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Selective hydrodesulfurization method of light cycle oil

A light cycle oil, hydrodesulfurization technology, applied in the petroleum industry, hydrocarbon oil treatment and other directions, can solve the problems of large loss of aromatics, low hydrogenation selectivity, etc., to improve comprehensive performance, improve desulfurization, and improve mutual synergy effect of action

Active Publication Date: 2015-08-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the existing inferior oil products, such as the low hydrogenation selectivity of light cycle oil and the large loss of aromatics in the hydrofining process, provide a new light cycle oil Selective Hydrodesulfurization Process

Method used

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  • Selective hydrodesulfurization method of light cycle oil
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  • Selective hydrodesulfurization method of light cycle oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of the composite carrier: A: take 200 grams of boehmite; B: take 40 grams of water, add 10.0 grams of 1:1 nitric acid, mix and dissolve evenly. Slowly add B into A and stir evenly, knead for 40 minutes, extrude and dry at 100-130°C for 3 hours, and bake at 500°C for 2 hours to obtain γ-Al 2 o 3 Forming carrier 1. Get molding carrier (I) 89 grams and contain 5.00% V by weight percentage 2 o 5 Immerse in 80 grams of ammonium metavanadate aqueous solution, dry at 100-130°C for 3 hours, and roast at 590°C for 2 hours; Drying at ℃ for 3 hours, calcining at 550℃ for 2 hours; after calcination, the carrier is impregnated with phosphoric acid aqueous solution containing 3.75% P2O5 in weight percentage, then dried at 100-130℃ for 3 hours, and calcined at 500℃ for 2 hours to obtain a composite carrier. See Table 1 for sources of raw materials.

[0030] Catalyst preparation, take 100 grams of composite carrier, prepare the catalyst by impregnation method, prepare ...

Embodiment 2-9

[0033] The preparation method of the composite carrier is exactly the same as that in Example 1, except that the concentration of the impregnating liquid raw materials used in the preparation of the composite carrier is different, and the changed conditions are shown in Table 1. The preparation method of the catalyst is exactly the same as that of Example 1, except that when the active component is NiO or CoO plus NiO, the cobalt salt in the impregnation solution is partially or completely replaced by nickel salt, and the amount of the active group loaded on the composite carrier is The difference, see Table 2 for details.

[0034] Table 1

[0035]

[0036] *Amount of oxide in the composite support in percent by weight.

[0037] Table 2

[0038] active ingredient

Embodiment 10～15

[0048] The catalyst of Example 4 is selected, and the results in Table 4 of different sulfur content LCO raw materials and different evaluation conditions are listed in Table 5.

[0049] Table 4

[0050]

Sulfur content (ppm)

Nitrogen content (ppm)

PAH content (wt%)

Total aromatics content (wt%)

raw material 1

2000

350

45.5

72.6

raw material 2

4000

260

48.3

78.3

raw material 3

6000

530

52.6

80.6

raw material 4

8000

420

56.3

77.2

raw material 5

10000

760

48.7

85.3

raw material 6

15000

620

58.9

80.6

[0051] wt% means percentage by weight.

[0052] table 5

[0053]

[0054] wt% means percentage by weight.

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Abstract

The invention relates to a method for desulfuration by the selective hydrogenation of light cycle oil, mainly solving the problem that the loss of aromatic hydrocarbon is high during the existing hydrogenation desulfuration process. The method provided by the invention comprises the following steps: by taking the light cycle oil with the sulfur content of 2000 to 15000 ppm and the hydrogen as raw materials, contacting the raw materials with a catalyst under the conditions that the volume ratio of hydrogen to the light cycle oil is (300- 800):1, the temperature is 250 to 450 DEG C and the weight space velocity is 0.5 to 3.0 per hour and the pressure is 3.0 to 12.0 MPa, wherein after the reaction is finished, naphthalene series double-polycyclic aromatic hydrocarbon and polycyclic aromatic hydrocarbon in the oil product are partially saturated or opened, the conversion rate of the polycyclic aromatic hydrocarbon reaches more than 35.0%, the retention rate of the total aromatic hydrocarbon of a product is greater than 97.0%, the desulfuration rate is greater than 97.0%, and the denitrification rate is greater than 95.0%. Thus, according to the adopted technical scheme, the problem is solved well. The method provided by the invention can be applied to the industrial production of benzene and xylene by the selective hydrogenation of an inferior oil product.

Description

technical field [0001] The invention relates to a method for selective hydrodesulfurization of light cycle oil. Background technique [0002] Lower quality oils, such as FCC light cycle oil (LCO), are often used as a lower quality blended diesel component blended with straight run diesel. From the perspective of the composition of LCO, the total aromatics content is as high as 50% to 85%, of which naphthalene-based bicyclic aromatics account for about 70%, single-ring aromatics and tricyclic aromatics each account for about 15%, and the others are alkanes, cycloalkanes and alkenes. Wait. The sulfur content of LCO is high (0.2-1.5wt%), the cetane number is only 20-35, and the ignition performance is poor. The annual processing capacity of catalytic cracking (FCC) units in my country has exceeded 68 million tons, and the annual production capacity of LCO has exceeded 10 million tons. In my country, a large amount of LCO is transferred into the general composition of diesel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G49/04
Inventor 孔德金钱斌郑均林
Owner CHINA PETROLEUM & CHEM CORP
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