International leader in medium and low temperature coal tar to aromatics technology

　　On June 13, the Shaanxi Petroleum and Chemical Industry Federation organized the scientific and technological achievements of "Development and Industrial Application of Complete Technology of Coal Tar to Aromatics Based on Ebullated Bed Hydrogenation" in Yulin in an online + offline manner.
appraisal meeting
.
The appraisal committee headed by Xu Chunming, an academician of the Chinese Academy of Sciences and a professor of China University of Petroleum (Beijing), agreed that this technology breaks the monopoly of foreign countries on ebullated bed hydrogenation technology, and the medium and low temperature coal tar hydrogenation technology based on ebullated bed technology ranks in the world.
leading level
.

　　The achievement was jointly developed by Shaanxi Jingyi Chemical Co.
, Ltd.
, Sinopec Dalian Petrochemical Research Institute, Sinopec Guangzhou Engineering Company, and Shaanxi Yulin Energy Group Co.
, Ltd.
, and it was carried out in laboratory small test, pilot test and 50,000 tons/year heavy oil ebullated bed On the basis of the hydrogen industrialization test, an industrial demonstration has been completed, and a complete set of coal tar-to-aromatics technology with completely independent intellectual property rights has been successfully developed
.

The picture shows the 500,000 tons/year coal tar deep processing polygeneration comprehensive utilization device of Jingyi Chemical
.
(Photo courtesy of the company)

　　Li Bin, deputy general manager of Shaanxi Jingyi Chemical Company, introduced that the technology gives full play to the high potential content of aromatics in coal-based naphtha, and integrates fixed-bed hydrocracking, continuous reforming, and aromatics extraction processes on the basis of fluidized bed hydrogenation
.
This combined process results in a high throughput, high liquid yield, high naphtha yield ebullated bed hydrogenation technology for coal tar
.
The main key technologies include coal tar pretreatment and purification, full fraction coal tar ebullated bed hydrogenation, fixed bed coal tar hydrorefining and hydrocracking, coal-based naphtha ultra-low pressure continuous reforming and extraction technology
.
The low-energy-consumption and environment-friendly multi-effect pretreatment process of coal tar innovatively developed by the team realizes the low-energy consumption purification pretreatment of medium and low temperature coal tar without adding chemicals, and the sodium chloride of coal tar after treatment is less than 3 mg/ liters, the water content is less than 0.
5%
.

　　In July 2020, the 500,000-ton/year coal tar deep processing polygeneration comprehensive utilization project was completed and put into operation in Shaanxi Jingyi Chemical Company, a subsidiary of Shaanxi Yulin Energy Group Company, and opened up the whole process
.
The unit uses full-cut medium and low temperature coal tar as raw material to produce aromatics, light oil and other products, and realizes the first industrial application of domestic fluidized bed hydrogenation technology in the field of coal tar deep processing, making coal tar change from traditional fuel to high value-added aromatics.
Product transformation promotes the high-end and diversified development of the coal chemical industry
.

　　"After the plant was put into operation, we have carried out a number of scientific and technological breakthroughs, innovating in anti-coking, anti-chlorine corrosion, pretreatment and other aspects to achieve safe, stable and efficient operation of the plant
.
" Chang Yi, chairman of Jingyi Chemical Company, said
.

　　The results of the previous 72-hour assessment and calibration show that the coal tar hydrogenation liquid yield of the unit is 91.
65%, the yield of aromatics products is 71.
26%, the overall hydrogen consumption per ton of oil to aromatics from coal tar is 642.
65 standard cubic meters, and the energy conversion efficiency is 82.
29%
.