Sulfuric acid cleaned acetylene
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Which parameters need to be controlled when using sulfuric acid to purify acetylene? Is the darkening of used sulfuric acid caused by the carbonization of acetylene?
It is necessary to control parameters such as acetylene moisture content, sulfuric acid concentration, and sulfuric acid temperature; the blackening of waste sulfuric acid is caused not only by carbon black (primarily carbon black) but also by other complex components.
I don’t think so. We use sodium hypochlorite for purification, mainly to remove impurities such as sulfur and phosphorus present in acetylene; the dark color is probably due to an excess of sulfur You use sulfuric acid for cleaning; we haven’t used it before. Is it based on the same principle as sodium hypochlorite?
After using it for a year, we switched back to hyposodium. . . . . . It’s simply unusable, and the cost is high as well
The waste sulfuric acid we produce is also black
If the various control parameters for sulfuric acid cleaning are not properly managed, acetylene carbonization will occur, and the waste acid discharged will turn black.
How is the purified waste acid disposed of?
Reply to 5# xbaidj: How could this happen? Could you share the specific reason?
Even if sulfuric acid contains too much sulfur, it should not appear black since sulfur is yellow in color
The main things to control are the moisture content of acetylene, as well as the temperature of the concentrated sulfuric acid cooler. Additionally, it is important to regulate the flow rate of the circulating dilute sulfuric acid and the temperature of the cooler; otherwise, high temperatures can occur in the bubble column section of the sulfuric acid purification tower, which can ultimately lead to damage to the tower.