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Cracking catalyst for reducing alkene content in catalytically cracked gasoline

A technology for catalytic cracking gasoline and cracking catalysts, which is applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc. It can solve the problem of high cost of molecular sieves, achieve the effects of reducing the olefin content of gasoline and excellent heavy oil conversion ability

Active Publication Date: 2006-02-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to reduce the olefin content of catalytic cracking gasoline, the strategy widely adopted at present is to use Y-type molecular sieves containing rare earths with high hydrogen transfer activity as active components, such as the catalyst of CN1317547A said to use REY and PREY as active components, both of which Prepared by two-cross-two-baking process, resulting in high cost of molecular sieve

Method used

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  • Cracking catalyst for reducing alkene content in catalytically cracked gasoline
  • Cracking catalyst for reducing alkene content in catalytically cracked gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Get 18.6 kilograms of NaY molecular sieves (Changling Oil Refinery Chemical Plant Catalyst Plant, ignition loss 24.9% by weight, silicon-aluminum ratio is 5.2) and 140 kilograms of deionized water are added to the reactor, and then 2.1 kilograms of ammonium sulfate are added thereto, and the temperature is increased at 90 ° C. After stirring for 5 minutes, adjust the pH of the system to 3.5-5.5 with hydrochloric acid, continue stirring for 1 hour, and then filter. Add 140 kg of water to the filter cake, then add 5.3 kg of solid lanthanum chloride, stir at 90°C for 2 hours, add 1.5 kg of sodium metaaluminate solution and 1.2 kg of ammonia water, stir for 5 minutes, filter, wash with water, and air-dry before entering the roaster , at a weight airspeed of 0.5 -1 Calcined at 550°C for 1.5 hours under the water vapor, and the molecular sieve obtained after cooling is marked as CDY-1A, washed with ammonium chloride solution at 60°C for 10 minutes according to the ratio of mo...

Embodiment 2

[0032] Get 18.6 kilograms of NaY molecular sieves (Changling Oil Refinery Chemical Plant Catalyst Plant, ignition loss 24.9% by weight, silicon-aluminum ratio is 5.2) and 140 kilograms of deionized water are added to the reactor, and then 2.1 kilograms of ammonium sulfate are added thereto, and the temperature is increased at 90 ° C. After stirring for 5 minutes, adjust the pH of the system to 3.5-5.5 with hydrochloric acid, continue stirring for 1 hour, and then filter. Add 140 kilograms of water to the filter cake, and then add 10.4 liters of rare earth chloride solution (the concentration of rare earth oxide is 312 g / liter, the same below), stir at room temperature for 5 minutes, then adjust the pH of the system to 3.5 to 5.5 with hydrochloric acid, and continue After stirring for 1 hour, add 2.2 kg of water glass solution and 1.3 kg of ammonia water, stir for 5 minutes, filter, wash with water, air-dry, then put into the roaster, and roast at 550°C for 1.5 hours. : ammoniu...

Embodiment 3

[0036] Get 46.6 kilograms of NaY molecular sieve slurry (Qilu Catalyst Factory, NaY concentration is 30.0% by weight, NaY silicon-aluminum ratio is 5.1) and 80 kilograms of deionized water are added in the reactor, and 5.3 liters of rare earth chloride solution are added thereto, 60 After stirring at ℃ for 5 minutes, use hydrochloric acid to adjust the pH of the system to 3.5-5.5. After continuing to stir for 1 hour, add 1.6 kg of ammonia water, stir for 5 minutes, filter, wash with water, and air-dry before entering the roasting furnace. -1 Calcined at 600°C for 1.5 hours under the water vapor, and the molecular sieve obtained after cooling is marked as CDY-3A, and then washed with ammonium chloride solution at 90°C for 10 minutes according to the ratio of molecular sieve: ammonium chloride: water = 1:0.1:10, and dried to obtain The finished molecular sieve is numbered CDY-3.

[0037] The content of rare earth oxide in CDY-3A measured by fluorescence method is 11.9% by weight...

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Abstract

This invention discloses crack catalyst to decrease olefin content in catalytic cracking gasoline, which is characterized in that there is 10~50 w.t% CDY molecular sieve in the catalyst that is prepared by exchanging method of solid-liquid combination; the rare earth content is 12~22 w.t% considering the quantity of rare earth oxide; all rare earth ion is in molecular sieve small cage; there is no peak at 0ppm in 27Al M AS NMR spectrogram. The catalyst can decrease olefin content in catalytic cracking gasoline greatly with well heavy oil conversion ability.

Description

technical field [0001] The invention relates to a cracking catalyst, and more specifically to a cracking catalyst for reducing the olefin content of catalytic cracking gasoline. Background technique [0002] Environmental protection regulations have put forward increasingly strict requirements on the quality of gasoline produced by the FCC process. For example, the World Fuel Specification gasoline olefin content class II standard is ≤20 volume%, and class III standard is ≤10 volume%. [0003] In order to reduce the olefin content of FCC gasoline, the strategy widely adopted at present is to use Y-type molecular sieves containing rare earths with high hydrogen transfer activity as active components, such as CN1317547A said catalyst is to use REY and PREY as active components, both of which The process of double-cross-two-baking is used to prepare the molecular sieve, which leads to high cost of the molecular sieve. [0004] I.Bresinska, K.J.Balkus, Jr. et al. [J.Phys.Chem.9...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05
Inventor 宋家庆范菁何鸣元
Owner CHINA PETROLEUM & CHEM CORP
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