Cracking catalyst for reducing alkene content in catalytically cracked gasoline

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

Active Publication Date: 2007-06-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 18.6 kg of NaY molecular sieve (Changling Oil Refinery Catalyst Plant, ignition loss 24.9% by weight, silicon to aluminum ratio of 5.2) and 140 kg of deionized water are added to the reactor, and then 2.1 kg of ammonium sulfate is added to it, 90°C After stirring for 5 minutes, adjust the pH of the system to between 3.5 and 5.5 with hydrochloric acid, continue stirring for 1 hour and then filter. Add 140 kilograms of water to the filter cake, then add 5.3 kilograms of solid lanthanum chloride, stir at 90°C for 2 hours, add 1.5 kilograms of sodium metaaluminate solution and 1.2 kilograms of ammonia, stir for 5 minutes, filter, wash with water, air-dried, and enter the roaster , At a weight airspeed of 0.5 -1 It is calcined at 550°C for 1.5 hours under high water vapor, and the molecular sieve obtained after cooling is referred to as CDY-1A. The molecular sieve: ammonium chloride: water=1:0.1:10 is washed with ammonium chloride solution at 60°C for 10 minutes, and dried ...

Embodiment 2

[0032] Take 18.6 kg of NaY molecular sieve (Changling Oil Refinery Catalyst Plant, ignition loss 24.9% by weight, silicon to aluminum ratio of 5.2) and 140 kg of deionized water are added to the reactor, and then 2.1 kg of ammonium sulfate is added to it, 90°C After stirring for 5 minutes, adjust the pH of the system to between 3.5 and 5.5 with hydrochloric acid, continue stirring for 1 hour and then filter. Add 140 kg of water to the filter cake, 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, adjust the pH of the system to between 3.5 and 5.5 with hydrochloric acid, continue After stirring for 1 hour, add 2.2 kilograms of water glass solution and 1.3 kilograms of ammonia, stir for 5 minutes, filter, wash with water, air-dried, enter the roaster, roast at 550°C for 1.5 hours, and cool down to obtain molecular sieve as CDY-2A, and then press molecular sieve : Ammoni...

Embodiment 3

[0036] Take 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 to the reactor, and then 5.3 liters of rare earth chloride solution is added to it. After stirring for 5 minutes at ℃, adjust the pH of the system to between 3.5 and 5.5 with hydrochloric acid. After stirring for 1 hour, add 1.6 kg of ammonia water, stir for 5 minutes, filter, wash with water, air-dried, and enter the roaster at a weight space velocity of 0.2 o'clock. -1 It is calcined at 600°C for 1.5 hours under high water vapor, and the molecular sieve obtained after cooling is recorded as CDY-3A, and then washed with ammonium chloride solution at 90°C for 10 minutes at 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] According to fluorescence method, the content of rare earth oxide in CD...

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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 present invention relates to a cracking catalyst, and more particularly to a cracking catalyst for reducing the olefin content of FCC gasoline. Background technique [0002] Environmental protection laws and regulations have put forward increasingly stringent requirements on the quality of gasoline produced by the FCC process. For example, the world fuel standard gasoline olefin content standard II is ≤20% by volume, and the Type III standard is ≤10% by volume. [0003] In order to reduce the content of olefins in FCC gasoline, the currently widely adopted strategy is to use rare earth-containing Y-type molecular sieves with high hydrogen transfer activity as active components. For example, the catalyst described in CN1317547A uses REY and PREY as active components. It is prepared by a two-cross and two-baking process, which leads to high cost of molecular sieve. [0004] I. Bresinska, KJ Balkus, Jr. et al. [J.Phys.Chem.98(1994)12989~12994] studied the ...

Claims

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Application Information

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Patent Type & Authority Patents(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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