【Haichuan Chemical Salary News】Review of the basic engineering design for China’s first 100,000-ton DMC project at Hainan Huasheng
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The design review for the foundation works of China’s first 100,000-ton DMC project was held from April 20th to 30th. The design review meeting for the foundation works, as well as a project coordination meeting, for the 240,000-ton/year bisphenol A production unit and the 100,000-ton/year DMC production unit in Hainan Huasheng’s 2×260,000-ton/year polycarbonate project (Phase I), were successfully conducted at Donghua Technology. Ji Xiangyang, deputy general manager of Hainan Huasheng New Materials Technology Co., Ltd., Zhu Dinghua, member of the Party Committee and deputy general manager of Donghua Technology, Zhao Lei, deputy director of the Project Management Department, and members of the project team attended the meeting.
Hainan Huasheng New Materials Technology Co., Ltd.’s 2×260,000 tons/year polycarbonate project using a non-phosgene process is located in the Dongfang City Industrial Park, covering a total area of 66.14 hectares, with Phase I occupying approximately 58.28 hectares. The construction scope of the first phase mainly includes the construction of a polycarbonate (PC) production facility with an annual capacity of 260,000 tons, and a diphenyl carbonate (DPC) production facility with an annual capacity of 224,000 tons. It also involves the construction of associated facilities such as storage tank areas, heat transfer station, sewage treatment plants, incinerators for waste gases and liquids, and warehouses for hazardous chemicals. The project utilizes the two-step urea method developed by East China University of Science and Technology for the synthesis of dimethyl carbonate. This method uses urea and propylene glycol, which is a by-product of the conventional DMC esterification process, as raw materials. First, urea and propylene glycol are combined to form an intermediate substance, propylene carbonate; this propylene carbonate is then subjected to an ester exchange reaction with methanol to produce DMC. The propylene glycol produced as a by-product is recycled back to be used together with urea to synthesize more propylene carbonate. Once the DMC plant is operational, it will provide a stable source of raw materials for subsequent PC (polycarbonate) plants, thereby **reducing raw material costs** ； The project enables material and heat coupling between the DMC unit and the PC unit, significantly reducing overall utility consumption.