The effect of 1,3-butadiene polymerization reaction on the extraction efficiency for the solvent DMF- the exploration of the factor of popcorn polymer formation

• Main Authors: Lin Ching Huei, 林清輝
• Other Authors: Mr. Lee
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/61836682881724247770

碩士 === 國立中央大學 === 化學工程研究所 === 82 === In a butadiene recovery plant, there are three different forms of butadiene polymer: (1)liquid butadiene dimer, (2)dark tarlike polymer, and (3)solid, benzene-insoluble popcorn polymer. Because of clogging the pipe lines, condensers, storage tanks, etc., these polymers greatly increase the difficulty of maintaining a plant in normal operation. The object of the present study was the investigation of temperature, additives, and oxygen influences on the formation of butadiene polymer through experiments. The experimental results indicate that Popcorn polymerization tends to be catalyzed at high temperature by the temperature overshooting in the butadiene purification section, so the temperature control is very important. In the presence of oxygen, it not only catalyzes popcorn polymerization, but consumes a great quantity of butadiene. So the oxygen content should be controlled effectively in a butadiene recovery plant. In the extractive distillation columns, butadiene is easy to form dimer, and then dark tarlike polymer. So the condensed liquid, which contained dimer, collected in the reflux tanks of first and second stripper should be thoroughly cleaned to remove dimer before reflux into the first and second stripper.