摘要 |
<p>PROCESS FOR THE PRODUCTION OF AQUEOUS HYDROCHLORIC ACID HAVING A CONCENTRATION OF AT LEAST 35.5% BY WEIGHT The present invention is directed to a process for continuously producing aqueous hydrochloric acid having a concentration of at least 3.5% by weight comprising: (a) continuously introducing water to the top of an absorption unit, (b) continuously introducing a gas stream containing anhydrous hydrogen chloride to the bottom of said absorption unit, (c) removing an overhead gaseous stream from said unit, said gaseous stream containing no more than 3% by weight, and preferably no more than 1% by weight hydrogen chloride, and (d) removing a bottom liquid stream from said unit, said bottom stream containing at least 35.5% by weight hydrogen chloride, and (e) returning a portion of said bottom stream to said unit.</p> |