A modular reactor device has an outer housing, a reaction chamber, a fluid pathway connected to the reaction chamber, and a valve to control flow of fluid within the device. The outer housing has a plurality of connection ports including: a fluid input and a fluid output; an electrical input; and a pneumatic input. Either the electrical input or the pneumatic input is connected to the valve to provide for control of the valve, and either the fluid input or the fluid output is connected to the reaction chamber or the fluid pathway. Other aspects provide a base station for receiving and controlling a modular reactor device and methods for manufacturing the modular reactor device and for performing reactions using a modular reactor device.

Controlling the shutdown of a polyethylene reactor system that includes a secondary compressor, a reactor, a high pressure let down valve (HPLDV), a high-pressure separator, and a high-pressure recycle gas system is provided. After a partial or complete shutdown of secondary compressor, HPLDV opens to a pre-set open position until the reactor pressure reduces to either a pre-set reduced pressure limit or a until the slope of the reactor gas density to reactor pressure exceeds 0.15. The HPLDV controls the pressure to a pressure set point.

A feed supply unit comprising (a) a feed dosage unit for supplying a viscosity unstable liquid feed to a reactor, (b) a flushing unit for flushing at least a part of the feed dosage unit according to (a) with a flushing medium, and (c) a signal transmission means for transmitting a signal from a monitoring means to a control means.

A process for polymerizing ethylene in a high-pressure polymerization system having a continuously operated polymerization reactor and a reactor blow down system having an emergency valve, a reactor blow down vessel containing an aqueous medium and a reactor blow down dump vessel, wherein the process includes the steps of monitoring the polymerization system for a disturbance, opening the emergency valve when a disturbance occurs to allow the content of the polymerization system to expand into the reactor blow down vessel, contacting the content of the polymerization system in the reactor blow down vessel with the aqueous medium to obtain an aqueous polymer slurry, separating the polymer slurry and gaseous components, and transferring the polymer slurry to the reactor blow down dump vessel.

A cap closes a sample vessel for the microwave treatment of samples. The cap contains a closure body for closing the sample vessel. The closure body is fitted to the sample vessel and closes the sample vessel at a sealing surface. A spring-loaded pressure relief valve and a vent duct are provided. The vent duct, the pressure relief valve and the closure body are configured in such a manner that the vent duct connects the closure body via the pressure relief valve to the surrounding area such that when a defined first pressure level is exceeded at the closure body excess pressure can escape through the vent duct into the area surrounding the cap. A reservoir is provided. The reservoir and the vent duct are configured such that condensate precipitating in the vent duct accumulates in the reservoir when the cap is in the state fitted to the sample vessel.

A liquid process assembly, the assembly including a length of pipework, and a reversible pump for selectively reciprocally moving liquid through the pipework.

Disclosed are methods and apparatuses for processing a powder alloy to improve its microstructure. The methods for processing the powder alloy can include introducing the powder alloy into a powder vessel having an inert atmosphere, uniformly heat treating the powder alloy inside the powder vessel at its solutionizing temperature, and cooling the heat treated powder alloy at a rate of at least 5° C./s to form treated particles. The treated particles obtained from the methods and apparatuses disclosed herein can be used in any suitable manufacturing process, such as in cold gas dynamic spray.

Aspects of the present invention provide a modular reactor device having an outer housing, and a plurality of components contained within the outer housing, the components including: a reaction chamber; a fluid pathway connected to the reaction chamber; and a valve arranged to control flow of fluid within the device, wherein the outer housing has a plurality of connection ports providing connections from the exterior of the device to the interior, the connection ports including: a fluid input and a fluid output; an electrical input; and a pneumatic input; wherein either the electrical input or the pneumatic input is connected to the valve to provide for control of the valve, and either the fluid input or the fluid output is connected to the reaction chamber or the fluid pathway. Other aspects provide a base station for receiving and controlling a modular reactor device and methods for manufacturing the modular reactor device and for performing reactions using a modular reactor device.

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.

This disclosure relates to systems and processes for cooling polymer product mixtures manufactured at high pressure. The processes of the invention involve cooling and then subsequently reducing the pressure of the product mixture from the reactor. In the systems of the invention, a product cooler is located downstream of the high pressure reactor and upstream of a high pressure let down valve.