Combined hydrogenation method

Abstract

The invention disclosed an associated hydrogenating technology. The invention is about deep hydrogenationg refinement of poor quality ship-coal by neo-hydrogen (such as cyclane radical or cyclane intermediate radical). The gas which is rich in hydrogen is used as the supplementary gas in hydrocracking process of diesel oil; the invention adopts hydrocracking method to treat poor quality diesel oil; the gas which is rich in hydrogen can be recycled. In the invention, the poor quality ship-coal contacts the neo-hydrogen first so as to get the high-quality ship-coal products; by hydrocracking the diesel oil, the producer can produce high quality diesel oil directly, as well as some high quality ship-coal and high arene naphtha. The invention can save the investment of devices and equipments; it also has the advantage of less hydrogen consumption, less energy expenditure, and small circulated hydrogen compressor volume.

Description

1. Technical field [0001] The invention discloses a combined hydrogenation process, in particular to a combined hydrogenation process for simultaneously producing high-quality jet fuel and diesel products from inferior AGO. 2. Background technology [0002] The world's oil resources are increasingly scarce, and the sustainable development of the economy requires a large amount of light fuels and petrochemical raw materials. The strict environmental protection regulations have put forward more stringent quality requirements for petroleum products, so the hydrotreating of petroleum raw materials and various distillates has become increasingly important. Various distillate oil hydrotreating technologies, such as gasoline hydrofinishing, diesel hydrofinishing, catalytic cracking raw material pretreatment, heavy residue hydrotreating, etc., have been developed rapidly. [0003] For atmospheric gas oil fractions (hereinafter referred to as AGO), generally the smoke point of the j...

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Problems solved by technology

[0006] The weak point of above-mentioned various methods is, can directly produce the product that meets the quality requirement when processing the better diesel oil of property, and when dealing with the low-quality diesel oil (such as naphthenic, naphthenic intermediate base crude oil) that aromatic hydrocarbon, cycloalkane content are high (straight-run diesel oil, catalytic cracking light cycle oil, etc.), even if the aromatics are fully saturated, the cetane number cannot meet the higher quality requirements of future environmental protection regulations, so the processed diesel products are usually used as refinery diesel oil blending components

For naphthenic AGO fractions, this method can only increase the cetane number of narrow-cut diesel oil, but for this wide-cut diesel product, the cetane number increase is only 10 units, and the aviation fuel fraction has also been increased. Hydrogen cracking, chemical hydrogen consumption is large

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