The present disclosure generally relates to a reactor, in particular to a multiphase interface reactor applicable to chemistry, chemical industry, food, medicine, cosmetics and other fields. The reactor comprises a reaction cylinder; at least one feed port opened in the reaction cylinder; a stirring device, at least a part of the stirring device being located inside the reaction cylinder; at least one cylinder including a first cylinder and a second cylinder, wherein, the reaction cylinder, the first cylinder, and the second cylinder communicate with each other; an annular space is formed between the reaction cylinder and the second cylinder, so that at least part of a reaction product is allowed to enter the annular space from the reaction cylinder, and enter the first cylinder from the annular space; and at least one discharge port arranged on the first cylinder.

A built-in micro interfacial enhanced reaction system and process for PTA production with PX are provided. The system includes a reactor and a micro interfacial unit disposed inside reactor. The reactor includes a shell, an inner cylinder concentrically disposed inside shell, and a circulating heat exchange device partially disposed outside shell, inner cylinder having a bottom end connected to inner bottom surface of the shell in closed manner and an open top end, a region between shell and inner cylinder being first reaction zone, inner cylinder containing second reaction zone and third reaction zone from top to bottom, circulating heat exchange device being connected to inner cylinder and micro interfacial unit respectively. The invention can solve problems of large waste of reaction solvent acetic acid under high temperature and high pressure and being unable to take out the product TA in time during existing process of PTA production with PX.

A process and apparatus for the continuous conversion of isotropic carbonaceous materials into anisotropic mesophase pitch is disclosed. The invention disclosed herein addresses the need for lower production costs compared with traditional batch mesophase conversion of isotropic pitch. A unique thermal processing and in-process separation of reacted mesophase from the continuous matrix of fresh or partially reacted isotropic pitch is provided. Potential uses are for further continuous processing into carbon fibers or carbon form densification.

A process and apparatus for the continuous conversion of isotropic carbonaceous materials into anisotropic mesophase pitch is disclosed. The invention disclosed herein addresses the need for lower production costs compared with traditional batch mesophase conversion of isotropic pitch. A unique thermal processing and in-process separation of reacted mesophase from the continuous matrix of fresh or partially reacted isotropic pitch is provided. Potential uses are for further continuous processing into carbon fibers or carbon form densification.

A process for manufacturing a solution of a fluorocopolymer in a solvent, the solvent having a boiling point above or equal to 150° C. at 1013 hPa and/or a saturation vapour pressure less than or equal to 5 hPa at 20° C., the process including a step of mixing said fluoropolymer with the solvent in a reactor having a stirring spindle including at least one blade, at a mixing temperature ranging from 40° C. to 100° C., and at a blade tip stirring speed of greater than or equal to 0.1 m/s, until said polymer has dissolved in the solvent. Also, a solution of the copolymer in this solvent that includes no co-solvent having a boiling point strictly below 150° C. at 1013 hPa and/or a saturation vapour pressure strictly greater than 5 hPa at 20° C.

A process for manufacturing a solution of a fluorocopolymer in a solvent, the solvent having a boiling point above or equal to 150° C. at 1013 hPa and/or a saturation vapour pressure less than or equal to 5 hPa at 20° C., the process including a step of mixing said fluoropolymer with the solvent in a reactor having a stirring spindle including at least one blade, at a mixing temperature ranging from 40° C. to 100° C., and at a blade tip stirring speed of greater than or equal to 0.1 m/s, until said polymer has dissolved in the solvent. Also, a solution of the copolymer in this solvent that includes no co-solvent having a boiling point strictly below 150° C. at 1013 hPa and/or a saturation vapour pressure strictly greater than 5 hPa at 20° C.

A process produces methyl methacrylate by direct oxidative esterification of methacrolein. Methyl methacrylate is used in large amounts for producing polymers and copolymers with other polymerizable compounds. An optimized workup of the reactor discharge from the oxidative esterification of methacrolein allows for co-discharged fine catalyst particles to be very efficiently separated and optionally removed or recycled. In addition, this process can reduce the formation of byproducts in extended continuous operation compared to known variant. A reactor system contains stirrer configurations which allow virtually abrasion-free operation and thus a catalyst on-stream time of several years.

A method of evaporating a fluid is provided. The method comprises forming a flow with toroidal vortices in the fluid, such that the fluid is exposed to alternating flow velocities and alternating pressures, thereby increasing evaporation of the fluid. A method of precipitating salt out of an aqueous solution is also provided. The method comprises forming a flow with toroidal vortices in the aqueous solution, such that the aqueous solution is exposed to alternating flow velocities and alternating pressures, thereby initiating precipitation of salts from the solution.

Provided is a lithium nitride manufacturing device (10) for heating a lithium member (9) in a nitrogen atmosphere to nitride the lithium member (9) such that lithium nitride is manufactured, the lithium nitride manufacturing device including: a reaction tank (1) where a nitriding reaction of the lithium member (9) is performed; a heating unit (2) that heats the lithium member (9); an atmosphere control unit (3) that controls a dew point in the reaction tank (1); and an atmosphere cooling unit (4) that cools an inside of the reaction tank (1).

Provided is a lithium nitride manufacturing device (10) for heating a lithium member (9) in a nitrogen atmosphere to nitride the lithium member (9) such that lithium nitride is manufactured, the lithium nitride manufacturing device including: a reaction tank (1) where a nitriding reaction of the lithium member (9) is performed; a heating unit (2) that heats the lithium member (9); an atmosphere control unit (3) that controls a dew point in the reaction tank (1); and an atmosphere cooling unit (4) that cools an inside of the reaction tank (1).