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Emulsion copolymerisation in a flexible continuously operated reactor

โœ Scribed by F.H.A.M. van den Boomen; J. Meuldijk; D. Thoenes

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
206 KB
Volume
54
Category
Article
ISSN
0009-2509

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โœฆ Synopsis

The performance of a pulsed packed column (PPC) has been investigated for the continuous seeded emulsion copolymerisation of styrene and methyl acrylate. In the PPC, intensive radial mixing is combined with little axial mixing. Intensive local mixing provides proper emulsi"cation and high rates of heat transfer to the reactor wall. It has been demonstrated that the performance of the PPC in terms of conversion and intermolecular chemical composition distribution approximates that of a batch process even for high pulsation velocities. Copolymers with a narrow composition distribution can be produced in the PPC by feeding the more reactive monomer styrene to the reactor contents at some axial positions in the column. Feed streams to adjust the monomer composition in the reacting particles have been calculated with a comprehensive multimonomer mechanistic emulsion polymerisation model. The results of this work indicate that a wide variety of latex products can be produced in the PPC with stable operation and a high conversion.

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