Hydro-upgrading method for diesel distillate
A technology for hydrogenation, upgrading and fractionation, which is applied in refining to remove heteroatoms, etc., can solve the problems of complex process, limited improvement of cetane number, and difficult operation, and achieves simple device process, large production flexibility, Easy-to-operate effects
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Embodiment approach
[0040] According to a preferred embodiment of the present invention, the method for hydro-upgrading the diesel fraction can be figure 1 The method shown is carried out. Such as figure 1 As shown, the diesel fraction 1 with a total aromatic content of not less than 35% by weight passes through the feed oil pump 3, and is counted as 11 after being preheated, mixed with hydrogen-rich gas 20, 22, and enters the first reactor 5, and sequentially with the first hydrorefining catalyst The second hydrorefining catalyst is contacted with the hydro-upgrading catalyst to carry out deep desulfurization, denitrification, dearomatization and cetane number improvement reactions to obtain the contacted product 12, the total aromatic content of the contacted product is low 于35wt%. The diesel fraction 2 with a total aromatic content of less than 35% by weight passes through the feed oil pump 4, and is counted as 13 after preheating, mixed with the contact product 12, that is, the effluent 12 of...
Embodiment 1
[0045] This example is used to illustrate the method for hydro-upgrading diesel fraction provided by the present invention.
[0046] The feedstock oil C, which accounts for 54.5% by weight of the total feed, is in contact with hydrogen-rich gas (hydrogen content of 80% by volume), enters the first reactor after being preheated by the heating furnace, and is sequentially connected with the first hydrorefining catalyst H (the first In a reactor, 20% by volume of the second hydrorefining catalyst J), the second hydrorefining catalyst J, and the hydrorefining catalyst M are contacted, and the volume ratio of the second hydrorefining catalyst J to the hydrorefining catalyst M is 4:1. Feedstock oil A, which accounts for 15.5% by weight of the total feed, and feedstock oil B, which accounts for 30% by weight of the total feed, are mixed and preheated in a heating furnace, and then mixed with the effluent from the first reactor to enter the second reactor, followed by The first hydroref...
Embodiment 2
[0048] This example is used to illustrate the method for hydro-upgrading diesel fraction provided by the present invention.
[0049] The feedstock oil C, which accounts for 75% by weight of the total feed, is in contact with hydrogen-rich gas (hydrogen content of 60% by volume), enters the first reactor after being preheated by the heating furnace, and is sequentially connected with the first hydrorefining catalyst I (the first In a reactor, 10% by volume of the second hydrorefining catalyst J), the second hydrorefining catalyst K, and the hydrorefining catalyst N are contacted, and the volume ratio of the second hydrorefining catalyst K to the hydrorefining catalyst N is 2:1. 25% by weight of the total feed amount, the feedstock oil B and hydrogen-rich gas are mixed and preheated by a heating furnace, and then mixed with the effluent from the first reactor to enter the second reactor, and in turn with the first hydrorefining catalyst I (the first 15% by volume of the second hyd...
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Abstract
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