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A kind of hzsm-5 molecular sieve with special morphology and its preparation method and application

A technology of ZSM-5 and molecular sieve, which is applied to molecular sieve catalysts, chemical instruments and methods, and the production of hydrocarbons from oxygen-containing organic compounds, etc., can solve the problems of short life, poor catalyst stability, etc., and achieve increased propylene yield and total olefins The effect of yield and good application prospect

Active Publication Date: 2017-05-17
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalysts reported in these researches and patents are generally spherical or cubic in shape, and the catalysts are less stable and have a shorter lifespan.

Method used

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  • A kind of hzsm-5 molecular sieve with special morphology and its preparation method and application
  • A kind of hzsm-5 molecular sieve with special morphology and its preparation method and application
  • A kind of hzsm-5 molecular sieve with special morphology and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Weigh 28.7g of aluminum sulfate and add it to 250g of deionized water, weigh 21.5g of potassium hydroxide and add it to 168g of deionized water, stir and dissolve completely, add the aqueous solution of aluminum sulfate to the potassium hydroxide aqueous solution, and mix well, record as A solution, where Al 2 o 3 with K 2 The molar ratio of O is 0.26:1; weigh 100g of 1,6-hexanediamine and add it to 276g deionized water, stir to dissolve it completely, and record it as solution B; weigh 724.5g of 25wt% silica sol and add it to 237.5g deionized water In water, stir evenly, and record it as solution C; add solution B to solution A and stir evenly, then add the mixed solution dropwise to solution C, stir vigorously while adding, and stir vigorously for 30-120 minutes after complete mixing. Then add sulfuric acid 15g and adjust the mixed solution pH value to be 11.5, wherein template agent: SiO 2 :Al 2 o 3 :H 2 O (molar ratio) = 20:70:1:1200; then move the mixed mothe...

Embodiment 2

[0064] Weigh 28.7g of aluminum sulfate and add it to 250g of deionized water, weigh 21.5g of potassium hydroxide and add it to 168g of deionized water, stir and dissolve completely, add the aqueous solution of aluminum sulfate to the aqueous solution of potassium hydroxide, and mix well, record it as A solution, where Al 2 o 3 with K 2 The molar ratio of O is 0.26:1; weigh 75g of 1,6-hexamethylenediamine and add it to 276g deionized water, stir to dissolve it completely, and record it as solution B; weigh 621g of 25wt% silica sol and add it to 237.5g deionized water , stir evenly, and record it as solution C; add solution B to solution A and stir evenly, then add the mixed solution dropwise to solution C, stir vigorously while adding, and stir vigorously for 30-120min after complete mixing, then Add sulfuric acid 13g to adjust the mixed solution pH value to be 11.5, wherein template agent: SiO 2 :Al 2 o 3 :H 2 O (molar ratio) = 15:60:1:1200; then move the mixed mother li...

Embodiment 3

[0069] Weigh 28.7g of aluminum sulfate and add it to 250g of deionized water, weigh 8.1g of potassium hydroxide and 6.2g of sodium hydroxide and add it to 168g of deionized water, stir and dissolve completely, add the aqueous solution of aluminum sulfate to the aqueous solution of potassium hydroxide and sodium hydroxide , and mixed evenly, recorded as A solution, where Al 2 o 3 :K 2 O:Na 2 The molar ratio of O is 0.44:0.63:1; weigh 125g of 1,6-hexanediamine and add it to 276g deionized water, stir to dissolve it completely, and record it as solution B; weigh 724.5g of 25wt% silica sol and add it to 237.5g In deionized water, stir evenly, and record it as solution C; add solution B to solution A and stir evenly, then add the mixed solution dropwise to solution C, stir vigorously while adding, and stir vigorously after complete mixing for 30~ 120min, then add sulfuric acid 20g to adjust the mixed solution pH value to be 11.5, wherein template agent: SiO 2 :Al 2 o 3 :H 2 ...

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Abstract

The invention provides an HZSM-5 molecular sieve with the special appearance and a preparation method and application thereof. The method comprises the steps that a water solution of an aluminum source and a water solution of an alkali source are mixed to obtain a mixed solution 1; a water solution of a template agent and the mixed solution 1 are mixed to obtain a mixed solution 2; the mixed solution 2 is added into a water solution of a silicon source during stirring, and the pH value of the system is adjusted to be 10-13 to obtain a mixed mother solution; first-stage crystallization and second-stage crystallization are performed on the mixed mother solution in sequence to obtain a ZSM-5 molecular sieve; the ZSM-5 molecular sieve is dried and roasted to conduct ion exchange to obtain the HZSM-5 molecular sieve. The HZSM-5 molecular sieve with the special appearance is used for a methanol-to-olefin reaction, the total olefin yield and propylene yield can be remarkably improved, and the HZSM-5 molecular sieve has the good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation and application of zeolite molecular sieve materials, and in particular relates to a special-morphology HZSM-5 molecular sieve and its preparation method and application. Background technique [0002] ZSM-5 zeolite is a high-silica microporous zeolite with unique three-dimensional ten-membered ring intersecting channels. It has become a very important zeolite with its unique pore structure, good catalytic performance, excellent thermal stability and hydrothermal stability Catalytic materials are widely used in catalytic cracking, isomerization, alkylation, aromatization, disproportionation, etherification, adsorption separation and many other fields. [0003] In the synthetic method disclosed in CN200610117265.5, ZSM-5 molecular sieves are prepared through hydrothermal crystallization of a directing agent solution, a liquid silicon source and a liquid aluminum source, and the directing agent solution us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/40B01J29/40C07C1/20C07C11/04C07C11/06
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 任杰张怀科吕恩静李静刘粟侥杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD