基础化工周报：乙烷价格下滑，气头制烯烃路线盈利能力加强-20250727

1. Report Industry Investment Rating No information provided in the content about the industry investment rating. 2. Core Viewpoints of the Report - The profitability of the gas - based olefin production route has strengthened due to the decline in ethane prices [1]. - The prices and gross profits of pure MDI, polymer MDI, and TDI in the polyurethane sector have increased this week [2]. - In the oil - gas - coal olefin sector, the prices of raw materials such as ethane, propane, and stone naphtha have changed, and the theoretical profits of different production processes for polyethylene and polypropylene have also changed [2]. - In the coal chemical sector, the prices and gross profits of products such as synthetic ammonia, urea, DMF, and acetic acid have changed [2]. 3. Summary by Relevant Catalogs 3.1 Basic Chemical Weekly Data Briefing 3.1.1 Related Company Performance Tracking - The basic chemical index had a weekly increase of 4.0%, a monthly increase of 9.0%, a quarterly increase of 13.7%, an annual increase of 34.4%, and a year - to - date increase of 15.3% as of July 25, 2025 [8]. - The stock price increases of relevant companies such as Wanhua Chemical, Baofeng Energy, Satellite Chemical, and Hualu Hengsheng in different time periods are different, and their profit - related indicators such as net profit and PE also vary [8]. 3.1.2 Polyurethane Industry Chain - The weekly average prices of pure MDI, polymer MDI, and TDI were 16,800 yuan/ton, 15,560 yuan/ton, and 16,148 yuan/ton respectively, with a week - on - week increase of 200 yuan/ton, 660 yuan/ton, and 2,612 yuan/ton respectively. The corresponding gross profits were 3,649 yuan/ton, 3,335 yuan/ton, and 4,425 yuan/ton, with a week - on - week increase of 176 yuan/ton, 591 yuan/ton, and 1,321 yuan/ton respectively [8]. 3.1.3 Oil - Gas - Coal Olefin Industry Chain - The weekly average prices of raw materials such as ethane, propane, and stone naphtha changed. For example, the price of ethane was 1,255 yuan/ton, a week - on - week decrease of 79 yuan/ton [8]. - The theoretical profits of different production processes for polyethylene and polypropylene also changed. For example, the theoretical profit of ethane cracking to produce polyethylene was 1,257 yuan/ton, a week - on - week increase of 76 yuan/ton [2][8]. 3.1.4 C2 and C3 Plates - In the C2 plate, products such as ethylene, HDPE, and ethylene glycol had price and spread changes. For example, the price of ethylene was 5,866 yuan/ton, a week - on - week decrease of 4 yuan/ton [10]. - In the C3 plate, products such as propylene, polypropylene, and acrylic acid also had price and spread changes. For example, the price of propylene was 5,503 yuan/ton, a week - on - week decrease of 24 yuan/ton [10]. 3.1.5 Coal Chemical Industry Chain - In the coal - coking products, the prices of coking coal and coke changed. For example, the price of coking coal was 1,082 yuan/ton, a week - on - week increase of 33 yuan/ton [10]. - In traditional coal chemical products, the prices and gross profits of products such as synthetic ammonia, urea, and DMF changed. For example, the price of synthetic ammonia was 2,354 yuan/ton, a week - on - week increase of 102 yuan/ton [10]. - In new materials, the prices and gross profits of products such as DMC, oxalic acid, and octanol changed. For example, the price of DMC was 12,300 yuan/ton, a week - on - week increase of 1,180 yuan/ton [10]. 3.2 Basic Chemical Weekly Report 3.2.1 Basic Chemical Index Trend No detailed content provided in the given text about the basic chemical index trend analysis. 3.2.2 Polyurethane Sector - The prices and gross profits of pure MDI, polymer MDI, and TDI have increased, and their price and profit trends are presented through relevant charts [2][17]. 3.2.3 Oil - Gas - Coal Olefin Sector - The prices of raw materials such as MB ethane, NYMEX natural gas, and East China propane have changed, and the profitability of different production processes for polyethylene and polypropylene has also changed, which are presented through relevant charts [24][31]. 3.2.4 Coal Chemical Sector - The prices and gross profits of products such as coking coal, coke, urea, and acetic acid have changed, and their price and profit trends are presented through relevant charts [41][45].