离子交换法作为稀土生产技术并未过时,它有东山再起的可能。其理由是:①稀土市场扩大,就一部分厂商所具规模来说,即使用离子交换法分离全部稀土,也能保持供需平衡。②利用新开发的树脂,离子交换速度快,能于短时间内分离精制稀土。③能处理浓度比目前高的溶液,生产率提高。据报导,日本旭化成公司在分离研究铀同位素时,开发了一种交换速度比迄今为止的离子交换树脂快2～3个数量级的树脂, Ion exchange method as a rare earth production technology is not out of date, it may be a comeback. The reasons for this are as follows: ① As the market for rare earths expands, as far as the scale of some manufacturers is concerned, even if all the rare earths are separated by ion exchange method, the balance between supply and demand can be maintained. ② the use of newly developed resins, ion exchange speed, can be separated and refined rare earth in a short time. ③ can handle the concentration higher than the current solution, productivity increased. It is reported that Asahi Kasei Corporation of Japan in the separation of uranium isotopes, the development of an exchange rate so far ion exchange resin faster than 2 to 3 orders of magnitude of resin,