Method for producing clean diesel by full liquid phase hydrogenation

A technology of liquid-phase hydrogenation and hydrogenation products, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of unresolved harmful impurities removal, complex cross-flow reactor structure, and reduced reaction efficiency. , to achieve the effect of ensuring activity stability, low cost, and improving hydrogenation activity

Active Publication Date: 2012-02-22
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] U.S. Patents US6213835, US6428686, etc. disclose a hydrogenation process for pre-dissolving hydrogen, which increases the amount of dissolved hydrogen by circulating hydrogenated oil, but it does not solve the problem of H 2 S, NH 3 The problem of removal of harmful impurities, such as harmful impurities, leads to their continuous accumulation in the reactor, which greatly reduces the reaction efficiency
[0009] Chinese patent CN101724443A discloses a two-phase hydrogenation treatment method for distillate oil. The ra

Method used

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  • Method for producing clean diesel by full liquid phase hydrogenation
  • Method for producing clean diesel by full liquid phase hydrogenation
  • Method for producing clean diesel by full liquid phase hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Two-stage hydrogenation reactors in series are used. The raw materials used are shown in Table 1-1. The catalyst is FH-98 hydrogenation catalyst commonly used in the industry. See Table 1-2 for process conditions and Table 1-3 for properties of refined diesel oil.

[0033] Table 1-1 Properties of Raw Oil

[0034] Oil properties

Raw oil 1

Density (20℃), g / cm 3

0.8922

Distillation range, ℃

128～367

Sulfur, μg / g

8200

Nitrogen, μg / g

630

Actual colloid, mg / 100ml

280

Polycyclic aromatic hydrocarbons, m%

17.4

Total aromatics, m%

32.7

cetane number

42.2

[0035] Table 1-2 Process conditions

[0036] Process conditions

Example 1

Raw oil

Raw oil 1

reactor

two stages in series

Reaction temperature, °C

340

Reaction pressure, MPa

6.0

Circulation volume ratio (circulation oil: fresh raw mater...

Embodiment 2

[0041] Two-stage hydrogenation reactors in series are used, the raw materials used are shown in Table 2-1, and the catalyst is FH-98 hydrogenation refining catalyst. See Table 2-2 for process conditions and Table 2-3 for properties of refined diesel oil.

[0042] Table 2-1 Properties of Raw Oil

[0043] Oil properties

Raw oil 2

Density (20℃), g / cm 3

0.8935

Distillation range, ℃

164～365

Sulfur, μg / g

3200

Nitrogen, μg / g

2040

Actual colloid, mg / 100ml

182

Total aromatics, m%

37.2

cetane number

41

[0044] Table 2-2 Process conditions

[0045] Process conditions

Example 2

Raw oil

Raw oil 2

reactor

two stages in series

Reaction temperature, °C

360

Reaction pressure, MPa

6.5

Circulation volume ratio (circulation oil: fresh raw material)

2.5

1st / 2nd volumetric space velocity, h -1

4...

Embodiment 3

[0049] Three-stage series hydrogenation reactors are used. The raw materials used are shown in Table 3-1. The catalysts are FH-98 hydrofinishing catalyst and FC-12 hydrocracking catalyst commonly used in the industry. The two catalysts are evenly loaded in each reactor. . See Table 3-2 for process conditions and Table 3-3 for properties of refined diesel oil.

[0050] Table 3-1 Properties of Raw Oil

[0051] Oil properties

Raw oil 2

Density (20℃), g / cm 3

0.9135

Distillation range, ℃

197～465

Sulfur, μg / g

4200

Nitrogen, μg / g

2940

Actual colloid, mg / 100mL

262

Total aromatics, m%

39.2

[0052] Table 3-2 Process conditions

[0053] Process conditions

Example 2

Raw oil

Raw oil 2

reactor

two stages in series

Reaction temperature, °C

370

Reaction pressure, MPa

6.5

Circulation volume ratio (circulation oil: fresh ra...

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PUM

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Abstract

The invention relates to a method for producing clean diesel by full liquid phase hydrogenation. The method comprises the following steps that: raw materials, hydrogen and a circulating liquid hydrogenated product are subjected to hydrogen saturation in a pipeline to form a liquid-phase raw material/hydrogenated product/hydrogen mixture; under a hydrogenation process condition, the liquid-phase mixture with saturated dissolved hydrogen sectionally enters a multi-stage conventional hydrogenation reactor. According to the present invention, with the hydrogenation reactor, the hydrogenation reaction is catalyzing, the reaction by products such as H2S and NH3 are discharged out of the reaction system; the materials contacting the solid-phase catalyst are the liquid-phase reaction materials so as to improve the hydrogenation reaction efficiency; the method does not require the hydrogen circulating so as to substantially reduce the equipment investment and the operation cost; the method provided by the present invention can be used in hydrogenation, desulfurization, denitrogenation and dearomatization refinement for poor-quality diesel fuel fractions, and can be applicable for the technical process for producing high-quality clean diesel by using the fraction oil such as VGO raw material mild hydrocracking.

Description

technical field [0001] The invention relates to clean fuel production technology, and is a method for producing clean fuel by fixed-bed hydrogenation, in particular, a method for producing clean diesel by fixed-bed full-liquid-phase hydrogenation. Background technique [0002] The sulfur content of crude oil supplied in the global crude oil market tends to be higher. Sulfur must be removed during the refining process in order for the various end products to meet specification requirements. In order to solve the difficulties caused by deep desulfurization, various companies and research departments around the world have developed a variety of methods: replace the current catalyst with a catalyst with higher activity; increase the operating temperature; increase the purity of hydrogen or increase the partial pressure of hydrogen; improve the reactor; improve Catalyst bed feed distribution; removal of hydrogen sulfide from recycle gas, etc. Without exception, these measures w...

Claims

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Application Information

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IPC IPC(8): C10G65/02C10G65/08
Inventor 南军于海斌刘红光张景成耿姗曲晓龙张玉婷刘新普刘晨光柴永明
Owner CHINA NAT OFFSHORE OIL CORP
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