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Method for synthesizing Beta molecular sieve through hydrothermal treatment

A technology of hydrothermal treatment and synthesis method, applied in the direction of molecular sieve catalyst, molecular sieve and base exchange compound, chemical instrument and method, etc.

Inactive Publication Date: 2017-11-07
江苏有容催化技术研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for synthesizing Beta molecular sieve through hydrothermal treatment
  • Method for synthesizing Beta molecular sieve through hydrothermal treatment
  • Method for synthesizing Beta molecular sieve through hydrothermal treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Exchange 1.0 g of Beta molecular sieve (on a dry basis) synthesized without organic templates with 15 g of an aqueous solution containing 3.0 g of inorganic ammonium salt at 100 ° C for 20 minutes, and then use 15 g of aqueous solution containing 1.0 g (NH 4 ) 2 SO 4 The aqueous solution was exchanged once, filtered, and washed to remove SO 4 2- , dried at 100°C.

[0025] (2) Intermediate roasting: Place the sample after (1) exchange in a muffle furnace, raise the temperature to 510° C. at room temperature, and keep the temperature constant for 3 hours.

[0026] (3) Use 60g of roasted zeolite containing 3.0g (NH 4 ) 2 SO 4 The aqueous solution was exchanged at 100°C for 30 minutes, filtered and repeated exchanged once, filtered, and washed to remove SO 4 2- ion.

[0027] (4) Press the above-mentioned filter cake, place it in a crucible, put it in a muffle furnace, heat it up to 560°C, 650, and 760°C for 1 hour and bake it for 4 hours.

Embodiment 2

[0029] (1) Exchange 1.0 g of Beta (on a dry basis) synthesized without an organic template with 15 g of an aqueous solution containing 3.0 g of inorganic ammonium salt at 100° C. for 20 minutes, and then filter it with 15 g of an aqueous solution containing 1.0 g (NH 4 ) 2 SO 4 The aqueous solution was exchanged once, filtered, and washed to remove SO 4 2- , dried at 100°C.

[0030] (2) Intermediate roasting: Place the sample after (1) exchange in a muffle furnace, raise the temperature to 510° C. at room temperature, and keep the temperature constant for 3 hours.

[0031] (3) Use 60g of roasted zeolite containing 3.0g (NH 4 ) 2 SO 4 The aqueous solution was exchanged at 100°C for 30 minutes, filtered and repeated exchanged once, filtered, and washed to remove SO 4 2- ion.

[0032] (4) Put the exchanged zeolite into a roasting furnace and roast for 3-8 hours at 560, 650, 750 and 800° C. under the condition of 100% water vapor atmosphere.

Embodiment 3

[0034] Exchange 1.0 g of Beta (on a dry basis) synthesized without an organic template with 50 g of an aqueous solution containing 4.0 g of ammonium nitrate at 80°C for 2 hours, filter and wash with deionized water, dry it, and place it in a muffle furnace , heat up to 500°C and bake for 3 hours. Repeat the above steps once to obtain a hydrogen-type molecular sieve containing little sodium.

[0035] The prepared sample was then exchanged with 50 g of an aqueous solution containing 4.0 g of ammonium nitrate at 80° C. for 1 hour, and the wet sample was placed in a roasting furnace for 1 hour at 800° C. under a 100% water vapor atmosphere.

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Abstract

The present invention relates to a method for synthesizing a Beta molecular sieve through hydrothermal treatment. The method comprises: (1) exchanging most of Na<+> in a sodium type Beta molecular sieve obtained through an organic-templating-agent-free synthesis method with NH4<+>; and (2) washing and filtering the obtained molecular sieve, pressing the filter cake, placing into a crucible, and calcining at a temperature of 500-800 DEG C in a 100% steam atmosphere. According to the present invention, the Si / Al ratio of the Beta molecular sieve is increased, and along with the formation of the mesopores, the crystallinity is not substantially decreased; in the VGO catalytic cracking reaction, the molecular sieve can effectively reduce the coke production while can increase the yield of the high added value product; and the molecular sieve can be used for directly preparing the catalytic cracking catalyst, can be subjected to ammonium exchange so as to further reduce the Na2O amount and be used for preparing the catalytic cracking catalyst, and can further be combined with the chemical aluminum-removing and silicon-supplementing method so as to prepare the catalyst having the excellent performance.

Description

1. Technical field [0001] The invention relates to a method for synthesizing Beta molecular sieves by hydrothermal treatment, which belongs to the field of chemistry and chemical engineering, and in particular relates to the field of synthesis of Beta molecular sieves. 2. Background technology [0002] Catalytic cracking of petroleum hydrocarbons is the main means of producing gasoline and diesel. At present, the active component of the catalyst commonly used in catalytic cracking reactions in industry is the super-temperature Y zeolite obtained after Y molecular sieve treatment; because it satisfies people’s desire for more catalysts to be blended with refinery residue and can produce more high-octane gasoline Requirements, and to a wide range of research and application. [0003] Compared with Y zeolite molecular sieve, Beta zeolite is the only molecular sieve with a three-dimensional, twelve-membered ring pore structure among high-silica molecular sieves. Aluminum ratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02B01J29/70
CPCC01B39/026B01J29/7007C01P2002/72C01P2002/82
Inventor 胡思潘亚军葛轶强
Owner 江苏有容催化技术研究所有限公司
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