Unlock instant, AI-driven research and patent intelligence for your innovation.

CHA molecular sieve slurry rapid heat treatment method

A rapid heat treatment, molecular sieve technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of inability to achieve continuous operation and low production efficiency, and achieve the effect of improving production efficiency and efficiency.

Active Publication Date: 2021-01-22
ZHEJIANG ZHENENG TECHN RES INST +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the molecular sieve preparation process, the conventional post-treatment process includes solid-liquid separation of molecular sieve slurry, water washing, low-temperature drying of molecular sieve filter cake, crushing of dry filter cake, high-temperature roasting of dry powder, etc. Each process is intermittent operation. Units are independent of each other and continuous operation cannot be achieved, resulting in low production efficiency

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
  • CHA molecular sieve slurry rapid heat treatment method
  • CHA molecular sieve slurry rapid heat treatment method
  • CHA molecular sieve slurry rapid heat treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of SSZ-13 molecular sieve: 30% silica sol (LUDOX-AS-30) as silicon source, sodium metaaluminate as aluminum source, sodium hydroxide as alkali source, choline chloride as auxiliary agent, N,N , N-trimethyladamantyl ammonium hydroxide is used as template, deionized water is used as solvent, according to the molar ratio of raw materials SiO 2 :Al 2 o 3 :Na 2 O:CC:TMAda + :OH - :H 2 O=1:0.05:0.3:0.1:0.1:0.4:20, the raw materials are mixed evenly and configured into a molecular sieve initial crystallization gel, wherein CC is choline chloride, and the molecular sieve initial crystallization gel is aged for a period of time at room temperature, Placed in a high-pressure reactor, self-pressurized and crystallized at 150° C. for 10 days to finally obtain SSZ-13 molecular sieve slurry with a solid content of 15%.

[0033] 500 liters of SSZ-13 molecular sieves (Na 2 O content is 1.0%) slurry (density 1.20g / ml) is pumped into the inorganic ceramic membrane separa...

Embodiment 2

[0037] The synthesis of SSZ-13 molecular sieve slurry is the same as in Example 1.

[0038] 500 liters of SSZ-13 molecular sieves (Na 2O content is 1.0%) slurry (density is 1.20g / ml) is pumped into the inorganic ceramic membrane separation system, wherein the average pore size of the membrane is 0.4 micron, the membrane surface velocity is controlled at 4m / s, and the filtrate passes through the inorganic ceramic membrane through the separator shell The upper end of the layer flows out, and the intercepted molecular sieve slurry is circulated back to the storage tank, and the cycle is repeated until the solid content of the molecular sieve slurry increases to 45%. Then add deionized water to the storage tank to dilute the concentrated molecular sieve slurry to a solid content of 10%. Circulate again, filter, concentrate to a solid content of 45%, and repeat the process until sampling and analysis of Na 2 O content is 0.042%, finally obtains 155 liters of water-washed, concentr...

Embodiment 3

[0042] The synthesis of SSZ-13 molecular sieve slurry is the same as in Example 1.

[0043] 500 liters of SSZ-13 molecular sieves (Na 2 O content is 1.0%) slurry (density 1.20g / ml) is pumped into the inorganic ceramic membrane separation system, wherein the average pore size of the membrane is 0.4 micron, the membrane surface velocity is controlled at 6m / s, and the filtrate passes through the inorganic ceramic membrane through the separator shell The upper end of the layer flows out, and the intercepted molecular sieve slurry is circulated back to the storage tank, and the cycle is repeated until the solid content of the molecular sieve slurry increases to 50%; then add deionized water to the storage tank to dilute the concentrated molecular sieve slurry to a solid content of 10%. Circulate again, filter, concentrate to a solid content of 50%, and repeat the process until sampling and analysis of Na 2 The O content was 0.040%, and finally 148 liters of water-washed and concen...

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

No PUM Login to View More

Abstract

The invention relates to a CHA molecular sieve slurry rapid heat treatment method. The method comprises the following steps of: 1, CHA molecular sieve slurry synthesis: uniformly mixing a silicon source, an aluminum source, an alkali source, an auxiliary agent and a template agent, and performing aging, and carrying out high temperature crystallization in an autoclave to synthesize an initial molecular sieve slurry; and 2, rapidly treating the CHA molecular sieve slurry. ,According to the method, as for the CHA molecular sieve slurry treatment process, an inorganic ceramic membrane separationsystem and a high-speed centrifugal spray drying device are introduced, continuous operation of molecular sieve slurry washing, concentration, solid-liquid separation and drying procedures is achieved. Compared with conventional operation procedures, the method greatly improves efficiency of the molecular sieve slurry treatment process, can achieve continuous operationand improve production benefits.

Description

technical field [0001] The invention belongs to the field of material preparation, and mainly relates to a method for rapid treatment of CHA molecular sieve slurry, in particular to a method for efficient separation, drying and roasting of CHA molecular sieves. Background technique [0002] Molecular sieve materials have an ordered microporous structure, stable skeleton structure and abundant ion exchange sites, and have been widely used in the gas adsorption separation process and catalytic reaction process in the field of environmental protection and energy and chemical industry. [0003] Molecular sieves with CHA-type topology, such as SSZ-13 molecular sieves, can be used as good carriers for denitrification catalysts. Catalysts prepared by loading metal ions have been successfully used in the denitrification process of diesel vehicle exhaust in Europe and North America, and have a huge market Economic Value. With the tightening of my country's environmental protection s...

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
IPC IPC(8): C01B39/02C01B39/48
CPCC01B39/026C01B39/48
Inventor 郑渭建卓佐西蒋楠祁志福胡达清胡晨晖杜凯敏刘春红赵金龙雪小峰
Owner ZHEJIANG ZHENENG TECHN RES INST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com