【摘要】 在负压系统中,采用真空热裂解法裂解废聚四氟乙烯(waste PTFE)塑料,对四氟乙烯(TFE)单体生产工艺进行研究。考察了裂解压力、裂解温度对废PTFE的转化率和TFE收率的影响。结果表明,裂解压力是影响裂解产物中TFE质量分数的主要因素。在一定温度下,降低裂解压力,有利于提高TFE收率。当裂解温度为500℃,系统绝对压力小于0.5kPa时,TFE收率可达98%。更多还原

【Abstract】 In the subatmospheric pressure system,the preparation of tetrafluoroethylene(TFE) monomer by pyrolyzing waste polytetrafluoroethylene(PTFE) was studied.The pyrolyzing pressure and temperature were investigated.The results showed that the pressure was the most important factor in pyrolysis process.At a certain temperature,it was favorable for increasing TFE yield under lower pressure of the pyrolysis.When the pyrolyzing temperature was 500 ℃ and pressure lower than 0.5 kPa,the yield of the TFE was 98%.更多还原