Hydrogenation of distilled oil

A technology of distillate oil and hydrogenation catalyst, applied in the field of hydrogenation of distillate oil, which can solve the problems of complex process and high operation investment

Inactive Publication Date: 2006-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the investment in the two stages of operation is high and the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The preparation method of this catalyst comprises:

[0016] The precursor of alumina is mixed with zeolite, calcined, impregnated with an aqueous solution containing nickel and / or cobalt and molybdenum and / or tungsten, then dried and calcined, the precursor of alumina is a pore with a diameter of less than 80 angstroms A mixture of the precursor of small-pore alumina whose pore volume accounts for more than 95% of the total pore volume and the precursor of macro-porous alumina whose pore volume accounts for more than 70% of the total pore volume, and small-pore alumina The amount of precursor, macroporous alumina precursor and zeolite makes the weight ratio of small-porous alumina and macroporous alumina in the catalyst 75:25 to 50:50, and the ratio of the total weight of alumina to zeolite is 90: 10 to 50:50, preferably 90:10 to 60:40. The precursor of the small-pore alumina is hydrated alumina with a gibbsite content greater than 60% by weight, and the precursor of t...

Embodiment 1

[0039] Raw material A and hydrogen enter the hydrogenation reactor, at a hydrogen partial pressure of 6.4MPa, a temperature of 362°C, and a volume ratio of hydrogen to oil of 600Nm 3 / m 3 , liquid hourly space velocity is 1.0 hours -1 Under certain conditions, it is in contact with the hydrogenation catalyst without intermediate separation, the effluent after the reaction is cooled and separated, the hydrogen-containing gas is recycled, and the liquid product enters the fractionation system to be separated into diesel fraction and a small amount of naphtha.

[0040] The test results are shown in Table 3. As can be seen from Table 3, the yield of the diesel fraction product is 96.7% by weight, and the cetane number is 41.5. Compared with the raw material, the cetane number increases by 12.2 units, and the density is 0.8570 g / cm 3 , compared with the raw material, the density of the product decreases by 0.0417g / cm 3 .

Embodiment 2

[0042] Raw material B and hydrogen enter the hydrogenation reactor, at a hydrogen partial pressure of 6.4MPa, a temperature of 360°C, and a volume ratio of hydrogen to oil of 600Nm 3 / m 3 , liquid hourly space velocity is 1.36 hours -1 Under certain conditions, it is in contact with the hydrogenation catalyst without intermediate separation, the effluent after the reaction is cooled and separated, the hydrogen-containing gas is recycled, and the liquid product enters the fractionation system to be separated into diesel fraction and a small amount of naphtha.

[0043] The test results are shown in Table 3. As can be seen from Table 3, the yield of the diesel fraction product is 95.5% by weight, and the cetane number is 44.6. Compared with the raw material, the cetane number increases by 11.4 units, and the density is 0.8476 g / cm 3 , compared with the raw material, the density of the product decreases by 0.0368g / cm 3 .

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Abstract

A process for hydrogenating fraction oil features that the raw fraction oil is directly contacted with hydrocatalyst at 330-400 deg.C, 3-8 MPa of hydrogen pressure and 0.5-2.0 / hr for reaction, and the resultant substance is cooled and separated to obtain diesel oil and less naphtha. Said hydrocatalyst is composed of active metal component chosen from VIII or VIB family and the alumina-zeolite mixture as carrier. Its advantages are high output rate, high hexodecane number and low density and sulfur content.

Description

technical field [0001] The present invention pertains to a process for refining hydrocarbon oils in the presence of hydrogen, and more particularly to a process for the hydrogenation of distillate oils. Background technique [0002] FCC diesel is characterized by high density, low cetane number, high content of impurities such as sulfur and nitrogen, high content of olefins and aromatics, and poor storage stability, while diesel specifications are becoming increasingly stringent. In China, the new diesel product specifications that have been implemented require that the cetane number of diesel is not lower than 45, and the sulfur content is less than 0.20% by weight. Therefore, FCC diesel cannot be directly shipped as diesel products, but must be hydrotreated or blended before leaving the factory, and some can only be sold as low-priced fuel oil. [0003] Conventional hydrofining method and highly active hydrofining catalyst can effectively remove sulfur, nitrogen and other...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/00
Inventor 胡志海蒋东红石玉林陈水银应亦兵刘学芬
Owner CHINA PETROLEUM & CHEM CORP
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