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Research on Nitrogen Distribution in Products of Slurry-Bed Hydrocracking of Cracked Residues Recycle

WEN Ping，LI Chuan, LI Shu-feng，DENG Wen-an

Abstract （451）

PDF （152KB）（306）

Atmosphic residue of Karamay petrochemical complex was hydrocracked in the presence of 1 000 μg/g multrimetal dispersed cagalyst in slurry-bed under the reaction time of 1 h, reaction temperature of 440 ℃, the cracked residue was put back and mixed with the fresh feed for recycling. The ratios of cracked residue for recycling were 0, 15.0%, 20.0%, 25.0%. The reaction products was separate into IBP~180 ℃(Gasoline), 180~360 ℃(AGO), 360～500 ℃(VGO) and >500 ℃(Cracked residue). The basic nitrogen in each fraction was determined by non-aqueous potentiometric titration. The nitrogen was determined by boat-inlet using REN-1000A device. The basic nitrogen and total nitrogen in the product are mainly concentrated into VGO and cracked residue. Both basic nitrogen content and total nitrogen content increased with the increase of the ratio of cracked residue to feedstock. Only about 10% of the basic nitrogen and total nitrogen were in gasoline and AGO. The ratio of fraction basic nitrogen content to fraction total nitrogen content in VGO and cracked residue was about 30%, which was about 50%～70% in Gasoline and AGO. 

2012, 25 (3): 31-34. DOI: 10.3969/j.issn.1006-396X.2012.03.007

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Acid Oxygenated Compounds in Residue and Slurry-Bed Hydrocracking Cracked Residue

WEN Ping, LI Chuan, LI Shu-feng, DENG Wen-an

Abstract （693）

PDF （131KB）（345）

Karamay atmospheric residue（KLAR）was hydrocracked in pilot experimental device of state key laboratory of heavy oil processing, with the presence of an oil-soluble catalyst. Reaction time was set to 1 h and reaction catalyst concentration at 800 μg/g, reaction temperature were 410,430 and 450 ℃. Then KLAR and its slurry-bed hydrocracking cracked residue were separated into four fractions. The acid number in each fraction was determined. The distribution of the acid oxygenated compounds in each material was obtained. The results show that the acid oxygenated compounds in KLAR are mainly distributed in resin, which in slurry-bed hydrocracking cracked residue of KLAR are mainly distributed in resin and asphaltene. 

2011, 24 (6): 6-8. DOI: 10.3696/j.issn.1006-396X.2011.06.002

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Effect of Sulfuration Conditions on the Coke － Restraining Activity of Water Solubility Ni Catalyst

LIU Dong,ZHANG Shu-yi,CUI Wen-long,DENG Wen-an,et al

Abstract （984）

PDF （330KB）（551）

The existing state of dispersed Ni catalysts and its precursors for slurry bed hydrocracking of residues were symbolized using microscope，SEM，XRD and LS granularity analyzing apparatus． Then the composition and particle size
distribution of Ni catalysts at different sulfuration time were analyzed，and the coke － restraining activity of the catalyst was also studied．The results show that the structure of nickel sulfide catalyst changed with different sulfuration time，and the coke－restraining activity of the catalyst increased with the prolonged sulfuration time or the increased concentration．While the sulfuration time was longer than 3 h or the concentration of the catalyst was higher than 2000 μg／g ，the coke－restraining activity became steady．

2009, 22 (3): 42-45. DOI: 10.3696/j.issn.1006-396X.2009.03.011

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Reaction Conditions of Slurry-Bed Hydrocracking to Liaohe Residue

ZHANG Shu-yi, LUO hui, DENG Wen-an, LIU Dong, QUE Guo-he

Abstract （269）

PDF （1614KB）（570）

The Liaohe inferior residue was studied as object and the slurry-bed hydrocracking reaction to Liaohe residue was simulated by the autoclave reaction. The effects of oil-soluble dispersed Ni catalyst on residue conversion under different reaction conditions were investigated. The results show that for the oil-soluble dispersed Ni catalyst, the use of the sulfide agent is superior to without sulfide agent; sulfur is the best sulfide agent. The best reaction conditions for hydrocracking Liaohe residue using oil-soluble dispersed Ni catalyst are: oil-soluble catalyst concentration 300 μg/g, the initial hydrogen pressure of 7.0 MPa, reaction temperature is standard temperature (t+5 )℃, reaction time of 1 h.

2008, 21 (3): 57-59.

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Suspension Bed Hydrocracking of Atmospheric Residue From Dagang Oil Field

ZHANG Lei,MU Bao-quan, DENG Wen-an, QUE Guo-he

Abstract （350）

PDF （849KB）（305）

Suspension bed hydrocracking technology and water soluble catalyst were used for upgrading of atmospheric residue from Dagang oil field. The relations among metal composition of the catalyst, reaction conditions, coke forming and conversion were systematically investigated. After optimization, the yields of AGO and VGO are 21.2% and 47.7% respectively from processing atmospheric residue under the condition of 430 ℃, 1.0 h-1 space velocity, 7 MPa and catalyst addition amount with 300 μg/g in once through operation, toluene insolubles yield level of 1.4%, a total conversion of AR which has a boiling point lower than 524 ℃ can reach above 80%.The constitutes of catalyst and reaction temperature are the main factors which affect the conversion of materials and coke formation, the conversion of materials and coke formation increase with the extend of reaction time, the conversion has little change and the trend of coke formation decreases with the increase of reaction pressure. The recycling can improve the conversion of residue but the degree is too small.

2007, 20 (1): 52-55.