Atofina-PCUK cycle 3961646 178380042 2007-12-16T22:27:21Z ClueBot 4928500 Reverting possible vandalism by [[Special:Contributions/24.113.135.180]] to version by Smokefoot. False positive? [[User:ClueBot/FalsePositives|report it]]. Thanks, [[User:ClueBot|]]. (123678) (Bot) The '''Atofina-PCUK cycle''' is an industrial process for the manufacture of [[hydrazine]]. [[Ammonia]] and [[hydrogen peroxide]] are the starting points of the cycle. [[Acetone]] is consumed and regenerated in the reaction. The cycle begins with ammonia reacting with the acetone, forming water and the acetone [[imine]]. Next, hydrogen peroxide oxidizes this imine to give a three-membered NH-O-C ring with the two methyl groups connected to the carbon. A second ammonia reacts with release of water to form a [[hydrazine]] derivative (CH<sub>3</sub>)<sub>2</sub>CNNH<sub>2</sub>. The NH<sub>2</sub> group reacts with a second molecule of acetone, with loss of another molecule of water, to form (CH<sub>3</sub>)<sub>2</sub>CNNC(CH<sub>3</sub>)<sub>2</sub>. Water reacts with this diimine to form hydrazine and regenerates the acetone. The only waste product is water. {{chem-stub}}