Zeolite membrane structures and methods of making zeolite membrane structures

A technology of zeolite and zeolite crystal, applied in the field of zeolite membrane structure, can solve the problems of difficult zeolite membrane, large zeolite crystal, too thick zeolite membrane, etc.

Inactive Publication Date: 2010-07-28
CORNING INC
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] Disadvantages of conventional membrane synthesis methods include, for example: long synthesis time, excessively large zeolite crystals, zeolite crystal growth does not favor the inner surfaces of channels or tubes, limited nucleation sites on the substrate, and therefore the volume of zeolite crystals Low density, difficulty in forming a zeolite film with as few pinholes as possible, and too thick a zeolite film

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
  • Zeolite membrane structures and methods of making zeolite membrane structures
  • Zeolite membrane structures and methods of making zeolite membrane structures
  • Zeolite membrane structures and methods of making zeolite membrane structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1 - Preparation of Silica Rock-1 and ZSM-5 Seed Layer Particles

[0082] Silicaite and ZSM-5 are MFI type zeolites. In this example, silicalite-1 and ZSM-5 seed particles were grown using the reflow method.

[0083] In the synthesis of silicalite-1 seed crystals, tetraethylorthosilicate (TEOS, 98%, Alfa Aesar), tetrapropylammonium (TPAOH, 40%, Alfa Aesar), pure H 2 O and NaOH to prepare the synthesis solution. TEOS / TPAOH / H 2 The molar ratio of O / NaOH is 1 / 0.15 / 18.8 / 0.008. Synthesis solutions were prepared at room temperature. In this preparation process, first make H 2 O and NaOH were mixed, then TPAOH was added with stirring at room temperature. Then TEOS was added dropwise while stirring. The synthesis solution was continuously stirred for 24 hours, and the color of the final synthesis solution was clear.

[0084] Reflux seeded synthesis was performed at 85°C for 72 hours. The final synthesis solution was filtered through No. 40 filter paper to remove...

Embodiment 2

[0089] Example 2 Coating Zeolite Seed Crystals on α-Alumina Inorganic Porous Carrier

[0090] In this example, 2 pure α-Al with two different pore sizes on the top intermediate layer 2 o 3 Flow coating and Figure 4 Similar silicalite-1 seeds are shown; one has a median pore diameter of about 200 nm and the other has a median pore diameter of about 800 nm. The honeycomb monolithic inorganic porous carrier has an outer diameter of about 9.7mm, and there are 19 circular internal channels of 0.8mm in it, which are uniformly dispersed on the entire cross-section of the honeycomb monolithic inorganic porous carrier. The honeycomb monolithic inorganic porous support was fabricated from alpha-alumina with a median pore diameter of about 10 μm and a median porosity of about 45%. The internal channel surfaces of the honeycomb monolithic inorganic porous support are modified with an intermediate layer of alpha-alumina material.

[0091] The coating mixture for the zeolite seed layer...

Embodiment 3

[0094] Example 3 Preparation of symbiotic compact siliceous rock-1 layer by microwave-assisted hydrothermal reaction method

[0095] A silicalite-1 seed-coated support sample was treated by secondary growth using a microwave-assisted hydrothermal reaction method, resulting in symbiosis of the zeolite seed layer to form a dense silicalite-1 film. A synthetic solution for secondary growth was prepared using the same materials used for seed growth as described in Example 1, but with a molar ratio of TEOS / TPAOH / H 2O=1 / 0.12 / 5.8. Microwave Assisted Secondary Growth with Milestone 1600 Microwave Reactor and 100ml pressure cooker.

[0096] A 21 / 2 inch long honeycomb monolithic inorganic porous support (with internal channel surfaces modified with an intermediate layer of α-alumina material, coated with a silicalite-1 seed layer, dried and calcined) was placed vertically on In a pressure cooker, immerse in the synthetic solution. The reaction conditions were set at 400 watts of m...

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
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

Inorganic membrane structures of high stability, high permeability, and large surface area. Zeolite membranes can be disposed onto an intermediate pore size modification layer which reduces the pore size of the inorganic porous support. The intermediate pore size modification layer minimizes the defects in the zeolite membrane and provides a more continuous and uniform zeolite membrane. The inorganic membrane structure can be in the form of a honeycomb monolith. The applications for the zeolite membranes include, for example, membrane ultra-filtration of gas or liquid fluids, biological assays and cell culture surfaces.

Description

[0001] Cross references to related applications: [0002] This application claims priority to US Provisional Application Serial No. 11 / 824,464, filed June 29, 2007. [0003] background technical field [0004] The present application relates generally to zeolite membrane structures, and more particularly, to zeolite membrane structures for molecular-level separations, and methods of making the same. technical background [0005] In the field of membrane separation, membrane materials deposited on porous supports are widely used in microfiltration and ultrafiltration in liquid media and gas phase separation. The function of the porous support is to provide mechanical strength to the membrane material. [0006] Inorganic porous supports can be deposited with inorganic coatings to form membrane structures for filtration and separation in the environmental, biological, food, semiconductor, chemical, petrochemical, gasoline and energy industries. These industries often require...

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): B01D71/02B01D67/00B01J35/06
CPCB01D53/228B01D69/12B01D71/028B01J2229/64B01D63/066B01J29/035B01D2325/02Y02C10/10Y02C10/08B01D67/0051B01D2256/22B01J37/0244B01J29/40B01D69/105B01J35/065Y02C20/40
Inventor C·R·费克特L·D·金尼W·刘宋真
Owner CORNING INC
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