Abstract:
The present disclosure provides films made of polyethylene (PE) compositions. In at least one embodiment, a film includes a polyethylene having at least 50 wt% ethylene derived units and from 0 to 50 wt% of C 3 -C 40 olefin comonomer content, based upon the total weight of the polyethylene composition. The polyethylene composition may have a melt temperature of from 250°C to 600°C. The film may an average of the MD and TD 1% secant moduli of 30,000 psi or greater, and a Dart Drop Impact of from 100 g/mil to 500 g/mil. In at least one embodiment, the present disclosure provides for processes to make a film.
Abstract:
Method and device 41 for processing one or more polzmers placed in a screen changer or plate member 40. The secondary member 45 is shown having a substantially conical depression and the substantially conical depression tapers away from the hollow section of the elongated body. Appropriate housing 49 is provided for the device 41 and the secondary member 45 to promote the flow of polymer beginning at the inlet flow zone 39. The plurality of holes 43 may be observed and are placed through-out the elongated body (not labeled). The device may also have a means 47 for securing itself to the plate member or screen changer 40, for example, using bolting.
Abstract:
Systems and processes for rapidly depressurizing a reactor system are disclosed. The systems and processes are particularly useful in the high pressure polymerization of ethylene.
Abstract:
An ethylene-based polymer comprising about 80.0 to 99.0 wt.% of polymer units derived from ethylene and about 1.0 to about 20.0 wt.% of polymer units derived from one or more C 3 to C 20 α-olefin comonomers; the ethylene-based polymer having: a CDBI of 60% to 80%; a melt index, I 2.16 , of about 4.0 to about 12.0 g/10 min.; a high-load melt index, I 21.6 , of 80.0 to about 160.0 g/10 min.; a melt index ratio ( I 21.6 / I 2.16 ) of 9.0 to 40.0; and a density of from about 0.910 to about 0.930 g/cm 3 . Articles, such as films, particularly suitable for use in pre-stretch applications, produced from such polymers and methods of making such articles are also provided.
Abstract:
Films including a Layer A comprising 50.0 to 100.0 wt. %, based on the weight of the Layer A, of an ethylene-based polymer composition having therein a hafnium : zirconium (ppm/ppm) ratio > 1.0, a CDBI less than 50%, and a g' vis ≥ 0.98; wherein the Layer A is substantially free of polyethylene having 0.50 ≤g' vis ≤ 0.85 are described. Particular films are suitable as cast films for TD shrink and draw tape bag applications.
Abstract:
Processes for the production of compositions including esters and their hydrogenated derivatives are provided. The esters and the hydrogenated derivatives may be produced with among other things alcohols that are derived from biological sources such as photosynthetic microorganisms. The esters and/or the hydrogenated derivatives may be employed as plasticizers for polymeric compositions.
Abstract:
Embodiments disclosed herein generally relate to olefin polymerization catalysts, and more specifically to chromium-based catalysts and methods of use of chromium-based catalysts for the production of polyolefins, and even more specifically to methods for controlling or tailoring the flow index response of chromium-based catalysts through the controlled addition of a reducing agent to the catalysts under controlled mixing conditions.
Abstract:
A method of performing a polymerization reaction in a gas phase polymerization reactor to produce a bimodal polymer while controlling activity of a bimodal polymerization catalyst composition in the reactor by controlling concentration of at least one induced condensing agent ('ICA') in the reactor is provided. In some embodiments, the ICA is isopentane (or another hydrocarbon compound) and the bimodal catalyst composition includes a Group 15 and metal containing catalyst compound (or other HMW catalyst for catalyzing polymerization of a high molecular weight fraction of the product), and a metallocene catalyst compound (or other LMW catalyst for catalyzing polymerization of a low molecular weight fraction of the product).
Abstract:
Offshore systems and methods may be configured for oil production, offshore power generation, ammonia production, and carbon dioxide injection for EOR. For example, a method performed on an offshore facility may include: separating a produced hydrocarbon into a produced gas and a produced oil; combusting the produced gas to produce power and a flue gas; at least partially removing nitrogen from the flue gas to produce a carbon dioxide-enriched flue gas and a nitrogen-enriched flue gas; reforming a portion of the produced gas to produce a stream including hydrogen and carbon dioxide; at least partially separating the carbon dioxide from the stream to yield a carbon dioxide stream and a hydrogen stream; reacting the hydrogen stream and the nitrogen-enriched flue gas to yield ammonia; combining and compressing the carbon dioxide stream and the carbon dioxide-enriched flue gas; and injecting the compressed gas from the gas compressor into the gas reservoir.