Abstract:
A method of depolymerizing plastic waste using a supported heteropolyacids catalyst is described herein. The method provides with high efficiency a high quality liquid depolymerization product usable as cracker feedstock.
Abstract:
A catalyst mixture comprising (a) particles of solid catalyst component comprising Ti, Mg, Cl, and from 0.2 to 5.0% by weight of particles of an inorganic solid compound having particle size ranging from 0.1 µm to 1 mm containing more than 50% by weight of SiO 2 units.
Abstract:
A process for the preparation of a solid catalyst component for the homo or copolymerization of olefins which comprises Mg, Ti, halogen and an electron donor selected from cycloalkyl ethers, said process comprising (a) dissolving a Mg based compound and a TiCI 3 based compound in a liquid medium further comprising a cycloalkyl ether and a compound of formula R 2 OH where R 2 is a C 1 -C 20 hydrocarbon group, in which the Ti/Mg molar ratio ranges from 0.1 to 0.5, the cycloalkyl ether/Mg ratio ranges from 1 to 4 and the R 2 OH/Mg molar ratio ranges from 1 to 4; and (b) adding, to the solution coming from step (a), SiCI4 in an amount such that the R 2 OH/SiCI4 molar ratio ranges from 0.5 to 1.5 and maintaining the temperature in the range 50-150°C thereby allowing precipitation of the solid catalyst component particles.
Abstract:
A solid catalyst component obtainable by a process comprising: (a) a first step in which a titanium compound of formula Ti(OEt) 4 , is reacted with a Mg based compound at a Ti/Mg molar ratio between 0.2 and 0.4, at a reaction temperature between 110 and 130°C during 2 to 5 hours; and (b) a subsequent step in which the product obtained in (a) is reacted with a Ti compound formula Ti(OR I ) 4-y Cl y , where y is a number between 3 and 4.
Abstract translation:(a)第一步,其中使式Ti(OEt)4的钛化合物与基于Mg Ti / Mg摩尔比为0.2-0.4的化合物,反应温度为110-130℃,时间为2-5小时; 和(b)随后的步骤,其中使(a)中获得的产物与Ti化合物式Ti(OR 1)4-yCl y sub>,其中y是3到4之间的数字。 p>
Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor compound of the following formula (I) in which R1 groups are selected from C 1 -C 15 hydrocarbon groups, R 8 groups, equal or different to each other, are selected from hydrogen, halogen and C 1 -C 15 hydrocarbon groups, optionally containing an heteroatom selected from halogen, O, P, S, N and Si and L is a divalent hydrocarbon group optionally containing heteroatoms selected from halogen, O, P, S, N and Si.
Abstract:
Methods of depolymerizing polyolefin-based material into useful petrochemical products using metal oxides and heat are described. The metal oxides improve the depolymerization reaction by decreasing the onset temperature for the depolymerization, which results in a higher depolymerization rate and a shorter residence time in the depolymerization unit, allowing for a predictable depolymerization reaction, and decreasing the branching or aromatic formations in the product.
Abstract:
A liquid phase process for the polymerization of butene-1 carried out in the presence of a catalyst comprising (a) a solid catalyst component comprising Mg, Ti and an electron donor compound of the following formula (I) in which the R groups, equal to or different from each other, are C 1 -C 10 hydrocarbon groups; (b) an aluminium alkyl cocatalyst and (c) an external electron donor.
Abstract:
Catalyst components component for the (co)polymerization of olefins CH 2 =CHR, in which R is a hydrocarbyl radical with 1-12 carbon atoms, optionally in mixture with ethylene, comprising Ti, Mg, Zn, CI, and an electron donor compound characterized by the fact that more than 50% of the titanium atoms are in the +4 valence state, and that the amount of Zn ranges from 0.1 to 4% by weight based on then total weight of said solid catalyst component.
Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor compound of the following formula (I), in which R2-R8 groups, equal or different to each other, are selected from hydrogen, halogen and C1 -C15 hydrocarbon groups, optionally containing an heteroatom selected from halogen, O, P, S, N, and Si and R9 groups are selected from C1 -C15 hydrocarbon groups optionally containing an heteroatom selected from halogen, O, P, S, N, and Si.
Abstract:
A catalyst system comprising the product obtained by contacting (a) a solid catalyst component containing Mg, Ti, halogen and at least an electron donor compound selected from phenylene aromatic diesters of a specific formula (b) an alkylaluminum cocatalystand (c) an ester of formula R'OOC-(CR" 2 ) m -COOR' in which m is an integer from 2 to 7, the R' groups, equal to or different from each other, are C 1 -C 10 alkyl groups and the R" groups, independently, are hydrogen or C 1 -C 15 hydrocarbon groups.