反应详情

In a large beaker, add naphthionic acid sodium salt and water and stir to complete solution, pH=9.2-9.4. Slowly add hydrochloric acid, and white precipitation occurs at pH=2.2-2.4. Stir the slurry for at least 4 hours, then filter the slurry. Use the wetcake in Stage 2.

1. customSlowly add hydrochloric acid, and white precipitation
2. stirringStir the slurry for at least 4 hours
3. filtrationfilter the slurry