January 2020

Special Focus: Sustainability

Treat toxic, malodorous ethylene spent caustic using WAO technology

As China’s largest integrated refinery, Sinopec’s Zhenhai Refining & Chemical Co. (ZRCC) plant can process approximately 23 MM metric tpy of crude oil. The plant produces more than 50 fuel and chemical products, including different grades of gasoline, jet and diesel fuels, asphalt and polypropylene plastics, as well as more than 1 MM metric tpy of ethylene. The latter generates spent caustic, one of the world’s most toxic wastewaters.

Clark, M., Siemens Water Solutions; Xia, N., Sinoec Zhenhai Refining & Chemical Co.

As China’s largest integrated refinery, Sinopec’s Zhenhai Refining & Chemical Co. (ZRCC) plant can process approximately 23 MM metric tpy of crude oil. The plant produces more than 50 fuel and chemical products, including different grades of gasoline, jet and diesel fuels, asphalt and polypropylene plastics, as well as more than 1 MM metric tpy of ethylene. The latter generates spent caustic, one of the world’s most toxic wastewaters. Despite the toxic nature of its industry, the company takes pride in its environmental, health and safety (HSE) record—the Chinese government awarded ZRCC one of the nation’s earliest National Environment-Friendly Enterprises awards. This is important beca

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