Hydrocracking method of low-energy-consumption, productive and high-quality jet fuel

Abstract

The invention discloses a hydrocracking method of low-energy-consumption, productive and high-quality jet fuel. The hydrocracking method comprises the steps that after being mixed with hydrogen, raw oil undergoes heat exchange twice, passes through hydrofining and first cracking reaction zones in sequence after passing through a heating furnace and is separated to obtain middle distillate, and the middle distillate enters a second cracking reaction zone to be cracked, wherein the first cracking reaction zone at least comprises two cracking catalysts, namely an upstream filling catalyst I and a downstream filling catalyst II; the catalyst I contains 15-50wt% of modified Y molecular sieve; the catalyst II contains 3-30wt% of modified Y molecular sieve; the content of the modified Y molecular sieve in the catalyst I is higher than the content of the modified Y molecular sieve in the catalyst II by 10-25%. The hydrocracking method has the advantages that the high temperature and high pressure countercurrent heat transfer technology and the hydrocracking catalyst grading technology are organically combined and the hydrocracking reaction heat is comprehensively utilized, thus improving the quality of the target product and reducing the project investment and the operation energy consumption while maintaining the selectivity of the catalysts.

Description

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AI Technical Summary

Benefits of technology

This patented technical solution described in this patents allows for efficient production of high purity liquid jet fuels from low cost materials such as coal. These new methods involve combining both thermal decomposition techniques together with specific chemical reactors that work under special circumstances like water vapor explosion. They aim to achieve these benefits while minimizing capital expenses and operational costs associated therewith.

Problems solved by technology

Technologies aim at reducing both capital expenditure and operational complexity while improving production efficiency without compromising quality control standards. One solution involves developing a combination of different techniques such as hydrocracker/fractal fluid bed reactors, intermediate separation units like cyclones, and final products including naphtha and dieselfish liquids. These combinations help optimize the overall economic impact of crude oils and upgrade them towards better value added chemical feedstocks.

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