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Modified Y zeolite and its preparation method and application

A zeolite and modification technology, applied in the field of preparation of modified Y zeolite, can solve the problems of low yield of catalytically cracked gasoline, poor hydrothermal stability, and difficulty in meeting catalytic cracking, and achieve improved coke selectivity, high heat and water Thermal stability, the effect of improving the conversion rate of heavy oil

Active Publication Date: 2018-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the metal (non-rare earth metal) modified Y-type zeolite prepared by the traditional liquid-phase ion exchange method or impregnation method has poor hydrothermal stability, and the yield of catalytic cracking gasoline is not high, so it is difficult to meet the requirements of catalytic cracking. Require

Method used

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  • Modified Y zeolite and its preparation method and application
  • Modified Y zeolite and its preparation method and application
  • Modified Y zeolite and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] At room temperature, get 200g NaY zeolite (dry basis 75% by weight), after beating with 1500g deionized water, add 45 grams (NH 4 ) 2 SO 4 and 11.3 mL of RECl 3 Aqueous solution (RE 2 o 3 Concentration 270 g / L), rare earth salt (in RE 2 o 3 The weight ratio of ammonium salt: NaY zeolite: deionized water is 0.02:0.3:1:10, the pH value of the slurry is adjusted to 3.8 with 5% by weight of dilute hydrochloric acid, then heated to 90°C for 1 hour, filtered and used Washing with deionized water, roasting the filter cake at 600°C and 100% water vapor for 2 hours to obtain rare earth modified Y zeolite RE(2)-Y, the water content of which is 3% by weight;

[0039] Get 12ml ethanol and add 180ml deionized water, add 5mol / L acetic acid aqueous solution 3ml, adjust solution pH value to 3.7 with 10mol / L ammonium hydroxide aqueous solution, then add 10.5g zirconium nitrate Zr (NO 3 ) 4 ·5H 2 O is dissolved in the above buffer solution to obtain an impregnating solution. Mix...

Embodiment 2

[0041] At room temperature, take 200g NaY zeolite (dry basis 75% by weight), after beating with 2250g deionized water, add 75g ammonium chloride and 22.2ml RECl 3 Aqueous solution (RE 2 o 3 270 g / L), rare earth salts (in RE 2 o 3Calculated): ammonium salt: NaY zeolite: the weight ratio of deionized water is 0.04:0.5:1:15, the pH value of the slurry is adjusted to 3.6 with 5% dilute hydrochloric acid, then the temperature is raised to 90 ° C for 1 hour, filtered and used Washing with ionized water, drying the filter cake, and then roasting at 650° C. and 100% water vapor for 2 hours to obtain rare earth modified Y zeolite RE(4)-Y, the water content of which is 2% by weight;

[0042] Get 12ml of ethanol and add 180ml of deionized water, continue to add 3ml of acetic acid aqueous solution with a concentration of 5mol / L acetic acid, adjust the pH value to 4.5 with a concentration of 10mol / L ammonium hydroxide aqueous solution, and dissolve 15.7g of zirconium oxychloride ZrOCl ...

Embodiment 3

[0044] At room temperature, get 200g NaY zeolite (dry basis 75% by weight), after beating with 3000g deionized water, add 30 grams of ammonium chloride and 11.1 milliliters of RECl 3 Solution (RE 2 o 3 Concentration 270 g / L), rare earth salt (in RE 2 o 3 Meter): ammonium salt: NaY zeolite: the weight ratio of deionized water is 0.02:0.2:1:20, the pH value of the slurry is adjusted to 3.8 with dilute hydrochloric acid with a concentration of 5% by weight, and then the temperature is raised to 85° C. for exchange for 2 hours. Filter and wash with deionized water, dry the filter cake, and then roast at 550°C and 100% water vapor for 3 hours to obtain rare earth modified Y zeolite RE(2)-Y with a water content of 3% by weight;

[0045] Get 12ml ethanol and add 180ml deionized water, continue to add 5mol / L acetic acid aqueous solution 3ml, obtain mixed solution, adjust the pH value of described mixed solution with 10mol / L ammonium hydroxide aqueous solution to be 3.2, obtain buff...

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Abstract

Modified Y zeolite and its preparation method and application. The preparation method of the modified Y zeolite comprises: ion-exchanging the Y-type zeolite with a rare earth salt solution or a mixed solution of a rare earth salt and an inorganic ammonium salt, and dehydrating the water in the molecular sieve. The content is not higher than 5% by weight, the IVB group metal compound is immersed in the buffer solution, and roasted. The modified Y-type zeolite obtained by the method can replace the rare-earth modified Y-type zeolite for catalytic cracking, has higher heavy oil cracking capacity, higher light oil yield and significantly improved coke selectivity.

Description

technical field [0001] The invention relates to a preparation method of a modified Y zeolite and an application method of the modified Y zeolite in a catalytic cracking catalyst. Background technique [0002] With the increasingly heavy catalytic cracking raw oil, it is required that the catalytic cracking catalyst should have higher activity and higher hydrothermal stability at the same time, so as to improve the conversion of heavy oil and the ability to resist heavy metal pollution. Therefore, the main The active component Y zeolite has high thermal and hydrothermal stability, and maintains a suitable distribution of acidic active centers. In order to obtain the Y zeolite with the above properties, the artificially synthesized NaY zeolite is usually modified. Commonly used modification methods include ion exchange, ultra-stabilization treatment, and rare earth modification. Among them, the rare earth modified Y zeolite has high thermal and hydrothermal stability, and is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/24B01J29/08
Inventor 于善青田辉平许明德
Owner CHINA PETROLEUM & CHEM CORP
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