Determination of ACH, Free HCN, DEA, Water, Acidity, SO₂ and Acetone in ACH Process

Acetone cyanohydrin (ACH) is an organic compound used in the production of methyl methacrylate, the monomer of the transparent plastic polymethyl methacrylate (PMMA), also known as acrylic. ACH process consists of three different stages called reactor, crude, and pure product. In this application note, ABB Analytical Measurements assesses the feasibility of determination following chemical properties in the three different process stages by FT-NIR to provide real-time feedback and optimize the process. Those properties are ACH, free HCN, and diethyl amine (DEA) in reactor, water and SO₂ in crude, and acetone, acidity, water and phenothiazine (PTZ) in pure product.