Development of a supported molten-salt Wacker catalyst for the oxidation of ethylene to acetaldehyde

Journal Article · Thu Dec 01 00:00:00 EST 1988 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(88)90041-3· OSTI ID:6911329

Rao, V; Datta, R ^[1]

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1. Univ. of Iowa, Iowa City (USA)

A modified supported molten-salt Wacker catalyst involving palladium chloride/copper chloride is developed by replacing the conventional aqueous reaction medium (H{sub 2}O + HCl) with a eutectic melt of cuprous chloride and potassium chloride and supporting it on a porous support. Experimental studies for the oxidation of ethylene to acetaldhyde over the supported molten-salt catalyst (SMSC) show the kinetics to be similar to the aqueous-phase Wacker process and the SMSC diffusion-reaction characteristics to be well predicted by the theoretical model of R. Datta and R. G. Rinker. The SMS catalyst was found to be extremely stable owing to the essentially nonvolatile nature of the molten salt whereas the aqueous-phase supported liquid-phase catalyst deactivated rapidly due to the evaporation of the solvent. The developed supported molten-salt catalyst appears to have substantial advantages over the commercial liquid-phase Wacker process. Further, the SMSC technique utilized here should prove to be useful in developing efficient catalysts for many other processes.

• OSTI ID: 6911329
• Journal Information: Journal of Catalysis; (USA), Vol. 114:2; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ACETALDEHYDE
SYNTHESIS
CATALYSTS
CHEMICAL PREPARATION
ETHYLENE
OXIDATION
CATALYSIS
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
COMPARATIVE EVALUATIONS
COPPER CHLORIDES
MOLTEN SALTS
PALLADIUM CHLORIDES
POTASSIUM CHLORIDES
ALDEHYDES
ALKALI METAL COMPOUNDS
ALKENES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COPPER COMPOUNDS
COPPER HALIDES
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
KINETICS
ORGANIC COMPOUNDS
PALLADIUM COMPOUNDS
POTASSIUM COMPOUNDS
REACTION KINETICS
SALTS
TRANSITION ELEMENT COMPOUNDS
020400* - Petroleum- Processing
020500 - Petroleum- Products & By-Products