On January 29, a signing ceremony was held in Chengdu to finalize the contract for the licensing of two invention patent technologies and engineering designs between the Southwest Research and Design Institute of Chemical Engineering and Sichuan Tianyi Science and Technology Co., Ltd. This agreement also covers the construction of a 400,000-ton-per-year dimethyl ether (DME) industrial plant by Ningxia Baota Group. The facility is currently the world’s largest gas-phase DME production unit, marking a significant technological breakthrough for China in the field of clean energy and chemical production.
According to reports, the Baota Group has conducted extensive research on DME technology and market trends both domestically and internationally, engaging in discussions with renowned research institutions. After thorough evaluation, they chose the Southwest Research and Design Institute and Tianke Group due to their advanced, reliable, and mature technologies. The project is expected to invest 120 million yuan and be operational by the end of 2008.
The plant will employ a methanol gas-phase catalytic dehydration process, featuring a unique vaporization decanter structure and a simplified separation process. This design is projected to reduce investment by 30% and significantly lower energy consumption. Specifically, steam usage per ton of product will be 0.5 tons less than that of similar domestic and international units. Additionally, the use of self-developed catalysts will achieve a methanol-to-DME selectivity of over 99.5%, nearly eliminating exhaust emissions and reducing methanol consumption per ton of product.
Over a decade ago, the Southwest Institute pioneered the construction of several gas-phase methanol-dehydration-based DME plants, including kiloton-scale and 10,000-ton-scale facilities for fuel-grade DME at companies like Guangdong Zhongshan Fine Chemicals. Today, the institute and Tianke Group have successfully implemented more than 40 DME production units globally. All these projects meet or exceed design specifications, with DME content ranging from 99% to 99.9% and a product yield as high as 98%. This achievement highlights the maturity and efficiency of the technology, reinforcing China's growing role in the global DME industry.
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