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Research on Separating Technique of FCC Slurry

Author: DongYanLi
Tutor: WangYanZhen
School: China University of Petroleum
Course: Chemical Engineering and Technology
Keywords: Catalytic Slurry Oil Additives Solvent refined Catalyst Separate
CLC: TE624.41
Type: Master's thesis
Year: 2011
Downloads: 117
Quote: 0
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Abstract


Light fuel oil demand in China is rapidly growing, at the same time, the wear and tear of heavy crude oil as well as a catalyst to bring FCCU coking, scaling and other adverse effects, serious impact on the quality of the product and the product's distribution, and not due to slurry oil rational utilization, resulting in a great waste. So the research component of the catalyst particles in catalytic slurry oil removal process as well as the catalytic slurry oil separation and reasonable utilization has important practical significance. In this thesis selected the Wintek catalytic slurry oil, the Lanzhou Petrochemical catalytic slurry oil as the research object, the main use of chemical sedimentation additives to reduce the content of the catalyst particles in the slurry oil, to determine the removal process, and the removal mechanism is discussed; proposed to furfural as solvent extraction, FCC slurry view of the production of environmentally friendly rubber filled with oil and FCC feedstocks, single-stage, multi-level, cross-flow extraction experiments, and the multi-stage countercurrent extraction experiments investigated the extraction temperature, extraction oil ratio and extraction the impact of the series. Sedimentation aids filter, if the choice of the aqueous solution of polyacrylamide as a sedimentation aid, polyacrylic amide added in an amount of 250μg / g, 30min, the removal ratio of the catalyst was 87.5% at 80 ℃ deposition; if the choice of the volume fraction of 50% aqueous solution of glycerin as a sedimentation aid, added in an amount of 60% of the total amount of the slurry oil and to subsidence 30min at 80 ℃ recycled glycerin aqueous solution three times, the removal of the catalyst is still more than 80%; if the choice of the LAL-2 as a sedimentation aid, when added in an amount of 200μg / g, when At 80 ℃ sedimentation 24h, the removal ratio of the catalyst was 95.2%. Preliminary view that the settlement agent chosen in this experiment removal of the catalyst particles is mainly related to the settlement the auxiliaries itself viscosity and molecular structure. The slurry oil after removing the catalyst particles furfural extraction and back-extraction methods were used to further components of the slurry oil separation, separation of polycyclic aromatic hydrocarbons in the slurry oil saturated hydrocarbons. The best conditions for the the crossflow extraction and countercurrent extraction two experimental program to determine the single-stage cross-flow extraction experiments: extraction temperature of 50 ° C, catalyst to oil ratio was 2.5:1;, depending on the nature of the feedstock oil extraction process series for two optimal; back-extraction process stages for the three best. Saturated hydrocarbons obtained through extraction separation can be used as the feedstock of FCC. Cracking, can also be used as the use of environmentally friendly rubber oil; PAHs due to the low performance of the cracking can be used as a rubber extender oil or for other purposes. FCC slurry so can not directly cycle but the first solvent extraction isolated easy cracking component and difficult to cracking component, easily cracking component returns FCC difficult cracking component as other uses, this can reduce the catalytic cracking of coke improve the catalytic cracking of liquid yield.

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The refining process > Catalytic converter > Catalytic cracking
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