A Catalytic Diesel Hydrogenation Conversion Process

Abstract

The invention discloses a hydro-conversion technology for catalytic diesel oil. The technology comprises the following steps: firstly, putting a mixture of catalytic diesel oil and hydrogen into a hydrogenation reactor and performing hydrofining reaction, and then guiding into a cracking reactor and generating contact reaction with hydrocracking catalyst layers, wherein upper and lower catalyst layers are arranged in the hydrocracking reactor; the hydrocracking catalyst in the upper layer has the properties as follows: on the basis of the total weight of the catalyst, 10%-18% of MoO3, 2%-10% of Co, 40%-90% of modified Y-shaped molecular sieve, preferably 50-80%, and the balance of aluminum silicon carrier; the hydrocracking catalyst in the lower layer has the properties as follows: on the basis of the total weight of the catalyst, 15-30% of MoO3 or WO3, 2-15% of NiO, 10%-60% of modified Y-shaped molecular sieve, preferably 20-40%; the filling mass ratio of the hydrocracking catalysts in the upper layer and the lower layer is (1:5)-(5:1). The hydro-conversion technology disclosed by the invention can further increase the device liquid yield, can reduce the hydrogenation saturation of the generated gasoline component and can increase the octane value of the gasoline component under the condition of better meeting the requirement for the conversion rate of catalytic diesel oil.

Description

technical field [0001] The invention relates to a hydrocarbon hydrogenation treatment method, in particular to a catalytic diesel hydrogenation conversion process. 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%. In recent years, with t...

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Problems solved by technology

However, this method cannot selectively reduce the hydrogenation saturation of gasoline components, so the octane number loss of gasoline products is relatively large

[0005] EP20110834653 discloses a method for preparing a polycyclic aromatic hydrocarbon hydrogenation conversion catalyst. The catalyst carrier is composed of β molecular sieve and pseudo-boehmite. The active metal components of Group VIB and Group VIII are added by conventional methods, but the catalyst is also Strong saturation ability for gasoline components, which is not conducive to the process of catalytic diesel hydrogenation conversion to produce high-octane gasoline

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