PL412702A1 - Method for obtaining magnesium and gypsum hydroxide from solutions of magnesium sulfate and roasted dolomite - Google Patents

Method for obtaining magnesium and gypsum hydroxide from solutions of magnesium sulfate and roasted dolomite

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Publication number
PL412702A1
PL412702A1 PL412702A PL41270215A PL412702A1 PL 412702 A1 PL412702 A1 PL 412702A1 PL 412702 A PL412702 A PL 412702A PL 41270215 A PL41270215 A PL 41270215A PL 412702 A1 PL412702 A1 PL 412702A1
Authority
PL
Poland
Prior art keywords
magnesium
gypsum
solution
aqueous
hydroxide
Prior art date
Application number
PL412702A
Other languages
Polish (pl)
Other versions
PL238387B1 (en
Inventor
Jacek Szczerba
Wiesław Wantuch
Leszek Urbańczyk
Jerzy Lis
Marcin Figura
Mirosław Bućko
Dominika Madej
Maria Majka-Wantuch
Henryka Szczerba
Michał Ochman
Original Assignee
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Zakłady Magnezytowe ROPCZYCE Spółka Akcyjna
Alwernia Spółka Akcyjna
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie, Zakłady Magnezytowe ROPCZYCE Spółka Akcyjna, Alwernia Spółka Akcyjna filed Critical Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Priority to PL412702A priority Critical patent/PL238387B1/en
Publication of PL412702A1 publication Critical patent/PL412702A1/en
Publication of PL238387B1 publication Critical patent/PL238387B1/en

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  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Sposób otrzymywania wodorotlenku magnezu i gipsu z roztworów siarczanu magnezu i prażonego dolomitu charakteryzuje się tym, że wodny roztwór siarczanu magnezu o stężeniu 25 - 35% masowych połączony z wodnym roztworem azotanu wapnia o stężeniu 1 - 15% masowych miesza przez okres 30 - 180 minut. Uzyskaną zawiesinę gipsu w wodnym roztworze azotanu magnezu filtruje się, a otrzymany osad gipsu korzystnie poddaje się przemywaniu. Do otrzymanego filtratu w postaci wodnego roztworu azotanu magnezu wprowadza się zawiesinę wodorotlenków wapnia i magnezu, otrzymaną w procesie gaszenia prażonego dolomitu, zawierającą 90 do 100% masowych stechiometrycznej ilości tlenku wapnia, w przeliczeniu na zawarty w roztworze azotanu magnezu kation magnezowy, przy czym reagenty poddaje się mieszaniu przez okres 60 do 240 minut. Otrzymaną zawiesinę wodorotlenku magnezu w wodnym roztworze azotanu wapnia filtruje się w temperaturze 36 do 40°C, przemywa oddzielony wodorotlenek magnezu, a wodny roztwór azotanu wapnia zawraca się do początku procesu.The method of obtaining magnesium hydroxide and gypsum from solutions of magnesium sulfate and roasted dolomite is characterized by the fact that an aqueous solution of magnesium sulfate at a concentration of 25 - 35% by mass combined with an aqueous solution of calcium nitrate at a concentration of 1 - 15% by mass is mixed for a period of 30 - 180 minutes. The obtained gypsum suspension in an aqueous magnesium nitrate solution is filtered and the resulting gypsum precipitate is preferably subjected to washing. To the obtained filtrate in the form of an aqueous solution of magnesium nitrate, a suspension of calcium and magnesium hydroxides, obtained in the process of quenching dolomite, containing 90 to 100% by mass of stoichiometric amount of calcium oxide, calculated on the magnesium cation contained in the solution of magnesium nitrate, is introduced, whereby the reactants are subjected to mixing for 60 to 240 minutes. The resulting suspension of magnesium hydroxide in an aqueous calcium nitrate solution is filtered at a temperature of 36 to 40 ° C, the separated magnesium hydroxide is washed, and the aqueous calcium nitrate solution is recycled to the beginning of the process.

PL412702A 2015-06-12 2015-06-12 Method for obtaining magnesium and gypsum hydroxide from solutions of magnesium sulfate and roasted dolomite PL238387B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL412702A PL238387B1 (en) 2015-06-12 2015-06-12 Method for obtaining magnesium and gypsum hydroxide from solutions of magnesium sulfate and roasted dolomite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL412702A PL238387B1 (en) 2015-06-12 2015-06-12 Method for obtaining magnesium and gypsum hydroxide from solutions of magnesium sulfate and roasted dolomite

Publications (2)

Publication Number Publication Date
PL412702A1 true PL412702A1 (en) 2016-12-19
PL238387B1 PL238387B1 (en) 2021-08-16

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ID=57542462

Family Applications (1)

Application Number Title Priority Date Filing Date
PL412702A PL238387B1 (en) 2015-06-12 2015-06-12 Method for obtaining magnesium and gypsum hydroxide from solutions of magnesium sulfate and roasted dolomite

Country Status (1)

Country Link
PL (1) PL238387B1 (en)

Also Published As

Publication number Publication date
PL238387B1 (en) 2021-08-16

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