Technology to improve yield and capacity of the butadiene extraction facility which uses C4 as feedstock supplied by ethylene plant

摘要

This technology aims to improve yield and throughput of butadiene extraction facility which uses C₄ as feedstock supplied by ethylene plant. The key point of the technical solution is to properly broaden quality index of trans-butene-2 and cis-butene-2 in secondary rectification tower. In addition, an alkyne rectification tower is added to the extraction process. The main application is to improve the yield of butadiene extraction facility and its throughput. The major benefits are that butadiene yield is improved by 1% to 2% and the throughput is increased by 10%.