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

The invention provides an extraction method 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, metal ions and water; performing extraction treatment on the first solution through an organic solvent to obtain a first aqueous solution and a first organic solution, so that at least part of the metal ions in the first solution are extracted into the first organic solution; recovering 1, 5-pentanediamine from the first aqueous solution; wherein the organic solvent comprises a complexing extraction agent. Impurities such as pentamethylene diamine and metal ions are efficiently separated from a first solution system through complexing extraction, and a 1, 5-pentamethylene diamine product is further purified. 本发明提供了一种1,5-戊二胺的提取方法、所得的1,5-戊二胺产品及聚酰胺，该方法包括如下步骤：提供一第一溶液，所述第一溶液包含1,5-戊二胺、金属离子和水；通过有机溶剂对所述第一溶液进行萃取处理，得到第一水溶液和第一有机溶液，从而使所述第一溶液中的至少一部分所述金属离子被萃取到所述第一有机溶液中；自所述第一水