Method and device for producing composition having disperse phase dispersed in continuous phase

Patent metadata

Field	Value
Publication number	US-10005045-B2
Application number	US-201414759110-A
Country	US
Kind code	B2
Filing date	Jan 10, 2014
Priority date	Jan 10, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A method for producing a composition having a disperse phase with small particle size dispersed in a continuous phase and having greater than 20% by volume of a disperse phase. The method comprising a permeation step, wherein a mixture of a continuous phase liquid and a disperse phase liquid simultaneously permeate a circumferential surface of a cylinder, which is partially or wholly composed of a porous membrane. The cylinder having outlets for the composition in the cross sections of both ends of the cylinder. The porous membrane having an average pore size of not smaller than 5 μm at a membrane permeation rate of not lower than 50 m 3 /m 2 h. The porous membrane cylinder having a longitudinal effective membrane length, L, the internal diameter of the outlets, d, and the membrane permeation rate, F, which satisfy the relationships disclosed herein of L/d and F.

First claim

The invention claimed is:

1. A method for producing a composition having greater than 20% by volume of a disperse phase dispersed in a continuous phase, the method comprising:
providing a mixture comprising a continuous phase liquid and a disperse phase liquid; and
conducting a permeation step at which the continuous phase liquid and the disperse phase liquid are caused to simultaneously permeate a porous membrane having an average pore size of not smaller than 5 μm at a membrane permeation rate of not lower than 50 m 3 /m 2 h,
wherein the permeation step is carried out by using a production device comprising:
a cylinder having a circumferential surface partially or wholly composed of a porous membrane, the cylinder being provided, in the cross sections of both ends thereof, with outlets for the composition having the disperse phase finely dispersed in the continuous phase;
a storage portion for storing the continuous phase liquid and the disperse phase fluid, the storage portion being provided on an outer periphery of the circumferential surface of the cylinder; and
a pump and/or a pipe for simultaneously supplying the continuous phase liquid and the disperse phase fluid from the storage portion into the cylinder, and
wherein, when the longitudinal length of a porous membrane portion is defined as an effective membrane length L and the internal diameter of the outlets is defined as d, L/d and the membrane permeation rate F satisfy the following relationships:
when 50 m 3 /m 2 h≤F≤200 m 3 /m 2 h, then 2≤L/d≤45;
when 200 m 3 /m 2 h<F≤400 m 3 /m 2 h, then 2≤L/d≤23;
when 400 m 3 /m 2 h<F≤800 m 3 /m 2 h, then 1≤L/d≤12;
when 800 m 3 /m 2 h<F≤1600 m 3 /m 2 h, then 1≤L/d≤6;
when 1600 m 3 /m 2 h<F≤2000 m 3 /m 2 h, then 1≤L/d≤4.4.

2. The method according to claim 1 , wherein the disperse phase in the composition has an average particle size that is smaller than the average pore size of the porous membrane.

3. The method according to claim 1 or 2 , wherein the disperse phase in the composition has a span, as defined by the following equation (1), of 0.4 to 0.6:
Span=( d 90 −d 10 )/ d 50   (1)

where:
d 10 : a particle size when the cumulative distribution of disperse phase particles is 10%,
d 90 : a particle size when the cumulative distribution of disperse phase particles is 90%, and
d 50 : a particle size when the cumulative distribution of disperse phase particles is 50%.

4. The method according to claim 1 , wherein the permeation step is carried out only once.

5. The method according to claim 1 , wherein the membrane permeation rate is in the range of 60-2000 m 3 /m 2 h.

6. The method according to claim 1 , wherein the continuous phase contains, as a surfactant, 0.1-5% by mass of an anionic surfactant.

Assignees

• Univ Kyushu Nat Univ Corp

Inventors

• Shimoda Mitsuya
• Karatani Naohiro
• Yachigo Hiroki
• Masuo Miki

Classifications

• B01F2003/0849

  Operations & Transport · mapped topic

• B01F3/0807

  Operations & Transport · mapped topic

• B01F3/0811 Primary

  Operations & Transport · mapped topic

• B01F5/0692

  Operations & Transport · mapped topic

• B01F2215/0431

  Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof · CPC title