PREPARATION OF SODIUM SULFIDE COMPOSITION FOR POLYMER AND PREPARATION OF POLYMER

摘要

PURPOSE:To prepare a sodium sulfide composition which can be efficiently dehydrated at a relatively low temp. and causes hardly the corrosion of a reactor by bringing a specified metallic salt such as a metallic salt of an org. sulfonic acid into contact with sodium sulfide hydrate in the presence of an aromatic polyhalo-compound. CONSTITUTION:At least one kind of metallic salt selected among metallic salts of org. sulfonic acids such as benzenesulfonic acid, lithium halides such as lithium chloride, metallic salts of org. carboxylic acids such as sodium acetate and alkali metallic salts of phosphoric acid such as trisodium phosphate is brought into contact with sodium sulfide hydrate in the presence of an aromatic polyhalo-compound such as p-dichlorobenzene. The sodium sulfide hydrate contains >=1mol water of crystallization per 1mol sodium sulfide and <=81% purity of Na2S. It includes sodium sulfide enneahydrate. The amount of the polyhalo- compound used is >= about 0.2mol per 1mol sodium sulfide, and the amount of the metallic salt added is about 0.01-6pts.wt. per 1pt. sodium sulfide.