Extraction process of 1, 5-pentanediamine, obtained 1, 5-pentanediamine product and polyamide

The invention provides an extraction process of 1, 5-pentanediamine, an obtained 1, 5-pentanediamine product and polyamide.The method comprises the following steps that a first solution is provided, and the first solution comprises 1, 5-pentanediamine and water; performing extraction treatment on the first solution through an organic solvent to obtain a first aqueous solution and a first organic solution; the first organic solution is subjected to back extraction through a second extraction agent, and a second aqueous solution and a second organic solution are obtained; recovering 1, 5-pentanediamine from the second aqueous solution; the second extraction agent comprises but is not limited to water and an alkaline aqueous solution. According to the method, 1, 5-pentanediamine containing impurities is extracted through an organic solvent, and then 1, 5-pentanediamine is subjected to back extraction through a back extraction system, so that separation of the impurities and the pentanediamine is achieved. 本发明提供了