Binder-free FAU type molecular sieve particles and preparation method and application thereof

A binder-free, molecular sieve technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as cumbersome process flow and large environmental pollution

Active Publication Date: 2020-06-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of binder-free FAU type molecular sieve particle and its preparation method and application, thus solve the problem that the preparation method of binder-free FAU type molecular sieve particle in the prior art involves high-temperature hot oil, environmental pollution is large and the process The problem of cumbersome process

Method used

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  • Binder-free FAU type molecular sieve particles and preparation method and application thereof
  • Binder-free FAU type molecular sieve particles and preparation method and application thereof
  • Binder-free FAU type molecular sieve particles and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Preparation of oil phase, surfactant phase and water phase three-phase system:

[0107] Dissolve 12.3 parts of sodium metaaluminate and 12.0 parts of sodium hydroxide in 115.0 parts of deionized water, stir to dissolve them and filter with suction to obtain a clear liquid (aqueous phase), and then add 20 parts of CTAB to the top of the obtained clear liquid. Saturated aqueous solution (surfactant phase) and 40 parts of n-heptane (oil phase) to form a three-phase system containing an oil phase, a surfactant phase and an aqueous phase as a solution system for molding the silicone gel precursor.

[0108] Preparation of binder-free FAU molecular sieve particles:

[0109] Weigh 23.5 parts of silica sol (40wt.%, silica nanoparticle size is about 20nm) and 5 parts of ammonium chloride solution (10wt.%), stir quickly and evenly, obtain a silica gel mixture, The mixture is added dropwise to the molding solution system prepared above to obtain a silica gel precursor. After extracting ...

Embodiment 2

[0111] Preparation of oil phase, surfactant phase and water phase three-phase system:

[0112] Dissolve 16.4 parts of sodium metaaluminate and 12.0 parts of sodium hydroxide in 115.0 parts of deionized water, stir to dissolve and filter to obtain a clear liquid (aqueous phase), and then add 20 parts of CTAB to the top of the obtained clear liquid. Saturated aqueous solution (surfactant phase) and 40 parts of n-heptane (oil phase) to form a three-phase system containing an oil phase, a surfactant phase and an aqueous phase as a solution system for molding the silicone gel precursor.

[0113] Preparation of binder-free FAU molecular sieve particles:

[0114] Weigh 23.5 parts of silica sol (40wt.%, silica nanoparticle size is about 20nm) and 5 parts of ammonium chloride solution (10wt.%), stir quickly and evenly, obtain a silica gel mixture, The mixture is added dropwise to the molding solution system prepared above to obtain a silica gel precursor. After extracting and recovering the...

Embodiment 3

[0116] Preparation of oil phase, surfactant phase and water phase three-phase system:

[0117] Dissolve 12.3 parts of sodium metaaluminate and 12.0 parts of sodium hydroxide in 115.0 parts of deionized water, stir to dissolve them and filter with suction to obtain a clear liquid (aqueous phase), and then add 20 parts of CTAB to the top of the obtained clear liquid. Saturated aqueous solution (surfactant phase) and 40 parts of n-heptane (oil phase) to form a three-phase system containing an oil phase, a surfactant phase and an aqueous phase as a solution system for molding the silicone gel precursor.

[0118] Preparation of binder-free FAU molecular sieve particles:

[0119] Weigh 23.5 parts of silica sol (40wt.%, silica nanoparticle size is about 20nm) and 5 parts of ammonium chloride solution (10wt.%), stir quickly and evenly, obtain a silica gel mixture, The mixture is added dropwise to the molding solution system prepared above to obtain a silica gel precursor. After extracting ...

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Abstract

The invention provides binder-free FAU type molecular sieve particles and a preparation method and application thereof. The method comprises the following steps that 1, an alkaline solution with an aluminum source dissolved serves as a water phase, and a surfactant aqueous solution and an oil phase are sequentially added to the upper portion of the water phase; (2) a silica gel mixture obtained byuniformly mixing a gelatinizing agent and silica sol is added, and the silica gel mixture penetrates through the oil phase and the surfactant phase to reach the water phase so as to obtain a silica gel precursor; and 3) the oil phase and the surfactant phase are removed, the silica gel precursor and the water phase are aged, and crystallized to obtain the binder-free FAU type molecular sieve particles. The experiment steps are effectively simplified, the experiment process is shortened, the environmental pollution problem caused by the high temperature hot oil is avoided, and the prepared binder-free FAU molecular sieve particles have characteristics of large specific surface area, large hexene adsorption capacity, high adsorption/desorption rate and excellent anti-coking performance in comparison with the particles in the prior art.

Description

Technical field [0001] The invention belongs to the technical field of inorganic synthetic materials, and specifically relates to a binder-free FAU type molecular sieve particle and a preparation method and application thereof. Background technique [0002] Molecular sieves are widely used in adsorption separation, catalysis and cation exchange industries because of their good stability, unique shape selectivity, adjustable pore structure, larger specific surface area and mature preparation technology. FAU-type molecular sieves can be divided into X-type and Y-type molecular sieves. X-type molecular sieves refer to faujasite molecular sieves with a silicon-to-aluminum ratio [n(Si) / n(A1)] of 1 to 1.5, while Y-type molecular sieves refer to Faujasite molecular sieves with a silicon-to-aluminum ratio [n(Si) / n(A1)] of 1.5 to 3, X-type and Y-type molecular sieves have the same crystal structure. FAU molecular sieves can take advantage of the different interaction forces between adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/48C01B39/46
CPCC01B39/48C01B39/46C01P2002/72C01P2004/03C01P2006/14C01P2006/16C01P2006/12
Inventor 孙辉姜豪陈宇翔沈本贤刘纪昌王丹陈永灏安阳谭家论吴园
Owner EAST CHINA UNIV OF SCI & TECH
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