A method for producing (meth) acrylic resin at a low cost while maintaining high transparency even in long-term production using a polymerization apparatus is provided. A (meth) acrylic resin is obtained by the method comprising storing a thiol chain transfer agent in a tank made of an austenitic stainless steel with a Mo content of 0.5 to 7.0% by mass, transferring the thiol chain transfer agent to a polymerization reactor made of an austenitic stainless steel with a Mo content of 0.5 to 7.0% by mass via a pipe made of an austenitic stainless steel with a Mo content of 0.5 to 7.0% by mass, radical-polymerizing methyl methacrylate in the polymerization reactor to obtain a reaction product, and then removing an unreacted material from the reaction product.

Apparatus and methods are provided for converting methane in a feed stream to acetylene. A hydrocarbon stream is introduced into a supersonic reactor and pyrolyzed to convert at least a portion of the methane to acetylene. The reactor effluent stream may be treated to convert acetylene to another hydrocarbon process.

Apparatus and methods are provided for converting methane in a feed stream to acetylene. A hydrocarbon stream is introduced into a supersonic reactor and pyrolyzed to convert at least a portion of the methane to acetylene. The reactor effluent stream may be treated to convert acetylene to another hydrocarbon process.

Apparatus and methods are provided for converting methane in a feed stream to acetylene. A hydrocarbon stream is introduced into a supersonic reactor and pyrolyzed to convert at least a portion of the methane to acetylene. The reactor effluent stream may be treated to convert acetylene to another hydrocarbon process.

Apparatus and methods are provided for converting methane in a feed stream to acetylene. A hydrocarbon stream is introduced into a supersonic reactor and pyrolyzed to convert at least a portion of the methane to acetylene. The reactor effluent stream may be treated to convert acetylene to another hydrocarbon process.

A molten salt reactor comprising a reactor vessel and a molten salt contained within the reactor vessel. There is a corrosion reduction unit configured to process the molten salt to maintain an oxidation reduction ratio, (E(o)/E(r)), in the molten salt at a substantially constant level, wherein E(o) is an element (E) at a higher oxidation state (o) and E(r) is the element (E) at a lower oxidation state (r).

A molten salt reactor comprising a reactor vessel and a molten salt contained within the reactor vessel. There is a corrosion reduction unit configured to process the molten salt to maintain an oxidation reduction ratio, (E(o)/E(r)), in the molten salt at a substantially constant level, wherein E(o) is an element (E) at a higher oxidation state (o) and E(r) is the element (E) at a lower oxidation state (r).

A fluid mixing structure (10) for mixing at least two fluidic components has a flow inlet port and a flow outlet port and comprises a contraction zone (12), an expansion zone (14), and a retention zone (16), arranged in this order in an inflow direction (IFD) of a fluid flow to flow through said fluid mixing structure (10) and being composed of said at least two fluidic components, and a flow splitter (32) arranged In a space (30) formed by said expansion zone (14) and said retention zone (16) to split said fluid flow in a first sub fluid flow and a second sub fluid flow flowing in a first flow path and a second flow path, respectively, formed in the fluid mixing structure, and to mix said first and second sub fluid flows within said space (30) to generate and discharge a homogenized fluid flow, wherein said flow splitter (32) is arranged and configured to let any flow element of each of said first and second sub fluid flows prior to their mixing have a non-zero average flow component in said inflow direction (IFD).

A fluid mixing structure (10) for mixing at least two fluidic components has a flow inlet port and a flow outlet port and comprises a contraction zone (12), an expansion zone (14), and a retention zone (16), arranged in this order in an inflow direction (IFD) of a fluid flow to flow through said fluid mixing structure (10) and being composed of said at least two fluidic components, and a flow splitter (32) arranged In a space (30) formed by said expansion zone (14) and said retention zone (16) to split said fluid flow in a first sub fluid flow and a second sub fluid flow flowing in a first flow path and a second flow path, respectively, formed in the fluid mixing structure, and to mix said first and second sub fluid flows within said space (30) to generate and discharge a homogenized fluid flow, wherein said flow splitter (32) is arranged and configured to let any flow element of each of said first and second sub fluid flows prior to their mixing have a non-zero average flow component in said inflow direction (IFD).

A polymerization reactor of the present invention includes a container body 1 and a jacket 2 covering the outer surface of the container body 1 and defining a passage for passing a cooling/heating medium between itself and the outer surface of the container body. The container body 1 is made of a clad metal plate including a support metal layer 11a having an inner surface at an inner side of the container body and an outer surface at an outer side of the container body, and an inner corrosion-resistant metal skin layer 11b bonded to the inner surface of the support metal layer and being smaller in thickness than the support metal layer.