氯醇法生产环氧丙烷副产物二氯丙烷精制研究-化学工程专业毕业论文.docxVIP

摘 摘 要 目前环氧丙烷工业生产技术主要有氯醇法和共氧化法两种。我国环氧丙烷生产主要 采用氯醇法，以丙烯、氯气为原料，经次氯酸氧化制得氯丙醇，再经皂化制得环氧丙烷， 其生产副产物主要含有大量1，2．二氯丙烷(二氯丙烷)。目前，国内各环氧丙烷生产厂家 尚未找到合理副产二氯丙烷产品处理利用途径，为了提高氯醇法生产环氧丙烷装置的经 济效益，降低环氧丙烷产品的原料消耗，合理处理利用副产二氯丙烷是一项急待开发的 技术研究课题。 本文针对滨化集团环氧丙烷装置，为了提高二氯丙烷产品纯度，详细分析滨化集团 现有二氯丙烷生产现状、组成和存在的主要问题，对二氯丙烷处理工艺通过大量实验来 确定最佳的工艺路线，对比了水洗工艺和共沸精馏两种方法，最终确定采用水洗的方法， 对环氧丙烷装置的二氯丙烷产品进行水洗处理，分离其含有的大量氯丙醇等杂质，提高 二氯丙烷产品的质量，降低装置的氯丙醇损耗。论文研究了水洗水量、洗涤程序、洗涤 温度等对二氯丙烷中氯丙醇脱除的影响，确定了合适的工艺条件，并根据小试研究成果 建立了工业化处理装置并成功运行。该工艺装置具有流程简单、操作简易等优点，改造 后二氯丙烷产品的纯度得到很大提高，气味与色泽有了明显改观，另外将洗涤后的氯丙 醇水相输送至氯醇缓冲罐内重复利用，增加氯丙醇的利用率，降低了原料的消耗指标， 增加了装置的经济效益。该工艺的设计和运行，不仅有利于改善氯醇法环氧丙烷装置副 产物二氯丙烷产品的质量，也为国内环氧丙烷行业降低原料消耗、提高氯丙醇利用率提 供了一条行之有效的技术路线。 关键词：环氧丙烷，二氯丙烷，水洗，精制 Refining Refining of DCP Produced from Chlorine-Alcohol Method Production of Propylene Oxide Wang Xuzhong(Chemical Engineering) Directed by Professor Wang Yanzhen AB STRACT At present，the main industrial technologies for producing propylene oxide(PO)are the processes of chlorohydrination and cooxidation．Propylene and chlorine are used as raw materials to produce chlorine propanol by hypochlorite oxidation,and then epoxy propane by saponification system in chlorohy7drination process．The main byproduct is 1,2-dichloride propane(DCP)． Aiming at Befar group propylene oxide production equipment，a detailed analysis of the existing problems of Befar group Was made in order to improve the dichloride propane purity,． Through a lot of experiments，an optimum processing route of refining dichloride propane Was set up．The method of using water washing to separate the containing impurities such as propylene chlorohydrin from dichloride propane was carried out．The method not only improve the quality of dichloride propane，but also reduce the consumption of propylene chlorohydrins．This processing equipment has advantages of simplicity and easy operation etc． The smell of dichloride propane and color Was obviously improved after refining．In addition， the water containing propylene chlorohydrin after washing Was reused．Th