Desiccant based on clay-bound zeolite, process for its preparation and its use
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-029/06
B01J-029/00
출원번호
UP-0487508
(2002-08-20)
등록번호
US-7563739
(2009-07-29)
우선권정보
DE-101 41 020(2001-08-22)
국제출원번호
PCT/EP02/009277
(2002-08-20)
§371/§102 date
20041220
(20041220)
국제공개번호
WO03/018175
(2003-03-06)
발명자
/ 주소
Kilthau, Fritz
Niessen, Thomas E. W.
Wetzel, Heide
출원인 / 주소
Grace GmbH & Co. KG.
대리인 / 주소
Bunch, William D.
인용정보
피인용 횟수 :
5인용 특허 :
6
초록▼
The invention relates to a desiccant based on clay-bound zeolite which is characterized in that it comprises hygroscopic salt and optionally further conventional additives. Preferably, it is present in the form of granules, the hygroscopic salt being arranged in the pores of the granular particles.
The invention relates to a desiccant based on clay-bound zeolite which is characterized in that it comprises hygroscopic salt and optionally further conventional additives. Preferably, it is present in the form of granules, the hygroscopic salt being arranged in the pores of the granular particles. Furthermore the invention relates to a process for the preparation of the desiccant as well as its use, in particular in insulating glass windows and spacers for insulating glass windows.
대표청구항▼
The invention claimed is: 1. Desiccant clay-bound zeolite, which comprises zeolite, clay and hygroscopic salt, and optionally further additives, wherein the desiccant is in the form of granules and the hygroscopic salt is present in the pores of the granules but does not fill the micropores of the
The invention claimed is: 1. Desiccant clay-bound zeolite, which comprises zeolite, clay and hygroscopic salt, and optionally further additives, wherein the desiccant is in the form of granules and the hygroscopic salt is present in the pores of the granules but does not fill the micropores of the zeolite. 2. Desiccant according to claim 1, wherein the zeolite comprises sodium-containing zeolite of the structure type A, potassium-containing zeolite of the structure type A, zeolite of the faujasite structure type or a mixture thereof. 3. Desiccant according to claim 1, wherein the zeolite comprises potassium-containing zeolite of the structure type A. 4. Desiccant according to claim 2, wherein the potassium-containing zeolite of the structure type A has a potassium content of 9 to 18 wt. % (relative to the weight of the zeolite). 5. Desiccant according to one of claims 1, wherein the clay comprises montmorillonite, kaolinite, bentonite, smectite, attapulgite, sepiolite or a mixture thereof. 6. Desiccant according to one of claims 1, wherein the hygroscopic salt comprises magnesium chloride, calcium chloride, magnesium sulphate, sodium sulphite, magnesium polyphosphate, sodium polyphosphate, sodium carbonate, sodium sulphate or a mixture thereof. 7. Desiccant according to claim 6, wherein the hygroscopic salt is selected from magnesium chloride, magnesium sulphate and magnesium polyphosphate. 8. Desiccant according to claim 7, wherein the hygroscopic salt is magnesium sulphate. 9. Desiccant according to one of claims 1, which comprises 50 to 90 wt.-% zeolite, 5 to 40 wt.-% clay, 2 to 30 wt.-% hygroscopic salt and optionally 0 to 5 wt. % further additives. 10. Desiccant according to one of claim 1, which has a water-absorption capacity (measured at 10% relative humidity and 25° C.) of 18 wt .-% or greater, relative to the weight of the desiccant, a bulk density of 800 g/l or greater, and a water-absorption capacity per volume of 160 g H2O/1 desiccant or greater. 11. Process for the preparation of a desiccant according to one of claims 1, wherein a starting mixture comprising the components (a) zeolite, (b) clay, (c) hygroscopic salt and (d) optionally further additives is mixed, aggregated and the product obtained by aggregation is activated, optionally after drying and/or sieving. 12. Process according to claim 11, wherein a starting mixture is aggregated by granulation using granulation liquid (wet granulation). 13. Process according to claim 12, wherein a solvent or solvent mixture is used as granulation liquid. 14. Process according to claim 13, wherein a solvent or suspension of part or all of the hygroscopic salt (component (c)) of the starting mixture in the solvent or solvent mixture is used as granulation liquid. 15. Process according to claim 14, wherein the starting mixture comprising the components zeolite, clay and optionally further additives is wet-granulated using a solution or suspension of hygroscopic salt in a solvent or solvent mixture and then the granules obtained are activated, optionally after the drying and/or sieving. 16. Process according to claim 15, wherein an aqueous solution of one or more hygroscopic salt(s) is used as granulation liquid. 17. Process according to claim 16, characterized in that the aqueous solution of one or more hygroscopic salt(s) has a concentration of 10 to 50 wt.-% (relative to the weight of the solution) and/or comprises a saturated aqueous solution of a one or more hygroscopic salt(s). 18. Process according to claim 17, wherein a saturated aqueous magnesium sulphate solution is used as granulation liquid. 19. Insulating glass window or composite window, which comprises desiccant according to one of claims 1. 20. Spacer for insulating glass windows or composite windows, which comprises desiccant according to one of claims 1. 21. Desiccant according to claim 1, which has a water-absorption capacity (measured at 10% relative humidity and 25° C. of 18 wt.-% to 22 wt.-%, (relative to the weight of the desiccant), a bulk density of 800 to 1000 g/l, and a water-absorption capacity per volume of 160 to 180 g H2O desiccant. 22. Desiccant clay-bound zeolite, which comprises zeolite, clay and hygroscopic salt, and optionally further additives, wherein said desiccant possesses a water absorption capacity (measured at 10% relative humidity and 25° C.) of 18 wt % or greater based on the weight of the desiccant. 23. A mixture comprising zeolite, clay and hygroscopic salt, and optionally further additives, wherein said hygroscopic salt is in solution or suspension.
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이 특허에 인용된 특허 (6)
Cohen Alan P. (New Fairfield CT) Dangieri Thomas J. (Carmel NY) Connolly Philip (Danbury CT), Adsorbent for use in double glazed windows.
Levinson Lionel M. (Schenectady NY) Schultz William N. (Niskayuna NY) Lewis Larry N. (Scotia NY) Sumpter Chris A. (Scotia NY) Stein Judith (Schenectady NY) Zumbrum Michael A. (Clifton Park NY), Method for making a spacer element for a multi-pane sealed window.
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