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Light cycle oil selective hydrodesulphurization catalyst and method thereof

A light cycle oil, hydrodesulfurization technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of small loss of aromatics, large loss of aromatics, low activity, etc. The effect of denitrification activity

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the existing light cycle oil has low selectivity, low activity, poor stability, and large loss of aromatics in the hydrodesulfurization process. A new light cycle oil is provided A catalyst for hydrodesulfurization, which is used for hydrodesulfurization of light cycle oil, and has the advantages of low hydrogen consumption and small loss of aromatics

Method used

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  • Light cycle oil selective hydrodesulphurization catalyst and method thereof
  • Light cycle oil selective hydrodesulphurization catalyst and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of composite carrier: A: Take 95 grams of boehmite and 5 grams of UFI molecular sieve and mix well. B: Take 20 grams of water, add 5.0 grams of 1:1 nitric acid, 3.5 grams of 10% by weight phosphoric acid, and 50 grams of 20% by weight of magnesium acetate, mix and dissolve uniformly. Add B slowly to A and stir evenly. After kneading for 40 minutes, dry at 130°C for 3 hours and calcined at 500°C for 2 hours to obtain γ-Al 2 O 3 Composite carrier 1.

[0017] For catalyst preparation, the catalyst carrier is prepared by the impregnation method, and the impregnation solution is prepared. Weigh 5.5 grams of basic cobalt carbonate, add 5.6 grams of citric acid, 60 grams of water, heat to dissolve, then add 20 grams of ethylenediamine, and then add 20 grams of ammonium molybdate After gram stirring until completely dissolved, weigh 100 grams of composite carrier I, spray the impregnating solution uniformly on the carrier, and dry and roast to obtain the hydrodesulfuri...

Embodiment 2～9

[0019] The composite carrier is exactly the same as in Example 1, except that the carrier material ratio is different, and the changed conditions are shown in Table 1. The preparation method of the catalyst is exactly the same as in Example 1, except that the amount of the active group supported on the composite carrier is different. See Table 2 for details.

[0020] Table 1

[0021]

[0022] * The amount of additives is calculated based on 100 grams of dry composite carrier, and the amount of nitric acid and water is calculated in the same way as the amount of additives.

[0023] ** Phosphorus source is ammonium hydrogen phosphate, *** Ammonium dihydrogen phosphate, phosphoric acid is not marked, **** Si / Al>6

[0024] # Magnesium source is magnesium carbonate, ##acetic acid, ###magnesium chloride, magnesium nitrate is not marked

[0025] Table 2

[0026] Active ingredient

Embodiment 10～12

[0040] Select the catalyst of Example 4, and the results under different sulfur content LCO raw materials and different evaluation conditions are listed in Table 4

[0041] Table 4

[0042]

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Abstract

The invention relates to a catalyst used in light cycle oil selective hydrodesulphurization, and a hydrodesulphurization method thereof. With the catalyst and the method, a problem of traditional light cycle oil of large arene loss caused by desulphurization is solved. According to the invention, a light cycle oil selective hydrodesulphurization method is adopted. With the method, a sulfur removal rate in the light cycle oil is higher than 92% by weight, and an arene total retention rate in a product is higher than 97% by weight. The catalyst comprises components of, by weight: (a) 70-97% of a composite carrier, (b) 1-8% of CoO loaded on the carrier, and (c) 2-25% of MoO3. With the technical scheme, the problem is well solved. The method can be used in industrial productions of light cycle oil selective hydrodesulphurization.

Description

Technical field [0001] The invention relates to a catalyst for selective hydrodesulfurization of light cycle oil and a method thereof. Background technique [0002] Catalytically cracked light cycle oil (LCO) is usually used as a poor quality blended diesel component and is generally mixed with straight-run diesel. From the perspective of the composition of LCO, the total aromatics content is as high as 50%-85%, of which naphthalene-based bicyclic aromatic hydrocarbons account for about 70%, monocyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons 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 my country's catalytic cracking (FCC) units has exceeded 68 million tons, and the annual production capacity of LCO has exceeded 10 million tons. In our country, a large amount of LCO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/78B01J29/58B01J29/16B01J29/69B01J29/26C10G45/12
Inventor 钱斌孔德金郑钧林陈燕
Owner CHINA PETROLEUM & CHEM CORP