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Catalyst containing Y-type molecular sieve and preparation method thereof

A molecular sieve and catalyst technology, applied in the field of catalyst and its preparation, can solve problems such as uneven dealumination

Active Publication Date: 2021-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a method for preparing a catalyst including a Y-type molecular sieve modification process that can uniformly distribute aluminum and provide the catalyst for the problem of uneven dealumination in the prior art.

Method used

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  • Catalyst containing Y-type molecular sieve and preparation method thereof
  • Catalyst containing Y-type molecular sieve and preparation method thereof
  • Catalyst containing Y-type molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example illustrates the modification of Y molecular sieve by cesium ion exchange and oxalic acid dealumination.

[0032] 10g NH 4 Y molecular sieve (Changling Catalyst Factory provides, n(Si) / n(Al)=2.5, Na 2 0%=0.5%, the same below) Molecular sieves are added to 40mL distilled water, placed in 30 ℃ and stirred for beating, then add 3.37g cesium chloride (Aladdin Reagent (Shanghai) Co., Ltd.) wherein, the concentration of cesium chloride reaches 0.5mol / L, exchange for 1h, filter, wash and dry. The obtained sample was roasted at 550°C for 2h under 100% water vapor, then added to 100mL 0.05mol / L oxalic acid (Sinopharm Chemical Reagent Company, the same below) solution, the pH value was 4.5, heated to 100°C for 2h, filtered , After washing and drying, the resulting product is denoted as A. The results of elemental composition, bulk phase and surface composition characterization of molecular sieves are listed in Table 1.

Embodiment 2

[0040] This example illustrates the rubidium ion exchange and mixed acid dealumination modification of Y molecular sieve with hydrochloric acid and tartaric acid.

[0041] 10g NaY molecular sieve carries out ammonium exchange by the ammonium exchange method described in embodiment 1, makes NH 4 Y molecular sieve. The resulting NH 4 Add Y molecular sieve into 40mL distilled water, place it at 80°C to stir and make a slurry, then add 9.68g rubidium chloride (Aladdin Reagent (Shanghai) Co., Ltd.) to it, so that the concentration of rubidium chloride reaches 2mol / L, exchange for 0.5h, Filter, wash and dry. The obtained sample was calcined at 750° C. for 0.5 h under the condition of 100% water vapor. Add the obtained sample into the mixed solution of 50mL 0.5mol / L hydrochloric acid (Sinopharm Chemical Reagent Company, the same below) solution and 50mL 0.05mol / L tartaric acid (Sinopharm Chemical Reagent Company, the same below) solution, the pH value is 2.5, heat Treat at 60°C f...

Embodiment 3

[0046] This example illustrates the modification of Y molecular sieves by strontium ion exchange and citric acid dealumination.

[0047] 10g NH 4 Add Y molecular sieve into 40mL distilled water, place it at 20°C to stir and beat, then add 6.34g strontium chloride (Aladdin Reagent (Shanghai) Co., Ltd.) to it to make the concentration of strontium chloride reach 1mol / L, exchange for 2h, filter , wash and dry. The obtained sample was calcined at 600°C for 1 h under 100% water vapor, then added to 100 mL of 0.15 mol / L citric acid (Sinopharm Chemical Reagent Company, the same below) solution, the pH value was 5.0, and heated to 20°C for 12 h. After filtering, washing and drying, the product obtained is designated as C. The results of elemental composition, bulk phase and surface composition characterization of molecular sieves are listed in Table 1.

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Abstract

The invention provides a preparation method of a catalyst containing a Y-type molecular sieve, the catalyst is obtained by mixing, kneading, extruding and rolling mixed slurry of the Y-type molecular sieve, alumina sol, pseudo-boehmite, silica sol, clay, acid and water, the Y-type molecular sieve is an NH4Y molecular sieve prepared by carrying out ammonium exchange treatment on a NaY molecular sieve, and the NH4Y molecular sieve is a Y-type molecular sieve prepared by carrying out ammonium exchange treatment on the NH4Y molecular sieve. And contacting the obtained NH4Y molecular sieve with a salt solution containing alkali metal ions and / or a salt solution containing alkaline earth metal ions, filtering, washing, drying, carrying out hydrothermal aging on the obtained product, contacting with an acid solution, and recovering the product, wherein the alkali metal is selected from rubidium and cesium, and the alkaline earth metal is selected from strontium and barium.

Description

technical field [0001] The invention provides a catalyst containing Y-type molecular sieve and a preparation method thereof. Background technique [0002] At the end of the 1950s, Milton and Breck successfully synthesized Y-type molecular sieves. Due to the structure of NaY molecular sieves, SiO 2 / Al 2 o 3 The ratio is greater than that of X-type molecular sieve, so that the thermal stability and water stability are improved. In the early 1970s, Grace Company developed the directing agent method to synthesize NaY molecular sieves. The raw material was water glass instead of expensive silica sol. The process was simplified and the growth cycle was shortened, so that NaY molecular sieves were rapidly and widely used in petrochemical industries Petroleum cracking catalysis field. Among the hundreds of molecular sieves that have been developed so far, Y-type molecular sieve is the most widely used in industry. At present, the synthesis of NaY molecular sieves mainly adopts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J35/10
CPCB01J29/084B01J2229/16B01J2029/081B01J35/617B01J35/615B01J35/635B01J35/633B01J35/647Y02P20/52
Inventor 付强李永祥张成喜王子建胡合新
Owner CHINA PETROLEUM & CHEM CORP
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