Additive for increasing early activity index of nickel slag and preparation method thereof
申请人:Beijing University of Technology
公开号:US11142481B2
公开(公告)日:2021-10-12
An additive for increasing an early activity index of nickel slag and a preparation method thereof, belonging to the field of additive technologies, are provided. The preparation method includes: successively adding maleic anhydride and triethanolamine to a reactor; setting the heating temperature to 50° C. for reaction, where a large amount of heat is released during the reaction; when the reaction temperature decreases to 60° C. after heat is released in the reaction, allowing triethanolamine maleate to react with a solution of bromine in carbon tetrachloride; adding water to the mixture, where the weight percentage content of the added water is 60%; separating and removing carbon tetrachloride from water; and conducting uniform stirring to obtain the additive. A molar ratio of the maleic anhydride, the triethanolamine, and bromine is (0.2-1):1:(0.2-1), and a molar ratio of the maleic anhydride to the bromine is 1:1.
本发明提供了一种提高镍渣早期活性指数的添加剂及其制备方法,属于添加剂技术领域。该制备方法包括:在反应器中依次加入马来酸酐和三乙醇胺;将加热温度设置为 50℃进行反应,反应过程中会释放大量热量;当反应温度降低至 60℃时,在反应过程中释放热量后,让马来酸三乙醇胺在反应器中进行反应。在反应放热后,让马来酸三乙醇胺与溴在四氯化碳中的溶液反应;向混合物中加水,其中加水的重量百分比含量为 60%;分离并除去水中的四氯化碳;均匀搅拌,得到添加剂。马来酸酐、三乙醇胺和溴的摩尔比为(0.2-1):1:(0.2-1),马来酸酐与溴的摩尔比为 1:1。