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Boron-modified ferrierite molecular sieve catalyst as well as preparation method and application thereof

A ferrierite and molecular sieve technology, which is applied to molecular sieve catalysts, including molecular sieve catalysts, molecular sieves and alkali exchange compounds, can solve problems such as difficult to meet market demand, and achieve strong anti-coking ability, high activity, and liquid-phase yield low effect

Active Publication Date: 2017-10-20
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, traditional isobutene production methods such as steam cracking and n-butane dehydrogenation are difficult to meet market demand, so n-butene skeletal isomerization technology that can convert n-butene into isobutene is receiving more and more attention

Method used

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  • Boron-modified ferrierite molecular sieve catalyst as well as preparation method and application thereof
  • Boron-modified ferrierite molecular sieve catalyst as well as preparation method and application thereof
  • Boron-modified ferrierite molecular sieve catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment provides a boron-modified ferrierite molecular sieve catalyst, which is prepared by the following steps:

[0050] Add 3.06g of sodium hydroxide, 1.24g of aluminum hydroxide, and 1.03g of boric acid to 101.1g of deionized water, and stir at room temperature until a uniform solution is formed;

[0051] 0.31g of ZSM-35 molecular sieve seeds with a grain size of 2 to 5 microns (see the scanning electron microscope picture figure 1 ), 4.54g ethylenediamine and 41.27g acidic silica sol (25wt% SiO 2 Content) sequentially add to the above uniform solution, continue to stir at room temperature for 2 hours to ensure that the solution does not splash, and finally form a white uniform sol;

[0052] Transfer the above-mentioned sol solution into a hydrothermal crystallization kettle, crystallize at 180°C for 72 hours, filter and wash, dry at 80°C for 12 hours, and then heat up to 550°C at a heating rate of 2°C / min for roasting and roasting for 4 After hours, the original so...

Embodiment 2

[0056] This embodiment provides a boron-modified ferrierite molecular sieve catalyst, which is prepared by the following steps:

[0057] 3.18g sodium hydroxide, 1.44g triethyl borate and 2.93g aluminum sol (30wt% Al 2 O 3 Content) Add 97.0g of deionized water and stir at room temperature until a uniform solution is formed;

[0058] 0.72g of ZSM-35 molecular sieve seeds with a grain size of 2 to 5 microns, 4.54g of n-butylamine and 41.27g of neutral silica sol (25wt% SiO 2 Content) sequentially add to the above uniform solution, continue to stir at room temperature for 2 hours to ensure that the solution does not splash, and finally form a white uniform sol;

[0059] Transfer the above sol solution into a hydrothermal crystallization kettle, crystallize at 190°C for 50 hours, filter and wash, dry at 80°C for 20 hours, then heat up to 500°C at a heating rate of 2°C / min for roasting, and roast for 8 hours Then, the raw powder of sodium-type molecular sieve with a silicon-aluminum oxide ...

Embodiment 3

[0063] This embodiment provides a boron-modified ferrierite molecular sieve catalyst, which is prepared by the following steps:

[0064] Add 3.21g of sodium hydroxide, 1.24g of aluminum sulfate and 1.44g of ammonium borate into 107.3g of deionized water, and stir at room temperature until a uniform solution is formed;

[0065] 0.52g of ZSM-35 seed crystals with a grain size of 2 to 5 microns, 4.13g of pyrrolidone and 41.27g of alkaline silica sol (25wt% SiO 2 Content) sequentially add to the above uniform solution, continue to stir at room temperature for 6 hours to ensure that the solution does not splash, and finally form a white uniform sol;

[0066] Transfer the above-mentioned sol solution into a hydrothermal crystallization kettle, crystallize at 200°C for 68 hours, filter and wash, and dry at 120°C for 10 hours, and then heat up to 600°C at a heating rate of 2°C / min for roasting and roasting for 8 After hours, the raw powder of sodium molecular sieve with a silicon-aluminum ox...

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Abstract

The invention provides a boron-modified ferrierite molecular sieve catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding an alkali source, an aluminum source and a boron source into water, and stirring to form a uniform solution; adding a ferrierite molecular sieve seed crystal, a silicon source and a template agent into the uniform solution, and stirring until a sol solution is formed; crystallizing the sol solution under a hydrothermal condition, and carrying out filtration, drying and roasting, so as to obtain boron-modified sodium-type ferrierite molecular sieve raw powder; carrying out ion exchange on the boron-modified sodium-type ferrierite molecular sieve raw powder and an ammonium salt water solution or diluted hydrochloric acid, filtering, and drying, so as to obtain hydrogen-type molecular sieve raw powder; and mixing the hydrogen-type molecular sieve raw powder with a binder and water, carrying out extrusion formation, drying, and roasting, so as to obtain the boron-modified ferrierite molecular sieve catalyst. The boron-modified ferrierite molecular sieve catalyst prepared by virtue of the preparation method has the advantages of high activity, long single pass life, strong anti-carbon property and low liquid phase yield.

Description

Technical field [0001] The invention relates to the preparation of a boron-modified ferrierite molecular sieve catalyst and a preparation method and application thereof. The molecular sieve catalyst can be used for preparing isobutene through the isomerization of n-butene skeleton, and belongs to the technical field of molecular sieve catalysts. Background technique [0002] As the total demand for downstream products such as methyl tert-butyl ether, tert-butanol, methyl methacrylate and polybutene continues to grow, the consumption of isobutylene is also increasing year by year. At this stage, traditional isobutene production methods such as steam cracking and n-butane dehydrogenation are difficult to meet market demand. Therefore, the n-butene skeletal isomerization technology that can convert n-butene to isobutene has attracted more and more attention. [0003] At present, the catalyst for isobutene isomerization from n-butene is mainly ferrierite-type molecular sieve catalyst. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/44B01J29/65C07C5/27C07C11/09
CPCB01J29/65C01B39/445C01P2002/72C01P2002/80C01P2004/03C07C5/2775C07C2529/65C07C11/09
Inventor 陈志伟徐泉周红军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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