of iron ions in hydrogen peroxide solution with ion exchange resin.The simulation results are in good agreement with the experimental results.The resin LS-203 with the best parameters was selected to study the dynamic ion exchange performance.The mass transfer model was established and the required mass transfer parameters were obtained.The model fitted well with the experimental results.The experimental data were amplified according to the principle of the same load in the resin column.Relevant parameters such as tower height,diameter and head loss were obtained,and the concentration and dosage of regenerants were determined.?3?Study on risk of reaction out of controlIt was found that the addition of resin destroyed the stability of hydrogen peroxide in varying degrees,which should be taken into account in subsequent process production in order to improve the safety of the process.This has a guiding significance for the safety of production in the future.Advanced Kinetics and Technology Solution?AKTS?were used to process the data and obtain the activation energy and other thermodynamic parameters.The results show that the seven resins can catalyze hydrogen peroxide to varying degrees under working conditions,which increases the risk of thermal decomposition of hydrogen peroxide.The risk matrix evaluation method was used to evaluate the parameters.It was found that the runaway systems corresponding to resin-free,LSA-5BG and LS-203 resins belonged to the second-level risk,i.e.conditional acceptance risk,while the other four runaway systems belonged to the third-level risk,which was unacceptable risk.The process temperature Tp,the maximum reaction temperature MTSR,the corresponding temperature T_D2424 of TMRad for 24 hours,and the maximum temperature MTT that the technical limit can reach were analyzed by simulation of the uncontrolled scenario of reaction heat loss caused by cooling failure.It was found that LSA-5BG and LS-203 resin Tp<MTT<T_D24<MTSR belonged to the fourth grade hazard,which was the same as hydrogen peroxide.The results show that the effect on the decomposition of hydrogen peroxide is acceptable,and only the two resins are considered in the subsequent ion exchange studies.It was found that the addition of resin destroyed the stability of hydrogen peroxide in varying degrees,which should be taken into account in subsequent process production in order to improve the safety of the process.This has a guiding significance for the safety of production in the future.