Process for preparing bicyclo[2.2.1] heptane derivatives
申请人:——
公开号:US20030045762A1
公开(公告)日:2003-03-06
The invention relates to economical and efficient methods for producing 2-methylene-3-methylbicyclo[2,2,1]heptane, 2,3-dimethylbicyclo[2.2.1]hept-2-ene and the like that are useful for materials of producing base oil of traction drive fluid for traction drive lubricating oil. The methods comprise reacting one or more C
3-4
acyclic olefins with cyclopentadiene and isomerizing the resulting bicyclo[2.2.1]heptene derivatives in the presence of an isomerization catalyst to give one or more bicyclo[2.2.1]heptane derivatives.
The present invention provided a high-density fuel oil comprising an isomerized product prepared by isomerizing an alicyclic saturated hydrocarbon represented by the following formula in the presence of an acid catalyst: ##STR1## wherein each of m and n is 0 or 1, and each of R.sup.1 to R.sup.3 is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, but the number of the total carbons of R.sup.1 to R.sup.3 is within the range of 1 to 3.
Dimethylnorbornene, isopropylnorbornene or a mixture thereof is copolymerized by ring opening with (1) at least one acyclic monoolefin or nonconjugated acyclic olefin and (2) optionally, dicyclopentadiene. The copolymers are thermoplastics which can be calendered and thermoformed, for example, to make rigid automotive goods such as glovebox covers, hubcaps and the like.