Rare earth Y molecular screen and process for preparing the same

A technology of molecular sieves and rare earth ions, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of high cost of molecular sieves, and achieve the effect of avoiding the loss of rare earths

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

Said catalyzer as CN1317547A is active component with REY and PREY, and they all adopt the preparation technology of two-cross-two-baking, cause the cost of molecular sieve to be on the high side

Method used

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  • Rare earth Y molecular screen and process for preparing the same
  • Rare earth Y molecular screen and process for preparing the same
  • Rare earth Y molecular screen and process for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get 18.6 kilograms of NaY molecular sieves (Changling Oil Refinery Chemical Plant Catalyst Plant, ignition loss 24.9 weight%, silicon-aluminum ratio is 5.2) and 140 kilograms of deionized water join in the reactor, then add 2.1 kilograms of ammonium sulfate thereinto, 90 ℃ 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 recorded as CDY-1A, washed with ammonium chloride solution at 60°C for 10 minutes according to the ratio of molecular sieve:ammonium chloride:water=1:0.1:10, and d...

Embodiment 2

[0031]Get 18.6 kilograms of NaY molecular sieves (Changling Oil Refinery Chemical Plant Catalyst Plant, ignition loss 24.9 weight%, silicon-aluminum ratio is 5.2) and 140 kilograms of deionized water join in the reactor, then add 2.1 kilograms of ammonium sulfate thereinto, 90 ℃ 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. : ammonium chloride: water = 1:0.1:10, washed with ammonium chlor...

Embodiment 3

[0035] 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.

[0036] 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 a rare earth Y molecular sieve and preparation; wherein, the rare earth content is 12~22 w.t% considering the quantity of rare earth oxide in molecular sieve, all rare earth ion is in molecular sieve small cage; there is no peak at 0ppm in 27Al M AS NMR spectrogram. The step to obtain molecular sieve comprises: exchanging NaY molecular sieve liquid with ammonium salt or not, taking ion exchange with rare earth chloride by weight ratio of NaY dry basis:RECl3=1:0.17~0.35 at temperature 5~100Deg; pH=2.5~7.5, water: NaY=3~50; adjusting pH value to 8~11 with alkaline solution; mixing, filtering, cleaning, drying; baking for more than 0.1h with 0~100% vapor at temperature 200~950Deg; then, dealing with the molecular sieve according to weight ratio molecular sieve dry basis: ammonium salt :water=1:0~1:2~50 at temperature 60~100Deg; finally, cleaning, filtering, drying and obtaining the product.

Description

technical field [0001] The present invention relates to a Y molecular sieve and its preparation method, and more specifically relates to a rare Y molecular sieve and its preparation method. 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 widely used strategy is to use rare earth-containing Y-type molecular sieves with high hydrogen transfer activity as active components. Said catalyzer as CN1317547A is active component with REY and PREY, and they all adopt the preparation technology of two-cross-two-baking, cause the cost of molecular sieve to be on the high side [0004] I.Bresinska, K.J.Balkus, Jr. et al. [J.Phys.Chem.98 (1994) 12989~12994] have ...

Claims

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Application Information

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