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The air separation unit for the Neimenggu Rongxin project operated by Hualu Engineering Technology Co., Ltd. was successfully put into operation. Author/Source: Coal Chemical Industry 114 Forum Date: October 29, 2019 Clicks: 10 On October 24, 2019, the air separation unit for the Neimenggu Rongxin project managed by Hualu Engineering Technology Co., Ltd. was successfully commissioned, producing oxygen of qualified quality with all operational parameters within normal ranges. The air separation unit is located upstream in the process flow, and it plays a crucial role by supplying oxygen and nitrogen for the entire Phase II project of Rongxin Chemical. The Inner Mongolia Rongxin project team of the company faced challenges head-on, managed things with care, and organized work in a scientific manner. Various departments responsible for design, procurement, construction, etc., worked hard, collaborated closely, and committed themselves fully to ensuring the successful achievement of this important milestone – the production of oxygen through air separation. The air separation unit utilizes two sets of technology from Air Liquide France, and boasts advantages such as automatic load adjustment, long service life, low energy consumption, and high oxygen extraction efficiency. Each set has an oxygen production capacity of 92,000 Nm3/h; it supplies 86,000 Nm3/h of high-pressure oxygen, 6,000 Nm3/h of low-pressure oxygen, and 25,000 Nm3/h of low-pressure nitrogen to downstream processes. Additionally, it produces 2,000 Nm3/h of liquid nitrogen and 2,700 Nm3/h of liquid argon as by-products. The successful oxygen production by the air separation unit has paved the way for the completion of the entire process in Rongxin Chemical’s Phase II project, laying a solid foundation for the production of the final product. The 400,000-ton coal-to-ethylene glycol and 300,000-ton polyoxymethylenemethane circular economy demonstration project of Inner Mongolia Rongxin Chemical Co., Ltd. is located in the Sanyangliang Industrial Park in Dalaat Banner, Inner Mongolia Autonomous Region. It represents a major project undertaken by the company to extend its industrial chain and promote the clean utilization of coal, building on its initial 900,000-ton coal-to-methanol project. Ultimately, a coal-to-methanol production capacity of 5 million tons per year will be established, along with a demonstration base for a range of downstream fine chemical products derived from coal processing, thereby creating a new benchmark for coal conversion and industrial upgrading. The total investment in the project is 7.68 billion yuan, and construction began in August 2017. The project uses coal as raw material and the four-nozzle gasification technology from East China University of Science and Technology to produce CO and H2 required for ethylene glycol production, as well as syngas needed for methanol synthesis. Ethylene glycol is synthesized via an indirect method, while DMMn is synthesized indirectly from methanol.