Method for preparing hierarchical pore SAPO-20 molecular sieve from illite

A SAPO-20, illite technology, applied in molecular sieve and alkali-exchanged phosphate, molecular sieve characteristic silicoaluminophosphate and other directions, can solve the problem that the research of hierarchical porous SAPO-20 molecular sieve has not yet been reported, and achieves the goal of reducing synthesis cost. Effect

Pending Publication Date: 2021-04-30
XIAN UNIV OF SCI & TECH
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, zeolite molecular sieves can be successfully synthesized using illite as raw material, but the research on the synthesis of hierarchically porous SAPO-20 molecular sieves using illite as raw material has not been reported yet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing hierarchical pore SAPO-20 molecular sieve from illite
  • Method for preparing hierarchical pore SAPO-20 molecular sieve from illite
  • Method for preparing hierarchical pore SAPO-20 molecular sieve from illite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The illite that present embodiment provides prepares the method for hierarchical porous SAPO-20 molecular sieve comprising:

[0043] 1) Calcining and activating illite minerals and sodium carbonate powder, cooling and grinding to obtain activated illite;

[0044] The activation process is that the mass ratio of illite minerals to sodium carbonate is 1:0.6, the calcination temperature is 600°C, the calcination time is 90min, and the particle size of illite raw ore is 100 mesh. Grinding after cooling to obtain activated illite;

[0045] 2) Mix activated illite and 2mol / L hydrochloric acid at a mass volume ratio of 1:13.5mL, stir in a water bath at 80°C for 4 hours, centrifuge, wash, and dry to obtain activated illite silica slag with a purity ≥ 65%;

[0046] 3) Activated illite silica slag, aluminum source, phosphorus source, water, microporous template agent and mesoporous template agent are made into slurry, and the pH value is maintained at 9; the molar ratio of each ...

Embodiment 2

[0052] The method that utilizes illite to prepare microporous SAPO-20 molecular sieve that the present embodiment provides comprises:

[0053] 1) Calcining and activating illite minerals and sodium carbonate powder, cooling and grinding to obtain activated illite;

[0054] The activation process is that the mass ratio of illite minerals to sodium carbonate is 1:0.8, the calcination temperature is 900°C, the calcination time is 60min, and the particle size of illite raw ore is 200 mesh. Grinding after cooling to obtain activated illite;

[0055] 2) Mix activated illite and 2mol / L hydrochloric acid at a mass volume ratio of 1:13.5mL, stir in a water bath at 95°C for 3 hours, centrifuge, wash, and dry to obtain activated illite silica slag with a purity ≥ 65%;

[0056] 3) The activated illite silicon slag is made into slurry with aluminum source, phosphorus source, water, microporous template agent and mesoporous template agent, and the pH value is maintained at 6; the molar rat...

Embodiment 3

[0062] The method that utilizes illite to prepare microporous SAPO-20 molecular sieve that the present embodiment provides comprises:

[0063] 1) Calcining and activating illite minerals and sodium carbonate powder, cooling and grinding to obtain activated illite;

[0064] The activation process is that the mass ratio of illite minerals to sodium carbonate is 1:1.2, the calcination temperature is 700°C, the calcination time is 90min, and the particle size of illite raw ore is 300 mesh. Grinding after cooling to obtain activated illite;

[0065] 2) Mix activated illite and 2mol / L hydrochloric acid at a mass volume ratio of 1:13.5mL, stir in a water bath at 85°C for 3.5h, centrifuge, wash and dry to obtain activated illite silica slag with a purity ≥ 65%;

[0066] 3) Activated illite silicon slag, aluminum source, phosphorus source, water, microporous template and mesoporous template are made into slurry, and the pH value is kept at 7; the molar ratio of each substance in the s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Mohs hardnessaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of chemical material synthesis, and relates to a method for preparing a hierarchical pore SAPO-20 molecular sieve from illite. The method comprises the following steps: 1) calcining illite minerals and sodium carbonate to obtain activated illite; 2) mixing the activated illite with hydrochloric acid according to a mass-volume ratio of 1g to 13.5 mL, and stirring, centrifuging, washing and drying the mixture to obtain activated illite silicon slag; 3) mixing deionized water, a phosphorus source, an aluminum source, a microporous template agent, a mesoporous template agent, the acid-washed activated illite silicon slag and ethanol to obtain reactant gel, and crystallizing, centrifuging, washing, drying and calcining the reactant gel to obtain molecular sieve raw powder; and 4) calcining the molecular sieve raw powder in flowing air, and cooling the powder to obtain the hierarchical pore SAPO-20 molecular sieve. The hierarchical pore SAPO-20 molecular sieve is synthesized by taking the natural illite mineral as the raw material, so that the raw material source of the hierarchical pore SAPO-20 molecular sieve is broadened; the method has the advantages of short production process and low energy consumption, and the synthesis cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of porous material synthesis, and relates to a method for preparing multi-level porous SAPO-20 molecular sieves with illite as the main silicon source. Background technique [0002] SAPO-20 molecular sieve is composed of six rings, has a SOD structure, belongs to the cubic crystal system, and its space group is Im 3 m, the pore size is 0.3nm, and the pore volume is 0.40cm 3 / g, therefore, the hierarchical porous SAPO-20 molecular sieve is expected to be widely used in the fields of organic catalysis, hydrogen storage and gas separation, etc., and has broad development and application prospects. [0003] At present, the synthesis of SAPO-20 molecular sieve is mainly based on SiO 2 Powder, tetraethyl silicate, silica sol, etc. are used as silicon sources, aluminum isopropoxide, pseudoboehmite, etc. Synthesized by traditional hydrothermal synthesis method or liquid phase crystallization method. [0004] Syn...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/54C01B37/08
CPCC01B39/54C01B37/08C01P2002/72C01P2004/03
Inventor 陈治平王苗苗张旭辉芦静韦晓艺周文武李建伟汪广恒
Owner XIAN UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap