Sms Siemag Aktiengesellschaft

Sms Group Process Technologies Gmbh

Sms Group Gmbh

Cmi Uvk Gmbh

Sms Siemag Process Technologies Gmbh

Herbert Weissenbaeck

Nobuyoshi Takahashi

Dieter Vogl

Benedikt Nowak

Osama Taki

Markus ÖSterreicher

Raffael Stastny

David Konlechner

Johannes Pamminger

Matthias Bartel

Michaela Mach

The present invention relates to a process for the separation of vanadium in the form of vanadium oxide, iron-vanadium-oxide, or iron-vanadium from solutions containing both dissolved iron and dissolved vanadium, wherein an aqueous solution containing dissolved iron and vanadium in a molar iron-to-vanadium ratio of above 1:1, preferably above 1:1 and up to 10000:1, more preferably between 5:1 and 1000:1, even more preferably between 5:1 and 100:1, and most preferably between 10:1 and 50:1 and optionally also other elements is oxidized in an oxidation step with a gaseous oxidation media, and wherein the amount of acid in the aqueous solution is kept below the stoichiometric amount of acid required during bivalent iron oxidation and the precipitate thus formed is removed from the solution.

Process for the separation of vanadium

A method of processing waste iron chloride solution including ferrous chloride, ferric chloride or mixtures thereof and optionally free hydrochloric acid, includes concentrating waste iron chloride solution into concentrated liquid having iron chloride concentration of at least 30%-40% by weight; optionally oxidizing ferrous chloride in the concentrated liquid from the concentration step to ferric chloride providing liquid containing ferric chloride; hydrolyzing the liquid containing ferric chloride from the oxidation step at 155-350&#xb0; C., maintaining the ferric chloride concentration at least at 65% by weight, generating steam containing hydrogen chloride and liquid containing ferric oxide; separating ferric oxide from the liquid containing ferric oxide in the hydrolysis step; condensing steam containing hydrogen chloride in the hydrolysis step, recovering hydrochloric acid at a concentration of at least 10%-15% by weight; and using condensation energy of the hydrogen chloride containing steam in the recovery step to heat the concentration step performed under reduced pressure.

Processing method for recovering iron oxide and hydrochloric acid

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Vienna, Austria

Herbert Weissenbaeck