I would like to ask how the waste gases generated after the chlorination of toluene (hydrogen chloride, residual chlorine) are treated?
Thread Content
We deal with benzyl trichloride; when chlorine is introduced into toluene, waste gases are generated (hydrogen chloride and residual chlorine). Chlorine is introduced into both the main reactor and a secondary reactor, with the secondary reactor absorbing some of the chlorine that cannot be absorbed by the main reactor. However, it is not possible to absorb all of this chlorine completely during production. Most of the hydrogen chloride is absorbed by water to form salt acids, while the remaining gases (hydrogen chloride and chlorine) are sent through fans to an alkaline spray tower filled with diluent solution before being released into the atmosphere. Now the problem is that without adding lye, the water will quickly become acidic, and as it cannot be absorbed, chlorine odor is emitted in large quantities into the air ； And when liquid alkali is added, the remaining chlorine gas reacts with the diluted liquid alkali to form a sodium hypochlorite solution; this also has a strong chlorine odor. It’s really frustrating. I wonder how others deal with this situation? ?
Is the temperature high? If it’s not high, it can be sent directly through an alkali washing tower; the concentration of the NaOH solution should be maintained at a certain level using a dosing pump. If the concentration is too high, then an RTO device must be used for treatment
Is the temperature high? If it’s not high, it can be sent directly through an alkali washing tower; the concentration of the NaOH solution should be maintained at a certain level using a dosing pump. If the concentration is too high, then an RTO device must be used for treatment
:) It’s not difficult; there are ways to deal with it. The key issue remains the operating costs
Try to minimize chlorine consumption; there’s no need to overemphasize the use of forced chlorine injection
Can I get in touch with you? I have a question and would like to ask you for advice
A proper alkali cleaning treatment can completely resolve the issue.
Absorption by the absorption tower should be able to solve the problem