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Process for improving cetane number of diesel oil and reducing aromatic hydrocarbon of diesel oil simultaneously

A technology of cetane number and diesel oil, which is applied in the field of increasing the cetane number of diesel oil while reducing its aromatics, and can solve problems such as difficult operation, difficult realization, and complicated components

Inactive Publication Date: 2005-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can produce ultra-low aromatics diesel, but the second step of the method adopts a reverse flow process, the internal components of the reactor are complicated, the operation is difficult, and there are many difficulties in industrial implementation

Method used

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  • Process for improving cetane number of diesel oil and reducing aromatic hydrocarbon of diesel oil simultaneously

Examples

Experimental program
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preparation example Construction

[0028] The preparation method of this catalyst is as follows:

[0029] First, the mesoporous silicon-alumina carrier is shaped, and the formed carrier is dried at 80°C-140°C for 2-10 hours, and then calcined at 400-650°C for 2-10 hours. The platinum and palladium solution used are chloride, chlorate or ammonium salt of platinum and palladium. Immerse for 1-8 hours by saturated impregnation method, then dry at 80°C-140°C for 2-10 hours, and bake at 400-650°C for 2-10 hours. The content of noble metals platinum and palladium is 0.1-10% by weight, and the weight ratio of platinum and palladium is 0.1-10:1.

[0030] The hydrodearomatization catalyst has excellent aromatic hydrocarbon hydrogenation activity, anti-sulfur and nitrogen poisoning performance and low cracking performance, and can avoid the cracking of diesel oil distillate into small molecular by-products.

[0031] The method provided by the present invention will be further described below in conjunction with the acc...

Embodiment 1

[0047] The raw material in this example is FCC diesel oil A, and the properties of the raw material are shown in Table 2.

[0048] The raw material is first contacted with hydrogen and hydrogenation upgrading catalyst RIC-1 in the first-stage hydrogenation upgrading reactor, at a hydrogen partial pressure of 6.4MPa, a temperature of 360°C, and a hydrogen-to-oil volume ratio of 600Nm 3 / m 3 , liquid hourly space velocity 1.3h -1 Under the conditions of the reaction, the effluent of the first-stage hydro-upgrading reactor directly enters the hot high-pressure separator. The bottom of the hot high fraction is fed with hydrogen or hydrogen-rich gas for stripping to remove impurities such as hydrogen sulfide and ammonia in a reactant stream. The hot high-fraction stripping gas is cooled in two steps to obtain the diesel fraction and part of the naphtha produced by cracking in the first stage. The diesel fraction is used as cold oil and sent to the second-stage hydrodearomatizatio...

Embodiment 2

[0051] The raw material in this example is catalytic cracking diesel oil B, and the properties of the raw material are shown in Table 2.

[0052] The raw material is first contacted with hydrogen and hydrogenation upgrading catalyst RIC-1 in the first-stage hydrogenation upgrading reactor, at a hydrogen partial pressure of 8.0MPa, a temperature of 360°C, and a hydrogen-to-oil volume ratio of 500Nm 3 / m 3 , liquid hourly space velocity 1.5h -1 Under the conditions of the reaction, the effluent of the first-stage hydro-upgrading reactor directly enters the hot high-pressure separator. The bottom of the hot high fraction is fed with hydrogen or hydrogen-rich gas for stripping to remove impurities such as hydrogen sulfide and ammonia in a reactant stream. The hot high-fraction stripping gas is cooled in two steps to obtain the diesel fraction and part of the naphtha produced by cracking in the first stage. The diesel fraction is used as cold oil and sent to the second-stage hydr...

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Abstract

The invention provides a process for improving cetane number of diesel oil and reducing aromatic hydrocarbon of diesel oil simultaneously which comprises, charging the diesel raw material and hydrogen gas into a first reactor, contacting non-noble metal hydrogenation catalyst, charging the reaction effluent from the first reactor into a second reactor, contacting noble metal hydrodealkylation catalyst, isolating the reaction effluent from the second reactor to obtain the diesel product.

Description

technical field [0001] The invention belongs to a method for hydrotreating hydrocarbon oil, more specifically, it belongs to a method for increasing the cetane number of diesel oil while reducing its aromatics. Background technique [0002] At present, the demand for high-quality diesel fuel in domestic and foreign oil product markets is constantly increasing, and this trend of maintaining demand growth will continue in the foreseeable future. On the other hand, with the increasing pressure of environmental protection, the quality of diesel has become another hot topic at present, and the specification agencies have gradually introduced some new clean diesel specifications. In addition to more stringent restrictions on the sulfur content in diesel, the new specification also puts forward further requirements on the aromatics content and cetane number. [0003] The content of aromatics and cetane number in diesel directly affect the combustion perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 胡志海蒋东红石玉林夏国富
Owner CHINA PETROLEUM & CHEM CORP
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