Rhodium complx catalyzed methanol carbonylation. Effects of medium and varius additives
Kinetic experiments in an isothermal batch reactor demonstrated the influence of water concentration (0-27 m), the addition of strong acids (phosphoric, sulfuric, and hydrochloric acid), solvents (acetic acid, benzene, methyl ethyl ketone, and dioxane) and promoters (methyl iodide and hydrogen iodide) on the carbonylation reaction previously studied. The best medium for the reaction was acetic acid. When a 57% aqueous hydrogen iodide solution was used as promoter, the water content was adequate, but when methyl iodide was used, an equivalent amount of water had to be added to reach the same reaction rate. The reaction was zero order with respect to methanol over a broad concentration range when a small amount of phosphoric acid was added. When dioxane was the solvent, the polarity of the medium was adjusted to the optimal value by adding water. The same set of standard conditions was used as reference for all the experiments: 40 atm carbon monoxide pressure (25/sup 0/C); 182.6/sup 0/C 3 M methanol; 0.0046 M rhodium as RhCl/sub 3//4.2H/sub 2/O; 0.5 M iodine as 57% aqueous hydrogen iodide solution; and acetic acid as solvent. Tables and graphs.
- Research Organization:
- Univ. of Denver, CO
- OSTI ID:
- 6108043
- Journal Information:
- Ind. Eng. Chem., Prod. Res. Dev.; (United States), Vol. 16:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
METHANOL
CARBONYLATION
ADDITIVES
CATALYSTS
CHEMICAL REACTION KINETICS
HIGH TEMPERATURE
HYDRIODIC ACID
HYDROCHLORIC ACID
MEDIUM PRESSURE
METHYL IODIDE
MOISTURE
ORGANIC SOLVENTS
PHOSPHORIC ACID
PHYSICAL PROPERTIES
STANDARDIZATION
SULFURIC ACID
THERMODYNAMIC PROPERTIES
WATER
ALCOHOLS
CHEMICAL REACTIONS
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
IODINATED ALIPHATIC HYDROCARBONS
IODINE COMPOUNDS
KINETICS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
SOLVENTS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)