The 200,000-ton coal-to-ethylene glycol unit of Henan Yongcheng Longyu Coal Chemical Co., Ltd. has been operating at high load continuously for 180 days in October 2020 after using the hydrogenation catalyst provided by Jiangsu Jinju Alloy Materials Co., Ltd. Above, the current daily output is 630 tons, and the load reaches 105%.
While ensuring production capacity, the methyl glycolate in the hydrogenation catalyst reaction product is less than 0.04, 1,2-butanediol is less than 0.1, and the effective combination of methanol and ethylene glycol is It accounts for 99.3%, the conversion rate of dimethyl oxalate reaches 100%, and the yield of ethylene glycol product is above 99%. The quality of its products can 100% reach the polyester level, with light transmittances of 84/220nm, 97/275nm, and 100/350nm.
Since the start of the operation in October last year, the hydrogenation catalyst produced by Jiangsu Jinju Alloy Company has shown good catalytic activity, selectivity and stability. The pressure difference of the hydrogenation reactor has been stable at 28kpa, and the hot spot temperature has been maintained at 174°C. This reflects the excellent performance of the catalyst’s low-temperature reaction and high catalytic activity, and also provides safe, stable and high-quality long-term operation of the Yongcheng ethylene glycol unit. Provides strong protection.
In the operation of this device in Yongcheng Park: the time to get through the process is short, only one day; the quality of the first output product reaches the polyester level; the speed of ramping up to full load is fast , less than 1 month; the equipment was maintained in place and the inorganic pump was damaged; the consumption was low, with about 4.7 tons of steam consumed per ton of ethylene glycol and about 2338Nm3 of raw material gas (CO+H2) consumed; the first trial operation took a long time, a breakthrough In 100 days, the daily production of polyester-grade ethylene glycol reached 638 tons.
The excellent catalytic performance of the coal-to-ethylene glycol catalyst produced by Jiangsu Jinju Alloy Materials Co., Ltd. is used in various coal-to-ethylene glycol units of Tongliao Jinmei Chemical Industry and Henan Energy. All are reflected and play a very important role in the long-term, high-load, high-quality, safe and stable operation of production.
Project Overview
10, 2020 On March 31, the Henan Energy and Chemical Industry Group Yongcheng Park’s annual output of 200,000 tons of surplus syngas to ethylene glycol project was successfully put into operation and produced polyester-grade ethylene glycol at 23:35.
Henan Longyu Coal Chemical Co., Ltd. is a holding subsidiary of Henan Energy and Chemical Group Yongmei Company. The factory covers an area of 76.3 hectares. Yongcheng Park is one of the large-scale chemical parks focused on the development and construction of Henan Energy. Its main products include annual output of 500,000 tons of methanol, 200,000 tons of dimethyl ether, 400,000 tons of acetic acid and 200,000 tons of ethylene glycol projects.
Henan Longyu Coal Chemical Co., Ltd.’s surplus synthesis gas production ethylene glycol project with an annual output of 200,000 tons is located in the Yongcheng Industrial Cluster District. The project investment is 1 billion yuan and was completed in March 2018. Construction started on March 19, and the machinery was completed by the end of December 2019. The project will consume and squeeze out the 50,000 standard cubic meters of surplus syngas per hour in the park. After the annual production of 200,000 tons of surplus syngas to produce ethylene glycol is put into operation, the company’s ethylene glycol production capacity will reach 400,000 tons/year. </p
