Abstract:
A system is disclosed for producing ultra-high-molecular-weight (UHMW) poly-alpha-olefins (PAO) for use as pipeline drag reducing agents, having improved thermal efficiency and reduced branching of the PAO. The system comprises hinged pairs of shells, each pair of shells comprising a grid of larger hemispherical voids connected by smaller hemicylindrical passages, arranged in a serpentine pattern along the surface area of the shell. When the hinged pairs of shells are shut, they form a pattern of spherical voids which can be connected to an inlet port, which receives a combination of alpha-olefin monomer feedstock and a titanium trichloride catalyst. A reactor chamber houses a plurality of these hinged pairs of shells, which may slide into slots inside the reactor chamber spaced such that each adjacent hinged pair of shells abuts the outer surface of the next when shut and inserted. The reactor chamber is cooled by an inert gas.
Abstract:
Die Erfindung betrifft ein Verfahren (100) zum Fertigen eines Drucksensors (200) mit drucksensitivem Medium (207), umfassend: Bereitstellen (101) eines Drucksensors (200) mit einem Drucksensorelement (201), das in einem Aufnahmeraum (205) eines Gehäuses (203) des Drucksensors (200) angeordnet ist; Befüllen (103) des Aufnahmeraums (205) mit einem drucksensitiven Medium (207); Aufbringen (105) eines mit dem drucksensitiven Medium (207) nicht mischbaren zweiten Mediums (209) auf eine Oberfläche (211) des drucksensitiven Mediums (207); Ausbilden (107) einer Membran (213) in einem Grenzbereich (215) zwischen dem drucksensitiven Medium (207) und dem zweiten Medium (209) durch eine Phasentransfer-Reaktion zwischen einer ersten Reaktanz (217) und einer zweiten Reaktanz (219), wobei wenigstens die erste Reaktanz (217) oder die zweite Reaktanz (219) im drucksensitiven Medium (207) oder im zweiten Medium (209) gelöst ist. Die Erfindung betrifft ferner einen durch das Verfahren (100) gefertigten Drucksensor (200).
Abstract:
Processes and systems for dehydrogenating ethylbenzene may include mixing a steam stream and an ethylbenzene stream to form a feed mixture. The ethylbenzene / steam feed mixture may then be fed to a dehydrogenation reactor containing an alkali metal promoted catalyst. A liquid, selected from an alkali metal liquid, an alkali metal compound liquid, or a liquid solution comprising an alkali metal, may be injected into a feed stream, such as the steam stream, the ethylbenzene stream, or the ethylbenzene / steam feed mixture. Following injection, the liquid vaporizes and disperses into the feed stream upstream of the dehydrogenation reactor. The liquid may be maintained as a liquid from a point upstream of injection to an injection nozzle. The liquid is dispersed through the injection nozzle, in liquid form, to form droplets of liquid dispersed in the feed stream, which evaporate and/or dissolve into the vaporous feed stream.
Abstract:
Dilatometer systems for measuring characteristics of material samples are disclosed. In one embodiment, a dilatometer system includes a reactor adapted to receive the test sample, a density trap in fluid communication with the reactor, a first fluid selectively filling the reactor and a portion of the density trap, and a second fluid selectively filling a portion of the density trap. The first fluid and the second fluid are immiscible with one another and selectively form an immiscible fluid boundary in the density trap. The dilatometer system further includes a heater that selectively heats the first fluid.
Abstract:
A method for the preparation of an organic-inorganic hybrid composition is performed through three major steps. In addition, a product is generated from this organic-inorganic hybrid composition. In step one, a series of hydrolysis reactions and condensation reactions with a functional organosilane or a combination of functional organosilanes, in presence of water as a reactant for hydrolysis and a suitable acid or a base as a catalyst is performed in order to obtain the first intermediate. In step two, a hydroxyl group-capping intermediate is prepared via reacting a hydroxyl reactable chemical with a hydroxyl functional polymerizable compound. In the third step, a hydroxyl group-capping reaction is conducted with the first intermediate and the hydroxyl group-capping intermediate, so as to obtain the organic-inorganic hybrid composition. It may further include a polymerization step to form an organic-inorganic hybrid polymer composition by UV irradiation or other approaches.
Abstract:
The invention provides an apparatus that comprises at least a first channel providing a first liquid flow path for a liquid to be treated and a second channel arranged adjacent the first channel providing a second liquid flow path downstream the first flow path for the liquid to be treated, wherein the first and second channels each comprise a light receiving surface provided with respective first and second photocatalysts arranged for initiating a photoreaction inside the respective channel to produce a photoreaction product, wherein downstream the first and second channels, first and second separators, respectively, are arranged for removing the photoreaction product from the liquid passing said respective separator, wherein the first and second channels are conductively interconnected such that the liquid passing along the first liquid flow path is in electrical contact with the liquid passing along the second flow path.