Twitchell Or Pfeilring Reagent (i.e., Product Of Sulfonation Of Fatty Material In The Presence Of An Aromatic Hydrocarbon Or Phenol) Patents (Class 554/89)
  • Use of ultra-low sodium silica-aluminas in the alkylation of aromatics
    Patent number: 5302732
    Abstract: Silica-aluminas having a sodium content less than about 0.1 weight percent show increased stability when used as a catalyst for the alkylation of aromatic compounds. Where such silica-aluminas are used as the catalyst in detergent alkylation their increased stability permits continuous alkylation to be performed at lower temperatures, as a result of which the detergent alkylate product shows an incrementally higher linearity. Fluorided silica-aluminas having a sodium content of under 0.05 weight percent are particularly advantageous.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: April 12, 1994
    Assignee: UOP
    Inventors: Karl Z. Steigleder, Christine M. Conway, David M. Baldwin, Diane C. Dierking