Process for the production of chlorofluorinated aromatic hydrocarbons
First Claim
1. The process for the production of chlorofluorinated aromatic hydrocarbons by the oxychlorofluorination of aromatic hydrocarbons which comprises reacting a gaseous mixture of a starting material selected from an aromatic hydrocarbon and an aromatic hydrohalocarbon in which the halo atoms are selected from chloro and fluoro, or mixtures thereof, at least 0.10 mole oxygen in an oxygen-containing gas, at least 0.25 mole HCl or equivalent of Cl2 for each C--H bond and C=C bond desired to be reacted in the starting material, and HF, in the presence of a Deacon catalyst supported by a stable, inert metal salt carrier, with the weight percentage of cation in the Deacon catalyst ranging from about 0.6-20 based on the total cation content of the Deacon catalyst and metal salt carrier, at elevated temperatures and with a contact time of from about 0.1-20 seconds.
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Abstract
Chlorofluorinated aromatic hydrocarbons may be effectively produced by an oxychlorofluorination process by reacting a gaseous mixture of a starting material selected from an aromatic hydrocarbon and an aromatic hydrohalocarbon in which the halo atoms are selected from chloro and fluoro, or mixtures thereof, an oxygen-containing gas, a chlorinating agent selected from the group consisting of HCl and Cl2 and mixtures thereof, and HF, in the presence of a Deacon catalyst supported by a stable, inert metal salt carrier.
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Citations
55 Claims
- 1. The process for the production of chlorofluorinated aromatic hydrocarbons by the oxychlorofluorination of aromatic hydrocarbons which comprises reacting a gaseous mixture of a starting material selected from an aromatic hydrocarbon and an aromatic hydrohalocarbon in which the halo atoms are selected from chloro and fluoro, or mixtures thereof, at least 0.10 mole oxygen in an oxygen-containing gas, at least 0.25 mole HCl or equivalent of Cl2 for each C--H bond and C=C bond desired to be reacted in the starting material, and HF, in the presence of a Deacon catalyst supported by a stable, inert metal salt carrier, with the weight percentage of cation in the Deacon catalyst ranging from about 0.6-20 based on the total cation content of the Deacon catalyst and metal salt carrier, at elevated temperatures and with a contact time of from about 0.1-20 seconds.
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55. The process for the production of chlorofluorinated aromatic hydrocarbons by the oxychlorofluorination of aromatic hydrocarbons which comprises reacting a gaseous mixture of a starting material selected from an aromatic hydrocarbon and an aromatic hydrohalocarbon in which the halo atoms are selected from chloro and fluoro, or mixtures thereof, at least 0.25 mole oxygen in an oxygen-containing gas for each C--H bond in the starting material, at least 2 mole HCl or equivalent Cl2 per mole of starting material, and HF, in the presence of a Deacon catalyst supported by a stable, inert metal salt carrier, with the weight percentage of cation in the Deacon catalyst ranging from about 0.6-20 based on the total cation content of the Deacon catalyst and metal salt carrier, at elevated temperatures and with a contact time of from about 0.1-20 seconds.
Specification