Nanoparticle catalysts for conversion of cyclohexanol to cyclohexanone

Patent metadata

Field	Value
Publication number	US-9822052-B2
Application number	US-201615279837-A
Country	US
Kind code	B2
Filing date	Sep 29, 2016
Priority date	Oct 1, 2015
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

Methods for converting an alcohol, such as cyclohexanol to a ketone, such as cyclohexanone, include reacting the alcohol in the presence of a catalyst and oxygen to produce the ketone. In one exemplary embodiment, the catalyst comprises a microporous copper chloropyrophosphate framework including a plurality of noble metal nanoparticles. In one exemplary embodiment, the noble metal nanoparticles include at least one metal selected from the group consisting of platinum, palladium, and gold.

First claim

What is claimed is:

1. A method of converting an alcohol to a ketone, comprising:
reacting the alcohol in the presence of a catalyst and oxygen to produce the ketone, wherein the catalyst comprises a microporous copper chloropyrophosphate framework including a plurality of noble metal nanoparticles.

2. The method of claim 1 , wherein the alcohol is a cyclic alcohol.

3. The method of claim 2 , wherein the alcohol is cyclohexanol and the ketone is cyclohexanone.

4. The method of claim 3 , further comprising providing a mixture of cyclohexanone and cyclohexanol, wherein the provided cyclohexanol is reacted in said reacting step.

5. The method of claim 4 , wherein the mixture comprises 5 wt. % to 95 wt. % cyclohexanol, based on the total weight of the cyclohexanol and cyclohexanone.

6. The method of claim 4 , wherein the mixture comprises 40 wt. % to 60 wt. % cyclohexanol, based on the total weight of the cyclohexanol and cyclohexanone.

7. The method of claim 1 , wherein the noble metal nanoparticles include at least one metal selected from the group consisting of platinum, palladium, and gold.

8. The method of claim 1 , wherein the noble metal nanoparticles include at least two metals selected from the group consisting of platinum, palladium, and gold.

9. A catalyst comprising a bimetallic microporous copper chloropyrophosphate framework including a plurality of platinum and gold noble metal nanoparticles, the microporous copper chloropyrophosphate framework having a general formula of Rb 9 Cu 6 (P 2 O 7 ) 4 Cl 4 (AuCl 4 )Rb 9 Cu 6 (P 2 O 7 ) 4 Cl 3 (PtCl 4 ).

10. The catalyst of claim 9 , wherein the catalyst has been activated at a temperature of about 300° C.

11. A method of making a catalyst, the method comprising:
mixing copper (II) fluoride, orthophosphoric acid, rubidium hydroxide, rubidium chloride, and at least one source of metal chloride;
heating the mixture in a sealed container to form a catalyst precursor including precursor complexes; and
activating the catalyst by heating the catalyst precursor at a temperature of at least 175° C. to converting the precursor complexes to noble metal nanoparticle sites.

12. The method of claim 11 , wherein the source of metal chloride is selected from the group consisting of K 2 PtCl 4 , K 2 PdCl 4 , HAuCl 4 , and KAuCl 4 .

Assignees

• Advansix Resins & Chemicals Llc
• Univ Southampton

Inventors

• Levy Alan B
• Keenan Scott R
• Raja Robert
• Gill Arran M
• Potter Matthew E
• Van Aswegen Sivan A

Classifications

• B01J23/52

  Gold · CPC title

• B01J37/343

  of ultrasonic wave energy · CPC title

• B01J23/8926

  Copper and noble metals · CPC title

• B01J37/08

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J23/44

  Palladium · CPC title