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Mesoporous ZSM-22 molecular sieve, synthesis method thereof and application thereof

A synthesis method and molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, other chemical processes, etc., can solve the problems such as no reports of ZSM-22 molecular sieve, and achieve improved adsorption and catalytic performance, obvious effect, and large specific surface area. Effect

Inactive Publication Date: 2017-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although there are many reports on the synthesis of ZSM-22 molecular sieves, so far, there are no reports on ZSM-22 molecular sieves containing pores with a pore size of 2 to 150 nanometers.

Method used

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  • Mesoporous ZSM-22 molecular sieve, synthesis method thereof and application thereof
  • Mesoporous ZSM-22 molecular sieve, synthesis method thereof and application thereof
  • Mesoporous ZSM-22 molecular sieve, synthesis method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 14.050 grams of deionized water, 0.340 grams of sodium hydroxide (96.0% by weight), 0.047 grams of sodium aluminate (Al 2 O 3 43.0% by weight, Na 2 O 35.0% by weight), 2.85 g of 1-ethylpyridine bromide, 9.0 g of silica sol (SiO 2 40% by weight) is uniformly mixed, and the material ratio (molar ratio) of the reactants is:

[0037] SiO 2 / Al 2 O 3 = 200

[0038] 1-ethylpyridine bromide / SiO 2 =0.25

[0039] H 2 O / SiO 2 = 18

[0040] NaOH / SiO 2 =0.15

[0041] After mixing uniformly, put it into a stainless steel reactor and crystallize at 150°C for 3 days under stirring. After the completion of crystallization, it is filtered, washed and dried to obtain the ZSM-22 molecular sieve precursor.

[0042] 3 grams of the synthesized ZSM-22 molecular sieve precursor was contacted with 90 grams of 1.5% sodium hydroxide aqueous solution at 65° C. for 3 hours, and after the reaction was completed, it was filtered, washed, dried and calcined to obtain mesoporous ZSM-22 molecular sieve.

[0043]...

Embodiment 2

[0045] 45.0 grams of deionized water, 0.78 grams of sodium hydroxide (96.0% by weight), 0.119 grams of sodium aluminate (Al 2 O 3 43.0% by weight, Na 2 O 35.0% by weight), 4.75 g of 1-ethylpyridine bromide, 15.0 g of silica sol (SiO 2 40% by weight) is uniformly mixed, and the material ratio (molar ratio) of the reactants is:

[0046] SiO 2 / Al 2 O 3 = 200

[0047] 1-ethylpyridine bromide / SiO 2 =0.25

[0048] H 2 O / SiO 2 = 30

[0049] NaOH / SiO 2 = 0.2

[0050] After mixing uniformly, put it into a stainless steel reactor and crystallize at 150°C for 3 days under stirring. After the completion of crystallization, it is filtered, washed and dried to obtain the ZSM-22 molecular sieve precursor.

[0051] 3 grams of the synthesized ZSM-22 molecular sieve precursor was contacted with 100 grams of a 1.0% sodium hydroxide aqueous solution at 60° C. for 5 hours, and after the reaction was completed, it was filtered, washed, dried and calcined to obtain mesoporous ZSM-22 molecular sieve.

[0052...

Embodiment 3

[0054] Mix 29.5 grams of deionized water, 1.0 grams of potassium hydroxide, 0.455 grams of aluminum sulfate hexadecahydrate, 2.60 grams of 1,8-octane diamine, 11.9 grams of silica sol (SiO 2 30% by weight) is uniformly mixed, and the material ratio (molar ratio) of the reactants is:

[0055] SiO 2 / Al 2 O 3 =90

[0056] 1,8-octanediamine / SiO 2 = 0.30

[0057] H 2 O / SiO 2 = 35

[0058] KOH / SiO 2 = 0.30

[0059] After mixing uniformly, it was aged at room temperature for 24 hours and then put into a stainless steel reactor, and crystallized at 160°C for 3 days under stirring. After the completion of crystallization, it is filtered, washed and dried to obtain the ZSM-22 molecular sieve precursor.

[0060] 2 g of the synthesized ZSM-22 molecular sieve precursor was contacted with 70 g of a 2.0% sodium hydroxide aqueous solution at 40°C for 8 hours, and after the reaction was completed, it was filtered, washed, dried, and calcined to obtain mesoporous ZSM-22 molecular sieve.

[0061] The XRD...

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Abstract

The invention relates to a mesoporous ZSM-22 molecular sieve, a synthetic method thereof and application thereof. The mesoporous ZSM-22 molecular sieve has pore size distribution of 2-150 nanometers, and is high in outer specific surface area; the synthesis method is simple and easy for industrial production; the mesoporous ZSM-22 molecular sieve can be applied as an adsorbent, a catalyst carrier or a catalyst component of organic compound conversion.

Description

Technical field [0001] The invention relates to a mesoporous ZSM-22 molecular sieve, its synthesis method and its application. Background technique [0002] ZSM-22 molecular sieve is a silica-alumina molecular sieve synthesized by researchers from Mobil Corporation. The pores of the molecular sieve are one-dimensional straight pores, the opening of the pores is a 10-membered ring, and the pore size is 0.45 nm×0.55 nm. ZSM-22 molecular sieve has a wide range of applications in industrial catalysis, especially Pt / ZSM-22 molecular sieve prepared with ZSM-22 molecular sieve as a carrier has important applications in hydroisomerization reactions. [0003] The synthesis of ZSM-22 molecular sieve mainly adopts the hydrothermal crystallization method. The silicon source, aluminum source, alkali source, organic template and water are mixed uniformly, and after crystallization, the ZSM-22 molecular sieve is calcined. The crystals of ZSM-22 molecular sieve synthesized in this way are genera...

Claims

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Application Information

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IPC IPC(8): C01B39/04B01J20/18B01J32/00B01J29/70
CPCC01B39/04B01J20/18B01J29/7042C01P2002/72C01P2004/03C01P2004/04C01P2006/12C01P2006/14C01P2006/16C01P2006/17
Inventor 王振东杨为民孙洪敏张斌罗翼李娜
Owner CHINA PETROLEUM & CHEM CORP
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