Manufacture of a β-Hydroxyester via a Continuous Reformatsky Process

The use of continuous processing in a Reformatsky reaction has been investigated as a means to control the large heat of reaction and reduce the inventory of hazardous materials. A laboratory-scale continuous miniplant for manufacture of an aromatic β-hydroxyester has been designed and built for a production rate of about 100 mL/h. The plant operated at steady state for several hours and provided strong evidence that a larger-scale continuous plant could readily be designed. For this chemistry, the use of continuous processing is not only a safer and more efficient technology (as compared to the typical batch process) but also cleaner, giving fewer byproduct and at much lower concentration.