Dried with concentrated sulfuric acid
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We use concentrated sulfuric acid to dry hydrogen chloride gas – at what point does the concentrated sulfuric acid become ineffective? How should wet sulfuric acid be handled? If distillation is required, what temperature is needed and what material should the equipment be made of?
It would be better if there is a phosphate fertilizer plant nearby; the acid with a 65% concentration can be fed directly into the mixing reaction tank without the need for further preparation.
We use 98% concentrated sulfuric acid here to dry hydrogen chloride gas in three stages; the sulfuric acid after absorbing water becomes 95% concentration, that is, dilute sulfuric acid, which is then suitable for use in the next unit, so distillation is not necessary. If sulfuric acid is used for drying on an LZ, the corresponding supporting facilities also need to be provided.
Drying seems like a poor idea; after all, how much does sulfuric acid cost per ton these days? It’s better to treat it as waste weak acid or sell it instead
95% sulfuric acid is not dilute sulfuric acid, and it can also be used for drying. It is recommended to use 98% sulfuric acid; after absorption, it can be turned into 93% sulfuric acid which can then be sold as a product, provided that it is not contaminated by other substances. This post was last edited by limingshuguang on 2009-4-28 11:47.]
If logistics are well-developed, it is possible to proceed in this way, avoiding a lot of hassle. But a decrease from 98% to 93% likely means a higher acid level – should we build a larger storage tank for concentrated acid?
The acid concentration should be kept between 93-96% as much as possible
This sulfuric acid is easy to treat; after treatment, sulfuric acid with a concentration of about 97% can be recovered, along with hydrochloric acid at a certain concentration. The 97% concentrated sulfuric acid can be reused in the original purification process. We have a successful track record in dealing with this type of acid. For technical support, call 13898275109