# US 2014/0194273 A1 · Wire catalyst for hydrogenation/dehydrogenation reaction and manufacturing method therefor

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- Number: US 2014/0194273 A1
- Document ID: US20140194273A1
- Status: Published application
- Kind: A1
- Application number: 14/202,978
- Filed: 2014-03-10
- Published: 2014-07-10
- Earliest claimed: 2010-04-28
- Assignees: Nippon Seisen Co., Ltd.; Masaru ICHIKAWA
- Applicants: Nippon Seisen Co., Ltd.
- Inventors: Masaru ICHIKAWA; Yoshinori TANIMOTO; Tsuneo AKIURA
- Web page: https://patentgrep.com/patent/US20140194273A1

## CPC

- B01J 23/8993: {with chromium, molybdenum or tungsten}
- B01J 21/04: Alumina
- B01J 21/063: {Titanium; Oxides or hydroxides thereof}
- B01J 21/066: {Zirconium or hafnium; Oxides or hydroxides thereof}
- B01J 23/42: Platinum
- B01J 23/6525: {Molybdenum}
- B01J 23/6527: {Tungsten}
- B01J 23/6567: {Rhenium}
- B01J 23/755: Nickel
- B01J 23/866: {Nickel and chromium}
- B01J 23/892: {Nickel and noble metals}
- B01J 35/19: {Catalysts containing parts with different compositions}
- B01J 35/55: Cylinders or rings
- B01J 35/58: Fabrics or filaments
- B01J 37/0215: {Coating}
- B01J 37/0225: {of metal substrates}
- B01J 37/342: {of electric, magnetic or electromagnetic fields, e.g. for magnetic separation}
- Y10T 29/49986: Subsequent to metal working
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A wire catalyst for hydrogenation reaction and/or dehydrogenation reaction comprises a metallic core and an oxide surface layer covering at least part of the surface thereof. The metallic core is electrically conductive so that the metallic core itself can generate heat by directly passing an electric current therethrough or electromagnetic induction. The oxide surface layer is made of an oxide of a metallic element constituting the metallic core. The oxide surface layer is provided with a porous structure having pores opening at the surface of the oxide surface layer. The catalytic material is supported in the pores of the oxide surface layer. When a shaped wire catalyst is manufactured, the shaping into a specific shape is made before the oxide surface layer having the porous structure is formed and the catalytic material is supported thereon.

## Claims

### Claim 1

A method for manufacturing a shaped wire catalyst for hydrogenation reaction and/or dehydrogenation reaction comprising the steps of:
preparing a metallic core in the form of a wire capable of generating heat by passing an electric current therethrough or electromagnetic induction;
shaping the metallic core into a predetermined specific shape; then
applying a surface treatment to the shaped metallic core so that, through an oxidizing reaction, the shaped metallic core is at least partially provided with an oxide surface layer having a porous structure having a large number of pores; and
providing a catalytic material supported in the pores.

### Claim 2 (depends on 1)

The method according to claim 1, wherein
the metallic core is a composite wire comprising a metallic central core portion having an electrical resistivity of not less than 5 micro ohm/cm at ordinary temperatures, and
an aluminum layer covering the surface of the metallic central core portion, and
the method further comprises a step of drawing the composite wire to decrease the diameter so that the total surface reduction rate becomes not less than 80%.

### Claim 3 (depends on 2)

The method according to claim 2, wherein
in the step of shaping the metallic core, the composite wire of which diameter is decreased is coiled.

### Claim 4 (depends on 1)

The method according to claim 1, which further comprises a step of applying, after forming the oxide surface layer having the pores, a pore enlarging treatment to increase the opening area and depth of the pores and/or a calcination treatment.

### Claim 5 (depends on 1)

The method according to claim 1, wherein
the step of providing the supported catalytic material includes
a treatment for making the catalytic material being supported in the pores of the oxide surface layer by impregnation or vapor-phase deposition, and
a treatment for calcining and/or reducing the metallic core with the supported catalytic material.

### Claim 6 (depends on 2)

The method according to claim 2, which further comprises a step of applying, after forming the oxide surface layer having the pores, a pore enlarging treatment to increase the opening area and depth of the pores and/or a calcination treatment.

### Claim 7 (depends on 3)

The method according to claim 3, which further comprises a step of applying, after forming the oxide surface layer having the pores, a pore enlarging treatment to increase the opening area and depth of the pores and/or a calcination treatment.