Hydrogenation catalyst and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9433932-B2
Application number	US-201414517350-A
Country	US
Kind code	B2
Filing date	Oct 17, 2014
Priority date	Aug 29, 2014
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

A hydrogenation catalyst is provided. The hydrogenation catalyst has a nanonickel carrier, and noble metal nanoparticles selected from Pd, Pt, Ru, Rh, or a mixture thereof, which are mounted onto the nanonickel carrier. Moreover, a method of manufacturing a hydrogenation catalyst is provided, and has steps of (1) preparing an aqueous solution containing nickel ions; (2) adding a first reducing agent in the aqueous solution containing nickel ions to form a reactant solution; (3) applying a magnetic field to the reactant solution for a first duration to obtain a nanonickel carrier; (4) preparing a noble metal solution; and (5) placing the nanonickel carrier in the noble metal solution for a second duration so that noble metal nanoparticles are mounted onto the nanonickel carrier.

First claim

What is claimed is:

1. A hydrogenation catalyst, comprising:
a nanonickel carrier; and
noble metal nanoparticles selected from palladium, platinum, ruthenium, rhodium, or a mixture thereof,
wherein the noble metal nanoparticles are mounted onto the nanonickel carrier.

2. The hydrogenation catalyst according to claim 1 , wherein the nanonickel carrier is constituted by one-dimensional nickel nanowires.

3. The hydrogenation catalyst according to claim 1 , wherein a specific surface area of the nanonickel carrier is greater than or equal to 0.2 m 2 /g.

4. The hydrogenation catalyst according to claim 1 , wherein a weight percentage of the noble metal nanoparticles in the hydrogenation catalyst is 2.5-7%.

5. The hydrogenation catalyst according to claim 1 , wherein an atomic percentage of the noble metal nanoparticles in regard to the hydrogenation catalyst is 1.5-2.5%.

6. The hydrogenation catalyst according to claim 1 , wherein a specific surface area of the hydrogenation catalyst is greater than or equal to 3.0 m 2 /g.

7. A method of manufacturing a hydrogenation catalyst, comprising steps of:
(1) preparing an aqueous solution containing nickel ions;
(2) adding a first reducing agent in the aqueous solution containing nickel ions to form a reactant solution;
(3) applying a magnetic field to the reactant solution for a first duration to obtain a nanonickel carrier;
(4) preparing a noble metal solution containing noble metal ions selected from palladium ions, platinum ions, ruthenium ions, rhodium ions, or a mixture thereof; and
(5) placing the nanonickel carrier in the noble metal solution for a second duration so that noble metal nanoparticles are mounted onto the nanonickel carrier.

8. The method according to claim 7 , wherein the aqueous solution containing nickel ions in the step (1) is prepared from nickel chloride and deionized water.

9. The method according to claim 7 , wherein the aqueous solution containing nickel ions further comprises an assistant agent selected from carboxymethyl cellulose, sodium citrate, sodium hydroxide, or a mixture thereof.

10. The method according to claim 9 , wherein carboxymethyl cellulose is 4-6% by weight in the aqueous solution containing nickel ions.

11. The method according to claim 9 , wherein the step (1) further comprises a step (1a) of: heating and stirring until the assistant agent is totally dissolved in the aqueous solution containing nickel ions.

12. The method according to claim 7 , wherein the first reducing agent is hydrazine.

13. The method according to claim 7 , wherein the magnetic field is 500-5000 G.

14. The method according to claim 7 , wherein the first duration is 1-3 hours.

15. The method according to claim 7 , wherein the noble metal solution containing noble metal ions in the step (4) is prepared from a noble metal salt and hydrochloric acid.

16. The method according to claim 15 , wherein the concentration of the hydrochloric acid is 10 N.

17. The method according to claim 7 , wherein the noble metal solution containing noble metal ions further comprises an additive selected from sodium citrate, sodium hydroxide, or a mixture thereof.

18. The method according to claim 17 , wherein the step (4) further comprises a step (4a) of: heating and stirring until the additive is totally dissolved in the aqueous solution containing noble metal ions.

19. The method according to claim 7 , wherein the step (5) further comprises a step of adding a second reducing agent to facilitate the formation of the noble metal nanoparticles.

20. The method according to claim 19 , wherein the second reducing agent is hydrazine.

21. The method according to claim 7 , wherein the second duration is 1-3 hours.

Assignees

• Univ Nat Cheng Kung

Inventors

• Chen Chuh-Yung
• Wang Cheng-Chien
• Hung Chi-Yuan
• Huang Lin-Hsiang

Classifications

• C07C2601/14

  The ring being saturated · CPC title

• B01J23/892 Primary

  Nickel and noble metals · CPC title

• B01J23/44

  Palladium · CPC title

• B01J37/342

  of electric, magnetic or electromagnetic fields, e.g. for magnetic separation · CPC title

• B01J23/464

  Rhodium · CPC title