Vapor-phase carbonylation of methanol over Rh-Y zeolite

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · J. Catal.; (United States)

OSTI ID:6355903

Yashima, T ^[1]; Hara, N; Orikasa, Y; Takahashi, N

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1. Tokyo Inst. Technol.

The activity of Y zeolite, approx. 6% ion-exchanged with rhodium chloride (2 rhodium sites per unit cell) at 423/sup 0/-473/sup 0/K was higher and more stable than rhodium chloride/alumina, silica-alumina, silica, cation exchange resin, or anion exchange resin, or Y zeolite with higher loadings, and was about the same as Y zeolite 6% ion-exchanged with rhodium nitrate or sulfate. Methyl iodide was used as cocatalyst. Methyl acetate was the only product of the carbonylation at low residence times (to 8500 g sec/mole), but at higher time factors, with increasing temperatures, and increasing methyl iodide partial pressure, acetic acid was also produced. Pretreatment in nitrogen above 473/sup 0/K, pre-exposure to water vapor, or hydrogen-reduction deactivated the catalyst. These results and literature data suggested that the active sites are formed from trivalent rhodium cations anchored in the zeolite framework.

• OSTI ID: 6355903
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 59:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACETIC ACID
ACETIC ACID ESTERS
ALCOHOLS
CARBONYLATION
CARBOXYLIC ACID ESTERS
CARBOXYLIC ACIDS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COMPARATIVE EVALUATIONS
DATA
DEACTIVATION
ESTERS
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ION EXCHANGERS
IODINE COMPOUNDS
ION EXCHANGE MATERIALS
MATERIALS
METHANOL
MINERALS
MONOCARBOXYLIC ACIDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHODIUM CHLORIDES
RHODIUM COMPOUNDS
SULFATES
SULFUR COMPOUNDS
SYNTHESIS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YIELDS
ZEOLITES