Method for preparing zeolite membrane through thermal inversion of xerogel

A technology of zeolite membrane and xerogel, which is applied in the field of chemical engineering, can solve problems such as reduction, achieve the effects of reducing pollution, improving uneven film thickness, and saving production costs

Inactive Publication Date: 2005-03-30
DALIAN UNIV OF TECH
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the treatment liquid separated after hydrothermal treatment can be reused after filtration, which not only reduces the cost but also is beneficial to environmental protection; and because the thickness and uniformity can be artificially controlled in the preparation of the gel layer, the final zeolite membrane can be uniform and dense , so as to effectively improve the unavoidable uneven thickness of the film layer and the generation of more zeolite membrane defects in the complete in-situ hydrothermal synthesis; it is also convenient to prepare large-area carrier-supported zeolite membranes, which is conducive to the further industrial application of zeolite membranes

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] Preparation of sol and hydrothermal treatment solution:

[0015] In a 250ml beaker, 1.48g of aluminum sulfate was fully dissolved in 30ml of water to obtain solution (a), and another 11.4ml of silica sol (SiO 2 wt% = 25.5%) was diluted with 30ml of water, slowly added to (a) solution under strong stirring, and continued stirring for 30 minutes to form (b) solution, and then 1.12g of sodium hydroxide was dissolved in 30ml of water Make a solution, slowly drop into (b) under continuous stirring, and continue stirring for 3 hours to make a white milky sol (c); in another 250ml beaker, dissolve 1.12g of sodium hydroxide in 60ml of water, and add 4.25g of pyrrolidine and mix well to make hydrothermal treatment solution (d).

[0016] Vector preprocessing:

[0017] Polish the surface of the support carrier with 600# sandpaper, then use ultrasonic vibration to wash away the suspended particles on the surface and pores, then soak in acid or alkali for 24 hours, ultrasonically...

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 kind of zeolite film prepn, method. The characteristics are: to compound sol according to mole matching ratio of Na2O:SiO2:Al2O3:H2O, to coat sol layer on supporting body of a-Al2O3 ceramics etc., it is conversed to dry sol layer, then is put into stainless steel pressure pot with polytetrafluorine lining to be soaked by water heat treatment solution compounded at same time, the pot is closed in temp, 80-200 deg.C, keeping the temp, for 24-48 hours, then taking out, washing, drying and inreasing and reducing temp, in program to obtain zeolite film.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and relates to a preparation method of an inorganic membrane, in particular to a preparation method of a xerogel hydrothermal conversion zeolite membrane. technical background [0002] The zeolite membrane uses porous material as a carrier to synthesize zeolite to form a uniform zeolite film on its surface. It has the incomparable advantages of organic membranes such as good chemical and thermal stability, as well as the characteristics of small and uniform pore size and adjustable cations, which have attracted widespread attention and developed rapidly in recent years. The use of such membrane materials for gas separation or catalytic reactions has shown excellent performance. However, because the preparation of zeolite membrane still has high requirements for raw materials, the preparation cost is high, and the existing preparation method is difficult to avoid the uneven thickness ...

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): C01B39/02
Inventor 王金渠祝刚鲁金明鲍仲瑛
Owner DALIAN UNIV OF 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