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AssigneeStudiengesellschaft Kohle mbH
InventorsAlois Fürstner, Walter Leitner, Daniel Koch, Klaus Langemann, Christian Six
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Cyclic products are prepared by selective olefin metathesis of bifunctional or polyfunctional substrates in the presence of one or several homogeneous or heterogeneous metathesis catalysts in a reaction medium. The invention is characterized in that the substrates contain two or more functional groups in the form of substituted or non-substituted alkene or alkyne units and in that the reaction medium essentially consists of compressed carbon dioxide. Also disclosed is the preparation of cyclic or polymer products according to the disclosed process, the reaction temperature and total pressure being matched to ensure that the density of the reaction medium lies in a range d=0.2-1.5 g·cm−3 and that the product distribution is essentially controlled by the reaction medium density.
A process for the preparation of cyclic products by selective olefin metathesis of bifunctional or polyfunctional substrates in the presence of one or more homogeneous or heterogeneous metathesis catalysts in a reaction medium, characterized in that the substrates contain two or more functional groups in the form of substituted or unsubstituted alkene or alkyne moieties, and the reaction medium comprises compressed carbon dioxide, wherein the reaction temperature and the total pressure are mutually adjusted in such a way that the density of the reaction medium is within a range of d=0.4-1.5 g·cm−3.
A process for the preparation of polymeric products by selective olefin metathesis of bifunctional or polyfunctional substrates in the presence of a homogeneous or heterogeneous metathesis catalyst in a reaction medium, characterized in that the substrates contain two or more functional groups in the form of substituted or unsubstituted alkene or alkyne moieties, and the reaction medium comprises compressed carbon dioxide, wherein the reaction temperature and the total pressure are mutually adjusted in such a way that the density of the reaction medium is within a range of d=0.2-1.3 g·cm−3.
Dependencies are inferred from the claim text.