Carbochlorination of metal oxides with phosgene

Adelman, D. J.; Burnet, G.

doi:10.1002/aic.690330109

Cited by 8 publications

(1 citation statement)

References 15 publications

(10 reference statements)

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“…The most often used chlorinating agents for that purpose are: chlorine (Uchumira et al, 1963;Rosner and Allendorf, 1965;Nair et al, 1987;SzCpvolgyi et al, 1988); chlorine in the presence of carbon (Saeki et al, 1965a(Saeki et al, , 1965bFuwa et al, 1978;Biceroglu and Gauvin, 1980; Barin and Shuler, 1980;Nolasco, 1983), a mixture of chlorine and carbon monoxide (Akimoto et al, *Author to whom correspondence should be addressed. Milne, 1976;Alder, 1977;Muller et al, 1979; Rivarola et al, 1981;Rub et al, 1988;phosgene (SzCpvolgyi et al, 1988;Adelman and Burnet, 1987) and carbon tetrachloride (Podoinikova and Chernyi, 1963;Papa et al, 1977;Bertdi et al, 1980;Rivarola et al, 1982;Ojeda et al, 1983;Ruiz and Rivarola, 1983;Blumenthal and Hauthal, 1987;Herrick et al, 1988;.…”

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confidence: 99%

Kinetic study of the reaction between molybdenum trioxide and gaseous carbon tetrachloride

1994

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The kinetics of the chlorination reaction of molybdenum trioxide with gaseous carbon tetrachloride has been studied at temperatures between 713 and 753 K. The effects of temperature, reaction time, residence time and gaseous reactant concentration on conversion were studied throughout the reaction. In all cases, there was an increase in conversion when the above operating variables were increased. The kinetic model proposed is consistent with and correlates the experimental data. In the range studied for the different variables, the step that controls the rate of reaction is the surface chemical reaction. Values of the rate constant and the activation energy were estimated.

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Kinetic study of the reaction between molybdenum trioxide and gaseous carbon tetrachloride

1994

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Carbochlorination of dispersed oxides in a molten salt reactor

Dobbins

Burnet

1988

AIChE Journal

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Reaction mechanism and rates were determined from 803 to 1,073 K for the carbochlorination of AI,O, and of Al, Si and Fe-mixed oxides using CI, and C slurried in a stirred melt of NaCI-AICI,. Alumina chlorination rates of 0.33-2.0 x kmol/s were obtained using C:melt weight ratios between 1:21 and 1:42. The reaction rate was proportional to C loading at temperatures below 923 K, while gas-liquid mass transfer was rate-controlling at higher temperatures. Carbochlorination of the combined oxides in coal fly ash at 923 K and oxide conversions less than about 50% was also gas-liquid mass-transfer-controlled. At higher conversions, dissolution became the rate-controlling factor. A 40% (molar) AICI, melt was more effective than a 48% AICI, melt for the selective chlorination of AI,O, over SiO,.

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IR study of chlorination of alumina employing mixtures of gaseous chlorine and carbon monoxide

Rohner¹,

Sharma²,

Richarz³

1989

Chem Eng & Technol

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The chlorination of an alumina with BET surface area of 100 m2/g has been studied in situ by transmission IR measurements at about 670 K. The chlorinating gases consisting of C1, and CO were employed individually and in equimolar proportion. The IR results do not reveal the presence of a phosgene surface species which could support the only mechanism proposed so far to explain the chlorination reaction. A detailed alternative reaction mechanism is suggested for the high tempcraturc chlorination reaction, taking into account the IR results, together with the known electron donor-acceptor properties of the activated alumina and the reaction gases: C1, molecules accept electrons from oxide ions with a lower coordination number on the alumina surface, leading to the formation of C1-and Oad. While C1-yields AlCl,, Oad reacts further with CO producing CO,.

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Carbochlorination of metal oxides with phosgene

Cited by 8 publications

References 15 publications

Kinetic study of the reaction between molybdenum trioxide and gaseous carbon tetrachloride

Kinetic study of the reaction between molybdenum trioxide and gaseous carbon tetrachloride

Carbochlorination of dispersed oxides in a molten salt reactor

IR study of chlorination of alumina employing mixtures of gaseous chlorine and carbon monoxide

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