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SAPO-34/EU-1 composite molecular sieve and synthetic method thereof

A SAPO-34, composite molecular sieve technology, applied in the field of molecular sieve catalytic material synthesis, can solve the problems of difficult control of composite structure, insufficient physicochemical properties of composite molecular sieve, affecting adsorption and catalytic performance, etc., to achieve improved physicochemical properties and catalytic activity, good MTO Catalytic activity, effect of avoiding crystallinity drop

Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, there are still many defects and deficiencies in the synthesis technology of composite molecular sieves, which cause some deficiencies in the physical and chemical properties of composite molecular sieves.
For example, the composite structure of composite molecular sieves is not easy to control, and the acid properties are also difficult to adjust.
Moreover, many composite molecular sieves are synthesized by a two-step method, which easily causes damage to the first component during the compounding process, which reduces the physical and chemical properties of the composite molecular sieve, thereby affecting the adsorption and catalytic performance.

Method used

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  • SAPO-34/EU-1 composite molecular sieve and synthetic method thereof

Examples

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Effect test

Embodiment 1

[0033] (1) Dissolve 40 g of glucose in 100 mL of distilled water, add 8 g of EU-1 molecular sieve into the glucose solution under stirring, stir for 30 min, place the mixture in an ultrasonic cleaner for 2 h, and then The mixture was filtered, and the obtained product was dried at 120° C. for 12 h, and then calcined at 500° C. for 2 h in a nitrogen atmosphere to obtain a pretreated EU-1 molecular sieve.

[0034] (2) Dissolve 11 g of aluminum isopropoxide in 45 mL of distilled water and stir for 30 min. Then add 4.6mL of phosphoric acid and stir for 30 min. Add 5 mL of ethyl orthosilicate and stir for 30 min. Then 4 mL of ethylenediamine was added and stirred for 30 min. Then add 8 g of EU-1 prepared in step (1) and stir for 30 min; then put it into a closed reactor and crystallize in an oven at 200 °C for 50 h. Then the obtained product was washed 4 times with distilled water to neutrality, then dried at 120°C for 12 hours, and finally calcined at 500°C for 2 hours in an ai...

Embodiment 2

[0036] (1) Dissolve 40 g of glucose in 100 mL of distilled water, add 8 g of EU-1 molecular sieve into the glucose solution under stirring, stir for 30 min, place the mixture in an ultrasonic cleaner for 2 h, and then The mixture was filtered, and the obtained product was dried at 120° C. for 12 h, and then calcined at 500° C. for 2 h in a nitrogen atmosphere to obtain a pretreated EU-1 molecular sieve.

[0037] (2) Dissolve 10 g of aluminum isopropoxide in 45 mL of distilled water and stir for 30 min. Then 5 mL of phosphoric acid was added and stirred for 30 min. Add 8 mL of ethyl orthosilicate and stir for 30 min. Then 10 mL of ethylenediamine was added and stirred for 30 min. Then add 8 g of EU-1 prepared in step (1) and stir for 30 min; then put it into a closed reactor and crystallize in an oven at 210 °C for 45 h. Then the obtained product was washed 4 times with distilled water to neutrality, then dried at 120°C for 12 hours, and finally calcined at 500°C for 2 hours...

Embodiment 3

[0039] (1) Dissolve 35 g of glucose in 100 mL of distilled water, add 7 g of EU-1 molecular sieve into the glucose solution under stirring conditions, stir for 30 min, place the mixture in an ultrasonic cleaner for 2 h, and then place the mixture After filtering, the obtained product was dried at 120° C. for 12 hours, and then calcined at 550° C. for 1.5 hours in a nitrogen atmosphere to obtain a pretreated EU-1 molecular sieve.

[0040] (2) Dissolve 8.5g of aluminum isopropoxide in 50 mL of distilled water and stir for 30 min. Then add 4.6mL of phosphoric acid and stir for 30 min. Then add 7g of white carbon black and stir for 30 min. Then 7 mL of ethylenediamine was added and stirred for 30 min. Then 6 g of EU-1 prepared in step (1) was added and stirred for 30 min; then it was placed in a closed reactor and crystallized in an oven at 180 °C for 60 h. Then the obtained product was washed 4 times with distilled water to neutrality, then dried at 120°C for 12 hours, and fin...

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Abstract

The invention provides an SAPO-34 / EU-1 composite molecular sieve. The SAPO-34 / EU-1 composite molecular sieve has the following two crystal forms at the same time: an EU-1 molecular sieve and an SAPO-34 molecular sieve. The synthetic method for the SAPO-34 / EU-1 composite molecular sieve provided by the invention comprises the following steps: adding the EU-1 molecular sieve into a glucose solution for ultrasonic treatment and carrying out filtering, drying and roasting so as to obtain a treated EU-1 molecular sieve; then mixing water, an alkali source, a template agent, an aluminum source and a silicon source with the treated EU-1 molecular sieve; and carrying out crystallization at a temperature of 150 to 240 DEG C for 15 to 100 h so as to obtain the SAPO-34 / EU-1 composite molecular sieve. According to the invention, glucose is introduced into the pores of the EU-1 molecular sieve and becomes carbon after roasting; the carbon occupies the pore channels of the EU-1 molecular sieve to prevent alkali from entering the interior of EU-1 molecular sieve crystals, so the EU-1 molecular sieve is not destroyed in the process of crystallization and the integrity of crystal structure is maintained, which are beneficial for improvement of the physical and chemical properties and the catalytic activity of the SAPO-34 / EU-1 composite molecular sieve.

Description

technical field [0001] The invention belongs to the field of synthesis of molecular sieve catalytic materials, in particular to a SAPO-34 / EU-1 composite molecular sieve and a synthesis method thereof. Background technique [0002] Composite molecular sieve is a composite molecular sieve with a special structure, which is a co-crystal formed by two or more molecular sieves, or a composite crystal with the structural characteristics of two or more molecular sieves. Due to the particularity of the composite molecular sieve structure, this molecular sieve has a more reasonable distribution of acidity and good hydrothermal stability, overcomes the limitations of its components, better meets the needs of industrial applications, and has a wide range of applications. Application prospect. [0003] At present, there are many technologies about composite molecular sieves. For example, CN101279288A discloses a synthesis method and application of a core-shell structure composite molec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/54C01B37/08C01B39/46
Inventor 范峰凌凤香王少军张会成陈晓刚杨春雁
Owner CHINA PETROLEUM & CHEM CORP
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