A method for producing a diamine includes purifying a diamine from an aqueous solution containing a diamine salt by adding an alkaline substance to the aqueous solution and then filtering the resulting solution by allowing the solution to pass through a nanofiltration membrane to remove the salt, thereby obtaining an aqueous diamine solution.
一种制备二胺的方法,包括将碱性物质加入含有二胺盐的
水溶液中,然后通过让溶液通过纳滤膜进行过滤,以去除盐分,从而从
水溶液中纯化出二胺,得到
水溶性二胺溶液。