A production process for continuously producing 5-hydroxymethylfurfural uses sugar biomass, a solvent, an auxiliary agent, and an acid catalyst as raw materials, and mixes them uniformly to obtain a water phase material flow. The water phase material flow is preheated and enters a multi-stage reaction apparatus. The product obtained from the reaction is cooled and separated to obtain 5-hydroxymethylfurfural. The device of the present invention takes into account both pure water phase and two-phase system, adopts fully automated program to control the production process, is provided with an online monitoring apparatus, and can monitor the production status of HMF in real time; At the same time, it can effectively solve the problem of the black rot easily blocking pipes caused by the generation of a large amount of humins in the process of producing 5-hydroxymethylfurfural, and the production efficiency is high.

A continuous production system according to an aspect of the present disclosure includes a continuous reactor, a supply path connected to the continuous reactor, a guide path connected to the continuous reactor, a measuring apparatus configured to acquire information on a substance moving in the continuous reactor or in the guide path, and a controller configured to perform control based on the information. The information is electric impedance of the substance or a property of the substance, the property being derived from the electric impedance.

The disclosure provides methods for removing polymeric fouling on process equipment during low density polyethylene manufacture. A purge cleaning composition with ethylene gas containing at least one C3+ hydrocarbon alkene for a period of time is used to remove polymer build-up in at least one location in the polymerization plant, such as, without limitation, the reactor or in tubing between a reactor and a pre-heater or between a cooler and a preheater.

A system and a process for reducing greenhouse gas emissions are disclosed herein. The system may include a combustion zone, a catalytic converter, a methanation reactor, a compressor, a normal venting unit, a vacuum protection unit, and a control system. The process may include feeding a fuel, a methane-containing gas, and an oxygen-containing gas into a first reactor unit, and producing a combustion products stream comprising carbon monoxide, carbon dioxide, and water. The process may include cooling the combustion products stream via a cooling system, feeding the cooled exhaust stream and hydrogen to a second reactor unit. The second reactor unit may include a first catalyst for reacting oxygen with carbon monoxide to form carbon dioxide, and a second catalyst for reacting carbon dioxide with hydrogen to produce methane. The process may include recovering an effluent from the second reactor unit and feeding it to the first reactor unit.

Vapor delivery apparatus configured for generating a gaseous precursor from solid source precursor particles in a fluidized bed are disclosed. In addition, vapor phase reactors including a vapor delivery apparatus including a fluidized bed of solid precursor are also disclosed. Methods for monitoring and a controlling a vapor delivery system including a fluidized bed also disclosed.

A method is described for shutting down a Fischer-Tropsch reactor fed with a reactant gas mixture comprising a synthesis gas and a recycle gas recovered from the Fischer-Tropsch reactor in a synthesis loop, said Fischer-Tropsch reactor containing a Fischer-Tropsch catalyst cooled indirectly by a coolant under pressure, comprising the steps of: (a) depressurising the coolant to cool the reactant gas mixture to quench Fischer-Tropsch reactions taking place in the Fischer-Tropsch reactor, (b) stopping the synthesis gas feed to the Fischer-Tropsch reactor, and (c) maintaining circulation of the recycle gas through the Fischer-Tropsch reactor during steps (a) and (b) to remove heat from the Fischer-Tropsch reactor. The method safely facilitates a more rapid return to operating conditions than a full shut-down.