Surface modified metallic foam body, process for its production and use thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-023/00
B01J-025/02
C07C-029/136
B01J-035/10
B01J-037/02
B01J-037/08
B01J-037/18
B01J-035/04
B01J-037/00
C22C-001/08
B01J-023/755
출원번호
14173312
(2014-02-05)
등록번호
10596556
(2020-03-24)
우선권정보
EP-13154293 (2013-02-06)
발명자
/ 주소
Radivojevic, Dejan
Neumann, Dirk
Saberi, Shadi
Bae, Jungsuk
Poss, Rene
Büttner, Tilo
Walther, Gunnar
Böhm, Hans-Dietrich
Weissgärber, Thomas
Klöden, Burghardt
Boden, Arne
출원인 / 주소
Alantum Europe GmbH
대리인 / 주소
Sughrue Mion, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
A metallic foam body containing an alloy skin which is up to 50 μm thick can be obtained by a process including (a) providing a metallic foam body comprising a first metallic material; (b) applying a second metallic material which contains a first metallic compound that is leachable as such and/or t
A metallic foam body containing an alloy skin which is up to 50 μm thick can be obtained by a process including (a) providing a metallic foam body comprising a first metallic material; (b) applying a second metallic material which contains a first metallic compound that is leachable as such and/or that can be transformed by alloying into a second metallic compound that is leachable and different from the first metallic compound on a surface of the foam body (a), by coating the metallic foam body with an organic binder and a powder of the second metallic material; (c) forming a skin on foam body (b) by alloying the first and the second metallic material; and (d) leaching out with a leaching agent at least a part of the first and/or the second metallic compound.
대표청구항▼
1. A surface modified metallic foam body containing an unmodified core and an alloy skin on surface of the unmodified core, obtained by a process comprising the steps: (a) providing a metallic foam body, as a core, comprising a first metallic material, wherein the metallic foam body of (a) has an ap
1. A surface modified metallic foam body containing an unmodified core and an alloy skin on surface of the unmodified core, obtained by a process comprising the steps: (a) providing a metallic foam body, as a core, comprising a first metallic material, wherein the metallic foam body of (a) has an apparent density in the range of from 300 to 1200 kg/m3 as determined as weight per volume unit according to ISO 845;(b) applying a second metallic material which is different from the first metallic material of (a) and which contains a first metallic compound that is leachable as such and/or that can be transformed by alloying into a second metallic compound that is leachable and different from the first metallic compound on a surface of the metallic foam body of (a), by coating the surface of the metallic foam body of (a) with an organic binder and a powder of the second metallic material, wherein the second metallic material contains A1 as the first metallic compound;(c) forming the alloy skin by alloying the first metallic material and the second metallic material of step (b) to give an alloyed metallic foam body comprising the core that is unmodified and an alloy skin formed on the surface of the unmodified core; and(d) treating the alloyed metallic foam body obtained in step (c) with an agent that is capable of leaching out the leachable first and/or second metallic compound from the alloy skin of the metallic foam body, to leach out at least a part of the first and/or the second metallic compound from the alloy skin of the alloyed metallic foam body; wherein the thickness of the alloy skin is in the range of up to 50 μm as determined by electron microscopy, and wherein the unmodified core of the alloyed metallic foam body comprises pores with a pore size between 100 and 5000 μm as determined by a Visiocell analysis method from Recticel, a specific surface area in the range of from 100 to 20000 m2/m3 as determined in accordance with DIN 9277 via gas adsorption and a porosity in the range of from 0.50 to 0.95 as determined by using the following equation: Porosity (%)=100/VT×(VT−W(1000/ρ),wherein VT is the foam sheet sample W is the foam sheet sample weight; and ρ is the density of the foam material. 2. The surface modified metallic foam body according to claim 1, wherein the first metallic material contains at least one metal selected from the group consisting of Ni, Fe, Cr, Co, Cu, Ag, Au, Pt, and Pd. 3. The surface modified metallic foam body according to claim 2, wherein the metal is selected from the group consisting of Ni, Cr, Co, Cu, and Ag. 4. The surface modified metallic foam body according to claim 1, wherein the second metallic material contains Si or Zn as the second metallic compound. 5. The surface modified metallic foam body according to claim 1, wherein the metallic foam body of (a) is obtained by coating a polyurethane foam with the first metallic material and then burning off the polyurethane foam. 6. A process for producing a surface modified metallic foam body containing an unmodified core and an alloy skin on surface of the unmodified core, comprising the steps: (a) providing a metallic foam body, as a core, comprising a first metallic material, wherein the metallic foam body of (a) has an apparent density in the range of from 300 to 1200 kg/m3 as determined as weight per volume unit according to ISO 845;(b) applying a second metallic material which is different from the first metallic material of (a) and which contains a first metallic compound that is leachable as such and/or that can be transformed by alloying into a second metallic compound that is leachable and different from the first metallic compound on a surface of the metallic foam body of (a), by coating the surface of the metallic foam body of (a) with an organic binder and a powder of the second metallic material,wherein the second metallic material contains Al as the first metallic compound;(c) forming the alloy skin by alloying the first metallic material and the second metallic material of step (b) to give an alloyed metallic foam body comprising the core that is unmodified and an alloy skin formed on the surface of the unmodified core; and(d) treating the alloyed metallic foam body obtained in step (c) with an agent that is capable of leaching out the leachable first and/or second metallic compound from the alloy skin of the alloyed metallic foam body,wherein the thickness of the alloy skin is in the range of up to 50 μm as determined by electron microscopy, andwherein the unmodified core of the alloyed metallic foam body comprises pores of a pore size between 100 and 5000 μm as determined by a Visiocell analysis method from Recticel, a specific surface area in the range of from 100 to 20000 m2/m3 as determined in accordance with using the following equation: Porosity (%)=100/VT×(VT−W(1000/ρ),wherein VT is the foam sheet sample volume; W is the foam sheet sample weight; and ρ is the density of the foam material. 7. The process according to claim 6, wherein in alloying in step (c) a heating temperature and time as well as a cooling time are adjusted in order to control the leachability of the alloy skin obtained. 8. The process according to claim 6, wherein the first metallic material comprises nickel and the second metallic material comprises aluminum. 9. The process according to claim 6, wherein the step (b) further comprises applying at least one promoter element to the surface of the metallic foam body of (a). 10. A catalyst formulation comprising the surface-modified metallic foam body of claim 1. 11. A hydrogenation process which comprises subjecting a chemical compound to a chemical reaction in the presence of the catalyst formulation of claim 10. 12. The process according to claim 6, wherein the first metallic material consists of nickel and the second metallic material comprises aluminum. 13. The process according to claim 6, which further comprises a step (e) of applying at least one promoter element to the surface of the alloyed metallic foam body obtained in step (d). 14. The surface modified metallic foam body according to claim 1, wherein the second metallic material consists of A1 as the first metallic compound. 15. The surface modified metallic foam body according to claim 1, wherein the treatment (d) is carried out at a temperature between 50 and 95° C. for a period of 2 to 10 minutes. 16. The method according to claim 6, wherein the treatment (d) is carried out at a temperature between 50 and 95° C. for a period of 2 to 10 minutes. 17. The surface modified metallic foam body according to claim 1, wherein the second metallic material powder has an average particle size in a range of from 30 μm to 50 μm. 18. The method according to claim 6, wherein the second metallic material power in (b) has an average particle size in a range of from 30 μm to 50 μm.
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