FIELD: technological processes.
SUBSTANCE: invention relates to a method for inhibiting side processes occurring in extractive rectification of C4-hydrocarbon mixtures using acetonitrile. Process is carried out in the presence of a nitrogen-containing molecular entity. As a nitrogen-containing molecular entity, a mixture of piperazine, triethanolamine and sodium nitrite in a weight ratio 1–2.5:1–3:0.5–1, which is dosed into an aqueous solution of acetonitrile circulating in the system at a rate of 0.1–0.2 % by weight of the water content in acetonitrile.
EFFECT: proposed method makes it possible to suppress side processes occurring during extractive rectification of C4-hydrocarbon mixtures, such as the hydrolysis of acetonitrile, corrosion of equipment and polymerization of diene hydrocarbons, and can find application in petrochemical industry in production of diene hydrocarbons.
1 cl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SEPARATING C4-C5-HYDROCARBON MIXTURE OF DIFFERENT SATURATION DEGREE | 0 |
|
SU802251A1 |
| PROCESS FOR RECOVERY AND PURIFICATION OF DIVINYL | 1968 |
|
SU358927A1 |
| METHOD OF SEPARATING C4 OR C5 HYDROCARBON MIXTURES HAVING DIFFERENT DEGREE OF SATURATION | 0 |
|
SU697491A1 |
| PREVENTIVE METHOD OF THERMOPOLYMERISATION INHIBITORS DEACTIVATION | 2007 |
|
RU2344115C2 |
| METHOD OF EXTRACTION ISOPRENE | 1979 |
|
SU772074A1 |
| 0 |
|
SU423786A1 | |
| METHOD OF PREPARING CONCENTRATE AND HIGH-OCTANE COMPONENTS | 1998 |
|
RU2132838C1 |
| METHOD OF INHIBITING HYDROLYSIS OF DIMETHYLCORMAMIDE OR DIMETHYLACETAMIDE IN PROCESSES OF RECOVERY OF DIENE HYDROCARBONS BY EXTRACTIVE RECTIFICATION | 1995 |
|
RU2114102C1 |
| METHOD OF SEPARATING C OR C HYDROCARBONS | 1998 |
|
RU2143418C1 |
| METHOD FOR SEPARATION OF C-HYDROCARBON FRACTIONS | 2002 |
|
RU2213721C1 |
