FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for extraction of acrylonitrile, methacrylonitrile or hydrogen cyanide obtained from the reaction flow in the ammoxidation reaction of propane, propylene or isobutylene that involves passing the reactor flow through absorption column, extraction column and head fraction column. Method involves using such regimen of the process to prevent formation of an aqueous phase above feeding plate in the head fraction column. Method provides reducing unfavorable polymerization of hydrogen cyanide that provides significant decreasing or excluding stoppage of the head fraction column.
EFFECT: improved method for extraction.
12 cl, 1 dwg, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR EXTRACTION OF ORGANIC MATERIAL COMPRISING HYDROGEN CYANIDE | 1999 |
|
RU2258695C2 |
| UNSATURATED MONONITRILE PRODUCTION PROCESS (OPTIONS) | 2000 |
|
RU2247718C2 |
| UNSATURATED MONONITRILE PRODUCTION PROCESS | 1998 |
|
RU2242459C2 |
| CRUDE ACETONITRILE PURIFICATION PROCESS | 2001 |
|
RU2267481C2 |
| METHOD OF SEPARATING ACRYLONITRILE OR METHACRYLONITRILE | 1997 |
|
RU2178410C2 |
| METHOD OF POLYMERIZATION INHIBITION DURING ISOLATION AND PURIFICATION OF UNSATURATED MONONITRILES | 2003 |
|
RU2324677C2 |
| IMPROVED METHOD FOR COMBINED PRODUCTION OF ACRYLONITRILE AND HYDROGEN CYANIDE | 2009 |
|
RU2494092C2 |
| METHOD OF EXTRACTION OF ACRYLONITRILE AND METHACRYLONITRILE | 1997 |
|
RU2196766C2 |
| EVAPORATION PLANT FOR PROCESS STREAM | 2015 |
|
RU2709618C2 |
| METHOD FOR ISOLATION OF OLEFIN-UNSATURATED NITRILES | 1999 |
|
RU2210566C2 |
