A parametric study of laboratory scale manifacture of sodiumallysulfonate

Abstract

The main aim of this work involyes the manufacture of sodium allylsulfonate from allylbromide and sodium sulfite by using laboratory scale testing of the commonly used industrial batch method(1). Yield of sodium allylsulfonate by processing conditions were examined. Sodium allylsulfonate (SAS), is mainly used in nickel electroplating bath as a brightening and levelling agent . It improves the throwing power of thebath, thus; yielding deposits of high brightness and good adherence. At the same time, it possesses the other properties of brightening agents by being a rapid adsorber on the cathode withit subsequent incorporation into the electrodeposit. It has strong inhibition action on the discharge of nickel ions without significantly affecting the discharge of hydronium ion . SAS also possesses the ability to considerably decrease the Nickel current efficiency within crease in SAS concentration in the electrolyte. Sodiumallylsulfonate, besides the other unsaturated sulfonates, is an important copolymerizable emulsifying agent in copolymerization with larger proportions of acrylonitrile for the preparation of dyeable acrylic fibers with improved whiteness. Because of the molecular structure; having a double bond; a sulfonate group and low molecular weight, Sodiumallylsulfonate is the preferred copolymer among the other unsaturated sulfonates. The compound was synthesized by using a new reagent other than recommended in literature. Allylbromide was used instead of allylchloride and methanol was used as the solvent in the reaction mixture. The analysis of the samples obtained from experiments, showed the identical properties with the commerciallyl used sample synthesized by allylchloride as the primary reagent. A number of experiments were carried out based on the same procedure but with different experimental reaction parameters . Physical and chemical tests were carried out on the products obtained . A process was then chosen to optimize the cost and ease of manufacture with the optimum results. The repetition of the experiments at the selected reaction conditions were examined, and it was found that at 44 and 180 minutes of reaction time the best yield and quality of SAS samples were obtained.