A kind of preparation method of Y-type molecular sieve containing rare earth

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 problems such as the reduction of silicon-aluminum ratio of molecular sieves, achieve the improvement of rare earth utilization rate, improve patency, and improve ultra-stable level of effect

Active Publication Date: 2012-02-22
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, alkali treatment will also lead to a decrease in the silicon-aluminum ratio of the molecular sieve

Method used

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  • A kind of preparation method of Y-type molecular sieve containing rare earth
  • A kind of preparation method of Y-type molecular sieve containing rare earth
  • A kind of preparation method of Y-type molecular sieve containing rare earth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 30 grams of sodium hydroxide and dissolve it in 970 grams of distilled water, stir evenly to make an alkali solution and then heat up to 85°C. Get 200 grams (dry basis) NaY molecular sieve (sample name Y-A, crystallinity 95%, SiO 2 / Al 2 o 3 = 6.15, self-synthesized with reference to the method described in CN1785808), added to the above alkaline solution, stirred at 85°C for 2 hours, filtered, fully washed with deionized water until the pH of the filtrate was less than 10, collected samples and dried.

[0037] Get 30 grams of above-mentioned alkali treatment product, mix with 20mL rare earth chloride solution (RE 2 o 3content 300g / L) were added into 300 g of distilled water and stirred evenly, and then stirred and exchanged at 70°C for 1 hour. During the exchange process, 1mol / L hydrochloric acid solution was used to adjust the pH value of the exchange slurry to 3.5 and maintain it. After the exchange is completed, filter and fully wash with water to obtain ...

Embodiment 2

[0041] Put the rare earth ion-exchanged product in Example 1 in a muffle furnace at 550°C for 2 hours, and then conduct an ion exchange on the obtained product according to the rare earth ion exchange conditions described in Example 1, and then place it again at 550°C Roasted in a muffle furnace for 2 hours, the obtained molecular sieve sample was rinsed with 300 g of an ammonium salt solution with a temperature of 60 ° C and an ammonium chloride content of 5 wt%, and then washed with water and dried. The resulting product was named REY-A, and its Na 2 0.32 wt% residual O, RE 2 o 3 The content is 22.1% by weight, and the rare earth utilization rate is 55.3%.

Embodiment 3

[0045] Dissolve 100 grams of sodium hydroxide in 1000 grams of distilled water, stir evenly to make an alkali solution, cool it, and then place it in an ice-water mixed bath to keep the temperature constant. Take by weighing 200 grams of NaY molecular sieves (mass on a dry basis, sample name Y-A, crystallinity 95%, skeleton SiO 2 / Al 2 o 3 =6.15) Add the above-mentioned alkali solution, treat with alkali in an ice-water bath at 0°C for 20 minutes under continuous stirring, then filter and wash until the pH of the filtrate is less than 10, then collect samples and dry them.

[0046] Take out 50 grams from above-mentioned alkali treatment sample, carry out ion exchange treatment to this molecular sieve according to the ion exchange condition described in embodiment 1, Na in the gained product 2 O residues are 4.33% by weight, RE 2 o 3 The content is 13.8% by weight, and the rare earth utilization rate is 69%.

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Abstract

The invention provides a method for preparing a rare earth-containing Y-type molecular sieve. The method includes firstly performing alkali treatment and modification on the raw material Y molecular sieve, and then performing ion exchange on the alkali-treated molecular sieve, or further performing hydrothermal ultra-stable treatment on it. , to obtain a rare earth Y-type molecular sieve or a rare earth ultra-stable Y-type molecular sieve. The alkali treatment condition is to mix NaY molecular sieve and alkali solution evenly according to the mass ratio of NaY (dry basis): alkali: H2O=(0.1~2): (0.05~2): (4~15). Alkali treatment is carried out on the molecular sieve under the temperature condition of 120° C. for 0.1 to 24 hours. The evaluation results of the catalytic cracking reaction show that the catalyst prepared by using the rare earth Y-type molecular sieve modified by the method of the present invention and the rare earth ultra-stable Y-type molecular sieve as active components has high micro-reaction activity when used for heavy oil cracking.

Description

technical field [0001] The present invention relates to a preparation method of rare earth-containing Y-type molecular sieves, and furthermore relates to carrying out rare earth ion exchange or mixed exchange of rare earth ions and ammonium ions on NaY molecular sieves modified by alkali treatment, and on the basis of this. Hydrothermal ultrastabilization to prepare rare earth-containing modified Y molecular sieves. Background technique [0002] Y-type molecular sieve after rare earth ion exchange (REY, also known as rare earth Y-type molecular sieve) is one of the main active components of the most important cracking catalyst in the petroleum refining industry. The rare earth ions in the molecular sieve can not only stabilize the molecular sieve framework, but also generate a large amount of protonic acid by polarizing water, and can also act as a Lewis acid for acid catalysis, and its acid strength increases with the increase of the rare earth ion exchange degree. Increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08
Inventor 申宝剑覃正兴高雄厚王宝杰庞新梅秦松赵红娟张君屹刘从华谢帅郭慧郭巧霞曾鹏晖孙国峰申伟王国峰林枫赵晓争主明烨
Owner BC P INC CHINA NAT PETROLEUM CORP
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