Patent ID: 6498219
Filing Date: 2002-12-24
Classification: B01J,C08F

Abstract:
A method of on-line monitoring and control of monomer conversion in emulsion polymerization in a reactor, which comprisesa) selecting an initialization time t0=0 and assigning a particular original heat content Q0 to the reactor for this point in time, b) as from the initialization time, continuously determining the heat QIN, introduced into the reactor, the reaction enthalpy QRE introduced and the heat QOUT removed from the reactor, c) calculating the heat which has not been removed QAD according to the following balance QAD(t)=Q0+QIN(t)+QRE(t)âˆ’QOUT(t), d) calculating the maximum internal temperature TAD which occurs in the case of a spontaneous adiabatic reaction from the heat which has not been removed QAD(t) and the instantaneous internal temperature T(t) of the reactor and, e) if the calculated maximum internal temperature TAD exceeds the instantaneous internal temperature T(t) of the reactor by a particular margin, implementing measures which prevent a further rise in the heat which is not removed QAD.