One-stage tandem hydrocracking method

A hydrocracking and hydrofining technology, which is applied in the fields of hydrotreating process, petroleum industry, hydrocarbon oil treatment products, etc., can solve the problems of low improvement of jet fuel quality, low economic benefit, limited yield of chemical raw materials, etc.

A hydrocracking and hydrofining technology, which is applied in the fields of hydrotreating process, petroleum industry, hydrocarbon oil treatment products, etc., can solve the problems of low improvement of jet fuel quality, low economic benefit, limited yield of chemical raw materials, etc.

CN110938469AActive Publication Date: 2020-03-31CHINA PETROLEUM & CHEM CORP +1
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  • One-stage tandem hydrocracking method
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  • One-stage tandem hydrocracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Using raw oil 1 as raw material, there are 2 catalyst beds in the hydrofinishing reactor and 3 catalyst beds in the hydrocracking reactor, and the catalysts are loaded sequentially along the flow direction ,catalyst and Catalyst III, the catalyst loading volume ratio is 1:1:1. See Tables 4 and 5 for specific hydrogenation reaction conditions, product distribution and properties.

Embodiment 2

[0045] Same as Example 1, 2 catalyst beds are set in the hydrofinishing reactor, and 3 catalyst beds are set in the hydrocracking reactor, the difference is that the catalyst loading volume ratio is 2:1:1. See Tables 4 and 5 for specific hydrogenation reaction conditions, product distribution and properties.

Embodiment 3

[0047] Same as Example 1, 2 catalyst beds are set in the hydrofinishing reactor, and 3 catalyst beds are set in the hydrocracking reactor, the difference is that the catalyst loading volume ratio is 1:2:1. See Tables 4 and 5 for specific hydrogenation reaction conditions, product distribution and properties.

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Abstract

The invention discloses a one-stage tandem hydrocracking method, which comprises the following steps that (1) a wax oil raw material and hydrogen are mixed, and the mixture enters a hydrofining reactor and is subjected to a desulfurization, denitrification and aromatic hydrocarbon saturation reaction; (2) the effluent obtained in the step (1) enters a hydrocracking reactor, wherein the hydrocracking reactor comprises first to nth catalyst bed layers along a material direction, n is greater than or equal to 3, and various catalyst bed layers are filled with hydrocracking catalysts with different contents of modified Y molecular sieves; and (3) the effluent of the hydrocracking reactor is subjected to gas-liquid separation, and the liquid phase is fractionated to obtain naphtha, aviation kerosene and diesel oil products. According to the invention, wax oil is used as a raw material, the yield of heavy naphtha with high aromatic potential is increased and the quality of aviation keroseneand diesel oil products is improved by setting a reasonable catalyst grading mode and modulating the catalyst composition and the catalyst structure in grading bed layers.

Description

technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method for producing high-quality clean fuel by using vacuum wax oil as a raw material. Background technique [0002] Hydrocracking technology has the characteristics of strong adaptability to raw materials, great flexibility in production operations and product plans, and good product quality. It can directly convert various heavy and low-quality feedstocks into high-quality jet fuel, diesel, and lubricating oil base materials that are urgently needed by the market. As well as chemical naphtha and tail oil steam cracking raw materials for ethylene production, it has become one of the most important heavy oil deep processing processes in modern oil refining and petrochemical industries, and has been increasingly widely used at home and abroad. [0003] CN200610008413.X discloses a combined hydrocracking method. In this method, low-quality catalytic cracking diesel oil is ...

Claims

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Application Information

Patent Timeline
31 Mar 2020
Publication
CN110938469A
IPC
C10G67/02
CPC
C10G67/02; C10G2300/1037; C10G2300/202; C10G2300/70; C10G2400/04
Inventors
崔哲; 吴子明