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Meeting on Environmental Impact Assessment for Sinopec Guizhou Energy Chemicals’ 500,000-ton/year Polyglycolic Acid (PGA) Project Held / Author/Source: Coal Chemical Industry 114 Forum / Date: 2021-03-08 / Views: 11 On March 2, a meeting on the environmental impact assessment for Sinopec Guizhou Energy Chemicals’ 500,000-ton/year Polyglycolic Acid (PGA) project was held at the Management Committee of Zhijin Economic Development Zone. The original \"600,000-ton polyolefin project\" will not be carried out any longer; instead, a new \"500,000-ton/year polylactic acid (PGA) project\" by Sinopec Great Wall Energy Chemical (Guizhou) Co., Ltd. is planned to be built at the original site. Basic Overview of the Coal Chemical Industry Alliance Construction Project 1. Project Name: The 500,000 tons per year polylactic acid (PGA) project of Sinopec Great Wall Energy Chemical (Guizhou) Co., Ltd.; it is a new construction project. 2. Location of construction: New Energy and Chemical Industry Base in Zhijin County, Bijie City, Guizhou Province (Moda Village). 3. Construction details: The planned 500,000 tons per year polylactic acid production facility will have an initial capacity of 200,000 tons per year, with construction to be completed in 2024 ； Phase 2 will bring the capacity for polyglycolic acid to 300,000 tons per year, with completion expected in 2026. The project includes a gas gasification unit, a gas cryogenic separation unit, coupling and hydrogenation units, and a polyglycolic acid production unit; it is also equipped with a cogeneration unit and an air separation unit. Total investment for the project: 2,376,767 million yuan, of which the total investment for Phase I is 1,233,160 million yuan, and the total investment for Phase II is 1,143,607 million yuan. PGA is an ideal fully biodegradable material that can be completely degraded within 1 to 3 months; it is non-toxic and harmless, with carbon dioxide and water as its final degradation products. It has been recognized as a safely biodegradable plastic material in the United States, the European Union, and Japan, and holds great potential for use in areas such as medical sutures and biodegradable plastics. At present, PGA sheets are entirely imported. Polyglycolic acid (PGA), also known as polyhydroxyacetic acid, is the simplest linear aliphatic polyester. It is a rigid, highly crystalline thermoplastic polymer with a crystallinity of 45–55%; its melting point is around 231°C, while its glass transition temperature is approximately 35–40°C. Its high crystallinity and molecular chain structure endow it with many excellent properties. PGA with a low relative molecular mass is an ideal inducer for microbial degradation; it possesses the properties of both microbial and hydrolytic degradation, is non-toxic, and ultimately breaks down into water and carbon dioxide. It is recognized worldwide as a material that helps protect the Earth’s environment and life, and it is the material for which people hold the greatest hopes. It has been certified as a safely biodegradable plastic material in the United States, Europe, and Japan, and has passed ISO14855 standards. It is also compatible with the PET recycling technologies currently in widespread use, without affecting the quality of the recycled PET material. The editor has compiled information on two other polylactic acid projects in China: **The 50,000-ton/year polylactic acid demonstration project of Shenhua Yulin Energy Chemical Co., Ltd., part of the Energy Group. Project name:** 50,000-ton/year polylactic acid demonstration project of Shenhua Yulin Energy Chemical Co., Ltd., Energy Group. Location of construction: North Area of Qingshui Industrial Park, Yushen Industrial Zone, Yulin City, Shaanxi Province. Total investment: 940,249,800 yuan. Production capacity: 50,000 tons per year of polylactic acid. Construction contents: include a refining unit, a prepolymerization unit, a cyclization unit, a purification unit, and a polymerization and molding unit, along with supporting facilities such as an 10KV substation for the MG section, intermediate tank areas, finished product and packaging warehouses, a freezing station, a heat transfer oil station, a heat exchange station, a circulating water station, an on-site control room, a plant substation, initial rainwater tanks, a chemicals storage area, solvent unloading facilities, and plant-wide systems. Basic information of the construction unit: Name of the construction unit: Shenhua Yulin Energy Chemical Co., Ltd. Address: North Area of Qingshui Industrial Park, Yushen Industrial Zone, Yulin City, Shaanxi Province. On the morning of March 1st, the groundbreaking ceremony for **Energy Group Yulin Energy Chemical Co., Ltd.’s 50,000 tons per year polylactic acid demonstration project was held. The Inner Mongolia branch of China Chemical Engineering Third Construction Co., Ltd. was responsible for all the construction and installation work on this project, with a contract value of 295 million yuan and a contract duration of 12 months. The “10,000-ton per year coal-based polyglycolic acid” project carried out by Inner Mongolia Pujing Polymer Materials Technology Co., Ltd. is the first of its kind in China. Construction of this project began in July 2018 in the Jiuyuan Industrial Park in Baotou, Inner Mongolia. It is a key industrial project in Baotou and also constitutes an extension of the coal-based olefins industry chain. The polyglycolic acid is produced through 8 different processing steps, using coal-derived syngas supplied by Shenhua Baotou Coal Chemicals Co., Ltd. as raw material. The total investment in the project is 550 million yuan, which is primarily used to build a 1,000 t/a polylactic acid production facility, a 500 t/a catalyst workshop, a product research and development center, warehouses, control rooms, as well as supporting facilities such as irrigation systems and heat transfer oil furnace rooms.