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A kind of hydrocracking method

A hydrocracking and hydrofining technology, which is applied in the field of hydrocracking, can solve the problems of increased pressure drop and easy clogging of reactors, and achieve the effects of avoiding pressure drop, preventing clogging, and reducing the number of skimming

Active Publication Date: 2019-11-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the device has been running for a period of time, the impurities in the raw oil can easily block the pores of the catalyst in the reactor bed and the gaps between the catalysts, resulting in an increase in the pressure drop of the reactor and forcing the device to shut down.

Method used

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  • A kind of hydrocracking method
  • A kind of hydrocracking method
  • A kind of hydrocracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The heavy distillate raw material (see Table 1 for properties, the following examples and comparative examples all use this raw material) and hydrogen are mixed and sequentially enter the hydrofining reactor, hydrocracking reactor and separation system to separate light naphtha, Heavy naphtha, jet fuel fraction, diesel fraction and hydrocracking tail oil. The upper part of the hydrorefining reactor is provided with a bottomed cylinder. The height of the cylinder is 5% of the height of the hydrorefining reactor. The outer diameter is 95% of the inner diameter of the hydrorefining reactor. The bottom and side walls of the cylinder are provided with holes through which the flow can pass. The size of the holes is 5 mesh. The cylinder is filled with hydrorefining catalysts in sequence along the flow direction. A. Hydrorefining catalyst B. The filling volume ratio is 1:5. The properties of the hydrorefining catalyst A are as follows: the amount of infrared acid is 0.4mmol / g, th...

Embodiment 2

[0040] The heavy distillate raw material (see Table 1 for properties, the following examples and comparative examples all use this raw material) and hydrogen are mixed and sequentially enter the hydrofining reactor, hydrocracking reactor and separation system to separate light naphtha, Heavy naphtha, jet fuel fraction, diesel fraction and hydrocracking tail oil. The upper part of the hydrorefining reactor is provided with a bottomed cylinder. The height of the cylinder is 20% of the height of the hydrorefining reactor. The outer diameter is 90% of the inner diameter of the hydrofining reactor. The bottom and side walls of the cylinder are provided with holes through which the flow can pass. The size of the holes is 20 meshes. The cylinder is filled with hydrofining catalysts in sequence along the flow direction. A. Hydrorefining catalyst B, the filling volume ratio is 1:3, the properties of the hydrorefining catalyst A are as follows: the amount of infrared acid is 0.45mmol / g, t...

Embodiment 3

[0042] The heavy distillate raw material (see Table 1 for properties, the following examples and comparative examples all use this raw material) and hydrogen are mixed and sequentially enter the hydrofining reactor, hydrocracking reactor and separation system to separate light naphtha, Heavy naphtha, jet fuel fraction, diesel fraction and hydrocracking tail oil. The upper part of the hydrorefining reactor is provided with a bottomed cylinder. The height of the cylinder is 15% of the height of the hydrorefining reactor. The outer diameter is 85% of the inner diameter of the hydrorefining reactor. The bottom and side walls of the cylinder are provided with holes through which the flow can pass. The size of the holes is 15 mesh. The cylinder is filled with hydrorefining catalysts in sequence along the flow direction. A. Hydrorefining catalyst B, the filling volume ratio is 3:1, the properties of the hydrorefining catalyst A are as follows: the amount of infrared acid is 0.5mmol / g, ...

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Abstract

The invention discloses a hydrocracking method. The method comprises the following contents: heavy distillate oil raw material and hydrogen orderly enter a hydrorefining reactor, a hydrocracking reactor and a separation system after being mixed; a cylinder with a bottom is arranged at an upper part of the hydrorefining reactor, the height of the cylinder is 4%-20% of the height of the hydrorefining reactor, and the outer diameter of the cylinder is 85%-95% of the inner diameter of the hydrorefining reactor; holes through which the material flow can pass are formed on the bottom and the side wall of the cylinder, and the sizes of the holes are 1-40 mesh; the cylinder is filled with hydrorefining catalyst, the infrared acid amount and the active metal content of the filled catalyst are in anenhanced situation along the material flow direction, the catalyst pore volume, the particle size and the specific surface area are in a reduced situation, and the bottom of the cylinder is filled with the conventional hydrorefining catalyst. Compared with the existing hydrocracking technology, the hydrocracking process disclosed by the invention is more flexible in flow, can process more inferior raw material, and greatly improves the processing capacity of the device.

Description

Technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method of asphaltene-containing heavy oil. Background technique [0002] With the rapid development of my country's economy, oil processing capacity has grown rapidly. At the same time, domestic hydrocracking technology has also obtained large-scale industrial applications. The total processing capacity of hydrocracking units in operation in my country has exceeded 40.0Mt / a, and the processing capacity has jumped to the second place in the world. In addition, due to the deterioration of the quality of domestic crude oil year by year, the processing volume of imported low-quality crude oil has increased significantly, environmental protection requirements for the quality of oil refining processes and petroleum products have become increasingly stringent, and the market demand for clean fuel and chemical raw materials has continued to increase, especially as Clean middle distil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1037C10G2300/202C10G2300/206
Inventor 曹均丰刘昶郝文月廖杰锋王凤来杜艳泽黄薇关明华
Owner CHINA PETROLEUM & CHEM CORP
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