C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 2/22 (2006.01) C08F 2/01 (2006.01)
Patent
CA 2362511
The invention relates to a method for on-line monitoring and controlling the monomer conversion during emulsion polymerization. According to said method, a balance is continuously made, starting from an initialization point in time, of the heat amount Q IN fed to a reaction, the reaction enthalpy Q RE added by the supply with monomers and the amount of heat Q OUT dissipated from the reactor. A non-dissipated amount of heat Q AD is calculated on the basis of these values which in the case of a spontaneous adiabatic reaction would result in an increase in the internal temperature and the internal pressure of the reactor. A check is carried out whether the potential adiabatic temperatures and pressures are always within the predetermined upper limits. If said upper limits are exceeded, the addition of monomers to the reactor is slowed down or stopped.
Cette invention concerne un procédé de contrôle et de commande en ligne de la conversion de monomères lors de la polymérisation en émulsion. Selon ce procédé, on établit, à partir d'un point d'initialisation, le bilan en continu de la quantité de chaleur Q?IN? apportée à un réacteur, de l'enthalpie de réaction Q?RE? apportée par l'alimentation en monomères et de la quantité de chaleur Q?OUT? dissipée par le réacteur, puis on calcule une quantité de chaleur Q?AD? non dissipée qui conduirait, dans le cas d'une réaction spontanée adiabatique, à une augmentation de la température et de la pression internes du réacteur. On contrôle si les températures et les pressions apparaissant dans le milieu adiabatique restent toujours en-dessous de limites supérieures données. En cas de dépassement de ces limites, on réduit ou on interrompt l'alimentation en monomères.
Birk Joachim
Hauff Thomas
Klostermann Rainer
Kroner Hubertus
Basf Aktiengesellschaft
Robic
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