Condensate of Naphthalene sulfonates and formaldehyde with differing metal ions was prepared by way of dowexing or alkali neutralization and experiments were carried out on its properties.

• 通过离子交换树脂法或碱中和的手段，制备出具有不同金属离子的萘磺酸甲醛缩合物盐类．并对其性能进行了实验研究。