Abstract:
Methods for generating a purified catalyst are provided. The method includes performing a reaction in a reaction vessel to generate a liquid catalyst and reaction products, purging the reaction products using an inert gas to form a purged catalyst, freezing the purged catalyst in the reaction vessel, and applying a vacuum to the reaction vessel while the purged catalyst thaws, wherein the vacuum removes residual reaction products to form a purified catalyst. Systems for generating a purified catalyst and a purified catalyst are also provided.
Abstract:
Catalyst composition for the oligomerization of ethylene, comprising (i) an at least partially hydrolyzed transition metal compound, obtainable by controlled addition of water to a transition metal compound having the general formula MX m (OR') 4-m or MX m (OOCR') 4-m , wherein R' is an alkyl, alkenyl, aryl, aralkyl or cycloalkyl group, X is halogen, preferably Cl or Br, and m is from 0 to 4; preferably 0-3; and (ii) an organoaluminum compound as a cocatalyst, wherein the molar ratio of water and transition metal compound is within a range of between about (0.01-3): 1; a process for oligomerization of ethylene and a method for preparing the catalyst composition.
Abstract:
The present invention relates to a method for preparing linear alpha-olefins (LAO) by oligomerization of ethylene in the presence of a solvent and homogeneous catalyst, comprising the steps of: (i) feeding ethylene, solvent and catalyst into an oligomerization reactor, (ii) oligomerizing the ethylene in the reactor, (iii) removing a reactor outlet stream comprising solvent, linear alpha-olefins, optionally unreacted ethylene and catalyst from the reactor via a reactor outlet piping system, (iv) dosing at least one additive selected from the group consisting of alcohols, polyethylene glycols, polyethylene glycol monoethers, polyethylene glycol diethers, polyamines, amines, amino alcohols and surfactants, (v) transferring the reactor outlet stream containing the additive to a catalyst deactivation and removal section, and (vi) deactivating the catalyst with caustic and removing the deactivated catalyst from the reactor outlet stream, wherein the residence time of the additive in the reactor outlet stream prior to mixing with caustic is at least 1 second preferably at least 5 seconds, more preferably at least 10 seconds.
Abstract:
The present invention relates to a catalyst for oligomerization of ethylene, comprising a functionalized solid support; a ligand immobilized on the solid support by chemical bonding, wherein the immobilized ligand has, the structure (R 1 )(R 2 )P-N(R 3 )-P(R 4 )-Y-support or (R 1 )(R 2 )P-N(R 3 )-P(R 4 )-N(R 5 )-P(R 6 )-Y-support, wherein R 1 R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from aliphatic group, aryl group, amino group and trimethylsilyl group and Y is the functional group of the support or a derivative thereof; and a chromium compound reacted with the ligand.; and to a method for its preparation and a process for oligomerization of ethylene utilizing the catalyst.
Abstract:
The present disclosure relates to a catalyst composition having a high selectivity converting methane to an aromatic compound. The disclosed catalyst composition comprises an inorganic support; a molybdenum; and at least one promoter selected from copper, iron, silver, zinc, calcium, cobalt, nickel, platinum, lanthanum, and cerium; wherein the total amount of the promoter is present in an amount that ranges from greater than 0.01 wt. % to 0 wt.%, based on the total weight of the catalyst composition; wherein when the at least one promoter is zinc, the molybdenum is not in the form of molybdenum oxalate; and wherein the catalyst composition converts methane to an aromatic compound. Also disclosed is a method for preparing the catalyst composition and a method of using the same to produce an aromatic compound.
Abstract:
The present disclosure relates to a catalyst composition having a high selectivity converting methane to an aromatic compound. The disclosed catalyst composition comprises an inorganic support; molybdenum; and at least two promoters selected from copper, iron, silver, zinc, calcium, cobalt, nickel, platinum, lanthanum, and cerium. Also disclosed is a method for preparing the catalyst composition and a method of using the same to produce an aromatic compound.
Abstract:
The present invention relates to a catalyst composition for oligomerization of ethylene, com¬ prising a chromium compound; a ligand of the general structure R 1 R 2 P-N(R 3 )-P(R 4 )-N(R 5 )-H, wherein R 1 , R 2 , R 3 , R 4 and R 5 are independently selected from halogen, amino, trimethylsilyl, C 1 -C 10 -alkyl, aryl and substituted aryl; a modifier containing organic or inorganic halide; and an activator or co-catalyst; and a process for oligomerization utilizing that catalyst.
Abstract:
The present invention relates to a method for the oligomerisation of ethylene, comprising the steps of: (i) oligomerising ethylene in a reactor in the presence of a solvent and a catalyst composition; (ii) discharging a catalyst composition containing outlet stream from the reactor; (iii) deactivating and extracting the catalyst composition with a polar phase, wherein the outlet stream and the polar phase are mixed in a dynamic mixing device having rotor and stator elements comprising concentric tool rings as well as to a reactor system therefore.
Abstract:
The invention pertains to a zeolite catalyst, methods of making same, and its use in the catalytic cracking of naphtha for the production of lower molecular weight olefins and alkanes, while minimizing production less desirable products. A zeolite is modified by base leaching and by the addition of a metal cation, thereby lowering the Si/Al 2 ratio and improving the stability of the formed catalyst.
Abstract translation:本发明涉及一种沸石催化剂,其制备方法,以及其在用于生产低分子量烯烃和烷烃的石脑油的催化裂化中的用途,同时使生产不太理想的产物最小化。 通过碱浸出和金属阳离子改性沸石,从而降低Si / Al 2比例并提高形成的催化剂的稳定性。
Abstract:
The inventions described herein relate to catalysts comprising a zeolite comprising at least one metal or ion thereof, wherein the at least one metal or ion thereof comprises barium, strontium, titanium, tungsten, or a mixture thereof, and wherein the zeolite does not comprise molybdenum, or phosphorus, and methods related thereto.