副产氯化氢制氯气工程化催化剂及工艺研究

发布时间：2018-07-08 09:17

  本文选题：氯化氢 + 氯气　； 参考：《烟台大学》2017年硕士论文

【摘要】：氯气作为一类重要的基础化工原料,主要用于生产PVC、聚氨酯中间体(MDI、TDI、HDI)等耗氯产品。在有机氯化产品的生产过程中,氯原子的利用率最高只有50%,而剩余氯原子全部转化成了氯化氢,同时也给环境带来了直接或间接的影响。因此亟需加大氯化氢制氯气技术研究,提高氯原子的利用率,可采取不同的解决方法,包括电解法、直接氧化法、催化氧化法等。该技术的成功开发及推广对氯碱行业的资源利用、环境保护和可持续发展有极其重要的意义。目前,采用催化氧化法制备氯气研究较为广泛,国内外一大批学者对氯化氢氧化催化剂、设备及工艺开展一系列研究,取得了一定成绩,但依然存在催化剂寿命短、设备腐蚀严重及运行成本高等问题。本文首先对我国氯碱行业和氯化氢制氯气的发展现状做出简要概述,在此基础上对氯化氢催化氧化制氯气技术、反应器及催化剂的发展做出了介绍。其次,在实验室完成了氯化氢氧化催化剂的制备,包括HTC-05、HTC-08、HTC-10、HTC-18等,并对HTC-18催化剂进行改性,设计了直径50mm、长度500mm的氯化氢催化氧化制氯气反应器。考察了反应温度、质量空速和氯化氢/氧气进料比对氯化氢转化率的影响,得到最佳反应温度区间为400~420℃,氯化氢质量空速为0.4~0.5h~(-1),氯化氢/氧气进料比为2:1,氯化氢转化率可达到80%以上。在上述条件下,对催化剂进行连续寿命试验,稳定运行240h以上活性基本不变,同时进行挂片试验确定了设备选材为哈C-276合金。最后,在实验数据基础上完成1.5万吨/氯化氢氧化制氯气工艺开发设计,利用模拟软件对工艺条件、热量的综合利用进行优化并对工艺流程、主要工艺控制点做出了说明。
[Abstract]:As an important basic chemical raw material, chlorine is mainly used to produce PVC, polyurethane intermediate (MDI TDI HDI) and other chlorine consuming products. In the production of organic chlorinated products, the highest utilization rate of chlorine atoms is only 50%, while all the remaining chlorine atoms are converted into hydrogen chloride, which also has direct or indirect effects on the environment. Therefore, it is urgent to increase the technical research of chlorine production from hydrogen chloride and improve the utilization ratio of chlorine atoms. Different solutions can be adopted, including electrolysis, direct oxidation, catalytic oxidation and so on. The successful development and popularization of this technology is of great significance to the utilization of resources, environmental protection and sustainable development of chlor-alkali industry. At present, the catalytic oxidation method for the preparation of chlorine gas is widely studied. A large number of scholars at home and abroad have carried out a series of studies on hydrogen chloride oxidation catalyst, equipment and process, and obtained some achievements, but the catalyst still has a short life. Serious equipment corrosion and high operating costs and other problems. In this paper, the development of chlor-alkali industry and hydrogen chloride to chlorine gas in China is briefly summarized, and the development of catalytic oxidation of hydrogen chloride to chlorine gas technology, reactor and catalyst are also introduced in this paper. Secondly, the hydrogen chloride oxidation catalyst was prepared in the laboratory, including HTC-05N HTC-08-HTC-10 HTC-18, and the HTC-18 catalyst was modified. The catalytic oxidation of hydrogen chloride with diameter of 50mm and length of 500mm was designed to produce chlorine gas. The effects of reaction temperature, mass space velocity and feed ratio of hydrogen chloride / oxygen on the conversion of hydrogen chloride were investigated. The optimum reaction temperature range was 400 ~ 420 鈩，

本文编号：2106954