Abstract: A metallocene catalyst may be temporarily and reversibly passivated by contact with an effective amount of an unsaturated hydrocarbon passivating compound.
Type:
Grant
Filed:
September 2, 2004
Date of Patent:
May 9, 2006
Assignee:
Innovene USA LLC
Inventors:
Richard A. Hall, Jerome A. Streeky, Roger Uhrhammer
Abstract: A process for the recovery of unreacted ammonia from the effluent from a reaction zone used to produce acrylonitrile or methacrylonitrile comprising quenching the reactor effluent with an aqueous solution of ammonium phosphate in at least two stages, thereby capturing the ammonia component of the effluent. The captured ammonia may be recovered by heating the aqueous ammonium phosphate, which then may be recycled. Contaminants present in the aqueous ammonium phosphate may be removed, for example by solvent extraction or wet oxidation, prior to recycle.
Type:
Application
Filed:
July 21, 2005
Publication date:
April 27, 2006
Applicant:
Innovene USA LLC
Inventors:
Albert Shuki, Kenneth Keckler, Thomas Bowman, Thomas Szabo