Last week came from Shandong Heze Jade Emperor Chemical Co., Ltd., the world’s first 200,000-ton/year styrene combined plant built with ethanol ethylbenzene technology has been running smoothly for 4 months, and 110% of the load is running close to 1 Months. This technology has opened up a competitive new process route for styrene production. The results showed that the production of xylene was less than 800×10-6. At the same time, the amount of ethylbenzene tar and tail gas was small, and the equipment consumption was lower than that of pure ethylene vapor-phase ethylbenzene.
This device adopts the low-energy styrene patented technology developed by Jiangsu Changzhou Ruihua Chemical Engineering Technology Co., Ltd., and the ethanol ethylbenzene technology developed by Jiangsu Shangyuan Science and Technology Co., Ltd., and China Petroleum Engineering Design Co., Ltd. is responsible for the overall engineering design.
The ethylbenzene unit of the plant uses ethanol as a raw material to replace the traditional ethylene raw materials. The reaction process is coupled with an ethanol dehydration reaction and a benzene alkylation reaction, and has a low reaction temperature (360° C. to 380° C.), a low reaction heat effect, and a bed layer. Low temperature rise, high selectivity to ethylbenzene, and low production of polyethylbenzene. The catalyst uses a water-resistant catalyst developed by Dalian University of Technology to ensure the high performance and long life of the catalyst under high partial pressure of steam. The styrene unit adopts a low-water ratio energy-saving process and is an independent technology for the first industrial application. The designed water ratio is 1.2~1.35, the design pressure of the reactor system is 54~38kPa, the conversion rate is 64%, and the selectivity is 97%. In order to ensure the reliability of the reactor system, a patented reactor, a patented reheater, and a patented triple heat exchanger are used in the design. Under full load, the actual production data is much better than the design data. At the reaction temperature of 610°C to 615°C and the actual pressure of the reaction system at 50 to 38 kPa, the reaction conversion rate reaches 68%, and the selectivity is 97.0%. The dehydrogenation liquid styrene The content reaches 65%.
In addition, a number of new technologies are used in the process package, including ultra-low resistance premixer and static mixer technology, new chilling process and online removable chiller, negative pressure azeotropic evaporation technology, low temperature absorption Regeneration system, fully negative pressure separation and separation system, stripping tar styrene recovery process, etc.
This device adopts the low-energy styrene patented technology developed by Jiangsu Changzhou Ruihua Chemical Engineering Technology Co., Ltd., and the ethanol ethylbenzene technology developed by Jiangsu Shangyuan Science and Technology Co., Ltd., and China Petroleum Engineering Design Co., Ltd. is responsible for the overall engineering design.
The ethylbenzene unit of the plant uses ethanol as a raw material to replace the traditional ethylene raw materials. The reaction process is coupled with an ethanol dehydration reaction and a benzene alkylation reaction, and has a low reaction temperature (360° C. to 380° C.), a low reaction heat effect, and a bed layer. Low temperature rise, high selectivity to ethylbenzene, and low production of polyethylbenzene. The catalyst uses a water-resistant catalyst developed by Dalian University of Technology to ensure the high performance and long life of the catalyst under high partial pressure of steam. The styrene unit adopts a low-water ratio energy-saving process and is an independent technology for the first industrial application. The designed water ratio is 1.2~1.35, the design pressure of the reactor system is 54~38kPa, the conversion rate is 64%, and the selectivity is 97%. In order to ensure the reliability of the reactor system, a patented reactor, a patented reheater, and a patented triple heat exchanger are used in the design. Under full load, the actual production data is much better than the design data. At the reaction temperature of 610°C to 615°C and the actual pressure of the reaction system at 50 to 38 kPa, the reaction conversion rate reaches 68%, and the selectivity is 97.0%. The dehydrogenation liquid styrene The content reaches 65%.
In addition, a number of new technologies are used in the process package, including ultra-low resistance premixer and static mixer technology, new chilling process and online removable chiller, negative pressure azeotropic evaporation technology, low temperature absorption Regeneration system, fully negative pressure separation and separation system, stripping tar styrene recovery process, etc.
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