A disperser includes an outer member and an inner member located radially inside the outer member. A flow path is formed between the outer member and the inner member, through which fluid flows from one side to the other side in the axial direction. The flow path includes a first region that extends spirally from the one side to the other side and a second region that extends continuously from the first region to the other side. The second region is defined by the tapered inner circumferential surface of the outer member and the tapered outer circumferential surface of the inner member. The tapered inner circumferential surface and the tapered outer circumferential surface are formed such that the angle of one with respect to the other in the axial cross section changes in the middle of the second region, and the second region of the flow path has portions each having a different clearance distance.

A disperser includes an outer member having a tapered inner circumferential surface, an inner member having a tapered outer circumferential surface that faces the tapered inner circumferential surface, and a clearance adjustment part that allows a clearance distance between the tapered inner circumferential surface and the tapered outer circumferential surface to be adjusted by moving the outer member and the inner member relative to each other. A flow path is formed between the inner circumferential surface of the outer member and the outer circumferential surface of the inner member, through which fluid flows from one side to the other side. The flow path includes a dispersion region defined by the tapered inner circumferential surface and the tapered outer circumferential surface. The tapered inner circumferential surface and the tapered outer circumferential surface are formed such that the angle of one with respect to the other in the axial cross section changes in the middle of the dispersion region.

A reactor arrangement for performing, by means of at least one solid reaction member(s), a biological or chemical transformation, or physical or chemical trapping from, or release of agents to, a fluidic media in a continuous process. The arrangement comprises at least one reactor with a cylindrical reaction vessel (11) in which at least one reactor a transformation device (100) has been mounted. The vessel (11) comprises at least one inlet port (30) in the vicinity of its bottom wall (18) and at least one outlet port (40) arranged in the vicinity of its upper end portion. Each inlet port (30) is connected to a fluid supply member (300) configured to be submerged below the fluid surface level in a pool or a pond. The fluid supply member (300) comprises at least one inlet opening (301) configured to continuously supply a fluid from the pool or the pond to the vessel (11). Each outlet port (40) is configured to continuously let out the fluid from the vessel (11) to the pool or the pond via the outlet port (40). Further a method of using the reactor arrangement is provided.

A mixing and dispersing apparatus includes a tank body, a stirring part, a dispersing part, and a driving part. The tank body has an accommodating cavity configured to accommodate materials. The stirring part is disposed in the accommodating cavity and configured to mix the materials in the accommodating cavity. The dispersing part is disposed in the accommodating cavity and includes a first cylinder and a second cylinder. The first cylinder has a first cavity in communication with the accommodating cavity, the second cylinder is located in the first cavity, and the second cylinder has a second cavity in communication with the accommodating cavity. The driving part is connected to the stirring part and the dispersing part. The materials mixed in the accommodating cavity flow into the second cavity and flow out after being dispersed in the dispersing part.

A mixing head 3 which mixes a first preparative liquid formulation containing a norbornene-based monomer with a second preparative liquid formulation containing a metathesis polymerization catalyst includes a casing 4, a cap 7, and a mixing rotor 6. A plurality of protrusions 622 includes first protrusions 622a having a width in the axial direction of the mixing rotor 6 larger than that in the circumferential direction, and second protrusions 622b having a width in the axial direction of the mixing rotor 6 smaller than that in the circumferential direction. First and second protrusion rows 623a and 623b are alternately arranged, the first protrusion rows 623a being formed of the first protrusions 622a aligned at a predetermined interval, the second protrusion rows 623b being formed of the second protrusions 622b aligned at a predetermined interval.

A stirring device of thin-film rotation type includes a tubular portion whose lateral surface has: a band-shaped first region extending circumferentially of the tubular portion and including holes penetrating in a inward-outward direction; and a band-shaped second region extending circumferentially of the tubular portion and including no hole or holes penetrating in the inward-outward direction, where the second region has a smaller aperture ratio than the first region. The first region is located to include a middle of the tubular portion in a height direction The second region ranges from the upper edge of the first region to the upper end of the tubular portion and also from the lower edge of the first region to the lower end of the tubular portion. The first region has a width Wp, and the tubular portion has a height H, where 0<Wp<0.5H.

A stirring device of thin-film rotation type includes a tubular portion whose lateral surface has: a band-shaped first region extending circumferentially of the tubular portion and including holes penetrating in a inward-outward direction; and a band-shaped second region extending circumferentially of the tubular portion and including no hole or holes penetrating in the inward-outward direction, where the second region has a smaller aperture ratio than the first region. The first region is located to include a middle of the tubular portion in a height direction The second region ranges from the upper edge of the first region to the upper end of the tubular portion and also from the lower edge of the first region to the lower end of the tubular portion. The first region has a width Wp, and the tubular portion has a height H, where 0<Wp<0.5H.