Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Application of hydrophilic Ge-ZSM-5 molecular sieve membrane to separation of organics/water system

A technology of ge-zsm-5 and organic matter, which is applied in the field of separation of organic matter/water system by hydrophilic molecular sieve membrane, can solve the problems of low separation efficiency, separation factor and permeation flux cannot be large enough at the same time, and achieve good separation Effect, large permeation flux, easy to operate

Inactive Publication Date: 2012-10-03
TAIYUAN UNIV OF TECH
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The specific technical problem to be solved in the present invention is the problem that the separation factor and the permeation flux cannot be large enough at the same time during the membrane separation of organic matter / water system, and the separation efficiency is not high; the purpose is to provide a hydrophilic Ge-ZSM-5 molecular sieve Application of Membrane in Separation of Organic Matter / Water System

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
  • Application of hydrophilic Ge-ZSM-5 molecular sieve membrane to separation of organics/water system
  • Application of hydrophilic Ge-ZSM-5 molecular sieve membrane to separation of organics/water system
  • Application of hydrophilic Ge-ZSM-5 molecular sieve membrane to separation of organics/water system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] Add 20% tetrapropylammonium hydroxide (TPAOH) into a 100 mL three-necked flask containing deionized water, and vigorously stir at room temperature for 10 minutes. Silica sol (Ludox AS-40) was slowly added dropwise to the aforementioned sol, tetraethoxygermanium (Ge(C 2 h 5 O) 4 ) was dissolved in isopropanol, slowly added dropwise to the aforementioned colloid in an ice-water bath, and vigorously stirred for about 20 minutes. Move the colloid into the water bath, heat up to 80°C, stay at this temperature for about 10 minutes to remove the alcohol in the colloid, then remove the water bath, and replenish the water lost in the evaporation process. Remove from the water bath, and continue vigorously stirring at room temperature for 3 hours to age to obtain a milky white synthetic solution. The molar composition of the synthetic solution is 0.195 Ge(C 2 h 5 O) 4 : 19.5 SiO 2 : 1.0 TPAOH : 438 H 2 O. Synthetic solution and α-Al 2 o 3 The carrier is placed togeth...

Embodiment approach 2

[0019] Apply the Ge-ZSM-5 molecular sieve membrane prepared in Embodiment 1 of the present invention, before performing the pervaporation experiment, first pass a single-component permeation test to check the compactness of the molecular sieve membrane, and pass 0.3 MP on the front side of the membrane. h 2 , test the pressure of the gas on the back side of the membrane, the pressure is 0.0 MP, it is considered that the membrane layer is relatively dense and has no defects.

[0020] 10-98 wt.% ethanol aqueous solution is used as the raw material solution, and the temperature of the raw material solution is kept at 353 K. The permeate side is evacuated by a vacuum pump, and the permeate through the membrane layer is collected by condensation with liquid nitrogen. Samples are taken every hour, and the GC-950 gas chromatograph is used to detect the change of the permeate composition, and the quality of the permeate is weighed. Calculate the separation factor and permeation flux,...

Embodiment approach 3

[0022] Applying the Ge-ZSM-5 molecular sieve membrane prepared in Embodiment 1 of the present invention is based on Embodiment 2, and 30-98 wt.% acetic acid aqueous solution is used as the raw material liquid, and the constant temperature of the raw material liquid is 343 K. The permeate side is evacuated by a vacuum pump, and the permeate through the membrane layer is collected by condensation with liquid nitrogen. Samples are taken every hour, and the GC-950 gas chromatograph is used to detect the change of the permeate composition, and the quality of the permeate is weighed. Calculate separation factors and permeate fluxes. The separation factor is ∞, and the permeate flux reaches 0.57 kg / m 2 h, achieving high efficiency separation. After 25 hours of pervaporation, the separation factor and permeation flux remained basically unchanged, indicating that the membrane layer had stable performance and good acid resistance. The results obtained are listed in the attached figu...

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 discloses an application of a hydrophilic Ge-ZSM-5 molecular sieve membrane to separation of an organics / water system. The alpha-Al2O3 is taken as a carrier, the hydrophilic Ge-ZSM-5 molecular sieve membrane prepared by an in-situ hydrothermal crystallization method is adopted as a separation material, and water in the organics / water system is separated through the pervaporation effect so as to obtain the organics. When the molecular sieve membrane is applied to an ethanol-water system of 343 K, 10 to 98 wt% and an acetic acid-water system of 353 K, 30 to 98 wt%, the separating factor reaches infinity, the permeation flux reaches 2.4 kg / m2.h and 0.57 kg / m2.h, both the permeation flux and the separating factor of the membrane are kept constant in the pervaporation process of 25 h, and the membrane shows excellent stability. The application is simple and easy to operate, and the hydrophilic Ge-ZSM-5 molecular sieve membrane is suitable for industrial production.

Description

technical field [0001] The invention relates to the application of a hydrophilic molecular sieve membrane in the separation of organic matter / water system, in particular to the separation factor of a hydrophilic molecular sieve membrane in the separation of organic matter / water system reaches ∞, and the permeation flux reaches the prior art About 1000 times the application. Background technique [0002] Organic matter is widely used in industry, such as acetic acid and ethanol, which are bulk chemical products and chemical raw materials. The traditional separation method of organic matter / water system is rectification method, but for the organic matter that forms near-boiling and azeotropic matter with water, using rectification method to separate high-concentration aqueous solution requires a large number of plates and high energy consumption . However, the use of hydrophilic membrane materials and separation through pervaporation can effectively reduce energy consumption...

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): C02F1/44B01D71/02B01D69/02
Inventor 王晓东黄伟邓旋
Owner TAIYUAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com