Acid Catalyzed Aromatic Alkylation in the Presence of Nitrogen Bases

• Author / Creator

  Xia,Yuhan

• Coal pyrolysis liquids are rich in olefinic, phenolic and aromatic compounds, but traditional hydroprocessing destroys their inherent synthetic values. Acid catalyzed processes are not considered, because coal pyrolysis
  liquids also contain nitrogen bases. We aim to find appropriate catalysts that can
  conduct acid catalysis in the presence of nitrogen bases.
  Catalytic aromatic alkylation using phenol and 1-hexene without and with
  pyridine was selected as model reaction at 315°C. Different alumina and silicaalumina
  (1-40 wt% silica) catalysts were characterized. Siral30, the catalyst with
  the highest medium strength acidity, performed best when the feed contained a
  nitrogen base. Siral40, the catalyst with the highest strong Brønsted acidity,
  performed best in the absence of nitrogen bases. Hydration affected the
  catalysis and had to be controlled. Autocatalysis of phenol alkylation with
  alkenes can also proceed and was responsible for a minor contribution to the
  overall conversion. The reaction products were mainly ortho-C-alkylphenols.

• Subjects / Keywords

  • Coal liquids
  • Acid catalysts
  • Aromatic alkylation

• Graduation date

  Fall 2012

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R33P5K

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.