| 摘要 |
<p>A process for removing, by absorption, sulfur dioxide from a gaseous mixture such as a flue gas by scrubbing said mixture with an aqueous scrubbing solution containing an alkaline reagent such as sodium carbonate. The solution also has dissolved in it a quantity of silica which tends to precipitate when the pH of the solution is lowered by the absorption of the sulfur dioxide. The silica precipitated in this manner tends to form rock like deposits in the scrubbing device and associated equipment. If a water soluble basic salt of aluminum, such as sodium aluminate is added to the scrubbing solution prior to its use in the process, an aluminosilicate precipitate is formed which has a minimum deleterious effect.</p> |
