Method of hydro up grading isomerizing pour point depression to produce diesel oil
A technology for isomeric pour point depressurization and hydrogenation modification, which is applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of inability to comprehensively improve the performance indicators of diesel oil, inability to effectively reduce the freezing point of diesel oil, and reduction of diesel product yield, etc. The effect of strong catalyst adaptability, lower aromatic content and lower cost
Active Publication Date: 2006-01-11
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0003] CN1171430A has introduced a kind of method that adopts medium pressure hydrocracking, although the cetane number of diesel oil can be greatly improved, because a considerable part of diesel oil is converted into naphtha fraction, diesel product yield is reduced, and this and The current market demand for increasing the diesel-to-gasoline ratio is contradictory, so its promotion and application are limited
CN1156752A discloses a diesel oil upgrading process, using a hydrocracking catalyst, under the condition of controlling a certain amount of nitrogen, the aromatic hydrocarbons in the diesel oil undergo a ring-opening reaction, which can greatly increase the cetane number of the diesel oil, but cannot effectively reduce the diesel oil. Solidifying point
[0005] In summary, none of the existing technologies can comprehensively improve various performance indicators of diesel and simply produce high-quality clean diesel
Method used
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Experimental program
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Effect test
Embodiment 2
[0025] In embodiment 2, catalyst replaces (the zeolite content of the zeolite catalyst containing β involved in the US5011593 embodiment) with the catalyzer that contains β zeolite 32wt%, other is identical with embodiment 2, test result is shown in Table 6, can find out from the data in the table , the use of a hydrotreating catalyst with a high zeolite content will greatly reduce the yield of diesel oil, and some performance indicators of diesel oil will also decrease. In addition, because more light hydrocarbons are produced by cracking, the hydrogen consumption will inevitably increase.
[0026] Process conditions
[0027] Response result
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A process for preparing the clean diesel oil by hydromodifying, isomerizing and lowering pour point features that the fractional oil raw material and H2 pass through a catalyst bed to obtain clean high-quality diesel and the naphtha product with low contents of sulfur and nitrogen and high content of arylhydrocarbon. Said catalyst bed contains hydrocatalyst bed containing beta zeolite (0.5-20 wt.%).
Description
technical field [0001] The invention relates to a method for producing diesel oil through hydrogenation modification, isomerization and decondensation. A catalyst with strong isomerization function is selected, and distillate oil is used to produce decondensed diesel oil. Background technique [0002] The sustained development of the national economy has led to the rapid development of the automobile industry and the transportation industry, especially the faster growth of diesel vehicles, which has also brought about the problem of air pollution caused by vehicle exhaust emissions. In order to effectively control vehicle exhaust emissions and protect the ecological environment on which human beings depend, countries all over the world, especially developed countries, have continuously improved automobile engines and their exhaust gas treatment systems, and at the same time have put forward higher and higher requirements for the quality of diesel products. Requirements, the ...
Claims
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IPC IPC(8): C10G45/00
Inventor 关明华李扬王凤来刘继华王震牛世坤
Owner CHINA PETROLEUM & CHEM CORP
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