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Hydrocracking method for increasing quality of refined diesel oil

A technology for hydrocracking and refining diesel oil, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment to achieve the effects of improving refining effect, reducing reaction temperature, and saving cold hydrogen

Inactive Publication Date: 2004-04-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide an improved hydrocracking process, which can produce light clean diesel products that meet high-quality requirements without significantly increasing investment in equipment and materials

Method used

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  • Hydrocracking method for increasing quality of refined diesel oil
  • Hydrocracking method for increasing quality of refined diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2

[0016] First, the low-quality mixed diesel oil enters the medium-pressure hydrodesulfurization reactor, and the refined diesel oil is obtained through hydrogenation reaction. See Table 1 below.

[0017] Example 1

Example 2

Raw oil properties

Density, g / cm 3

0.8273

0.9035

cetane number

59.7

35.2

Sulfur content, μg / g

988

6200

Nitrogen content, μg / g

1200

1500

Hydrodesulfurization process conditions

catalyst

FH-98

FH-5

pressure, MPa

7.0

6.8

temperature, ℃

300

320

Airspeed, h -1

1.5

1.5

Hydrogen oil volume ratio

1000∶1

1000∶1

Refined Diesel Properties

Sulfur content, μg / g

300

200

Nitrogen content, μg / g

100

300

cetane number

62

40

Aromatic content, m%

35.0...

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Abstract

The present invention discloses a hydrocracking process for raising refined diesel oil quality, and is mainly characterized by that the poor diesel oil is undergone the process of hydrodesulfurization treatment, then the desulfurized refined diesel oil is mixed with the refined hydrocracked raw material oil, and fed into the hydrocracking reactor, and the sulfur and nitrogen contents in the mixed oil of the refined diesel oil and refined hydrocracked raw material oil must meet the feeding requirements of hydrocracking reactor. As compared with existent technology said invention can utilize hydrocracking equipment to raise the quality of refined poor diesel oil and can obtain high-quality clean fuel.

Description

1. Technical field [0001] The invention discloses an improved hydrocracking process, in particular a hydrocracking method for improving the quality of secondary processed diesel oil and inferior straight-run diesel oil. 2. Background technology [0002] With the continuous development of the national economy and the increasingly stringent environmental protection regulations, it is required to produce a large amount of light and clean fuels, which has quite high requirements on the existing refining technology. At present, the raw materials of various refineries are getting worse and worse, and the straight-run diesel fraction can no longer meet the quality requirements to directly produce qualified products, and heavy oil to light heavy oil conversion devices such as catalytic cracking and coking still exist widely, and must be produced Diesel fractions for secondary processing are produced. These fractions have very poor properties, and it is difficult to directly produce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
Inventor 刘涛赵玉琢尹恩杰吴宜冬王群杨福利潘德满
Owner CHINA PETROLEUM & CHEM CORP
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