Modified octahedral zeolite

A faujasite and modification technology, which is applied in the field of the catalytic cracking reaction process of modified zeolite containing phosphorus and rare earth elements and hydrocarbons, can solve the problems of long production cycle, complex modification process, low utilization rate of phosphorus, etc. The production cost is reduced, the product selectivity is good, and the preparation process is simple.

Inactive Publication Date: 2005-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcoming of the prior art is that the modification process is complicated. For example, the ultra-stabilization and phosphorus modification processes of zeolite are all carried out step by step, and the production cycle is long; Phosphorus modification treatment is carried out, and the utilization rate of phosphorus is low (generally less than 60%)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take 3 kg of NaY (dry basis), add 22.2 liters of deionized water, make a slurry, and add 1.44 kg of ammonium sulfate and 8.1 liters of ammonium phosphate. Use 3 mol / liter of hydrochloric acid to adjust the pH of the slurry to 3.8, raise the temperature, and react at 82°C for 50 minutes, then slowly add 0.90 liter of rare earth solution under stirring, continue to react for 30 minutes, filter and wash with water, and the filter cake will be cooled at 620-640°C , Calcined for 1.5 hours under the condition of 80% water vapor to obtain the modified faujasite-1 of the present invention.

[0038] With 2.50 kilograms of kaolin (dry basis), 1.74 kilograms of modified faujasite-1 and 0.20 kilograms of ZSM-5 zeolite obtained using the above method, 3.26 kilograms of aluminum sol and 7.5 kilograms of deionized water were mixed and beaten, stirred for 1.5 hours, and passed through the colloid After grinding, it is spray-dried to shape. The obtained microspheres were calcined at 40...

Embodiment 2

[0040] Take 3 kg of NaY (dry basis), add 21.0 liters of deionized water, make a slurry, and add 1.20 kg of ammonium chloride and 4.0 liters of ammonium phosphate. Use 2 mol / liter of hydrochloric acid to adjust the pH of the slurry to 3.0, raise the temperature, and react at 89°C for 30 minutes, then slowly add 0.45 liter of rare earth solution under stirring, continue to react for 30 minutes, filter and wash with water, and the filter cake will be cooled at 600-620°C , Calcined for 2.5 hours under the condition of 100% water vapor to obtain the modified faujasite-2 of the present invention.

[0041] Adopt the same condition as embodiment 1 to prepare catalyst, just change modified faujasite-1 into modified faujasite-2, add 0.20 kilograms of beta zeolite in addition, kaolin changes halloysite, add-on is constant, The phosphorus and rare earth composite modified zeolite catalyst-2 of the present invention is obtained.

Embodiment 3

[0043] Take 3 kilograms of NaX (dry basis), add 31.50 liters of deionized water, make a slurry, and add 1.30 kilograms of ammonium chloride and 64 grams of diammonium hydrogen phosphate. Use 2 mol / liter of hydrochloric acid to adjust the pH of the slurry solution to 4.0, raise the temperature, and react at 92°C for 30 minutes. Then slowly add 0.31 liter of rare earth nitrate solution under stirring, continue to react for 10 minutes, filter and wash with water, and the filter cake is at 600-620 ℃, 100% steam for 1.0 hour to obtain the modified faujasite-3 of the present invention.

[0044] With 2.45 kg of kaolin (dry basis), 1.5 kg of modified faujasite-1 and 0.40 kg of modified faujasite-3, 3.89 kg of silica sol and 7.0 kg of deionized water were mixed for beating and stirred for 1.2 hours , after passing through a colloid mill, it is spray-dried and shaped. The resulting microspheres were calcined at 410°C for 0.6 hours. Take 2 kg of calcined microspheres, add 10 kg of deio...

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Abstract

A modified faujasite is obtained by exchanging the faujasite with a phosphorus compound and an ammonium compound, and then introducing a rare earth solution into the exchange slurry for further reaction, filtering, washing, and roasting with water vapor. Mix the zeolite component, clay and the precursor of the high-temperature-resistant inorganic oxide uniformly in a certain proportion, spray molding, and washing. The prepared catalyst has good activity and stability, high gasoline yield, low coke yield, and heavy oil Strong cracking ability and heavy metal pollution resistance.

Description

technical field [0001] The present invention relates to a modified faujasite, more specifically, the present invention relates to a modified zeolite containing phosphorus and rare earth elements, which is mainly used in the catalytic cracking reaction process of hydrocarbons. Background technique [0002] As the crude oil for catalytic cracking becomes heavier, it is required to improve the cracking catalyst activity and product selectivity. The activity of Y-type zeolite after rare earth exchange is greatly improved, but the selectivity of cracked products becomes worse due to the increase of hydrogen transfer activity. In order to solve the above problems, two measures have been taken. One is to reduce the rare earth content of the active components of molecular sieves, such as USP4218307 and CN87104086, and the other is to change the introduction of rare earths, such as CN86107531A, CN86107598A, and introduce them into Y-type molecular sieves in the form of precipitated r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/20C10G11/05
Inventor 刘从华高雄厚张忠东丁伟滕秋霞
Owner PETROCHINA CO LTD
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