Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1975-05-14
1977-05-24
Garvin, Patrick P.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252433, 252434, 252436, 252439, 252441, 208143, 260667, B01J 3128, B01J 2712
Patent
active
040254593
ABSTRACT:
Adding liquid HF or liquid Bronsted acids containing fluorine to palladium results in a catalyst which demonstrates enhanced hydrogenation activity on the order of 10 to 144 times that of palladium by itself. Adding a Friedel-Crafts catalyst containing fluorine (e.g. BF.sub.3, TaF.sub.5) to the liquid HF or liquid Bronsted acids containing fluorine leads to even greater hydrogenation rate increases, e.g. 3500 times. Addition of liquid HF or Friedel-Crafts catalysts containing fluorine in HF or Bronsted acid containing fluorine to platinum also results in a superior catalyst possessing enhanced hydrogenation rates but to a lesser degree than with palladium. However, such liquid acid promoted platinum catalysts are more tolerant to sulfur, than are palladium catalysts, making them attractive as heavy ends, resid and coal liquid hydrogenation catalysts. Iridium has also been discovered to be a good hydrogenation catalyst. When it is used in conjunction with liquid HF, fluorine containing Bronsted acids or Friedel Craft catalysts containing fluorine in liquid HF or Bronsted acid containing fluorine, hydrogenation is increased .about. 150 fold. It is also more tolerant to sulfur than is palladium.
The liquid acid promoted palladium, platinum or iridium catalyst may be supported on a material resistant to acid and not containing any silicon, aluminum or oxygen; carbon, charcoal, teflon etc. meets this requirement.
A process for the hydrogenation of unsaturated hydrocarbon fractions comprises dissolving said unsaturated hydrocarbon fraction in a liquid acid system, said system being selected from the group consisting of liquid HF or Bronsted acid containing fluorine or fluorine-containing Friedel Crafts in liquid HF or Bronsted acid and contacting the resulting solution with the palladium, platinum or iridium catalyst in a pressurized hydrogen atmosphere in the presence of said liquid HF, fluorine containing Bronsted acid or fluoride containing Friedel-Crafts in HF or Bronsted acid system at a temperature sufficient to facilitate the reaction and avoid hydrocracking.
REFERENCES:
patent: 2406869 (1946-09-01), Upham
patent: 2425991 (1947-08-01), Burk et al.
patent: 2744148 (1956-05-01), Ruh et al.
patent: 2848377 (1958-08-01), Webb
patent: 3409684 (1968-11-01), Aristoff
patent: 3413362 (1968-11-01), Otaku
patent: 3497488 (1970-02-01), Dawans et al.
patent: 3590025 (1971-06-01), Tittle
patent: 3799867 (1974-03-01), Cardwell et al.
Allocca Joseph J.
Exxon Research and Engineering Company
Garvin Patrick P.
LandOfFree
Noble metal hydrogenation catalysts promoted by fluoride contain does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Noble metal hydrogenation catalysts promoted by fluoride contain, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noble metal hydrogenation catalysts promoted by fluoride contain will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-535781