Fluid processing method

Patent metadata

Field	Value
Publication number	US-11065588-B2
Application number	US-201414787979-A
Country	US
Kind code	B2
Filing date	Apr 28, 2014
Priority date	Apr 30, 2013
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A fluid processing method with which processing properties of fluids to be processed can be effectively controlled. Processing surfaces which are capable of being brought closer to each other and being separated from each other, and which rotate relatively are provided. A fluid to be processed is made to pass from inside to outside in a processing area between the processing surfaces to obtain a fluid thin film, and the resultant fluid thin film of the fluid to be processed is subjected to processing. Processing properties are controlled by changing the ratio of the distance to an outer peripheral end from a centre of rotation.

First claim

The invention claimed is:

1. A fluid processing method comprising:
an introducing step in which a fluid to be processed is introduced through two or more of introduction parts into a space between at least two processing surfaces facing each other so as to be able to approach or separate from each other, at least one of the at least two processing surfaces rotating relative to the other, and
a processing step in which the fluid processing is performed while a thin film fluid formed by the fluid to be processed is passing through the space between the at least two processing surfaces, and then the fluid to be processed is discharged from the space between the two processing surfaces,
wherein:
at least two kinds of fluids are used as the fluid to be processed;
the two or more of introduction parts comprise an inside introduction part and an intermediate introduction part which is disposed in a position more apart from a center of the rotation of at least one of the at least two processing surfaces than the inside introduction part;
in the processing step, the space between the processing surfaces is a processing region having the inside introduction part, which is disposed in an inner side of the processing surfaces, as an upstream side of the processing region, and an outer circumference side of the rotation as a downstream side of the processing region, and then the fluid to be processed is discharged from an outer circumference edge of the processing region;
the processing region comprises a mixing region which is located more apart from the center of the rotation than the intermediate introduction part and an unmixed region which is located nearer to the center of the rotation than the intermediate introduction part;
the introduction step comprises a step of introducing at least one kind of the fluids to be processed into the unmixed region from the inside introduction part and a step of introducing at least one other fluid to be processed into the mixing region from the intermediate introduction part;
the processing step comprises a step of mixing in the mixing region the fluid to be processed which is introduced from the inside introduction part with the fluid to be processed which is introduced from the intermediate introduction part; and
the at least two kinds of fluids include a raw material fluid containing a substance to be separated and a fluid to separate microparticles of the substance from the raw material fluid;
further in the processing step, at least any one of following controls of the processing characteristics is carried out by selecting a ratio Od/Cd of a distance Od from the center of the rotation to the outer circumference edge to a distance Cd from the center of the rotation to the intermediate introduction part to be within the range of 1.25 to 5.0:
a crystallinity control in which crystallinity of the microparticles is increased compared to processing carried out outside the range of Od/Cd,
a d/D control in which a ratio of crystallite diameter d to particle diameter D of the microparticles is increased compared to processing carried out outside the range of Od/Cd, and
a control in which a particle size distribution of the microparticles is made narrower compared to processing carried out outside the range of Od/Cd.

2. The fluid processing method according to claim 1 , wherein as the control of the processing characteristics, the following controls are carried out:
the crystallinity control in which crystallinity of the microparticles is increased compared to processing carried out outside the range of Od/Cd, and
the d/D control in which the ratio of crystallite diameter to particle diameter of the microparticles is increased compared to processing carried out outside the range of Od/Cd; and
the crystallinity control is to increase crystallinity of the microparticles by increasing the ratio of the distance from the center of the rotation to the outer circumference edge to the distance from the center of the rotation to the intermediate introduction part, and to decrease the crystallinity by decreasing the ratio of the distance from the center of the rotation to the outer circumference edge to the distance from the center of the rotation to the intermediate introduction part, and
the d/D control is to increase the crystallite diameter as well as the ratio of the crystallite diameter to the particle diameter of the microparticles by increasing the ratio of the distance from the center of the rotation to the outer circumference edge to the distance from the center of the rotation to the intermediate introduction part, and to decrease the crystallite diameter as well as the ratio of the crystallite diameter to the particle diameter of the microparticles by decreasing the ratio of the distance from the center of the rotation to the outer circumference edge to the distance from the center of the rotation to the intermediate introduction part.

3. The fluid processing method according to claim 2 , wherein
the unmixed region includes a coercive introducing region and a thin film controlling region which is located radially outward of the coercive introducing region with respect to the center of the rotation;
the coercive introducing region is formed such that in at least one of the at least two processing surfaces, a depression structure resulting in a micropump effect is extended in a direction from the upstream side to the downstream side, and
the thin film controlling region is a region between a downstream end of the depression structure and the intermediate introduction part;
at least one kind of the fluids to be processed is coercively introduced by the depression structure from the inside introduction part to the coercive introducing region, and in the thin film controlling region, pulsation and pressure variance generated by the micropump effect are reduced so that the fluid to be processed becomes a flow under the condition of spiral laminar flow and then flows to the mixing region; and
the control of the processing characteristics is carried out by increasing or decreasing a width ratio of a width of the mixing region in a radius direction of the rotation to a width of the thin film controlling region in the radius direction of the rotation.

4. The fluid processing method according to claim 1 , wherein
the unmixed region includes a coercive introducing region and a thin film controlling region which is located radially outward of the coercive introducing region with respect to the center of the rotation;
the coercive introducing region is formed such that in at least one of the at least two processing surfaces, a depression structure resulting in a micropump effect is extended in a direction from the upstream side to the downstream side, and
the thin film controlling region is a region between a downstream end of the depression structure and the intermediate introduction part;
at least one kind of the fluids to be processed is coercively introduced by the depression structure from the inside introduction part to the coercive introducing region, and in the thin film controlling region, pulsation and pressure variance generated by the micropump effect are reduced so that the fluid to be processed becomes a flow under the condition of spiral laminar flow and then flows to the mixing region; and
the control of the processing characteristics is carried out by increasing or decreasing a width ratio of a width of the mixing region in a radius direction of the rotation to a width of the thin film controlling region in the radius direction of the rotation.

5. The fluid processing method according to claim 4 , wherein
the crystallinity control is to increase crystallinity of the microparticles by increasing the width ratio and to decrease crystallinity by decreasing the width

Assignees

• M Technique Co Ltd

Inventors

• Enomura Masakazu

Classifications

• B01F27/2712 Primary

  provided with ribs, ridges or grooves on one surface · CPC title

• B01F35/221

  of operational parameters, e.g. level of material in the mixer, temperature or pressure · CPC title

• B01F23/4146

  Emulsions including solid particles, e.g. as solution or dispersion, i.e. molten material or material dissolved in a solvent or dispersed in a liquid · CPC title

• B01F35/712

  for feeding fluids · CPC title

• B01F23/43

  using driven stirrers · CPC title