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Ethylene Tar Unit Dynamics

Published on 2026-09-09

Maintenance status, 2021–2026 (unit: days)

Enterprise Name Maintenance Period Maintenance Duration (Days) Remarks
Maoming Petrochemical 2021.3.25–5.5 40
Fushun Petrochemical 2021.4.05–5.19 44 Maintenance originally planned for Apr 10 was moved up to Apr 5.
Jilin Petrochemical 2021.6.4–7.22 48
Shanghai Petrochemical 2021.4.15–6.20 65 Maintenance of the 400,000 t/y large ethylene unit.
Panjin Ethylene 2021.7.15–9.2 48
Qilu Petrochemical 2021.8.4–9.23 50
Yangzi Petrochemical 2021.5.23 14 Yangzi originally planned maintenance in March but postponed it to the second half of the year. The work covers one 400,000 t/y ethylene unit in the old area; only one ethylene unit is shut down.
Yanshan Petrochemical 2021.3.25–5.19 54
Zhenhai Refining & Chemical 2021.5.18–6.2 15 Zhenhai originally planned maintenance for Apr 6 but postponed it to mid-May.
CNOOC Shell (Phase I) July 13, 1905 30
Xinjiang Tianli 2021.10.27 30 Since the large ethylene unit had already been shut down early for maintenance, Tianli Co., Ltd. also shut down for maintenance.
Sinochem Quanzhou 2021.12.1–2022.1.20 50
Yangzi Petrochemical 2022.3.15–5.25 70 Yangzi's No. 2 400,000 t/y ethylene unit was shut down for maintenance on Mar 15 and restarted on May 25. The No. 1 400,000 t/y ethylene unit was shut down on Mar 28 with maintenance planned through May 31.
Maoming Petrochemical 2022.4.30 - Restarted on Aug 7.
2022.5.7
Shanghai Petrochemical 2022.6.18–8.20 - Shanghai Petrochemical's 300,000 t/y No. 2 ethylene unit was restarted on Aug 20; after stable operation, the 400,000 t/y No. 1 ethylene unit was restarted.
Dushanzi Petrochemical 2022.7.2 10 Dushanzi Petrochemical's large ethylene unit was shut down on Jul 2 due to cold box leakage, requiring about 10 days of emergency repair.
Qilu Petrochemical 2022.7.20–8.2 13 Qilu ethylene maintenance began on Jul 20, and the unit was fully shut down on the 23rd. Maintenance ended and feed was resumed on Aug 2; ethylene tar was produced on Aug 3–4.
Hengli Petrochemical 2022.8.1–8.21 20
Hengli Petrochemical 2022.9.13–9.22 10 The 1.5 million t/y ethylene cracking unit was shut down on Sep 13; maintenance was expected to last 7–10 days.
Gulei Petrochemical 2022.9.14–10.10 25 The 1 million t/y ethylene unit was briefly shut down for maintenance from Sep 14.
Zhejiang Petrochemical Phase II, Unit 2 2023.2.15–3.10 23 -
Zhenhai Refining & Chemical 2023.2.26–5.15 84 Restarted on May 15.
Liaoyang Petrochemical 2023.4.7–end May (estimated) - -
Zhejiang Petrochemical 2023.5.10–6.30 50 days -
Shanghai SECCO 2023.5.20–7.21 - Maintenance ended on Jul 21.
Lanzhou Petrochemical 2023.6.6 Planned 60 days
Daqing Petrochemical 2023.6.10–7.20 40 Daqing Petrochemical: Jun 10–Jul 20; Huake: Jun 12–Jul 30.
Zhongke Refining & Chemical 2023.7.13–7.27 14 days Restarted on Jul 27.
CNOOC Shell 2023.7.17–7.27 10 days Restarted on Jul 27.
Baolai Petrochemical 2023.7.31–9.24 55 days Restarted on Sep 24.
Yangzi-BASF 2023.9.5–9.25 20 days Products began to be produced on Sep 25.
Sichuan Petrochemical 2023.9.15–11.15 60 days
Shanghai Petrochemical 2023.9.25– Shanghai Petrochemical small ethylene unit.
Zhenhai Refining & Chemical 2023.10.16–11.2 18 days Restarted on Nov 2.
CNOOC Shell (Phase II) 2023.10.20–12.10 50 days
Guangzhou Petrochemical 2023.10.13–11.8 26 days
Maoming Petrochemical 2023.12.24–3.15 82 days No. 1 cracking unit.
Shanghai SECCO 2023.12.04–12.11 7 days
Qilu Petrochemical 2023.12.23–
Baolai Petrochemical 2023.12.27–2024.1.04 Estimated 10 days
Guangzhou Petrochemical 2023.12.30–1.13 14 days
Sinopec-SK Petrochemical 2024.1.16–1.26 Estimated one week
Yangzi-BASF 2024.1.25–1.30
Zhongke Refining & Chemical 2024.3.19–5.29 70 days
Zhejiang Petrochemical 2024.3.5–3.22 // 4.2–4.30 The two units are being shut down for maintenance alternately.
Zhongyuan Ethylene Early Apr 2024–May 15 Restarted on May 15
Xinjiang Tianli 2024.5.15–7.15 60 days
Zhejiang Petrochemical 2024.6.14–25 10 days
North Huajin 2024.7.12–2024.10.08 About 80 days
Dongming Petrochemical 2024.7.5–8.4 31 days
Jilin Petrochemical 2024.8.20–10.20 60 days
Fujian Refining & Petrochemical 2024.10.05–12.20 60 days
Sinopec-SK Petrochemical 2024.10.10–2025.1.8 90 days
Yangzi-BASF 2025.4.8–2025.6.3 56 days Restarted on Jun 1; products began on Jun 4.
Sinopec SABIC Tianjin 2025.04.21–2025.6.6 46 days Restarted on Jun 6.
Hengli Petrochemical 2025.05.13–2025.06.10 28 days Restarted on Jun 10.
Yanshan Petrochemical 2025.5.25–TBD Planned long-term shutdown
Fujian Refining & Petrochemical 2025.6.5–2025.6.20 16 days
Zhejiang Petrochemical 2025.6.23–2025.8.10 48 days Restarted on Aug 10.
Yantai Wanhua Phase II 2025.5.13–2025.6.25 41 days
Dongming Petrochemical 2025.7.28–2025.9.18 52 days Restarted on Sep 18.
Fushun Petrochemical 2025.8.15–2025.10.28 74 days Restarted on Oct 28.
Zhenhai Refining & Chemical 2025.9.27–2025.11.20 54 days Restarted on Nov 20.
Guangzhou Petrochemical 2025.10.13–2025.12.8 56 days Restarted on Dec 8.
Zhongyuan Petrochemical 2025.10.25–TBD TBD
Maoming Petrochemical 2025.11.26–2026.01.10 45 days One unit under maintenance.
Shanghai Petrochemical 2025.11.25–2026.1.25 62 days Restarted on Jan 25.
Sinochem Quanzhou 2025.11.25–2026.1.26 64 days Restarted on Jan 26.
Dongming Petrochemical 2025.12.13–2025.12.24 11 days Restarted on Dec 24.
United Petrochemical 2026.01.08–2026.01.19 11 days Restarted on Jan 19.
Gulei Petrochemical 2026.03.09–7.19 132 days Restarted on Jul 19.
CNOOC Shell 2026.03.06–2026.04.30 55 days Restarted on Apr 30.
Yangzi Petrochemical 2026.05.05–TBD Planned restart in August.
Sinopec-SK Petrochemical 2026.06.04–2026.07.15 39 days Restarted on Jul 15.
Hainan Refining & Chemical 2026.06.06–TBD 3–4 months Planned shutdown of 3–4 months.
Shenghong Refining & Chemical 2026.07.01–2026.08.17 48 days Restarted on Aug 17.
CNOOC Shell 2026.08.31–TBD
Source: Chempricehub

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