Y molecular sieve modification method

A molecular sieve and modification technology, used in molecular sieve catalysts, chemical instruments and methods, catalyst carriers, etc., can solve the problems of reduced crystallinity and less secondary pores of Y molecular sieves, and achieve the improvement of silicon-aluminum ratio, increase of secondary pores, good practical effect

Active Publication Date: 2006-07-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the modification method of the above-mentioned Y molecular sieve is that the crystallinity of the Y molecular sieve after modification is reduced more, and the secondary pores are also few.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare it with the ratio of 5g of NaY molecular sieve: 6.5g of ammonium sulfate: 50mL of water, and put it into a three-necked flask. The ion exchange temperature is 95°C for 1h, then, filter, wash, and then use a solution of 6.5g ammonium sulfate: 50mL of water for secondary ion exchange, finally filter, wash the wet filter cake, and roast at 600°C for 2h.

[0028] Grind the Y molecular sieve after exchange and hydrothermal treatment into powder, take 5.0g in a three-necked flask; weigh 6.5g of ammonium sulfate and add 50mL of water to prepare a solution, and then add 1.0g of surfactant hexadecyl Trimethylammonium bromide (CTAB), stir evenly; add it into the flask, heat it in a water bath to 100°C, then add 35mL of 10% oxalic acid and ammonium oxalate solution, stir for 4h, put it in an autoclave, and Under 120 ℃ hydrothermal crystallization for 12h. Filter, dry, and bake at 500°C for 6h. The modified Y molecular sieve 1 was obtained.

Embodiment 2

[0030] Prepare it with the ratio of 5g of NaY molecular sieve: 6.5g of ammonium sulfate: 50mL of water, and put it into a three-necked flask. The ion exchange temperature is 95°C for 1h, then, filter, wash, and then use a solution of 6.5g ammonium sulfate: 50mL water for secondary ion exchange, finally filter, wash the wet filter cake, and roast at 600°C for 2h.

[0031] Grind the Y molecular sieve after exchange and hydrothermal treatment into powder, take 5.0g in a three-necked flask; weigh 6.5g of ammonium sulfate and add 50mL of water to prepare a solution, then add 1.0g of surfactant CTAB and stir evenly Add it into a flask, heat it in a water bath to 100°C, then add 45mL of 10% oxalic acid and ammonium oxalate solution, stir for 4 hours, put it in an autoclave, and conduct hydrothermal crystallization at a certain temperature of 120°C for 12h. Filter, dry, and bake at 500°C for 6h. The modified Y molecular sieve 2 was obtained.

Embodiment 3

[0033] Prepare it with the ratio of 5g of NaY molecular sieve: 6.5g of ammonium sulfate: 50mL of water, and put it into a three-necked flask. The ion exchange temperature is 95°C for 1h, then, filter, wash, and then use a solution of 6.5g ammonium sulfate: 50mL water for secondary ion exchange, finally filter, wash the wet filter cake, and roast at 600°C for 2h.

[0034]Grind the Y molecular sieve after exchange and hydrothermal treatment into powder, take 5.0g in a three-necked flask; weigh 6.5g of ammonium sulfate and add 50mL of water to prepare a solution, then add 1.0g of surfactant CTAB and stir evenly Add it into a flask, heat it in a water bath to 100°C, then add 55mL of 10% oxalic acid and ammonium oxalate solution, stir for 4h, put it in an autoclave, and conduct hydrothermal crystallization at a certain temperature of 120°C for 12h. Filter, dry, and bake at 500°C for 6h. The modified Y molecular sieve 3 was obtained.

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Abstract

The invention relates to a modifying method for Y molecular sieve, which comprises: using industrial NaY molecular sieve as material for ammonium exchange, baking deeply; then, adding surfactant during dealumination with acid. This invention obtains HY molecular sieve with high SiO2/Al2O3(9~15) and crystallinity, improves secondary pores and acid structure compared with the industrial NaY, and fits to be carrier for hydrotreating catalyst for heavy distilled oil.

Description

technical field [0001] The invention relates to a modification method of Y molecular sieve. Specifically, the combination of oxalic acid dealumination and surfactant is used to dealuminate NaY molecular sieves and form more secondary pores. Background technique [0002] Due to the different methods of preparing Y molecular sieves, the resulting products are also called differently. One is called ultra-stable Y (USY), which is a product obtained by a single hydrothermal method. As introduced in patents USP3293192, USP3781199, USP4036739, etc., sodium-type molecular sieves are ion-exchanged and then calcined at high temperature in the presence of water vapor, and it is possible to repeat the above steps many times to obtain low-sodium oxides with a higher skeleton silicon-aluminum ratio. Ultrastable Y molecular sieve. The samples obtained by this method contain a large amount of non-framework aluminum. The other is called dealuminated Y molecular sieve (DAY), which is prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24B01J32/00B01J29/08
Inventor 刘百军冯智高山松
Owner BC P INC CHINA NAT PETROLEUM CORP
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