# US 2014/0155247 A1 · Method for producing microparticles having controlled crystallite diameter

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- Number: US 2014/0155247 A1
- Document ID: US20140155247A1
- Status: Published application
- Kind: A1
- Application number: 14/232,124
- Filed: 2012-07-05
- Published: 2014-06-05
- Earliest claimed: 2011-07-13
- Assignees: M. Technique Co., Ltd.
- Inventors: Shiho Aoyagi; Kaeko Araki; Masaki Maekawa; Jun Kuraki; Masakazu Enomura
- Web page: https://patentgrep.com/patent/US20140155247A1

## CPC

- B01D 9/0063: {Control or regulation (control per se G05)}
- B01D 9/0054: {Use of anti-solvent}
- B01J 19/1887: {forming a thin film}
- C04B 35/626: Preparing or treating the powders individually or as batches {(pigments for ceramics C09C1/0009); preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B}
- C22B 15/0089: {by chemical methods}
- B01J 2219/00085: Plates; Jackets; Cylinders
- B01J 2219/00164: controlling the flow
- B01J 2219/00177: controlling the pH
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C22B: PRODUCTION AND REFINING OF METALS (electrolytic C25); PRETREATMENT OF RAW MATERIALS

## Abstract

At least two types of fluids to be processed are mixed in a thin film fluid formed between at least two processing surfaces which are approachably and separably disposed facing each other. At least one processing surface rotates relative to the other, and a substance to be separated giving a controlled crystallite diameter is caused to separate. Specific conditions related to a fluid to be processed are varied to control the crystallite diameter of the substance to be separated. The specific conditions are the type of substance to be separated; the concentration of the substance to be separated included in the raw material fluid and/or substance included in the separating fluid; the pH of the raw material fluid and/or separating material fluid; the introduction temperature of the raw material fluid and/or separating fluid; and the introduction velocity of the raw material fluid and/or separating fluid.

## Claims

### Claim 1

A method for producing a microparticle, wherein at least two fluids to be processed are used,
of these at least one fluid to be processed is a raw material fluid containing at least one substance to be separated, and
at least one fluid to be processed other than the foregoing fluid to be processed is a separating fluid containing at least one substance to separate the substance to be separated;
these fluids to be processed are mixed in a thin film fluid formed between at least two processing surfaces which are disposed in a position they are faced with each other so as to be able to approach to and separate from each other, at least one of which rotates relative to the other, thereby separating the substance to be separated having a crystallite diameter thereof controlled;
the crystallite diameter of the substance to be separated is controlled by changing specific conditions with regard to at least any one of the raw material fluid and the separating fluid that are introduced into between the at least two processing surfaces;
the said specific conditions being at least two conditions selected from the group consisting of:
kind of at least any one of at least one substance to be separated contained in the raw material fluid and at least one substance contained in the separating fluid,
concentration of at least any one of at least one substance to be separated contained in the raw material fluid and at least one substance contained in the separating fluid,
pH of at least any one of the raw material fluid and the separating fluid,
introduction temperature of at least any one of the raw material fluid and the separating fluid, and
introduction velocity of at least any one of the raw material fluid and the separating fluid.

### Claim 2 (depends on 1)

The method for producing a microparticle according to claim 1, wherein only the crystallite diameter of the substance to be separated is changed without changing the particle diameter of the substance to be separated.

### Claim 3 (depends on 1)

The method for producing a microparticle according to claim 1, wherein both the particle diameter of the substance to be separated and the crystallite diameter of the substance to be separated are changed.

### Claim 4

A method for producing a microparticle, wherein at least two fluids to be processed are used,
of these at least one fluid to be processed is a raw material fluid containing at least one substance to be separated, and
at least one fluid to be processed other than the foregoing fluid to be processed is a separating fluid containing at least one substance to separate the substance to be separated;
these fluids to be processed are mixed in a thin film fluid formed between at least two processing surfaces which are disposed in a position they are faced with each other so as to be able to approach to and separate from each other, at least one of which rotates relative to the other, thereby separating the substance to be separated having a crystallite diameter thereof controlled;
the crystallite diameter of the substance to be separated is controlled by changing a specific condition with regard to at least any one of the raw material fluid and the separating fluid that are introduced into between the at least two processing surfaces;
the said specific condition being at least one condition selected from the group consisting of:
pH of at least any one of the raw material fluid and the separating fluid,
introduction temperature of at least any one of the raw material fluid and the separating fluid, and
introduction velocity of at least any one of the raw material fluid and the separating fluid.

### Claim 5 (depends on 2)

The method for producing a microparticle according to claim 2, wherein both the particle diameter of the substance to be separated and the crystallite diameter of the substance to be separated are changed.