Rare earth chrysotile catalysts (US Patent 3,888,793, 1975)

Jr William F. Arey and Willard H. Sawyer received US Patent No. 3,888,793 on June 10, 1975, filed January 17, 1973. It was assigned to Exxon Research and Engineering Co.

The patent's abstract:

New complex metal silicate hydrocarbon conversion catalysts, especially chrysotiles, are provided. In one embodiment synthetic chrysotiles of Mg, Co or Ni are provided wherein 0-30% of the Mg, Co or Ni has been replaced in the synthesis mix by V, Cr, Mo, W, Mn, Re, Cu, Al, Zn or Group VIII metals, and an additional 1-20% of the Mg, Co or Ni has been replaced in the synthesis mix by rare earths, La being the most preferred. Such chrysotiles have improved stability and catalytic activity for hydrocarbon conversion reactions such as cracking, reforming, hydrocracking, aromatization, polymerization, alkylation, isomerization, hydrodesulfurization, and the like.

Where it was listed

• Asbestos, September 1975, in its patents department (the year's issues)