| 摘要 |
A process is disclosed for washing sulfonated cation exchange resin beads to remove sulfuric acid therefrom, in which successive discrete amounts of aqueous sulfuric acid of decreasing concentration and finally a discrete amount of water are passed downwardly through a bed comprising sulfonated cation exchange resin beads and concentrated sulfuric acid. The amount of waste sulfuric acid from this process is eliminated or substantially reduced when compared to the known stirred-reactor, batch-type process which uses large amounts of sulfuric acid of decreasing concentration and finally a large amount of water. |
