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EU-1/ZMS-48 intergrowth zeolite and preparation and application thereof

A symbiotic molecular sieve, EU-1 technology, applied in molecular sieve catalysts, hydrocarbon cracking hydrocarbon production, bulk chemical production, etc.

Inactive Publication Date: 2015-10-28
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The uncertainty of ZSM-48 in the HM system also poses a challenge for the controlled synthesis of this symbiotic molecular sieve

Method used

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  • EU-1/ZMS-48 intergrowth zeolite and preparation and application thereof
  • EU-1/ZMS-48 intergrowth zeolite and preparation and application thereof
  • EU-1/ZMS-48 intergrowth zeolite and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] 16.25g NaOH was fully dissolved in 150.00g deionized water, 4.00g seed crystal (HEU-1 with a silicon-aluminum ratio of 500) was added to it, and reflux treatment was carried out under stirring for 2 hours to obtain seed crystal solution A; 8.75g NaOH was dissolved in 186.00g deionized In water, add 77.20g organic template agent 1,6-dibromide hexanebisammonium (HMBr 2 ) and 2.00g NaAlO 2 , Stir in a water bath at 40°C until completely dissolved to obtain solution B; add solution B dropwise to solution A under stirring, stir at 40°C-60°C for 2-4h to obtain mixed solution C; mix 400.00g of silica sol under vigorous stirring Slowly add it dropwise into the mixed solution C to obtain a silica-alumina gel, and the molar ratio of the gel is: SiO 2 / Al 2 o 3 =300,H 2 O / SiO 2 =12, HM / SiO 2 =0.08,Na 2 O / SiO 2 =0.12, where the amount of seed crystals is the amount of silicon source added to SiO 2 2.5wt.%, aged in a water bath at 60°C for 10 hours, then loaded into a 1L re...

Embodiment 2

[0125] 1.53g NaOH was fully dissolved in 30.00g deionized water, 0.80g seed crystal (HEU-1 with a silicon-aluminum ratio of 500) was added to it, and the seed crystal solution A was obtained by refluxing under stirring for 2 hours; 0.94g NaOH was dissolved in 18.00g deionized In water, add 9.65g organic template agent 1,6-dibromide hexanebisammonium (HMBr 2 ) and 0.24g NaAlO 2 , Stir in a water bath at 40°C until completely dissolved to obtain solution B; add solution B dropwise to solution A under stirring, stir at 40°C-60°C for 2-4h to obtain mixed solution C; mix 80.00g of silica sol under vigorous stirring Slowly add it dropwise into the mixed solution C to obtain a silica-alumina gel, and the molar ratio of the gel is: SiO 2 / Al 2 o 3 =500,H 2 O / SiO 2 =10, HM / SiO 2 =0.05, Na 2 O / SiO 2=0.06, where the amount of seed crystals is the amount of silicon source added to SiO 2 2.5wt.%, aged in a water bath at 60°C for 10h, then loaded into a 200mL reactor with a polytet...

Embodiment 3-5

[0127] 4.75g NaOH was fully dissolved in 170.00g deionized water, 0.45g, 1.35g, 2.55g seed crystals (HEU-1 with a silicon-aluminum ratio of 300) were added to it, and the seed crystal solution A was obtained by refluxing under stirring for 2 hours; 3.17g NaOH Dissolve in 100.00g deionized water, add 27.15g organic template agent 1,6-dibromide hexanebisammonium (HMBr 2 ) and 0.23g NaAlO 2 , stirred in a water bath at 40°C until completely dissolved to obtain solution B; added solution B dropwise to solution A under stirring, and stirred at 40°C-60°C for 2-4h to obtain mixed solution C; Slowly add to the mixed solution C under stirring to obtain a silica-alumina gel, and the molar ratio of the gel is: SiO 2 / Al 2 o 3 =500,H 2 O / SiO 2 =30, HM / SiO 2 =0.15,Na 2 O / SiO 2 =0.20, where the amount of seed crystals is the amount of silicon source added to SiO 2 1.5wt%, 4.5wt.%, 8.5wt.%, aged in a water bath at 60°C for 10h, then loaded into a 500mL reactor with a polytetrafluoro...

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Abstract

The invention provides an EU-1 / ZMS-48 intergrowth zeolite and preparation and application thereof. The crystalline content of EU-1 in the molecular sieve is 10-96wt.%; the crystallization stable period of the intergrowth zeolite with different crystalline phase proportions at the crystallization temperature is not shorter than 18 hours, and fluctuation of the crystalline content in the stable period does not exceed 2%, wherein the crystallization temperature is 160-200 DEG C, more preferably 160-180 DEG C. According to the EU-1 / ZMS-48 intergrowth zeolite provided by the invention, by selecting a pure phase EU-1 molecular sieve with a high ratio of silicate to aluminium (SiO2 / Al2O3=100-infinity) as a seed crystal, controlled synthesis of the EU-1 / ZMS-48 intergrowth zeolite is realized, so that the intergrowth zeolite with different ratios of silicate to aluminium and different crystalline phase proportions is obtained; moreover, the obtained samples with different different crystalline phase proportions are long in crystallization stable period, thereby laying a foundation for further amplification and industrial application of the intergrowth zeolite.

Description

technical field [0001] The invention relates to the field of molecular sieve preparation, in particular to an EU-1 / ZSM-48 symbiotic molecular sieve and its preparation and application. Background technique [0002] Ethylene and propylene are important petrochemical raw materials. With the development of the economy, the demand for ethylene and propylene in various countries is increasing. Among the various production processes of low-carbon olefins, the catalytic cracking process has obvious advantages in terms of energy consumption and product selectivity, and has attracted widespread attention. The core technology of this reaction process lies in the development and utilization of efficient catalytic cracking catalysts. [0003] Molecular sieve catalysts have the characteristics of regular and uniform pore distribution, good thermal and hydrothermal stability, adjustable acidity, etc., and show good reactivity and low-carbon olefin selectivity in the catalytic cracking re...

Claims

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Application Information

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IPC IPC(8): C01B39/04B01J29/80C07C11/04C07C11/06C07C11/08C07C4/06
CPCY02P20/52
Inventor 巩雁军张亚飞孙丽媛邢隆飞张洛明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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