Abstract: A process of purifying downstream methanol-to-olefin streams comprising separating a downstream methanol-to-olefin stream comprising one or more light and heavy components in a first column into a light component stream and a heavy component stream, purifying a light component stream with a first dividing wall distillation column thereby producing an ethylene fraction and distilling the heavy component stream thereby forming a propylene fraction.

Abstract: Provided is a process for the polymerization of ethylene comprising introducing ethylene, a liquid light hydrocarbon diluent, at least one catalyst, at least one cocatalyst, and optionally one or more comonomers into a reactor; polymerizing the ethylene and optionally the one or more comonomers in the reactor to produce an ethylene polymer; wherein the reactor is fluidly connected to a cooling system, the cooling system comprising a slurry-free heat exchanger, and the cooling system is configured to receive a vapor stream comprising light hydrocarbon vapor produced in the reactor. Also provided is an ethylene polymer produced from the process for polymerizing ethylene and a system for producing an ethylene polymer.

Abstract: Polymer compositions may comprise propylene, present in a range of 80 to 95 wt % of the polymer composition, and two comonomers selected from a group comprising ethylene and C4-C10 alpha olefins, wherein the polymer composition has a total content of the comonomers in the range of 5 to 20 wt % of the polymer composition. Cap liners may be formed from the polymer compositions. Caps may comprise a closure formed from polypropylene and a polypropylene-based cap liner that lines at least a portion of the closure.

Abstract: A process for preliminary polymerization may include washing a catalyst mud comprising a supported metallocene catalyst with at least one saturated hydrocarbon at a temperature from 0° C. to 40° C., a pressure from 20 to 40 kgf/cm2, and a residence time of at least 30 minutes; continuously feeding the washed catalytic mud to a continuous pre-polymerization reactor; and pre-polymerizing, in the continuous pre-polymerization reactor, ethylene and at least one C4 to C10 ?-olefin as comonomer, with the washed catalytic mud, to produce a pre-polymer; wherein an average residence time in the continuous pre-polymerization reactor is more than 90 minutes and less than 240 minutes, a reactor temperature is from 10° C. to 50° C., and a reactor pressure from 20 to 40 kgf/cm2.

Abstract: A method of controlling long chain branching in an ethylene-based polymer includes polymerizing ethylene with one or more optional monomers to form an ethylene-based polymer, and controlling a degree of long chain branching (LCB) in the ethylene-based polymer. The degree of LCB ranges from 0.1 per 1000 carbon atoms in the polymer backbone to 10 per 1000 carbon atoms in the polymer backbone, as measured by 13CNMR. The degree of LCB is controlled by adding one or more branched vinyl ester to the polymerizing step in an amount ranging from 0.01 mol % to 5.0 mol %, relative to total monomer content. A polymer composition contains the ethylene-based polymer. An article includes the polymer composition containing the ethylene-based polymer.

Abstract: A polymer blend composition may include from 0.01 to 99.99 wt % of a thermoplastic resin matrix; and from 0.01 to 99.99 wt % of a dynamically crosslinked polymer. A thermoplastic vulcanizate composition may include from 0.01 to 99.99 phr of a thermoplastic resin; from 0.01 to 99.99 phr of a dynamically crosslinked polymer; from 0 to 150 phr of plasticizer; and from 0 to 600 phr of at least one filler.

Abstract: The present application provides a method and a system for recycling a polymer. The method includes introducing polymer into a primary melting extruder, producing a polymer melt that is combined with a fluid oil to at least partially dissolve the polymer melt. A secondary mixing extruder mixes these to form a polymer solution that is introduced into a refinery oil stream, producing a polymer-comprising oil stream, which is fed into a refinery process unit. The system includes a primary melting extruder for forming a polymer melt from polymer. A secondary mixing extruder receives the polymer melt. One or more hydrocarbon inflow conduits for providing a fluid oil to the primary melting extruder and/or the secondary mixing extruder are configured to form a polymer solution from the fluid oil and the polymer melt. There is a feed system outlet for feeding the polymer solution to a refinery oil stream.

Abstract: A polymer composition may include an elastomeric ethylene-vinyl acetate, in which at least a portion of ethylene from the elastomeric ethylene-vinyl acetate is obtained from a renewable source of carbon. A curable polymer composition, an expandable polymer composition, articles, cured articles, and expanded articles may include or be formed from such polymer composition. A process for producing a polymer composition may include polymerizing ethylene at least partially obtained from a renewable source of carbon with vinyl acetate to produce an ethylene vinyl acetate copolymer; and mixing the ethylene-vinyl acetate copolymer with an elastomeric polyolefin to produce an elastomeric ethylene-vinyl acetate.

Abstract: A railroad sleeper for fixation of at least one pair of rails of a railroad network, the railroad sleeper may include a contact surface, wherein each rail of the pair of rails is fixed thereto spaced apart from each other; anchorage walls extending downward from the contact surface, and having a support point at a bottom surface thereof, the anchorage walls having at least one aperture formed therein; and a void delimited by the contact surface and anchorage walls.

Abstract: A method for producing a low viscosity polyethylene-based composition comprising melting a polyethylene-based composition; decreasing a viscosity of the polyethylene-based composition; and optionally, repeating the melting and the viscosity decreasing steps to form a low viscosity polyethylene-based composition; wherein the melting and viscosity decreasing steps are performed in a continuous process at temperature that is equal to or greater than 350° C., residence time of less than 2 min and the polyethylene-based composition is in the presence of at least one free radical generator.

Abstract: Polymer compositions may include an elastomeric ethylene-vinyl acetate (EVA) composition; and one or more selected from base polymer, filler, peroxide agent, blowing agent, and blowing accelerator. Methods may include blending a polymer composition from a mixture of an elastomeric ethylene-vinyl acetate (EVA) composition, and one or more of base polymer, filler, peroxide agent, blowing agent, and blowing accelerator, wherein the elastomeric EVA composition has a melt flow index (MFI) at 190° C. and 2.16 kg as determined according to ASTM D1238 in the range of 6.1 g/10 min and 45 g/10 min.

Abstract: An impact copolymer polypropylene composition may include a polypropylene-based matrix polymer; and from 25 to 45 wt % of an ethylene-propylene copolymer rubber (EPR) phase, based on the total weight of the composition, wherein the EPR phase comprises 30 to 38 wt % ethylene and a xylene solubles (XS) content ranging from 25 to 45 wt % as determined by acetone precipitation, and wherein the ICP composition has an Izod impact strength ranging from 180 to 600 J/m, as measured according to ASTM D256A at ?20° C.

Abstract: The present disclosure relates to biological processes and systems for the production of isopropanol and/or acetone utilizing modified alcohol dehydrogenases that exhibit increased activity with NADH as a cofactor. The disclosure further relates to polynucleotides and polypeptides of the modified alcohol dehydrogenases, and host cells containing the polynucleotides and expressing the polypeptides.

Abstract: A polyethylene-based resin composition for injection stretch blow-molding including a co-crystallized blend of a high density polyethylene (HDPE) base resin and a linear low density polyethylene (LLDPE). A method of producing a polyethylene-based resin composition includes adding the LLDPE to the HDPE base resin at a molten state to provide a blend of HDPE and LLDPE, wherein at the molten state, the LLDPE is fully miscible with the HDPE base resin and co-crystallizing the blend of HDPE and LLDPE.

Abstract: Described is a fluidic seal apparatus for continuously injecting a sealing gas into a bottom section of a gas-solids separation chamber. The fluidic seal apparatus includes an external section, a feed tube in fluid communication with a sealing gas supply, and an internal section. The external section connects the sealing gas supply to the internal section. The internal section includes gas distribution nozzles for distributing the sealing gas inside the bottom section of the gas-solids separation chamber. An internal chamber between the internal section and the external section is pressurized by the sealing gas.

Abstract: The present disclosure provides a copolyester including a dicarboxylic acid component A comprising a terephthalic acid residue or ester-forming derivative thereof, or a mixture thereof, and a 2,4-furandicarboxylic acid residue or ester-forming derivative thereof, or a mixture thereof, and a diol component B comprising an alkanediol residue having from 2 to 22 carbon atoms, wherein the dicarboxylic acid component A has a total molar content, and wherein the 2,4-furandicarboxylic acid residue or ester-forming derivative thereof, is present in an amount of from 0.1 to 10 mol %, with respect to the total molar content of the dicarboxylic acid component A. Inventive copolyesters have a slower crystallization rate, a higher gas barrier to CO2 and O2 and a higher ratio of 14C to 12C as measured by ASTM D6866 when compared to a comparable copolyester comprising isophthalic acid instead of 2,4-furandicarboxylic acid.

Abstract: The present disclosure provides recombinant microorganisms and methods for the production of 4-HMF, 2,4-furandimethanol, furan-2,4-dicarbaldehyde, 4-(hydroxymethyl)furoic acid, 2-formylfuran-4-carboxylate, 4-formylfuran-2-carboxylate, and/or 2,4-FDCA from a carbon source. The method provides for engineered microorganisms that express endogenous and/or exogenous nucleic acid molecules that catalyze the conversion of a carbon source into 4-HMF, 2,4-furandimethanol, furan-2,4-dicarbaldehyde, 4-(hydroxymethyl)furoic acid, 2-formylfuran-4-carboxylate, 4-formylfuran-2-carboxylate, and/or 2,4-FDCA. The disclosure further provides methods of producing polymers derived from 4-HMF, 2,4-furandimethanol, furan-2,4-dicarbaldehyde, 4-(hydroxymethyl)furoic acid, 2-formylfuran-4-carboxylate, 4-formylfuran-2-carboxylate, and/or 2,4-FDCA.

Abstract: The present application relates to recombinant microorganisms useful in the biosynthesis of monoethylene glycol (MEG), or optionally MEG and one or more co-product, from one or more hexose feedstock. The present application also relates to recombinant microorganisms useful in the biosynthesis of glycolic acid (GA), or optionally GA and one or more co-product, from one or more hexose feedstock. The present application relates to recombinant microorganisms useful in the biosynthesis of xylitol, or optionally xylitol and one or more co-product, from one or more hexose feedstock. Also provided are methods of producing MEG (or GA or xylitol), or optionally MEG (or GA or xylitol) and one or more co-product, from one or more hexose feedstock using the recombinant microorganisms, as well as compositions comprising the recombinant microorganisms and/or the products MEG (or GA or xylitol), or optionally MEG (or GA or xylitol) and one or more co-product.

Abstract: A method of forming a light-polyisobutylene may include polymerizing isobutene or an isobutene-containing monomer mixture in presence of a proton-form zeolite catalyst to form a light-polyisobutylene. A light-polyisobutylene may be formed by the method of polymerizing isobutene or an isobutene-containing monomer mixture in presence of a proton-form zeolite catalyst.

Abstract: A blow molded article may include at least one layer comprising a blended ethylene-based polymer composition, the blended ethylene-based having a PCR content varying from greater than 10 wt % to less than 95 wt % and a virgin resin content varying from greater than 5 to less than 90 wt %, wherein the virgin resin is selected from HOPE, LLDPE, LDPE, EVA, or combinations thereof, wherein the PCR and virgin content are selected so that the blended ethylene-based polymer composition has an Izod impact strength at 23° C., as measured according to ASTM D 256, of at least 50 J/m, and/or a flexural modulus at 1% secant, as measured according to ASTM D 790, ranging from about 800 to 1700 MPa.