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Ethylene Oxide sterilization is a chemical process consisting of four primary variables: gas concentration, humidity, temperature and time. Ethylene oxide is an alkylating agent that disrupts the DNA of microorganisms, which prevents them from reproducing.
Also in October, CNPC started up a 600,000-tpy ethylene unit that doubles capacity of Daqing Petrochemical with the country's first ethylene plant based on domestically developed technology (OGJ Online, Oct. 11, 2012). The project is part of a national push to increase ethylene capacity (OGJ Online, May 19, 2009).