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Petrochemical Changqing ethane-to-ethylene project | Photo: Bai Kexiong (Aug 6, 2021). Soho.com  

PetroChina Lanzhou Petrochemical Yulin Chemical operates a petrochemical complex in Yuheng Industrial Park (South Zone), Yulin City, Shaanxi Province. The facility commenced operations in August 2021 following construction that began in September 2019.​

Ethylene Production

800,000 tons/year Ethane Cracker

• Technology/Licensor: PetroChina proprietary/self-developed ethane cracking technology​
• Startup Date: August 2021​
• Feedstock: Ethane separated from Changqing Oil Field natural gas​
• Performance: Ethylene yield improved from 76.2% (2021) to 78.01% (2024)​
• Significance: China's first ethane-to-ethylene project using domestically developed technology, designated as a national demonstration project

Polyethylene Production

400,000 tons/year LLDPE Unit

• Technology/Licensor: Unipol gas phase process​
• Startup Date: 2021​

400,000 tons/year HDPE Unit

• Technology/Licensor: Hostalen ACP slurry process (LyondellBasell)​
• Startup Date: 2021​

Alpha-Olefins Production

30,000 tons/year Flexible Comonomer Unit

• Technology/Licensor: PetroChina proprietary flexible comonomer technology​
• Startup Date: September 6, 2021​
• Products: 1-butene and 1-hexene (flexible production capability)​
• Note: First industrial application of PetroChina's flexible alpha-olefin technology in China

Supporting Infrastructure

• Hydrogen By-product: Approximately 70,000 tons/year​
• Total Site Investment: Approximately 10.4 billion yuan​
• Site Area: Approximately 2,500 mu (167 hectares)​

The complex operates as a fully integrated smart factory utilizing digital twin technology and processes over 200 million data points with 30,000 data pieces per minute.