Modified Y zeolite and preparation and application thereof

A zeolite, modified technology, applied in the field of modified Y zeolite and its application in catalytic cracking agent, can solve the problem of low yield of cracking catalyst gasoline

Active Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gasoline yield of the cracking catalyst prepared from the zeolite obtained by this method is not high

Method used

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  • Modified Y zeolite and preparation and application thereof
  • Modified Y zeolite and preparation and application thereof
  • Modified Y zeolite and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] At room temperature, get 200g NaY zeolite (dry basis accounts for 75% by weight), after beating with 1500g deionized water, add 45 grams (NH 4 ) 2 SO 4 and 11.3 mL of RECl 3 Solution (RE 2 o 3 The concentration is 270 g / L, the same below), rare earth salt (in RE 2 o 3 Calculate): ammonium salt: NaY zeolite: the weight ratio of deionized water is 0.02:0.3:1:10, 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 90° C. for exchange for 1 hour. After filtering and washing with deionized water, the filter cake was calcined at 600° C. in 100% water vapor for 2 hours to obtain a rare earth modified Y zeolite with a water content of 3% by weight.

[0057] Place the Y zeolite modified by the above rare earth in 2000g ethanol (99.9% by weight of ethanol content) at room temperature and stir evenly, add 10.5g zirconium nitrate Zr (NO 3 ) 4 ·5H 2 O, then stirred at room te...

Embodiment 2

[0059] At room temperature, take 200g of NaY zeolite (dry basis accounts for 75% by weight), after beating with 2250g of deionized water, add 75g of ammonium chloride and 22.2ml of RECl 3 Solution (concentration 270 g / L), rare earth salt (in RE 2 o 3 Meter): ammonium salt: NaY zeolite: the weight ratio of deionized water is 0.04:0.5:1:15, the pH value of the slurry is adjusted to 3.6 with dilute hydrochloric acid with a concentration of 5% by weight, and then the temperature is raised to 90° C. for exchange for 1 hour, After filtering and washing with deionized water, the filter cake was dried, and then calcined at 650° C. in 100% water vapor for 2 hours to obtain a rare earth modified Y zeolite with a water content of 2% by weight.

[0060] Place the above rare earth modified Y zeolite in 1500g ethanol (99.9% by weight) of ethanol at room temperature and stir evenly, add 15.7g zirconium oxychloride ZrOCl to the above slurry 2 ·8H 2 O, continue to stir at room temperature f...

Embodiment 3

[0062] At room temperature, take 200g of NaY zeolite (dry basis is 75% by weight), after beating with 3000g of deionized water, add 30g of ammonium chloride and 11.1ml of RECl 3 Solution (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. After filtering and washing with deionized water, the filter cake was dried and then calcined at 550° C. in 100% steam for 3 hours to obtain a rare earth modified Y zeolite with a water content of 3% by weight.

[0063] Put the Y zeolite modified by rare earth above in 1000g of n-hexane (n-hexane content 99.5% by weight) and stir evenly at room temperature, add 28.3g of zirconium isopropoxide C 15 h 36 o 5 Zr, continue to stir at room temperature for 3 hours, filter ...

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Abstract

Provided are modified Y zeolite and preparation and application thereof. The modified Y zeolite is prepared from, by oxide, 1-15 wt% of group IV B metal and 1-15 wt% of rare earth. The ratio of distorted tetrahedral-coordinated framework aluminum to tetrahedral-coordinated framework aluminum in the lattice structure of the modified Y zeolite is (0.2-0.8):1, and the ratio of the metal content on the surface of the zeolite to the metal content in the zeolite is not larger than 0.2. A preparation method of the modified Y zeolite comprises the steps that rare earth ion exchange calcination is carried out; Y zeolite with the water content not larger than 5 wt% is treated with an organic solvent and a modified metallic compound; calcination is carried out. The modified Y zeolite has high thermal and hydrothermal stability, and a cracking catalyst prepared from the modified Y molecular sieve has good activity and coke selectivity.

Description

technical field [0001] The invention relates to a modified Y zeolite and its application in catalytic cracking agent. 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 Active group member 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 widely used in FCC catalysts. It is generally believed that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24B01J29/08C10G11/05
Inventor 于善青田辉平许明德
Owner CHINA PETROLEUM & CHEM CORP
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