Process for the production of aqueous hydrochloric acid having a concentration of at least 35.5 percent by weight
CA 1214021 A · Owner: Mobay Chemical Corporation · Inventors: Parigi, Joseph V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A CONCENTRATION OF AT LEAST 35.5% BY WEIGHT ABSTRACT OF THE DISCLOSURE, 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% …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.