| 摘要 |
A process for commercially producing sulfates useful in the water treatment and papermaking industries from by-product aluminum oxides is taught. The process comprises feeding the aluminum oxide by-product and weak process liquor into digester vessel to form a slurry which is then heated. Sulfuric acid and additional oxide feed is added into the slurry mixture allowing the reaction to go to completion. Specific variables such as temperature, pH, reactant concentrations, reaction times and process liquor recycle are controlled to substantially eliminate certain heavy metals in any form whatsoever from contaminating the final sulfate product.
|
