Process for making supported thin zeolite membrane
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-061/00
출원번호
US-0667654
(2003-09-23)
등록번호
US-7476635
(2009-01-13)
우선권정보
FR-02 06818(2002-06-03)
발명자
/ 주소
Chau,Christophe
Sicard,Michaeel
Le Dred,Ronan
출원인 / 주소
Institut Francais Du Petrole
대리인 / 주소
Millen, White, Zelano, & Branigan, P.C.
인용정보
피인용 횟수 :
7인용 특허 :
12
초록▼
Described is a process for the preparation of a supported zeolite membrane that consists of a zeolite/substrate composite layer, whose zeolite phase exhibits a crystallinity of at least 85%, comprising: a) the formation of a gel or a solution that comprises at least one source of silica and water
Described is a process for the preparation of a supported zeolite membrane that consists of a zeolite/substrate composite layer, whose zeolite phase exhibits a crystallinity of at least 85%, comprising: a) the formation of a gel or a solution that comprises at least one source of silica and water, supplemented with at least one polar organic compound, b) bringing into contact said gel or said solution with a porous substrate, c) the crystallization of the zeolite starting from said gel or said solution; and d) the elimination of residual agents. The molar ratio of the water to the silica in the gel or the solution in stage a) is between 27:1 and 35:1. The crystallization time of stage c) is at least 25 hours. Said process is particularly suited for the preparation of zeolite membranes whose zeolite phase is of the MFI-structural type.
대표청구항▼
The invention claimed is: 1. A process for the preparation of a supported zeolite membrane comprising a zeolite/substrate composite layer, whose zeolite phase exhibits a crystallinity of at least 85%, wherein said process comprises: a) forming of a gel or a solution that comprises at least one sour
The invention claimed is: 1. A process for the preparation of a supported zeolite membrane comprising a zeolite/substrate composite layer, whose zeolite phase exhibits a crystallinity of at least 85%, wherein said process comprises: a) forming of a gel or a solution that comprises at least one source of silica and water, supplemented with at least one polar organic compound; b) bringing into contact said gel or said solution with a porous substrate; c) crystallizing zeolite starting from said gel or said solution; and d) elimination of residual agents, characterized in that, in (a), the molar ratio of water to silica in said gel or said solution is 27:1 to 35:1 and wherein in (c), the crystallization is conducted in a single hydrothermal treatment for at least 25 hours at a temperature of 100-250° C. 2. A process according to claim 1, wherein in (a), the molar ratio of the water to the silica in said gel or said solution is between 27:1 and 32:1. 3. A process according to claim 1, wherein in (a), the molar ratio of the water to the silica in said gel or said solution is between 28:1 and 31:1. 4. A process according to claim 1, wherein in (c), the crystallization time is at least 65 hours. 5. A process according to claim 1, wherein the zeolite phase exhibits a crystallinity of at least 90%. 6. A process according to claim 1, wherein in (a), the molar ratio of the polar organic compound to the silica is between 0.3:1 and 0.6:1. 7. A process according to claim 1, wherein the porous substrate comprises: ceramic based on alumina and/or zirconia and/or titanium oxide, carbon, silica, zeolites, clays, glass or metal. 8. A process according to claim 1 , wherein the zeolite phase is a zeolite MFI-structure. 9. A process according to claim 1, wherein said at least one polar organic compound is selected from the group consisting of organic hydroxides, organic structuring agents containing ammonium or phosphonium ions and corresponding anions, amines, alcohols, crown ethers and cryptands. 10. A process according to claim 1, wherein the water to the silica in said gel or said solution is between 28:1 and 31:1; crystallization is conducted for at least 65 hours; the zeolite phase exhibits a crystallinity of at least 90%; the molar ratio of the polar organic compound to the silica is between 0.3:1 and 0.6:1; and the zeolite phase is a zeolite having MFI-structure. 11. A process according to claim 1, wherein crystallization is conducted at a temperature of 150-210° C. 12. A process according to claim 4, wherein crystallization is conducted at a temperature of 150-210° C. 13. A process according to claim 1, wherein the zeolite membrane has a thickness of less than 0.5 μm.
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이 특허에 인용된 특허 (12)
Jia Meng-Dong (P.O. Box 914 Beijing CO CNX 100083) Noble Richard D. (1262 Bear Mountain Ct. Boulder CO 80303) Falconer John L. (3885 17th St. Boulder CO 80304), Ceramic-zeolite composite membranes and use for separation of vapor/gas mixtures.
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Verduijn Johannes Petrus,BEX ; Bons Antonie Jan,BEX ; Anthonis Marc Henri Carolina,BEX ; Czarnetzki Lothar Ruediger,BEX ; Mortier Wilfried Jozef,BEX, Molecular sieves and processes for their manufacture.
Anstett Martine,FRX ; Le Dred Ronan,FRX ; Guth Jean-Louis,FRX ; Methivier Alain,FRX ; Streicher Christian,FRX, Process for the production of supported zeolite membranes, and zeolite membranes so produced.
Anstett Martine,FRX ; Le Dred Ronan,FRX ; Guth Jean-Louis,FRX ; Methivier Alain,FRX ; Streicher Christian,FRX, Process for the production of zeolite membranes supported on porous glass and a zeolite membrane so produced.
Lai Wenyih Frank ; Deckman Harry William ; McHenry James Alexander ; Verduijn Johannes Petrus,BEX, Supported zeolite membranes with controlled crystal width and preferred orientation grown on a growth enhancing layer.
Deckman Harry William ; Corcoran ; Jr. Edward William ; Mc Henry James Alexander ; Lai Wenyih Frank ; Czarnetzki Lothar Ruediger,NLX ; Wales William Edward, Zeolite containing composition with a selectivity enhancing coating.
Corma Canos, Avelino; Rey Garcia, Fernando; Valencia Valencia, Susana; Cantin Sanz, Angel; Jordá Moret, Jose Luis, Material ITQ-55, method for preparation and use.
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