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Title: Vapor-phase carbonylation of methanol over Rh-Y zeolite

Abstract

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.

Authors:
 [1]; ; ;
  1. Tokyo Inst. Technol.
Publication Date:
OSTI Identifier:
6355903
Resource Type:
Journal Article
Journal Name:
J. Catal.; (United States)
Additional Journal Information:
Journal Volume: 59:1
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ACETIC ACID; CHEMICAL REACTION YIELD; ACETIC ACID ESTERS; CATALYST SUPPORTS; COMPARATIVE EVALUATIONS; CATALYSTS; CHEMICAL PREPARATION; DEACTIVATION; METHANOL; CARBONYLATION; RHODIUM CHLORIDES; CATALYTIC EFFECTS; RHODIUM COMPOUNDS; ZEOLITES; EXPERIMENTAL DATA; HIGH TEMPERATURE; IODINE COMPOUNDS; SULFATES; TEMPERATURE DEPENDENCE; TIME DEPENDENCE; ALCOHOLS; CARBOXYLIC ACID ESTERS; CARBOXYLIC ACIDS; CHEMICAL REACTIONS; CHLORIDES; CHLORINE COMPOUNDS; DATA; ESTERS; HALIDES; HALOGEN COMPOUNDS; HYDROXY COMPOUNDS; INFORMATION; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MATERIALS; MINERALS; MONOCARBOXYLIC ACIDS; NUMERICAL DATA; ORGANIC ACIDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; REFRACTORY METAL COMPOUNDS; SULFUR COMPOUNDS; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; YIELDS; 400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987); 400201 - Chemical & Physicochemical Properties

Citation Formats

Yashima, T, Hara, N, Orikasa, Y, and Takahashi, N. Vapor-phase carbonylation of methanol over Rh-Y zeolite. United States: N. p., 1979. Web.
Yashima, T, Hara, N, Orikasa, Y, & Takahashi, N. Vapor-phase carbonylation of methanol over Rh-Y zeolite. United States.
Yashima, T, Hara, N, Orikasa, Y, and Takahashi, N. Wed . "Vapor-phase carbonylation of methanol over Rh-Y zeolite". United States.
@article{osti_6355903,
title = {Vapor-phase carbonylation of methanol over Rh-Y zeolite},
author = {Yashima, T and Hara, N and Orikasa, Y and Takahashi, N},
abstractNote = {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.},
doi = {},
journal = {J. Catal.; (United States)},
number = ,
volume = 59:1,
place = {United States},
year = {1979},
month = {8}
}