| 摘要 |
Cycloolefins are obtained by the polymerization of aliphatic conjugated diolefins in the presence of a nickel carbonyl catalyst and, as activator, isobutylene and/or di-isobutylene. The feed may be butadiene, which forms 1,5-cyclooctadiene, isoprene, piperylene, 2,3-dimethylbutadiene, phenyldiolefins or 2,4-hexadienes. The catalyst is a nickel carbonyl organic phosphine, phosphite, stibine, antimonite or arsenite used in amounts of 0,1-10% by weight of diene. The weight ratio of activator to catalyst is 13:1 to 1:2. Solvent such as dicyclopentadiene, benzene, 1,5-cyclooctadiene, tetrahydrofuran, toluene, p-cymene, petroleum ether or petroleum naphtha may be present. Reaction is effected at 90 DEG -150 DEG C. and 0-1790 p.s.i.g.ALSO:Halogenated cycloolefins are obtained by the polymerization of aliphatic halogenated conjugated diolefins in the presence of a nickel carbonyl catalyst and as activator isobutylene and/or di-isobutylene. The starting material may be chloroprene, which forms dichlorocyclooctadiene-1,5, 2,3-dichlorobutadiene and chlorofluorobutadienes. The catalyst may be a nickel carbonyl organic phosphine, phosphite, stilbine, antimonite or arsenite in amounts of 0.1-10% by weight of diene. The ratio of activator to catalyst may be from 13:1 to 1:2 by weight. Solvents such as dicyclopentadiene, benzene, 1,5-cyclooctadiene, tetrahydrofuran, toluene, p-cymene, petroleum ether or petroleum naphtha may be present. Temperatures of 90-150 DEG C. and pressures of 0-1790 p.s.i.g. can be used. Also present may be polymerization inhibitors and drying agents. |
