Chemistry: physical processes – Physical processes – Crystallization
Patent
1977-01-27
1978-05-09
Scovronek, Joseph
Chemistry: physical processes
Physical processes
Crystallization
23253R, 73190R, G01K 1700, G01N 2520
Patent
active
040884473
ABSTRACT:
A novel adiabatic reaction calorimeter useful for measuring the energy change in a chemical reaction is disclosed. In a specific application, the calorimeter is used to measure the heat energy derived in a chemical reaction. The device includes a reaction vessel which is thermally isolated in the geometric center of a sealed spherical chamber. The chamber, which is filled with a gas atmosphere, is defined within a box structure fabricated of a ceramic foam or plastic foam. An auxiliary vessel is positioned in the chamber adjacent to the reaction vessel and is connected to the reaction vessel by a transfer conduit.
In a typical operation, prior to initiating the reaction, one reactant is contained in the reaction vessel and another reactant in the auxiliary vessel. The vessels and the gas atmosphere are heated to a predetermined temperature by electrical power units, with regulation by a temperature control unit. When a desired temperature is reached the reactant in the auxiliary vessel is released into the reaction vessel to initiate the reaction. During the reaction the reaction mixture is continuously stirred in the reaction vessel and the gas atmosphere is circulated in a symmetrical pattern within the chamber. The actual change in temperature which the reaction vessel undergoes during the reaction, together with an electrical calibration of the vessel enables measurement of the energy change.
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Clausen V. Dean
Scovronek Joseph
The Dow Chemical Company
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