Are there relatively mature HCl gas recovery systems there?
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Recently, a new project at our factory encountered objections from experts during the environmental impact assessment: the project primarily involves the generation of HCl, with triethylamine being used as a binding agent; in subsequent steps, NaOH solution is added for neutralization (the NaOH solution also serves to extract the reaction products). It’s possible that triethylamine also acts as a solvent or catalyst, but the joint venture company, being a private enterprise, may have chosen to keep this information confidential and not disclose it to us in full. Environmental assessment experts believe that using triethylamine merely to bind HCl is unnecessary, uneconomical, unsafe, and harmful to the environment; a simple device for recovering HCl would suffice. . . Regardless of what other functions triethylamine may have, what are the practical and cost-effective methods for simply recovering HCl? I’ve heard of it but never seen it; we don’t come into contact with it very often in our industry. Could any expert provide some information on it? It would be great if the details could be thorough. Thank you in advance! Explanation: The device is relatively simple and the production scale is small; therefore, the recycling device needs to be economical and straightforward. Last edited by Pseudo Xiao Bao on 2009-2-4 21:39.]
Use an absorption tower to absorb hydrogen chloride gas, and then hydrochloric acid is produced for sale – it’s a very simple process that is also well-established. We have done many. There are both single-tower absorption and multi-tower absorption options; it depends on the volume of your gas.
Adsorption, separation and purification after freezing, then for external use
30wt% hydrochloric acid can be produced for export as a by-product. A simple absorption tower will do; it’s very cheap
After being absorbed by a graphite absorber, it is made into 31% hydrochloric acid for sale