摘要
Abstract
In the production process of 1,3-butadiene,not only the polymerization of 1,3-butadiene in high concentration leads to plant shutdown,but also the production of unsaturated hydrocarbon materials such as propyne,propadiene,ethyl acetylene and vinyl acetylene,which are at risk of explosion.In terms of the emission safety of propyne and C4 alkyne and the competitiveness of 1,3-butadiene products,the 1,3-butadiene extraction unit using N-methyl pyrrolidone(NMP)with propyne pre-distillation and the traditional butadiene extraction unit using NMP were compared.The results show that compared with the traditional 1,3-butadiene extraction unit using NMP,the 1,3-butadiene extraction unit using NMP with propyne pre-distillation emits lower concentration of propyne in the propyne material and has higher safety.The emission of C4 alkynes is a combination of gas phase dilution and liquid phase dilution,and the process design is more reasonable and safer.Due to the characteristics of the propyne pre-distillation tower,p-tert-butylcatechol/toluene inhibitor is not added to the unit,so that there is no toluene impurity in the 1,3-butadiene product,which is more friendly to the downstream device and improves the competitiveness of the 1,3-butadiene product.关键词
1,3-丁二烯/抽提/N-甲基吡咯烷酮/炔烃/安全生产Key words
1,3-butadiene/extraction/N-methyl pyrrolidone/alkyne/safe production分类
化学化工
