| 简介 |
PURPOSE : A novel catalyst system and a use thereof are provided to increase the activity of the catalyst system in various types of metathesis reactions, thereby reducing the amount of necessary catalyst.
CONSTITUTION : A catalyst system comprises a catalyst for metathesis and at least one salt represented by a chemical formula, K^n+A^z-(where, K is a cation except copper, A is an anion, n is 1, 2 or 3, and z is 1, 2 or 3). The K in the chemical formula is lithium, sodium, potassium rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium, aluminum, gallium, indium, thallium, germanium, tin, lead, arsenic, antimony, bismuth, scandium, yttrium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, technetium, rhenium, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, silver, gold, zinc, cadmium, mercury, and all elements of the rare-earth group. The catalyst system is used in metathesis reaction, specially, ring-closing metathesis, cross-metathesis, or ring-opening metathesis. The catalyst system is used for metathesis of nitrile rubber.
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