催化裂化多产丙烯的研究硕士学位论文.doc

催化裂化多产丙烯的研究硕士学位论文.doc硕士学位论文
催化裂化多产丙烯的研究
摘要
丙烯是有机化工生产过程中重要的原料之一,主要用于生产聚丙烯。聚丙烯由于具有密度小、抗张强度强、耐腐蚀等特点,在强度、刚性和透明性方面都比聚乙烯好,用途十分广泛,是最轻的通用塑料,另外聚丙烯可以作为合成树脂再进一步做成塑料,它的另一个用途是作为六大合成纤维之一的丙纶。随着经济和科技的发展,人们对聚丙烯的需求不断扩大,这也极大地促进了丙烯的市场需求量。传统蒸汽裂解生产丙烯工艺已不能满足市场的需求,结合我国目前催化裂化的生产特点,适当的调整生产方案和操作条件,在不影响油品生产的同时,提高丙烯的产量,以达到既能创造经济效益又能够明显改善目前市场供不应求的现状的目的。
本论文从这一实际出发,比较了目前各种催化裂化多产丙烯工艺技术的特点,与炼厂实际相结合,采用两段提升管催化裂化多产丙烯(TMP)技术,对此工艺的操作条件、进料方式和催化剂的选择进行了深入的探讨和研究。
以大庆常压渣油为原料,首先在不同温度、剂油比和停留时间等条件下对丙烯收率和产物分布进行了对比和优化;然后对第一段提升管反应的液体产物对多产丙烯的贡献进行了研究,以确立多产丙烯的最优方案;最后,在前期实验的基础上,对碳四烃类和汽油回炼在不同的组合进料方式上进行了一系列的实验和生产模拟。
实验结果表明,在ZSM--300分子筛催化剂的催化作用下,采用组合进料方式要比单独以常压渣油为原料产出丙烯的收率要高,可达25%左右,同时也能兼顾汽油和柴油的收率和品质,而操作条件却比催化热裂解工艺缓和许多,与常规催化裂化相差不大。可见,两段提升管催化裂化多产丙烯(TMP)工艺的优势很明显,其工业前景也很值得期待。
关键词:催化裂化,双提升管,多产丙烯,组合进料
ABSTRACT
One of the anic chemical production process of raw materials, mainly for the production of polypropylene. Polypropylene because of its density, tensile strength, corrosion resistance, and other characteristics of strength, rigidity and transparency than polyethylene and wide range of uses is the lightest of GE Plastics, another polypropylene can be used as a synthetic resin further made ​​of plastic, another use of it as one of the six synthetic fibers, polypropylene fiber. With the economic and technological development, the growing demand of polypropylene, which greatly promoted the market demand for propylene. Conventional steam cracker propylene production technology can not meet the needs of the market, combined with our current FCC production characteristics, appropriate adjustments to production programs and operating conditions, does not affect oil production, but also improve the yield of propylene, to reach both create economic benefits could significantly improve the purpose of the current market shortage of the status quo.
This paper is from this parison of the characteristics of a variety of FCC propylene technology, with the refinery's reality, with two to enhance the fluid catalytic cracking propylene (TMP) techn