Abstract:
A pre-polymerized catalyst component for the polymerization of olefins endowed with high activity and morphological stability comprises (i) a non-stereospecific solid catalyst component comprising Ti, Mg and a halogen and having a porosity, due to pores with radius up to 1 μm, ranging from 0.2 to 0.8 cm 3 /g and (ii) an amount of an ethylene/alpha-olefm block (co)polymer ranging from 0.1 up to 5g per g of said solid catalyst component (i), said pre-polymerized catalyst component being characterized by a mercury porosity due to pores up to 1 μm of less than 70% the mercury porosity value of the said non-stereospecific solid catalyst component (i).
Abstract:
A method of depolymerizing plastic waste using a doped silica catalyst is described herein. The method provides with high efficiency a high quality liquid depolymerization product which can be used as cracker feedstock.
Abstract:
A method of depolymerizing plastics using a halloysite catalyst is described herein. The method reduces the energy required for the depolymerization process while achieving improved depolymerization results.
Abstract:
A pre-polymerized catalyst component for the polymerization of olefins, characterized by comprising a non-stereospecific solid catalyst component, comprising Ti, Mg and a halogen and an amount of a (co)polymer of an alpha-olefin CH 2 =CHR1, wherein R is a C 1 C 12 hydrocarbon group, ranging from 0.1 up to 500g per g of said solid catalyst component, said (co)polymer being characterized by an isotacticity, expressed in terms isotactic pentads, of higher than 60% molar and by an intrinsic viscosity, measured in tetraline at 135°C, of at least 1.0 dL/g.
Abstract:
The present invention relates to catalysts component for the polymerization of ethylene and its mixtures with olefins CH 2 =CHR, wherein R is an alkyl, cycloalkyl or aryl radical having 1-12 carbon atoms, comprising Ti, Mg, halogen, and electron donor belonging to 1,2-diethers as internal electron donor compound. The catalyst of the invention is suitably used in (co)polymerization processes of ethylene to prepare (co)polymers having narrow Molecular Weight Distribution (MWD) and high bulk density.
Abstract:
A thermo-catalytic process for the depolymerizing waste plastic material and producing a pyrolytic oil comprising two agitated vessel depolymerization reactors and two condensing sections is disclosed. The setup also comprises a char handling section. The process is endowed with high efficiency and versatility and can produce a pyrolytic product in the form of oil for various end-uses.
Abstract:
Catalytic compositions for depolymerizing polyolefin-based waste material into useful petrochemical products and methods of use are described. The compositions are a composite of at least one zeolite catalyst with one or more co-catalyst(s) that is a solid inorganic material. These composite catalysts, along with heat, are used to both increase the depolymerization reaction rate of the feed streams and suppress poisoning effects of non-polyolefin polymers that may be present. This results in a shorter residence time in the depolymerization unit and more efficient process.
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 process for the preparation of a solid catalyst component for the (co)polymerization of CH 2 =CHR olefins, in which R is hydrogen or hydrocarbyl radical with 1-12 carbon atoms, comprising a Ti compound and optionally an electron donor on a Mg chloride based support, said process comprising one or more steps (a) carried out at a temperature ranging from 0 to 150°C in which a Mg based compound of formula (MgCl m X 2-m )•nLB, in which m ranges from 0 to 2, n ranges from 0 to 6, X is, independently R 1 , OR 1 , -OCOR 1 or O-C(O)-OR 1 group, in which R 1 is a C 1 -C 20 hydrocarbon group, and LB is a Lewis base, is reacted with a liquid medium comprising a Ti compound, having at least a Ti-Cl bond, in an amount such that the Ti/Mg molar ratio is greater than 3 and at least one step (b) in which the solid particles coming from (a) are suspended in a liquid medium comprising hydrocarbons at a temperature ranging from 10 to 100°C, said process being characterized by the fact that at least one of said steps (a) and/or (b) is carried out in the presence of 0.2 to 20.0% by weight, with respect to the amount of Mg compound, of particles of a solid compound containing more than 50% by weight of SiO 2 units, is disclosed.
Abstract:
A Prepolymerized catalyst component for the polymerization of olefins comprising a solid catalyst component which comprises Mg, Ti, and chlorine atoms and an electron donor (ID) said prepolymerized catalyst component being characterized by the fact that: - the electron donor (ID) is constituted by at least 80%mol of 1,3 diethers with respect to the total molar amount of electron donor compounds; -the prepolymerized catalyst has a porosity due to pores with diameters up to Ιμιη of less than 0.2 cm3/g; -it contains an amount of ethylene prepolymer of less than 45% with respect to the total weight of prepolymerized catalyst.