Disposal of waste sulfuric acid resulting from acetylene purification
Thread Content
Are there any companies that dispose of acetylene purification waste sulfuric acid in calcium carbide slag? Does this logic hold water? Can actual sulfuric acid and calcium hydroxide (calcium carbide slag) react to produce calcium sulfate (gypsum) and water?
Yes, there are many of them, but the conversion rate of the reactions is a problem; the conditions at the site are also poor, and the calcium sulfate produced cannot be used in cement production. This process is merely a temporary solution to meet environmental regulations. In the long run, it is still recommended to use the pyrolysis regeneration process to produce fresh acid.
It can be handled in this way, but the calcium sulfate produced is brown in color and cannot be further processed; cement plants also do not want it. Therefore, considering environmental concerns, a long-term plan is necessary.