Process for cooling a polymerization reactor
AssigneeChemische Werke Huls Aktiengesellschaft
InventorsEberhard Sistig, Karl-Heinz Reinermann
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Abstract
A process for cooling a polymerization reaction of compounds in a dispersion and/or solution involves evaporation of one or more liquids contained in the dispersion and/or solution, condensation of the vapors in a reflux condenser, and recycling of the thus-condensed vapors into the reactor, together with the use of a controllable flow of coolant which is introduced into the reflux condenser jacket. In this process the amount of heat given off during condensation serves as the control variable for a controller for controlling the input of cooling medium for the reflux condenser.
Claims11
In a process for cooling a polymerization reaction of compounds in a dispersion and/or solution with a polymerization reactor equipped with a reflux condenser, wherein the cooling is executed by evaporation of one or more liquids contained in the dispersion and/or solution, by condensation of vapors in the reflux condenser, and by recycling of the thus-condensed vapors into the reactor, and by cooling of the reactor with a controllable flow of coolant the improvement wherein a portion of said coolant is passed through said reflux condenser and the amount of heat given off during condensation in said reflux condenser provides the control variable for a controller for controlling the amount of coolant fed into the reflux condenser.
A polymerization apparatus for conducting a polymerization reaction which comprises a polymerization reactor operatively associated with a reflux condenser, said reactor including a cooling jacket for cooling the contents of the reactor and conduit means for circulating a coolant through said cooling jacket and said reflux condenser including a cooling jacket means for cooling vapors to be condensed in a condensation chamber of the reflux condenser and means for circulating a coolant through said cooling jacket means of said reflux condenser, at least one temperature sensing means located within the coolant passing through the jacket means of said reflux condenser and a controller including control circuit means operatively associated with said at least one temperature sensing means for controlling the circulation of coolant through said reflux condenser.
A process for controlling the cooling capacity of a reflux condenser operatively associated with a polymerization reactor wherein compounds in dispersion and/or solution are subjected to polymerization reactions, which comprises passing a liquid coolant through a portion of said reflux condenser to effect cooling of vapors passing through said reflux condenser from said reactor, disposing at least two temperature sensing means within the cooling passing within said reflux condenser, said sensing means being arranged at different positions one behind the other in series in a direction of flow of the coolant through said reflux condenser, measuring the temperatures of the coolant at said different positions with said sensing means, averaging the measured temperatures, feeding the averaged value of said temperatures to a controller and regulating the flow of coolant through said portion of said reflux condenser with said controller.
Dependencies are inferred from the claim text.