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Beta and EU-1 composite molecular sieve and synthesis method thereof

A composite molecular sieve, EU-1 technology, applied in the field of molecular sieve catalytic material synthesis, can solve problems such as difficult control of composite structure, influence on adsorption and catalytic performance, and damage to the first component, so as to improve physical and chemical properties and catalytic activity and avoid crystallization The effect of reducing the degree and maintaining the integrity

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 current 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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  • Beta and EU-1 composite molecular sieve and synthesis method thereof
  • Beta and EU-1 composite molecular sieve and synthesis 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 0.25 g of sodium hydroxide in 30 mL of 25% TEAOH and stir for 30 min. Then add 0.5 g of sodium aluminate and stir for 30 min. Add 7 g of white carbon black slowly and stir for 30 min. Add 5 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 140 °C for 30 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 air atmosphere, and the obtained sample was Beta / EU-1 composite molecular s...

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 0.25 g of sodium hydroxide in 30 mL of 25% TEAOH and stir for 30 min. Then add 0.5 g of sodium aluminate and stir for 30 min. Add 6 g of white carbon black slowly and stir for 30 min. Add 6 g of EU-1 prepared in step (1) and stir for 30 min; then seal the reaction kettle and crystallize in an oven at 150 °C for 30 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 air atmosphere, and the obtained sample was Beta / EU-1 composite molecular siev...

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 0.2 g of sodium hydroxide in 25 mL of 25% TEAOH and 10 mL of distilled water, and stir for 30 min. Then add 0.5 g of aluminum nitrate and stir for 30 min. Add 7 g of white carbon black slowly and stir for 30 min. 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 150 °C for 52 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 air atmosphere, the...

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Abstract

The invention provides a Beta / EU-1 composite molecular sieve which has two crystal forms of an EU-1 molecular sieve and a Beta molecular sieve at a same time. According to a Beta / EU-1 composite molecular sieve synthesis method provided by the invention, the EU-1 molecular sieve is added into a glucose solution and is subjected to an ultrasonic treatment; filtering, drying and roasting are carried out, such that a treated EU-1 molecular sieve is obtained; distilled water, an alkali source, a templating agent, an aluminum source, a silicon source and the treated EU-1 molecular sieve are mixed; and the mixture is crystallized for 25-100h under a temperature of 100-180 DEG C, such that the Beta / EU-1 composite molecular sieve is obtained. According to the invention, glucose is introduced into the micropore channels of the EU-1 molecular sieve, and is converted into carbon through roasting, such that the channels of the EU-1 molecular sieve are occupied, and alkali is prevented from entering the crystals of the EU-1 molecular sieve. Therefore, the EU-1 molecular sieve is prevented from being damaged during the crystallization reaction process, and crystal structure integrity is maintained. Therefore, the physical and chemical properties and the catalytic activity of the Beta / EU-1 composite molecular sieve can be improved.

Description

technical field [0001] The invention belongs to the field of synthesis of molecular sieve catalytic materials, in particular to a Beta / 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, CN1583562A discloses a double microporous zeolite molecular sieve and its preparation method. The met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80
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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