[EN] ETHYLENE TETRAMERIZATION CATALYSTS COMPRISING P-N-P LIGANDS<br/>[FR] CATALYSEURS DE TÉTRAMÉRISATION D'ÉTHYLÈNE COMPRENANT DES LIGANDS P-N-P
申请人:NOVA CHEM INT SA
公开号:WO2010034102A1
公开(公告)日:2010-04-01
A new P-N-P ligand having the general formula (Ph1)(Ph2)P-N-P1CPh3)(Ph4) R2 wherein each of Ph1, Ph2, Ph3 and Ph4 is a phenyl group bonded to a phosphorus group, and R2 is selected from the group consisting of hydrogen, C1-20 hydrocarbyl and silyl, is useful in ethylene tetramerization Pn combination with i) a source of chromium and 11) an activator such as methylalumoxane, the ligand of this invention may be used to prepare an oligomer product that contains a mixture of hexenes and octenes When produced under preferred reaction conditions, the hexenes and octenes produced with this ligand contain very low levels of internal olefins.
A new P—N—P ligand is useful in ethylene oligomerizations. In combination with i) a source of chromium and ii) an activator such as methylalumoxane; the ligand of this invention may be used to prepare an oligomer product that contains a mixture of hexenes and octenes. The hexenes and octenes produced with this ligand contain very low levels of internal olefins when produced under preferred reaction conditions.
SEPARATION OF COMPONENTS FROM A MULTI-COMPONENT HYDROCARBON STREAM WHICH INCLUDES ETHYLENE
申请人:Gildenhuys Johannes Jochemus
公开号:US20120199467A1
公开(公告)日:2012-08-09
A process to separate a multi-component hydrocarbon stream which includes ethylene and other components with at least some of the components being present in a number of phases, is provided. The process includes in a first flash stage, flashing the multi-component hydrocarbon stream, from an elevated pressure and temperature to a pressure in the range of 10-18 bar(a), producing a first ethylene-containing vapour stream at a pressure in the range of 10-18 bar(a) and a multi-phase stream which includes some ethylene. In a second flash stage, the multi-phase stream is flashed to a pressure of less than 6 bar(a), producing a second vapour stream at a pressure of less than 6 bar(a) and a bottoms stream. The first ethylene-containing vapour stream is removed from the first flash stage, the second vapour stream is removed from the second flash stage and the bottoms stream is removed from the second flash stage.