10万t/a混合C5生产1,4-丁二醇工艺中氧化反应器的模拟与优化

Study on the simulation and optimization of the oxidative reactor in the mixed C5 hydrocarbons to BDO process with a treatment capacity of 100000 t/a

针对10万t/a顺酐法生产1,4-丁二醇工艺受原料影响较大的缺陷,结合我国混合C5烃的市场情况,采用C5原料生产1,4-丁二醇,针对该工艺的关键设备-正戊烷氧化反应器,采用Aspen Plus软件对影响顺酐和苯酐产率和选择性的关键参数进行了灵敏度分析,优化了反应参数,提高了顺酐和苯酐的产率和选择性。在优化条件下,正戊烷的转化率以及苯酐和顺酐的产量大大提高。在单耗不变的情况下,顺酐的产率和选择性由原来的34.1%和6.9%分别增加到45.1%和32.1%,苯酐的产率从15.7%降低到13.5%,苯酐的选择性从3.2%升高到9.6%,而一氧化碳的产率和选择性由原来的43.1%和8.7%分别降低到32.0%和2.7%。优化后的反应条件提高了顺酐的产率和选择性,有利于正戊烷氧化生成顺酐的反应。

Combined with the market situation of mixed C5 hydrocarbons in China,using C5 raw materials produced 1,4-butanediol to avoid that a maleic anhydride method for producing 1,4-butanediol(100000 t/a)was greatly affected by raw materials.The sensitivity analysis of reaction parameters of of n-pentane oxidation to maleic anhydride on the output of phthalic anhydride and maleic anhydride was analyzed by Aspen Plus software,and its optimal operating parameters were determined.Also,the conversion of n-pentane and the yield of phthalic anhydride and maleic anhydride are greatly improved.The simulation results showed the conversion of n-pentane and the yield of phthalic anhydride and maleic anhydride were greatly improved.Under the condition of the same unit consumption,The yield and selectivity of maleic anhydride increased from 34.1%and 6.9%to 45.1%and 32.1%respectively.The yield of phthalic anhydride decreased from 15.7 to 13.5%,and the selectivity of phthalic anhydride increased from 3.2 to 9.6%.The yield and selectivity of carbon monoxide decreased from 43.1%and 8.7%to 32.0%and 2.7%respectively.The optimized reaction conditions were conducive to the oxidation of n-pentane to maleic anhydride leading to an increase in the yield and selectivity of maleic anhydride.