We simulate a pattern recognition device constructed from mass-coupled chemical reactors. Each reactor is an open system containing a bistable (iodate-arsenous acid) reaction. We store arbitrary patterns of high and low iodide concentrations in the network using a Hebb type rule. When the network is initialized with a pattern which is similar to a stored pattern, errors in the initial pattern are corrected and the similar stored pattern is recalled. When the network is initialized with a pattern which is not similar to a stored pattern, the network evolves to a homogeneous state which signals nonrecognition. The network is a programmable parallel computational device.