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Hydrofining method of pyrolysis gasoline

A technology of pyrolysis gasoline and hydrofining, applied in the direction of selective hydrofining, chemical instruments and methods, molecular sieve catalysts, etc., can solve the problems of the catalyst’s anti-impurity ability to be improved, the catalyst’s unstable operation, and the catalyst’s high price. Ease of operating condition control, high diene selectivity, and long regeneration cycle

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using palladium-based catalysts is that the price of the catalyst is high. The palladium catalyst is sensitive to trace impurities in the raw material such as sulfur, arsenic, nitrogen, etc., the catalyst is unstable, and the regeneration cycle is short. Completely inactivated within a week at the shortest
Chinese patent CN1429890A discloses a catalyst for selective hydrogenation of pyrolysis gasoline, the active component of which is palladium, and the impurity resistance of the catalyst needs to be improved

Method used

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  • Hydrofining method of pyrolysis gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of carrier

[0030] Take the specific surface area as 176m 2 / g, 100g of strip-shaped alumina with a pore volume of 0.54ml / g, impregnated with 50ml of titanium sulfate in a 0.6g / ml dilute sulfuric acid solution, stirred for 20 minutes, and dried at 110°C for 10 hours to obtain alumina- Titanium oxide. And the ratio is 4:1.

[0031] Then mix the prepared 30g of alumina-titanium oxide and 70g of ZSM-5 powder, add a certain amount of 2% dilute nitric acid solution, knead and extrude, dry at 110°C for 12 hours, and roast at 500°C After 6 hours, a composite carrier of alumina-titania and ZSM-5 powder was prepared. Alumina-titania accounts for 30% by weight, and ZSM-5 powder accounts for 70% by weight.

[0032] (2) Preparation of catalyst

[0033] Add 70.5g of nickel nitrate to 100ml of water, stir and dissolve, adjust the pH value to 5, impregnate on 100g of carrier 1, dry at 120°C for 6 hours, and then roast at 600°C for 5 hours to obtain the catalyst. ...

Embodiment 2

[0035] The preparation method of alumina-titanium oxide is the same as in Example 1, and then the prepared 40g of alumina-titanium oxide and 60g of ZSM-5 powder are mixed, and a certain amount of 2% dilute nitric acid solution is added, after kneading and extruding, the Drying at 110°C for 12 hours and calcining at 500°C for 6 hours to prepare alumina-titania and ZSM-5 powder composite carrier. Alumina-titania accounts for 40% by weight, and ZSM-5 powder accounts for 60% by weight.

[0036]Add 62.7g of nickel nitrate to 100ml of water, stir and dissolve, adjust the pH value to 5, impregnate on 100g of carrier 1, dry at 120°C for 6 hours, and then roast at 600°C for 5 hours to obtain the catalyst. The nickel oxide content is 16% by weight.

Embodiment 3

[0038] The preparation method of alumina-titanium oxide is the same as that of Example 1, and then the prepared 60g of alumina-titanium oxide and 40g of ZSM-5 powder are mixed, and a certain amount of 2% dilute nitric acid solution is added, and after kneading and extruding, the Drying at 110°C for 12 hours and calcining at 500°C for 6 hours to prepare alumina-titania and ZSM-5 powder composite carrier. Alumina-titania accounts for 60% by weight, and ZSM-5 powder accounts for 40% by weight.

[0039] Add 78.4g of nickel nitrate to 100ml of water, stir and dissolve, adjust the pH value to 5, impregnate on 100g of carrier 1, dry at 120°C for 6 hours, and then roast at 600°C for 5 hours to obtain the catalyst. The nickel oxide content is 20% by weight.

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Abstract

The invention relates to a hydrofining method of pyrolysis gasoline. The method comprises the steps of: under the existence condition of a nickel catalyst of which active components are more uniform to disperse, performing a catalytic hydrogenation reaction on raw materials of the pyrolysis gasoline, and controlling reaction conditions in a reaction process to perform hydrofining of the pyrolysis gasoline so as to obtain downstream refined raw materials with a lower diene value and a lower bromine value. The nickel catalyst used by the hydrofining method disclosed by the invention has the characteristics of high low-temperature hydrogenation activity, high diene selectivity, high capability of resisting impurities and sol, long regeneration cycle and good stability. Under technological conditions of the hydrofining method disclosed by the invention, the catalyst is used for performing a hydrogenation reaction, controlling operating conditions is facilitated, and a favorable hydrofining effect of the pyrolysis gasoline can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of catalytic hydrogenation and relates to a method for hydrogenation refining of pyrolysis gasoline. Background technique [0002] Pyrolysis gasoline is the largest by-product next to ethylene in terms of its output in the ethylene industry, by C 5 ~C 9 The above hundreds of compounds are rich in benzene, toluene, xylene and trimethylbenzene components, and the total aromatics content is as high as 72% to 78% (weight). Industry uses cutting to isolate C 6 ~C 8 , C 8 and C 9 Two-stage hydrorefining of different fractions or whole fractions to produce benzene, toluene, xylene, gasoline blend oil and aromatic solvent oil products. [0003] The one-stage hydrogenation process of pyrolysis gasoline in foreign countries is mainly to add a large amount of washing oil to the raw material before the 1970s, and carry out hydrogenation to remove alkynes and dienes under high temperature and high pressure. The rep...

Claims

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Application Information

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IPC IPC(8): C10G45/36B01J29/46
Inventor 季静柴忠义纪玉国张富春任玉梅杜周
Owner CHINA PETROLEUM & CHEM CORP
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