A preparation of lead thiocyanate

Article abstract of DOI:10.1007/BF02571834

A new and improved method for the preparation of a pure and stable lead thiocyanate in practically theoretical yield has been described. A comprehensive investigation of other published methods has been reported and preparations of lead thiocyanate made by these methods have been compared with the improved compound and various commercial products. All of the products were assayed for purity on the basis of their chemical analyses and tests were made of their capacity for saturating double bonds in cottonseed, peanut, and soybean oils. The lead thiocyanate prepared according to the recommended procedure was found superior to all the other products in stability, purity, and ability to produce dependable and reproducible thiocyanogen values. It has been demonstrated that the ratio of lead ions to thiocyanogen ions and the order of addition of these ions to each other are of major importance in the preparation of pure lead thiocyanate.