Abstract: Houdry lumps can be reduced by controlling the reactors in a fixed bed dehydrogenation process for producing olefins according to defined rules. A programmable logic controller can apply the rules to the operation of the dehydrogenation unit and control the operation of individual reactors according to the rules. By doing so, the performance of dehydrogenation units can be improved without adding any heat generating inerts, such as CuO-? alumina For example, the dehydrogenation units can be operated according to combinatorics in the programmable logic controller such that the farthest two reactors in the dehydrogenation unit never operate in parallel in the dehydrogenation or air regeneration steps.

Abstract: A thermoplastic multilayer article comprises: a polycarbonate substrate comprising a polycarbonate composition comprising at least one of a polycarbonate homopolymer, a copolycarbonate, or a polycarbonate copolymer, the polycarbonate substrate having a first surface and an opposing second surface; and a first polyurethane layer laminated or coextruded on at least a portion of the first surface of the polycarbonate substrate, the first polyurethane layer comprising a first aliphatic thermoplastic polyurethane and a polyurethane UV stabilizer, wherein the first aliphatic thermoplastic polyurethane comprises first segments formed via a reaction of caprolactone and an aliphatic isocyanate, and second segments formed via a reaction of a chain extender and the aliphatic isocyanate.

Abstract: Systems and methods for producing an alkyl tert-butyl ether are disclosed. The methods include providing heat to a reboiler of a distillation column of an alkyl tert-butyl ether production unit from a flue gas emanating from a unit carrying out a catalyst regeneration process.

Abstract: In an embodiment, a reactor for carrying out a melt transesterification reaction at a reactor temperature of 160 to 300° C. and a reactor pressure of 5 to 200 mbar, comprises a cylindrical tank comprising a top, a side, and a bottom, wherein the bottom is convex, extending away from the top; a stirring shaft disposed within the cylindrical tank along an axis thereof so that it is rotatable from outside of the cylindrical tank; an impeller extending from the stirring shaft in the cylindrical tank and comprising a plurality of blades; a reactant solution inlet; a reaction solution outlet; and an externally located heat exchanger in fluid communication with the cylindrical tank via a recirculation stream and a heated stream. The reactor can be used for the polymerization of a polycarbonate oligomer.

Abstract: Systems and methods for processing full range naphtha feeds to produce a light olefins stream and an aromatics stream are described. In particular, the invention concerns integration of catalytic cracking with steam cracking to maximize production of aromatics.

Abstract: Embodiments of the invention are directed to methods, processes, and systems for safely and reliably purifying hydrogen from a gas mixture containing hydrogen and oxygen.

Abstract: Systems and processes for producing olefins and aromatics. A process can include contacting a first hydrocarbon feed with a catalyst and a hydrogen source under conditions sufficient to produce a used catalyst and an intermediate stream containing olefins and aromatics, and contacting the used catalyst with the intermediate stream and a coke precursor feed to produce a spent coked catalyst and a products stream comprising additional olefins and aromatics.

Abstract: A process for producing isooctane by introducing a butane feed stream (containing n-butane, i-butane) and hydrogen into a catalytic hydrogenolysis reactor to produce a hydrogenolysis product stream; separating the hydrogenolysis product stream into a butane stream (i-butane, optionally n-butane); feeding the butane stream to a catalytic dehydrogenation reactor to produce a dehydrogenation product stream comprising saturated and unsaturated four-carbon hydrocarbons; and feeding the dehydrogenation product stream to an oligomerization unit to produce isooctene and dehydrogenating the isooctene to produce isooctane.

Abstract: A system and a method for producing ethylene glycol are disclosed. Alkylene oxide and water are flowed into a first reactor unit and subjecting the alkylene oxide and water, in the first reactor unit, to first reaction conditions such that an effluent of the first reactor unit comprises an alkylene glycol, unreacted alkylene oxide, and unreacted water. At least a portion of the unreacted alkylene oxide may be routed to a second reaction unit and subjected to reaction conditions sufficient to produce additional alkylene glycol, wherein the second reactor unit is a reactive distillation column.

Abstract: A method for reducing fouling in an aqueous system of an olefin production plant is disclosed. The method includes adding an effective amount of a surfmer to the aqueous system, wherein the surfmer forms a water soluble adduct by covalently bonding to one or more fouling precursor compounds formed during olefin production.

Abstract: A plastic glazing of a tailgate of a vehicle is provided, the plastic glazing comprising a translucent component, wherein a portion of the translucent component forms a rear window of the vehicle, a colored component molded onto the translucent component in a second shot, wherein the colored component comprises a lens of a light unit, a non-transparent component molded onto the translucent component, wherein an overlapping portion of the translucent component and the non-transparent component forms a blackout region proximate to the rear window, wherein the plastic glazing is of one-piece molded plastic construction, wherein the translucent component comprises a first textured surface in a region adjacent to the blackout region, where the first textured surface is configured to conceal a component of the vehicle.

Abstract: A composition includes specific amounts of a reinforcing filler and a copolycarbonate containing bisphenol A carbonate units and second carbonate units of the formula wherein Ra, Rb, R3, R4, j, p, and q are defined herein. The composition is useful for fabricating articles that exhibit a desirable balance of heat resistance, printability in large format additive manufacturing, and good surface appearance in printed parts. Also described is a method of additive manufacturing utilizing the composition.

Abstract: A method of optimizing a design parameter for an adsorption column includes developing a first kinetic model and a Linear Driving Force model for a chromatography and ion exchange based adsorption process. Both analytical solutions to the first kinetic model and the Linear Driving Force model are then used to determine an optimal range of the design parameter.

Abstract: Systems and methods for producing olefins and/or aromatics are disclosed. Methods disclosed includes thermal hydro-processing of crude oils and/or heavy oils and/or residues, in a thermal hydro-processing unit, to produce intermediate products, which can then be used to make valuable chemicals such as olefins and aromatics.

Abstract: A pyrolysis reactor (12) and method for the pyrolysis of hydrocarbon gases (e.g., methane) utilizes a pyrolysis reactor (12) having a unique burner assembly (44) and pyrolysis feed assembly (56) that creates an inwardly spiraling fluid flow pattern of the feed gases to form a swirling gas mixture that passes through a burner conduit (46) with a constricted neck portion or nozzle (52). At least a portion of the swirling gas mixture forms a thin, annular mixed gas flow layer immediately adjacent to the burner conduit (46). A portion of the swirling gas mixture is combusted as the swirling gas mixture passes through the burner conduit (46) and a portion of combustion products circulates in the burner assembly (44). This provides conditions suitable for pyrolysis of hydrocarbons or light alkane gas, such as methane or natural gas.

Abstract: A viewing panel (30, 40, 50, 60, 70, 80) for a domestic appliance includes a substrate (33, 43, 53, 63, 73, 83) and a conductive layer (35, 45, 55, 65, 75, 85) disposed on the substrate; the conductive layer having conductive lines (31, 41, 51, 61, 71, 81) forming a pattern. The substrate contains a polymeric material; the conductive lines have a height (H) of 0.5 micrometers to 10 micrometers determined by an Olympus MX61 microscope; and the pattern has an average pore area of 0.008 square millimeters to 0.06 square millimeters determined by an Olympus MX61 microscope. The viewing panel has: a total transmission of greater than 70% of light having a wavelength in the range of 360 nanometers to 750 nanometers; and an electromagnetic shielding efficiency of greater than 30 dB at 2.45 GHz.

Abstract: A method of producing methanol is disclosed. The method involves adding alkali to crude methanol and distilling the crude methanol in one or more distillation columns. The method also includes flowing a vapor side draw from one of the distillation columns, where the vapor side draw comprises fusel oil substantially free from alkali. The fusel oil is recycled to a methanol synthesis reactor and/or a MTBE synthesis reactor.

Abstract: A pipe- or tube-shaped article having an innermost layer, wherein the innermost layer has a thickness of 0.001 to 100 mm and comprises a polyolefin composition comprising a) a propylene-ethylene copolymer, wherein the amount of repeat units derived from ethylene is 1 to 20 wt % based on the weight of the propylene-ethylene copolymer and wherein the propylene-ethylene copolymer has a density of at most 0.9 g/cm3 as determined by ASTM D1505 and b) an olefin polymer selected from high-density polyethylene (HDPE), linear low density polyethylene (LLDPE), polypropylene (PP) and combinations thereof.

Abstract: Fertilizer particles containing a core and a shell is described. The core can contain urea, a pH buffering agent, and an urease inhibitor, and the shell can contain urea and can cover at least a portion of an outer surface of the core. The core can include 20 wt. % to 80 wt. % urea, based on the total weight of the core, and the shell can include 50 wt. % to 100 wt. % urea, based on the total weight of the core.

Abstract: Systems and methods for the catalytic cracking of light hydrocarbons, such as naphtha, to form light olefins and aromatics is disclosed. The systems and methods may include a catalytic cracking process that involves mixing catalyst with a gas and then this mixture is used to contact a hydrocarbon feed, e.g., light straight run naphtha or heavy straight run naphtha. The hydrocarbon feed may be mixed with dry gas such as methane and/or hydrogen to dilute the hydrocarbon feed, before the hydrocarbon feed is contacted with the catalyst/gas mixture.