Adipic acid formation from cyclohexanediol using platinum and vanadium catalysts: elucidating the role of homogeneous vanadium species

Graham J. Hutchings,Keith Whiston,Samuel Pattisson,Rebecca V. Engel,Owen Rogers,Stuart H. Taylor,Robert L. Jenkins

doi:10.1039/d0cy00914h

Abstract

The applicability of platinum and vanadium catalysts for the production of adipic acid from cyclohexanediol is severely limited by the instability of the latter species in liquid phase reactions.

Highlights

The production of chemicals using the principles of green chemistry is becoming increasingly important.[1]
When a vanadium catalyst is added to the Pt/C catalyst, selectivity towards adipic acid was observed, as shown in entry 4
We prepared a range of vanadium bronzes incorporating Na, Cu or Ag to increase stability, as they have commonly been used previously as heterogeneous catalysts in aqueous reactions, albeit with V leaching not being reported.[34,35,36,37]

Summary

Introduction

The production of chemicals using the principles of green chemistry is becoming increasingly important.[1]. Obara et al suggested that despite losing approximately half the solid vanadium on each use, the remaining catalyst is responsible for the activity observed.[24] In either case, this leached homogeneous vanadium makes the system far less industrially viable due to the poor stability, and lifetime, of the vanadium oxide under reaction conditions in addition to the possible contamination of the product with toxic vanadium species.

Results

Conclusion