Study on Hydrohenation Catalysts for Synthesis of Benzotriazole Ultraviolet Absorbers
DOI:
CSTR:
Author:
Affiliation:

Clc Number:

TQ9

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    Benzotriazole and its derivatives are widely used as UV absorbers, due to their low toxicity and excellent stability. The catalytic performance of PdPtCu/C for the synthesis of 2- (2'-hydroxy-5'-methylphenyl) benzotriazole (UV-P) from 2-nitro- (2'-hydroxy-5'-methylphenyl) azobenzene (HAB) was studied. The conversion of HAB reached 100% and the selectivity of UV-P kept 92.2% after 5 h’ reaction at 323 K and 0.5 MPa hydrogen pressure. XRD, TEM and XPS results showed that the formation of Cu-Pd, Cu-Pt alloy phase and the proper amount of the noble metal species (Mδ ) on the surface of the catalyst were the key factors to inhibit the breakage of N-N bond and to reduce the by-reaction of excessive hydrogenation, which thereby supressed the formation of tetrahydrofins and aromatic amines by-products.

    Reference
    Related
    Cited by
Get Citation
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:April 19,2017
  • Revised:May 27,2017
  • Adopted:July 05,2017
  • Online: January 23,2018
  • Published:
Article QR Code