The invention relates to a process for the polymerization of olefins comprising the comprising the steps of a. Polymerizing olefins in a reaction mixture comprising monomers, diluent, processing as aids to prepare a product stream comprising polyolefins, monomers and diluent; b. Removing the polyolefins from the product stream to obtain a purge stream; c. Removing gaseous components from the purge stream to obtain a liquid fraction; d. Treating the liquid fraction with at least one ionic liquid to obtain a fraction containing unsaturated hydrocarbons; e. Recycling the fraction containing unsaturated hydrocarbons to the reaction mixture, optionally after purification of said fraction containing unsaturated hydrocarbons. The invention also relates to an olefin polymerization system comprising a polymerization reactor, a purge vessel, a vent gas recovery and an ionic liquid separator for separating liquid alkenes from liquid alkanes, wherein the liquid alkenes which are separated from the alkanes in the ionic liquid separator can be recycled to the polymerization reactor.

The invention relates to a process for the polymerization of olefins comprising the comprising the steps of a. Polymerizing olefins in a reaction mixture comprising monomers, diluent, processing as aids to prepare a product stream comprising polyolefins, monomers and diluent; b. Removing the polyolefins from the product stream to obtain a purge stream; c. Removing gaseous components from the purge stream to obtain a liquid fraction; d. Treating the liquid fraction with at least one ionic liquid to obtain a fraction containing unsaturated hydrocarbons; e. Recycling the fraction containing unsaturated hydrocarbons to the reaction mixture, optionally after purification of said fraction containing unsaturated hydrocarbons. The invention also relates to an olefin polymerization system comprising a polymerization reactor, a purge vessel, a vent gas recovery and an ionic liquid separator for separating liquid alkenes from liquid alkanes, wherein the liquid alkenes which are separated from the alkanes in the ionic liquid separator can be recycled to the polymerization reactor.

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

A terpolymer compositions made from or containing: A) From 80 wt % to 97 wt %; of a first propylene, ethylene, 1-butene terpolymer having: i) the content of ethylene derived units ranging from 0.5 wt % to 3.2 wt %; ii) the content of 1-butene derived units ranging from 7.2 wt % to 14.8 wt %; and B) From 20 wt % to 3 wt %; of a second propylene, ethylene, 1-butene terpolymer having: i) the content of ethylene derived units ranging from 0.5 wt % to 3.2 wt %; ii) the content of 1-butene derived units ranging from 14.4 wt % to 26.5 wt %; and the terpolymer composition having the melt flow rate, MFR, measured according to ISO 1133 at 230° C. with a load of 2.16 kg, ranging from 3.0 g/10 min to 20.0 g/10 min; the sum of the amounts of A) and B) being 100 wt %.

A terpolymer compositions made from or containing: A) From 80 wt % to 97 wt %; of a first propylene, ethylene, 1-butene terpolymer having: i) the content of ethylene derived units ranging from 0.5 wt % to 3.2 wt %; ii) the content of 1-butene derived units ranging from 7.2 wt % to 14.8 wt %; and B) From 20 wt % to 3 wt %; of a second propylene, ethylene, 1-butene terpolymer having: i) the content of ethylene derived units ranging from 0.5 wt % to 3.2 wt %; ii) the content of 1-butene derived units ranging from 14.4 wt % to 26.5 wt %; and the terpolymer composition having the melt flow rate, MFR, measured according to ISO 1133 at 230° C. with a load of 2.16 kg, ranging from 3.0 g/10 min to 20.0 g/10 min; the sum of the amounts of A) and B) being 100 wt %.

A terpolymer compositions made from or containing: A) From 80 wt % to 97 wt %; of a first propylene, ethylene, 1-butene terpolymer having: i) the content of ethylene derived units ranging from 0.5 wt % to 3.2 wt %; ii) the content of 1-butene derived units ranging from 7.2 wt % to 14.8 wt %; and B) From 20 wt % to 3 wt %; of a second propylene, ethylene, 1-butene terpolymer having: i) the content of ethylene derived units ranging from 0.5 wt % to 3.2 wt %; ii) the content of 1-butene derived units ranging from 14.4 wt % to 26.5 wt %; and the terpolymer composition having the melt flow rate, MFR, measured according to ISO 1133 at 230° C. with a load of 2.16 kg, ranging from 3.0 g/10 min to 20.0 g/10 min; the sum of the amounts of A) and B) being 100 wt %.

A catalyst for the polymerization of olefins made from or containing (a) a solid catalyst component containing Mg, Ti and optionally an internal electron donor compound (ID), (b) an aluminum alky compound, and (c) an external electron donor (ED) selected from non-aromatic diazo compounds.

A catalyst for the polymerization of olefins made from or containing (a) a solid catalyst component containing Mg, Ti and optionally an internal electron donor compound (ID), (b) an aluminum alky compound, and (c) an external electron donor (ED) selected from non-aromatic diazo compounds.

An ethylene copolymer comprising ethylene and at least one alpha olefin having from 4 to 8 carbon atoms has a density f from 0.940 to 0.960 g/cm.sup.3, a molecular weight distribution, Mw/Mn of from 9 to 12, and a Z-average molecular weight, Mz of greater than 500,000. The ethylene copolymer is made in a multi-zone reactor system under solution phase polymerization conditions and is useful in the preparation of biaxially oriented polyethylene (BOPE) films.