A Outline of Minamata Disease
5. A Model of Acetaldehyde Plant

A model of acetaldehyde plant (new fifth term) in which highest byproduction of methylmercury could be occurring: When acetaldehyde was made from acetylene and water, methylmercury was by-produced in the reaction chamber. Methylmercury contaminated into the vacuum evaporator, the first still, and even to the second still, and then, discharged with the drain from each equipment.