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Feng Y.-K.,Shandong Haicheng Petrochemical Engineering Design Co. | Zhang J.-B.,Shandong Haicheng Petrochemical Engineering Design Co. | Liu J.-L.,Shandong Haicheng Petrochemical Engineering Design Co. | Ma Y.-L.,Shandong Haicheng Petrochemical Engineering Design Co.
Xiandai Huagong/Modern Chemical Industry | Year: 2015

High-temperature hydrogenation and purification process for liquefied petroleum gas is introduced in this paper. During high temperature hydrogenation, olefins in raw material are converted to alkanes. Sulfide, nitride, oxide and halide are converted to hydrogen sulfide, water, ammonia and hydrogen halide, respectively, which are then removed by using the method of alkaline cleaning and meet the requirement of platinum catalyst. The main advantages of this process are shorter process, less investment, lower cost and less solid waste. ©, 2015, Xiandai Huagong/Modern Chemical Industry. All right reserved.


Feng Y.-K.,Shandong Haicheng Petrochemical Engineering Design Co. | Sun Y.-J.,Shandong Haicheng Petrochemical Engineering Design Co. | Zhang J.-B.,Shandong Haicheng Petrochemical Engineering Design Co. | Zhang M.,Shandong Haicheng Petrochemical Engineering Design Co. | And 2 more authors.
Xiandai Huagong/Modern Chemical Industry | Year: 2014

Triple-paralleled-tower separation system process and technical characteristic are introduced. The products at the outlet of the reaction vessel undergo three times of gas-liquid separation with different temperatures and pressures. The liquid phases enter the absorption-desorption tower, the stabilization tower and the distillation tower, respectively. The feed lines of the three towers are connected in parallel, and a kettle of the distillation tower is used for heating the products. Triple-paralleled-tower separation system forms the separation technology with an interlaced design in parallel and series. Compared with triple-series-tower, it has the advantages including lower energy consumption, less investment, less heat source types, higher product yield, and so on. ©, 2014, China National Chemical Information Center. All right reserved.


Guo A.-J.,China University of Petroleum - East China | Lin X.-Q.,China University of Petroleum - East China | Lin X.-Q.,Shandong Haicheng Petrochemical Engineering Design Ltd Company | Wang Y.-Y.,China University of Petroleum - East China | Wang Z.-X.,China University of Petroleum - East China
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | Year: 2012

Using optical structure analysis as the main characterization methods, the course of shot coke formation and the effects of feedstock properties and operating conditions were investigated in a small scale experiment equipment. After analysis of reasons for shot coke formation, the corresponding suppression measures were suggested. The results show that the course of shot coke formation can be expressed as feedstock → unstable spheres of mesophase → mosaic mesophase → shot coke. When the ratio of asphaltene to carbon residue is higher than 0.5, the atomic ratio of H/C is below 1.5 and the colloidal stability parameter is less than 3.5, the shot coke is easily formed. Various circulation fractions play different roles in inhibition of shot coke formation. When using heavy coker gas oil (HCGO) (420~500°C) as circulating fraction the best effect is obtained. The shot coke formation can be inhibited by optimizing process parameters like adoption of lower temperature, higher pressure, higher recycle ratio and adding tetrahydronaphthalene or fluid catalytic cracking (FCC) slurry to the reaction system.

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