Abstract:
A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins, said catalyst component containing magnesium, titanium, and halogen, and further containing an internal electron donor having a structure: [R 1 -O-C(O)-O-] x R 2 wherein R 1 is independently at each occurrence, an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms; x is 2-4; and R 2 is an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms, provided that there are 2 atoms in the shortest chain connecting a first R 1 O C(O)-O- group and a second R 1 -O-C(O)-O- group.
Abstract translation:用于聚合烯烃的固体,不溶于烃的催化剂组分,所述催化剂组分含有镁,钛和卤素,并且还含有具有以下结构的内部电子给体:[R 1 -OC(O)-O-] x R 2,其中R 1 在每次出现时独立地为脂族或芳族烃,或含有1至20个碳原子的取代烃基; x为2-4; 并且R2是含有1至20个碳原子的脂族或芳族烃或取代的烃基,条件是在连接第一个R1 OC(O)-O-基团和第二个R1-OC( O)-O-基。
Abstract:
Catalyst component comprising Mg, Ti, Hf, a halogen and, optionally, -OR groups where R is a C1-C20 hydrocarbon group, characterized in that (a) the Mg atoms are present in an amount higher than 7% based on the total weight of the said catalyst component, (b) the amount of Mg, Ti, and Hf atoms is such that the Mg/Ti molar ratio ranges from (3) to (25) and the Hf/Ti molar ratio is lower than 1.5 and (c) when -OR groups are present their amount is such that the -OR/Ti molar ratio is lower than (2).
Abstract:
Methods for rejuvenation of supported metallic catalysts comprised of a Group VIII metal, a Group VIB metal, making use of these metals, an organic complexing agent, and optionally an organic additive, are provided. The rejuvenation includes stripping and regeneration of a spent or partially spent catalyst, followed by impregnation with metals and at least one organic compound. The impregnated, regenerated catalysts are dried, calcined, and sulfided. The catalysts are used for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.
Abstract:
Disclosed are catalyst systems and methods of making the catalyst systems/supports for the polymerization of an olefin containing a solid titanium catalyst component having a substantially spherical shape and containing an internal electron donor, a support made by contacting substantially equal molar amounts of a magnesium compound and an epoxy compound in the presence of an aprotic solvent and subsequent treatment with a halogenating agent to provide a magnesium based catalyst support. The catalyst system can further contain an organoaluminum compound and an organosilicon compound. Also disclosed are methods of polymerizing or copolymerizing an alpha-olefin. The methods involve contacting an olefin with a catalyst system containing the solid titanium catalyst component.
Abstract:
The invention relates to a catalyst for hydroconversion of hydrocarbons, comprising a support made from at least one refractory oxide, at least one group VIII metal and at least one group VIB metal, characterised in further comprising at least one organic compound with at least two thiol functions separated by at least one oxygenated group of formula (I) : HS-CxHyOz-SH (I), where x =1 to 20, preferably 2 to 9 and for example x = 6, y = 2 to 60, preferably 4 to 12 and z = 1 to 10, preferably 1 to 6. The invention further relates to a method for preparation, a method for activation of said catalyst and use of the catalyst for the hydrotreatment and/or hydrocracking of hydrocarbons.
Abstract:
Supported metallic catalysts comprised of a Group VIII metal, a Group VIB metal, and an organic additive, and methods for synthesizing supported metallic catalysts are provided. The catalysts are prepared by a method wherein precursors of both metals are mixed and interacted with at least one organic additive, dried, calcined, and sulfided. The catalysts are used for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.
Abstract:
Use of ionic liquids as solvents in base-catalysed chemical reactions wherein the ionic liquid is composed of at least one species of cation and at least one species of anion, characterised in that a cation of the ionic liquid comprises a positively charge moiety and a basic moiety, and further wherein such ionic liquids may be used as promoters or catalysts for the chemical reactions.
Abstract:
The invention relates to a porous inorganic oxide carrier supporting thereon an oxygen-containing carbonaceous substance, preferably a carbide of an oxygen-containing organic compound, wherein the mass ratio of carbon supported on the carrier for catalyst preparation to the carrier is 0.05 to 0.2, the atomic ratio of hydrogen supported on the carrier to carbon supported thereon is 0.4 to 1.0, and the atomic ratio of oxygen supported on the carrier to carbon supported thereon is 0.1 to 0.6. The invention relates also to a hydrotreating catalyst for catalytically cracked gasoline which is produced by making a catalyst containing a Group 8 metal of the periodic table, molybdenum (Mo), phosphorus, and sulfur supported on the above carrier. This catalyst depresses the hydrogenation of olefins even under the reaction conditions attaining high-degree desulfurization and minimizes the lowering in the octane value, thus being useful as a catalyst for hydrodesulfurizing catalytically cracked gasoline or the like to a super depth desulfurization level.
Abstract:
Use of ionic liquids as solvents in base-catalysed chemical reactions wherein the ionic liquid is composed of at least one species of cation and at least one species of anion, characterised in that a cation of the ionic liquid comprises a positively charge moiety and a basic moiety, and further wherein such ionic liquids may be used as promoters or catalysts for the chemical reactions.
Abstract:
An impregnant solution for hydrocarbon hydrodesulfurization catalysts which comprises at least one Group 6 metal of the Periodic Table, at least one Group 8 metal of the Periodic Table, and/or a phosphorus compound, and a sugar derivative; and a catalyst for the hydrodesulfurization of hydrocarbons which is obtained by impregnating a support with the impregnant solution and then drying the impregnation. The impregnant solution is stable over a wide pH range. The hydrodesulfurization catalyst has excellent hydrodesulfurization performance, especially in the desulfurization of compounds difficult to desulfurize. It is inhibited from functioning to hydrogenate unsaturated hydrocarbons and does not cause the isomerization/decomposition attributable to the function of solid acids. The catalyst is hence extremely useful as a catalyst for the superdeep hydrodesulfurization of gas-oil fractions, etc.