We study the stabilization problem of continuous-stirred-tank reactors controlled with the coolant temperature. It is assumed that reaction rates are unknown, such that uncertainties are associated with heat generation terms. We construct a dynamic feedback which is composed of a linearizing-like feedback and an uncertainty estimator, which is based on energy and mass balance equations. Both local and practical convergence of this control algorithm are proved when the uncertainty estimator satisfies a high-gain assumption. The performance of the controller is illustrated by means of a numerical example.