碳四抽提丁二烯

毕业设计（论文）设计（论文）题目：

学院名称：化学工程学院

专业：化学工程与工艺

班级：

姓名：学号

指导教师：职称

摘要

丁二烯是一种具有广泛用途的化工产品，其生产、制备的研究进行了数十年。目前仍然未停止对其工艺的调整与改进。工业生产中常用在碳四馏分中加入一种溶剂进行萃取的特殊精馏来实现对C4馏分的分离。本设计以从碳四中抽提丁二烯为目的，依据经济、节约、环保、科学的理念，制定出抽提段的工艺。目前世界上大规模工业化生产丁二烯-1

的方法主要有三种：乙腈法（ACN）、二甲基甲酰胺法

，3

（DMF）和N-甲基砒硌烷酮法（BASF）。工艺采用DMF法，从碳四混合物中抽提出符合工艺要求的丁二烯。设计中对DMF法抽提丁二烯的原理、工艺、操作规范、物料衡算、废物处理等发面进行了阐述。DMF抽提丁二烯装置可分为两个部分：萃取部分和精馏部分。萃取部分包括第一萃取精馏系统和第二萃取精馏系统，碳四原料中的丁烷、丁烯等在第一萃取精馏系统中脱除，乙烯基乙炔、一部分乙基乙炔等组分在第二萃取精馏系统中脱除；精馏部分包括丁二烯净化和溶剂精制两系统，除去其中的二甲胺、甲基乙炔、水、顺丁烯-2等杂质，得到丁二烯成品；而溶剂精制系统是将循环溶剂中的水分，二聚物等轻组分及焦油等重组分除去，保持循环溶剂的质量。设计结果科学、合理，实用、经济，比较好的完成了当初所设定的目标任务。

关键词：碳四；丁二烯；抽提；DMF

ABSTRACT

Butadiene is a widely used chemical products, its production, research on the preparation for decades. At present, still did not stop the process of adjustment and improvement. Special rectification commonly used in industrial production in four fractions of carbon with a solvent extraction to achieve separation of C4 fractions. The design for the purpose of butadiene extraction from carbon 4, on the basis of the economic, environmental protection, conservation, scientific ideas, develop process extraction section. The large-scale industrial production of butadiene with -1, there are three main methods: acetonitrile (ACN), two methyl formamide (DMF) and N- methyl pyrrole azululanone method (BASF). Process using DMF method, is proposed to meet the process requirements of the butadiene extraction from carbon four mixture. The design of DMF butadiene extraction principle, process, operation, material balance, waste disposal and other aspects are discussed. DMF Extraction Butadiene device can be divided into two parts: the extraction and distillation. The extraction part includes the first extractive distillation system and the second system of extractive distillation, carbon four of raw materials, such as butane butene in the first extraction distillation system removal, vinyl acetylene, a part of ethyl acetylene and other components removal in second extraction distillation system; distillation part includes the butadiene purification and solvent refining two system, remove the two -, methyl acetylene, water, CIS butene -2 impurities, butadiene get finished products; and solvent refining system is the circulation of water in the solvent, two dimers and other light components and tar and other restructuring removed, maintain the quality of circulating soluble agent. The design result is scientific and reasonable, practical, economic, better to complete the target mission set.

Key Words：Butadiene；C4 Fractions；Extraction；DMF