Coking phenomena in the pyrolysis of ethylene dichloride into vinyl chloride
Conference
·
OSTI ID:215074
- Kyushu Univ., Kasuga, Fukuoka (Japan); and others
Pyrolysis of ethylene dichloride (EDC) into vinyl chloride (VCM) which is the monomer for polyvinyl chloride, one of the most popular polymers, has been established commercially for quite a time. The process around 500{degrees}C has been proved to give VCM of high purity at very high selectivity about 99% and a reasonable conversion about 50%. However, the coking is a major problem in the long run, requiring decoking treatment every two months. The present paper describes features of carbons produced in the pyrolysis process. Coke of respective features was found in the reactor, the transfer line, the heat exchanger and the rapid quencher. Typical pyrolytic carbon, anisotropic coke produced in the liquid phase, isotropic carbon was produced on the reactor wall as low as 500{degrees}C. The mechanisms for their formation are discussed.
- OSTI ID:
- 215074
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
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