The present invention relates to a pressure vessel (1, 1′), having a lower part (20) and the lid (24) which can be locked to one another, in order, in the state in which they are locked to one another, to surround a reaction chamber (22) on all sides as a pressure space for initiating and/or promoting chemical and/or physical pressure reactions of samples (P) which are received in the reaction chamber (22), and a fluid inlet (FE) with a check valve (4) for feeding a fluid into the reaction chamber (22), the check valve (4) extending at least partially in the lid (24).

A method for preparing a thermoplastic polyurethane elastomer material with micro air holes is provided. The method comprises the following steps: (1) is feeding liquid raw materials such as diisocyanate molecules and solid additives into a double-screw reactor to trigger a polymerization type chain extension reaction and then obtain a macromolecular weight hot melt. (2) is pushing the macromolecular weight hot melt into a mixing extruder and allowing the reaction to continue to obtain a macromolecular thermoplastic polyurethane melt. (3) is continuously adding the obtained macromolecular thermoplastic polyurethane melt together with polymer particles into a foaming extruder, and extruding the high-pressure hot melt from a mold head into an underwater granulation chamber. (4) is delivering the particles obtained after granulation into a separator by process water via a multi-stage pressure-release process water pipeline, separating, screening and drying the required particles to obtain the target product.

The present invention relates to a method for preparing a modification polymerization initiator with a high conversion ratio by minimizing side reactions. According to the method for preparing a modification polymerization initiator, a modification polymerization initiator which may easily initiate polymerization and provide a polymer with a functional group having affinity with a filler, may be prepared. Particularly, by performing the method using a continuous reactor, the production of by-products may be decreased, and as a result, the conversion ratio may be increased and a modification polymerization initiator with high purity may be prepared in a high yield.

A method for minimizing the amount of catalyst inactivating agent that is present in a liquid fraction recovered from a slurry-based polymer production process, the liquid fraction comprising diluent used in the polymer production process, is disclosed. The method includes steps for controlling the pressure over the liquid fraction collected during diluent recovery so as to minimize the concentration of catalyst inactivating agent that is retained in the recovered liquid fraction. Embodiments of apparatus suitable for conducting the disclosed method are also provided.

A process for synthesis of urea from ammonia and carbon dioxide wherein: the urea synthesis is performed with a stripping process in a synthesis loop including at least a reactor (1), a stripper (2) and a condenser (3); the reactor effluent is treated in the stripper to remove unreacted ammonia and carbon dioxide; the urea solution (14) from the stripper is sent to a low-pressure recovery section (4); the stripper vapours are split into a first portion (151) directed to the reactor and a second portion (152) sent to the condenser; the condenser (3) is a shell-and-tube kettle condenser where condensation of stripper vapours is performed in the tube side (30); a carbamate-containing effluent (20) from the condenser is returned to the reactor.

Methods for operating a high pressure olefin polymerization reactor include the steps of introducing an initiator stream containing ethylene and an initiator compound through an initiator nozzle into the reactor, introducing an olefin stream containing ethylene and an optional comonomer through an olefin nozzle into the reactor, and polymerizing ethylene and optionally the comonomer in the presence of the initiator stream in the reactor under high pressure polymerization conditions to produce an ethylene polymer. The amount of ethylene in the initiator stream is from 0.01 to 2 wt. % of the amount of ethylene in the olefin stream. An injection nozzle that can be used in conjunction with the high pressure reactor also is described.

A system including a dump tank to receive a reactor product comprising a polymer and hydrocarbons, including liquid hydrocarbons, the dump tank including a vessel with a reactor product inlet, a motive gas inlet, a purge gas inlet, gas outlet(s), and a fluid outlet, the motive gas inlet for introducing a motive gas into the vessel, the purge gas inlet for introducing a purge gas into the vessel, the one or more gas outlets located at a top of the vessel and the fluid outlet located at a bottom of the vessel and fluidly connected with a dump tank fluid outlet line having a dump tank outlet valve to control flow of fluid out of the dump tank via the fluid outlet; and a strainer fluidly connected with the dump tank fluid outlet line to allow passage of liquid hydrocarbons therethrough into a hydrocarbon outlet line.

A device and a process to propagate molecular growth of hydrocarbons, either straight or branched chain structures, that naturally occur in the gas phase of a first gas to gas phase molecules of a second gas having higher molecular chain lengths than the hydrocarbons of the first gas. According to one embodiment, the device includes a grounded reactor vessel having a gas inlet, a product outlet, and an electrode within the vessel; a power supply coupled to the electrode for creating an electrostatic field within the vessel for converting the first gas to a second gas.

Systems and methods for the treatment of plants, including decarboxylation, photo-oxidation, oxidation and/or combinations thereof, of cannabis and hemp plants and oils for biosynthesizing THCA, CBDA, and CBCA from CBGA are disclosed. A cannabinoid compound solution is fed into a cavitation zone of a controlled cavitation apparatus where the cannabinoid compound solution is subjected to cavitation and interaction with UV light for conversion of the cannabinoid compound solution to form a synthesized cannabinoid THC, CBD, CBC, CBG, CBNA, CBEA, CBLA product, or combinations thereof.

A continuous synthesis system of urea, including: a reactor, a mixing buffer tank for accommodating a first raw material, a feeding pump for pumping the first raw material to the reactor, a pressure regulating valve connected to the reactor to transfer a second raw material and regulate a pressure of the second raw material, a first heat exchanger connected to the reactor to regulate a temperature inside the reactor to a first preset temperature, and a back pressure valve connected to an end of the reactor away from the feeding pump to maintain a pressure of the continuous synthesis system at a preset pressure. The second raw material is gaseous. The second raw material is fed to the reactor through the pressure regulating valve to react with the first raw material in the reactor to generate a target product.