Norilsk Nickel Finland Oy

Outotec (finland) Oy

Northvolt Ab

Paroc Oy Ab

Norilsk Nickel Harjavalta Oy

Metal Trade Overseas Ag

Piimat Oy

Betoniluoma Oy

Rauno Luoma

Henri K Virtanen

Lauri Nordlund

Ville Nieminen

Esa Lindell

Heikki Aaltonen

Arja Oja

Matti Hyttinen

Jukka SEVÓN

Noora Kaakkolammi

Harri Vanhatalo

Jouni Unkuri

Tom Niemi

Cornelia Lantto

Tuomo Laukkanen

Pekka Tynjälä

Ulla Lassi

Pekka Alisaari

A method is provided for separating the impurities zinc, iron, calcium, copper and/or manganese from an aqueous solution that contains cobalt and nickel. The solution is brought into a mixing contact with an extraction solution, which is pre-loaded with cobalt and nickel ions, whereby the cobalt and nickel in the extraction solution are replaced with the impurity metals, and the aqueous solution is cleaned from impurities after this phase. This purified aqueous solution, raffinate, can be used to pre-charge the extraction solution so that a minor part of the raffinate is contacted with a pre-neutralized extraction solution, whereby the cobalt and nickel replace the alkali metal, alkali earth metal or ammonium ion that is used in the pre-neutralization.

Method for separating zinc, iron, calcium, copper and manganese from the aqueous solutions of cobalt and/or nickel

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Pori, Finland

Rauno Luoma