二硝基苯生产过程中硝基酚生成原因及控制

Cause and Control of Nitrophenol Formation in the Production of Dinitrobenzene

结合工业化连续逆流硝化法生产二硝基苯的生产实际,探讨了反应温度、硫酸比、废酸中硝酸含量、模数等因素对副产物硝基酚生成的影响,同时提出中和洗涤分离硝基酚及硫氢化钠还原硝基酚的方法.该方法能够降低二硝基苯生产过程中副产物硝基酚带来的安全隐患,提升本质安全.

With the actual production of industrialization production of two continuous countercurrent nitration of nitrobenzene,the effects of reaction temperature,sulfuric acid,waste acid nitrate content,modulus and other factors on the by-products of nitrophenol generation is analyzed.The paper puts forward the method of separation and washing of nitrophenol and sodium hydrosulfide reduction of nitro phenols.This method can reduce the safety potential of the by-product nitrophenol in the production of two nitrobenzene,and enhance the intrinsic safety.