Catalytic cracking diesel fuel hydroconversion method

A technology for catalytic cracking of diesel oil and hydroconversion, which is applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of accelerated carbon deposition rate of catalyst, poor quality of diesel products, affecting long-term operation, etc. Further cracking, shorter contact time, reduced effect of hydrogenation

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

But at present, there are also some problems in the existing technology. The main purpose of high aromatics diesel conversion technology is to convert high aromatics diesel into high octane gasoline components. At the same time, reduce the sulfur content of diesel and improve the cetane number of diesel, gasoline There is a contradiction between the hydrogenation of diesel components and diesel components. When the hydrogenation capacity

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  • Catalytic cracking diesel fuel hydroconversion method
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Examples

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Effect test

Embodiment 1-3

[0035] Embodiment 1-3 adopts flow process of the present invention as figure 1 .

[0036] Embodiment 1-3 In the hydrocracking reactor, three kinds of cracking catalysts of catalyst A, catalyst B and catalyst C in Table 1 are graded and loaded respectively according to the order of the catalyst bed from top to bottom. In the three examples, catalyst A The ratios of Catalyst B and Catalyst C are 1:1:1; 1:2:1 and 1:1:2, respectively.

[0037] The composition and properties of the catalyst are shown in Table 1, the properties of the raw materials used are shown in Table 2, and the reaction conditions and reaction results of Examples 1 to 3 are shown in Table 3 and Table 4 below.

Embodiment 4

[0039] use figure 2 process shown. Feedstock oil, and catalyst used are the same as embodiment 3. Wherein a gas extraction pipeline is set between the second and third cracking catalyst beds, and the others are the same as in Embodiment 3. The amount of gas phase material drawn from the gas phase extraction pipeline is 30% of the amount of circulating hydrogen.

[0040] Table 1 Composition and main properties of the cracking catalyst of the example.

[0041] project Catalyst A Catalyst B Catalyst C Chemical composition, mass% NiO 8 5 3 WO 3 24 20 18 carrier Aluminum oxide Aluminum oxide Aluminum oxide cracking components Y molecular sieve Y molecular sieve Y molecular sieve Cracking component content in the carrier, m% 80 70 60 Cracking catalyst average pore size, nm 5.0 7.0 9.0

[0042] Table 2 Raw oil properties.

[0043] Raw oil catalytic diesel Density, g / cm 3 0...

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Abstract

The present invention discloses a catalytic cracking diesel fuel hydroconversion method. According to the method, catalytic diesel fuel and hydrogen are mixed and then enter a hydrorefining reactor to carry out a hydrorefining reaction; the hydrorefining reaction effluent directly enters a hydrocracking reactor and then is subjected to a contact reaction with the grading catalyst bed layer inside the hydrocracking reactor, wherein at least two cracking catalyst bed layers are arranged inside the hydrocracking reactor, and the hydrogenation activity of the hydrocracking catalyst presents the decrease tendency according to the reaction material flowing direction; and the hydrocracking reaction effluent is subjected to separation and fractionation to obtain the naphtha and the diesel fuel. With the method of the present invention, the diesel fuel hydrocracking effect can be ensured while the excessive hydrogenation and the secondary cracking of the naphtha can be reduced and the chemical hydrogen consumption can be reduced so as to increase the octane number and the liquid yield of the naphtha.

Description

technical field [0001] The invention relates to a method for hydrogenation treatment of hydrocarbons, in particular to a method for hydrogenation conversion of catalytic cracking diesel oil. Background technique [0002] Since the beginning of the new century, with the increasing awareness of environmental protection, the stricter national environmental protection regulations and the rapid development of the national economy, the demand for clean motor fuels has been increasing all over the world. Catalytic cracking (FCC) technology is one of the main technological means for lightening heavy oil, and it occupies a relatively important position in oil refining enterprises all over the world. The annual processing capacity of catalytic cracking units in my country has exceeded 100 million tons, second only to the United States. In the composition of gasoline and diesel products, catalytic cracking gasoline accounts for about 80%, and catalytic diesel oil accounts for about 30...

Claims

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Application Information

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IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/305C10G2400/02
Inventor 柳伟杜艳泽王凤来刘昶秦波张晓萍
Owner CHINA PETROLEUM & CHEM CORP
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