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The use of China's relatively productive coal resources to replace the current petroleum route to produce ethylene glycol has high economic benefits and meets China's resource reality. In 1982, the Institute of Physical Structure Research of the Chinese Academy of Sciences began researching the new process of CO gas-phase catalytic synthesis of oxalate and oxalate hydrolysis to produce oxalic acid and oxalic acid ester hydrogenation to ethylene glycol, and obtained a series of proprietary patents and catalysts. technology. Based on this, in 2005, the institute re-established the coal-to-ethylene glycol technology research group and concentrated its technical forces on further collaborative research to carry out CO gas-phase catalytic synthesis of oxalate and oxalate to prepare oxalic acid and ethylene glycol. The test of conditions. In 2006, the company joined Shanghai Jinmei Chemical New Technology Co., Ltd. to begin industrial trials with an annual output of 300 tons of dimethyl oxalate and 100 tons of ethylene glycol per year, and 10,000 tons of coal-to-ethylene glycol. In June 2008, the project team completed all the test work and achieved the expected technical indicators. On March 18, 2009, the 10,000-ton coal-to-ethylene glycol process technology passed the technical appraisal organized by the Chinese Academy of Sciences.
Based on the 10,000-ton industrial test technology, starting from August 2007, the project team began construction of a 1.2 million-ton/year coal-based glycol production base in Tongliao, Inner Mongolia, and the first phase of 200,000 tons/year of coal-based glycol. The industrial demonstration unit was supported by the Ministry of Science and Technology's 2009 key technology support project; in October 2009, all project construction plans were completed; on December 7, 2009, the entire process was opened.
Ethylene glycol is an important chemical raw material for the production of polyester chips and refrigerants. Currently, it is generally produced on the oil route in the world. The production process consumes large amounts of water, consumes large amounts of energy, and costs high. Moreover, key technologies are in the hands of foreign manufacturers. The annual demand for ethylene glycol in China has reached more than 7 million tons. Due to low production capacity, the annual import volume in recent years reached 5 million tons. For more than 40 years, researchers at home and abroad have been working hard to develop coal-to-ethylene glycol technology. The development of coal-to-oil instead of oil-producing ethylene glycol technology was listed in the national key scientific and technological projects as early as the 1990s.
China takes the lead in realizing the industrialization of coal to ethylene glycol
The world's first 200,000-ton/year coal-to-ethylene glycol industrial demonstration project initiated by the Fujian Institute of Materials Science and Technology of the Chinese Academy of Sciences in cooperation with Jiangsu Danhua Group Co., Ltd. and Shanghai Jincai Chemical New Technology Co., Ltd., and launched on December 7th. The process completed a one-week trial run on December 14 and successfully produced qualified ethylene glycol products. The move marks the first time in the world that China has realized the industrial application of coal-to-ethylene glycol technology.