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Continuous emulsification method and emulsification apparatus therefor

A technology of emulsification equipment and screen, which is applied in the direction of chemical instruments and methods, mixing methods, dissolution, etc., can solve the problems of poor uniformity of dispersed phase droplets, unsatisfactory, complicated equipment, etc., and achieve good product stability and maintenance The effect of excellent performance and easy assembly

Inactive Publication Date: 2009-04-29
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with equipment using this method is that the equipment itself must have a strong structure, strong wear resistance, etc., which is required due to the extremely high operating pressure in the equipment.
[0023] As mentioned above, the problem of the traditional continuous emulsification method and equipment is that the uniformity of the dispersed phase droplets in the final emulsion produced is extremely poor, it is difficult to scale up, and the equipment is complicated and the maintenance is complicated, which is very unsatisfactory

Method used

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  • Continuous emulsification method and emulsification apparatus therefor
  • Continuous emulsification method and emulsification apparatus therefor
  • Continuous emulsification method and emulsification apparatus therefor

Examples

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example 1

[0081] The emulsification apparatus was constructed by inserting 10 sets of units into a cylindrical housing with an inner diameter of 20 mm, each unit consisting of a wire mesh made of a 1400-mesh main wire mesh and a partition having a length of 10 mm and an inner diameter of 15 mm. The length of the housing is about 120mm.

[0082] As the raw material to be emulsified, a hydrocarbon-based solution (Nisseki Naphtesol (200 grade)) (density: 813kg / m 3 (15°C), distillation boiling point range: 201-217°C, supplied by Nippon Oil Company) mainly includes naphthenic (cycloalkane)-based hydrocarbon mixture and dispersant aqueous solution (1% quality PVA205, supplied by Kuraray Co., Ltd.), And the emulsification was carried out by introducing the raw materials into the emulsification equipment through independent plunger pumps at flow rates of 100 ml / min and 200 ml / min respectively, thereby obtaining an O / W emulsion. The volume average diameter of the dispersed phase droplets of the...

example 2

[0087] An emulsion was prepared by the same operation as in Example 1 except that the number of units to be inserted into the housing was 40. The dispersed phase had a volume average particle size of 18 μm and a CV value of 24%.

example 3

[0089] An emulsion was prepared by the same operation as in Example 1, except that a 250-mesh wire mesh was used as the main wire mesh. The dispersed phase had a volume average particle size of 55 μm and a CV value of 25%.

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PUM

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Abstract

An emulsification method and an emulsification apparatus by which particle size and particle size distribution can be easily controlled, scaling up and maintenance can be conveniently conducted and an emulsified product can be obtained in an industrially practical amount. Namely, a method wherein emulsification is conducted by passing multiple liquids, which are substantially immiscible with each other, continuously and successively through multiple mesh members, which are located at definite intervals, in the presence of an emulsifier; and an apparatus therefor comprising a liquid-feeding pump for feeding two or more liquids, which are substantially immiscible with each other, and a tubular channel into which the two or more liquids as described above are fed from the liquid-feeding pump, characterized in that a definite number of wire mesh members are located at definite intervals in the tubular channel.

Description

technical field [0001] The present invention relates to an emulsification method and emulsification equipment for continuous and stable mass production of emulsion with uniform particle size of dispersed phase. The present invention also relates to microcapsules and polymer fine particles using the emulsion produced by said method and apparatus. Background technique [0002] Emulsions include liquid phase materials that are immiscible with and dispersed in a continuous liquid phase. As such emulsions, known are O / W emulsions in which oil droplets are dispersed in a water-containing continuous phase and W / O emulsions in which water-containing droplets are dispersed in an oil-continuous phase. in phase. In addition, it is known that such emulsions can be produced by interfacial chemical methods using emulsifiers or by mechanical methods using specific emulsifying equipment. These two methods are often used in combination to produce a stable emulsion. In the latter mechanic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/08B01F5/06
Inventor 林照三户上恭男高木彰
Owner NIPPON OIL CO LTD
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