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Hydrocracking method

A hydrocracking and hydrofining technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve problems such as easy clogging and increased pressure drop in reactors, so as to prevent clogging, avoid pressure drop, prolong The effect of turning head time

Active Publication Date: 2018-05-25
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The raw material of heavy distillate oil (see Table 1 for properties, the raw material used in the following examples and comparative examples) is mixed with hydrogen and then enters the hydrofining reactor, hydrocracking reactor and separation system in sequence, and light naphtha, Heavy naphtha, aviation kerosene fraction, diesel fraction and hydrocracking tail oil, the upper part of the hydrotreating reactor is provided with a cylinder with a bottom, and the height of the cylinder is 5% of the height of the hydrotreating reactor. The outer diameter is 95% of the inner diameter of the hydrotreating reactor. There are holes on the bottom and side wall of the cylinder to allow the flow to pass through. The size of the hole is 5 mesh. The cylinder is filled with hydrotreating catalysts along the flow direction A, hydrofining catalyst B, the loading volume ratio is 1:5, the properties of the hydrofining catalyst A are as follows: the amount of infrared acid is 0.4mmol / g, t...

Embodiment 2

[0040] The raw material of heavy distillate oil (see Table 1 for properties, the raw material used in the following examples and comparative examples) is mixed with hydrogen and then enters the hydrofining reactor, hydrocracking reactor and separation system in sequence, and light naphtha, Heavy naphtha, aviation kerosene fraction, diesel fraction and hydrocracking tail oil, the upper part of the hydrofinishing reactor is provided with a cylinder with a bottom, and the height of the cylinder is 20% of the height of the hydrofinishing reactor. The outer diameter is 90% of the inner diameter of the hydrofining reactor, and there are holes on the bottom and side wall of the cylinder to allow the flow to pass through. A, hydrofining catalyst B, the loading volume ratio is 1:3, the properties of the hydrofining catalyst A are as follows: the amount of infrared acid is 0.45mmol / g, the pore volume is 0.55ml / g, and the particle diameter of the catalyst is 5.5 mm, with a specific surfa...

Embodiment 3

[0042] The raw material of heavy distillate oil (see Table 1 for properties, the raw material used in the following examples and comparative examples) is mixed with hydrogen and then enters the hydrofining reactor, hydrocracking reactor and separation system in sequence, and light naphtha, Heavy naphtha, aviation kerosene fraction, diesel fraction and hydrocracking tail oil, the upper part of the hydrofinishing reactor is provided with a cylinder with a bottom, and the height of the cylinder is 15% of the height of the hydrofinishing reactor. The outer diameter is 85% of the inner diameter of the hydrotreating reactor. There are holes on the bottom and side wall of the cylinder to allow the flow to pass through. The size of the hole is 15 mesh. The cylinder is filled with hydrotreating catalysts along the flow direction A, hydrofining catalyst B, the loading volume ratio is 3:1, the properties of the hydrofining catalyst A are as follows: the amount of infrared acid is 0.5mmol / ...

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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 for asphaltene-containing heavy oil. Background technique [0002] With the rapid development of my country's economy, the 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 leapt to the second place in the world. In addition, due to the year-by-year deterioration of the quality of domestic crude oil, the substantial increase in the processing of imported inferior crude oil, the increasingly stringent requirements for environmental protection on the refining process and the quality of petroleum products, and the increasing market demand for clean fuel and chemical raw materials, especially as Clean middle distillates for transportatio...

Claims

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Application Information

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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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