Methods and devices for controlling the reaction by...

C - Chemistry – Metallurgy – 07 – C

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C07C 51/31 (2006.01) B01J 10/00 (2006.01) B01J 19/00 (2006.01) C07C 55/14 (2006.01)

Patent

CA 2263605

Methods and devices for controlling the reaction rate and/or reactivity of a hydrocarbon to an intermediate oxidation product, such as an acid, within predetermined limits, are disclosed. Control of the reaction rate and/or reactivity within predetermined limits is achieved by monitoring and controlling the oxidant consumption rate. According to the present invention, examples of ways to determine the oxidant consumption rate include, but are not limited to, monitoring the flow rates of incoming and outgoing oxidant, monitoring pressure differentials after temporarily ceasing entry and exit of gases, and monitoring the flow rates of incoming and outgoing gases, and monitoring the rates of incoming and outgoing hydrocarbon. The methods and devices of the present invention are particularly advantageous in the case that the hydrocarbon is cyclohexane, the intermediate oxidation product is adipic acid, the solvent is acetic acid, the catalyst is cobalt (II) acetate tetrahydrate, and the initiator or promoter is cyclohexane, or acetaldehyde, or a mixture thereof.

Procédés et dispositifs servant à commander soit la vitesse de réaction, soit la capacité réactionnelle d'un hydrocarbure par rapport à un produit d'oxydation intermédiaire, tel qu'un acide, dans des limites prédéterminées. On commande la vitesse ou la capacité réactionnelles au moyen du contrôle et de la régulation de la vitesse à laquelle l'oxydant se consume. L'invention présente des exemples de détermination de cette vitesse, tels que, de façon non exhaustive, le contrôle des débits d'arrivée et de sortie de l'oxydant, le contrôle des différences de pression après la cessation temporaire de l'entrée et de la sortie de gaz, et le contrôle des vitesses d'entrée et de sortie de l'hydrocarbure. Ces procédés et ces dispositifs sont particulièrement avantageux si l'hydrocarbure est cyclohexane, le produit d'oxydation intermédiaire de l'acide adipique, le solvant de l'acide acétique, le catalyseur du tétrahydrate acétate de cobalt (II) et le déclencheur de la réaction cyclohexane ou acétaldéhyde ou un mélange des deux.

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