Overview
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ABSTRACT
This article describes different industrial processes for obtaining emulsions, from mechanical agitation and high-pressure homogenizers (high energy processes) to phase inversion and membrane techniques (low energy processes). It should help decision making for the choice of a relevant technique. Indeed, for the same formulation, several technologies are available, with different operating parameters and characteristics, which may lead to various emulsion types: O/W, W/O or multiple ones.
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Read the articleAUTHORS
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Martine POUX: Research engineer, HDR - INPT/UPS/CNRS Chemical Engineering Laboratory, - École nationale supérieure des ingénieurs en arts chimiques et technologiques, Toulouse (INP-ENSIACET), France
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Jean-Paul CANSELIER: ENSCT engineer, doctor-engineer, state doctor, Pompertuzat, France
INTRODUCTION
In many industries (food, pharmaceuticals, cosmetics, but also chemicals), many of the products manufactured – whether intermediates or finished products – are in the form of emulsions. Bringing immiscible phases into contact to obtain a stable pseudo-homogenous product requires a certain amount of technological knowledge and know-how. Scaling up to large-scale production, based on the results of the development phase, often proves difficult: indeed, the phenomena involved in emulsion formation are numerous and complex, and linked to the type of technology used, so that for a given formulation and operating conditions, there is no single solution for obtaining a stable emulsion.
This article, which follows on from the one on emulsion formation mechanisms published in the same series
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KEYWORDS
high pressure | emulsion | homogenizer | rotor-stator | colloid mill
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Emulsification processes
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Mechanical agitation technology, colloidal mills :
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Data
Technical characteristics of various emulsification systems on the market
They are presented in Tables A and B.
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