FIELD: petroleum chemistry.
SUBSTANCE: invention relates to petrochemical industry, in particular, to synthesis of cyclic 1,3-butadiene dimmers:4-vinylcyclohexane-1 and cyclooctadiene-1,4. The cyclic butadiene-1,3 dimers are produced by thermal dimerization in gas phase at increased temperature and pressure. Dimerization of butadiene-1,3 is effected in gas phase in a hydrogen atmosphere with the hydrogen to butadiene-1,3 ratio of (0.5-5.0): 1. In these conditions, the process occurs with a minimum formation of high-boiling by-products of butadiene-1,3 polymerization, that is, oligomers.
EFFECT: increase in process selectivity and efficiency, decrease in feedstock consumption.
1 tbl, 12 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING CYCLIC BUTADIENE DIMERS | 2010 |
|
RU2444506C2 |
| METHOD OF CYCLIC DIMERIZATION OF CONJUGATE DIENS | 0 |
|
SU658118A1 |
| METHOD FOR COMBINED SYNTHESIS OF LINEAR CYCLIC HOMO- AND CODIMERS OF STYRENE AND α-METHYLSTYRENE | 2010 |
|
RU2424221C1 |
| METHOD FOR COMBINED SYNTHESIS OF LINEAR AND CYCLIC HOMO- AND CODIMERS OF STYRENE AND ALPHA-METHYLSTYRENE | 2010 |
|
RU2428407C1 |
| CATALYST FOR DIMERIZATION AND CODIMERIZATION OF CONJUGATED DIENE HYDROCARBONS | 1995 |
|
RU2083278C1 |
| LOW-MOLECULAR POLYBUTENE PRODUCTION PROCESS | 1999 |
|
RU2160285C1 |
| METHOD OF PRODUCING CYCLIC HOMO- AND CO-DIMERS OF STYRENE AND ALPHA-METHYLSTYRENE | 2010 |
|
RU2430079C1 |
| METHOD OF PRODUCING LINEAR STYRENE DIMERS | 2007 |
|
RU2349568C1 |
| METHOD OF PRODUCING LINEAR STYRENE DIMERS | 2007 |
|
RU2349567C1 |
| METHOD OF LINEAR STEROL DIMER | 2007 |
|
RU2350591C1 |
