| 摘要 |
1,151,869. Ion-exchange. UNION CARBIDE CORP. 27 May, 1966 [27 May, 1965], No. 23770/66. Addition to 1,024,670. Heading B1J. The process of the parent Specification is modified by using different ratios of resins in the mixed beds and/or adjusting the pH of the liquid in equilibrium with the bed before regeneration by addition of acid or alkali. |
