Reactions of primary and secondary alkanols over platinum-, iridium-, and rhodium-silica (cab-o-sil) catalysts in the presence of hydrogen variables affecting ether formation

Journal Article · Tue Jan 01 04:00:00 EST 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90345-0· OSTI ID:6419812

Licht, E ^[1]; Schaechter, Y; Pines, H

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1. Bar Ilan Univ.

The reaction of 3.1:1 hydrogen to 2-propanol, 2-butanol, or 2-pentanol over silica-supported 20% platinum, 18% iridium, or 10% rhodium in a flow reactor at 130/sup 0/-190/sup 0/C yielded ethers and alkenes. The alkenes were hydrogenated to alkanes under the reaction conditions. Under identical conditions, the conversion increased and the ether selectivity decreased with increasing carbons in the alkanols. In the reaction of 2-propanol over rhodium, the conversion increased and the ether selectivity decreased with increasing contact time. The reactions of n-butanol on supported iridium yielded 94.7 and 83.3% di-n-butyl ether at 13 and 60% conversion, respectively; yields were lower on platinum. The main product of neopentyl alcohol on platinum was isobutane, and on iridium, it was dineopentyl ether with 57.1% selectivity. The results were compared with previously published results obtained with silica-supported palladium and the reaction paths and relative rates of dehydroxylation-dehydroxymethylation and dehydration were discussed.

• OSTI ID: 6419812
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALCOHOLS
ALKENES
CATALYSTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CONVERSION
DATA
ELEMENTS
ETHERS
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGENATION
HYDROXY COMPOUNDS
INFORMATION
IRIDIUM
KINETICS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
REACTION KINETICS
RHODIUM
SYNTHESIS
TRANSITION ELEMENTS