Process for producing polymers

摘要

A process for preparation of a polymer product comprising the steps of i) feeding an aqueous mixture comprising a monoethylenically unsaturated monomer or a mixture of monoethylenically unsaturated monomers into a first reactor device (2) through at least one inlet; ii) partially polymerising the monomer or monomers and transferring the polymerising monomer or mixture of monomers from the inlet to an outlet (3) of the first reactor device (2) to provide a partially polymerised product; iii) flowing the partially polymerised product out of the outlet (3), in which no more than 60% of the monomer or mixture of monomers has been polymerised in the partially polymerised product as it exits the outlet (3) of first reactor device (2), and transferring it to a further reactor device (5), in which the further reactor device (5) has an inlet and an outlet (6); iv) continuing the polymerisation in the further reactor device (5) and removing the polymer product from the outlet (6) of the further reactor device (5), characterised in that the first reactor device (2) comprises a positive displacement pump.

主权项

1. A process for preparing a polymer product, the process comprising:
i) feeding an aqueous mixture comprising a monoethylenically unsaturated monomer or a mixture of monoethylenically unsaturated monomers into a first reactor through at least one inlet; ii) partially polymerising the monomer or monomers and transferring the polymerising monomer or mixture of monomers from the inlet to an outlet of the first reactor to provide a partially polymerised product; iii) flowing the partially polymerised product out of the outlet, in which no more than 60% of the monomer or mixture of monomers has been polymerised in the partially polymerised product as it exits the outlet of first reactor, and transferring it to a further reactor, in which the further reactor has a further reactor inlet and a further reactor outlet; and iv) continuing the polymerisation in the further reactor and removing a polymer product from the outlet of the further reactor, wherein: the first reactor comprises a positive displacement pump and the first reactor further comprises a rotor within a stator and a multiplicity of cavities formed between the rotor and the stator in which the monomer or mixture of monomers enters and within which it is transferred as partially polymerising monomer or monomers from the inlet to the outlet of the first reactor.