公开(公告)号：JPH11199559A

公开(公告)日：1999-07-27

申请号：JP26552498

申请日：1998-09-18

Applicant: STANDARD OIL CO OHIO

Inventor： SOCKELL EDWARD J ,  SARNA JOSEPH C ,  KERR ALI ,  GODBOLE SANJAY P

IPC: C07C253/24 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: PROBLEM TO BE SOLVED: To improve HCN recovery rate in the production of acrylonitrile. SOLUTION: This production process of (meth)acrylonitrile comprises the step of transferring a discharged material obtained in the ammoxidation of propylene, etc., to a quenching column, and cooling the hot exhaust gas with a water fume, the step of passing the cooled reaction discharged material to an absorption column from an overhead to absorb a crude acrylonitrile or methacrylonitrile with water, and the step of passing the obtained vapor flow containing HCN through a product cooling device and then a knockout pot, and also comprises bringing the cooled HCN product in contact with a water flow as an improved point.

公开(公告)号：BR9803782A

公开(公告)日：1999-12-14

申请号：BR9803782

申请日：1998-09-14

Applicant: STANDARD OIL CO OHIO

Inventor： SOCKELL EDWARD J ,  KERR ALI ,  SARNA JOSEPH C ,  GODBOLE SANJA Y P

IPC: C07C253/24 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: A process for the enhanced recovery of hydrogen cyanide (HCN) obtained from the reactor effluent of an ammoxidation reaction of propylene or isobutylene comprising passing the reactor effluent through a quench column, an absorber column, a first distillation column, a second distillation column, a cooler and a knock-out pot, wherein the improvement comprises contacting the vapor phase containing hydrogen cyanide with an aqueous stream.