Method for stopping and starting an acrylamide reactor

Details Method for stopping and starting an acrylamide reactor Method for stopping and starting an acrylamide reactor

C - Chemistry, Metallurgy

07

C

260/554.2

C07C 231/06 (2006.01) B01J 23/72 (2006.01) C07C 233/09 (2006.01)

Patent

CA 1298312

ABSTRACT Disclosed is a method for stopping and starting a reactor equipped with a heat exchanger, a catalyst settler, a catalyst filter and the like, which method is suitable for use in a process for the preparation of acrylamide by reacting acrylonitrile with water in the presence of a metallic copper-based catalyst used as a suspended bed. According to this method, various undesired phenomena which may occur at the beginning of operation can be prevented by discharging the metallic copper-based catalyst until the total amount of metallic copper and copper oxides present in the catalyst remaining in the reactor is not greater than a certain level based on the amount of metallic copper catalyst used at the beginning of the operation, or by discharging the catalyst until the amount of copper oxides is not greater than a certain level and then establishing an inert environ- ment within the reactor.

528611

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