Acrylonitrile recovery process
AssigneeThe Standard Oil Company
InventorsPaul Trigg Wachtendorf, Sanjay Parushottam Godbole, Jeffrey Earle Rinker
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Abstract
A process for the recovery of acrylonitrile or methacrylonitrile obtained from the reactor effluent of an ammoxidation reaction of propylene or isobutylene comprising passing the reactor effluent through an absorber column and recovery column and stripper column wherein the improvement comprises increasing the recovery column top pressure by mechanical means by about 0.1 to 5 psi to improve the hydraulic capacity of the recovery and stripper columns.
Claims8
A process for the recovery of acrylonitrile or methacrylonitrile obtained from the reactor effluent of an ammoxidation reaction of propylene or isobutylene comprising passing the reactor effluent through an absorber column, a recovery column operating at a first top pressure of no greater than 5 psig and fitted with an overhead line to remove product acrylonitrile or methacrylonitrile for further purification and recovery and a stripper column wherein the improvement comprises placing a pressure control means on the overhead line and adjusting the pressure control means to increase the first top pressure to a second top pressure which is between about 0.1 to 5 psi greater than the first top pressure to improve the hydraulic capacity of the recovery and stripper columns.
Dependencies are inferred from the claim text.