MAGNESIA CEMENT AND METHOD OF PRODUCTION THEREOF Russian patent published in 2009 - IPC C04B9/04 C01F5/40 

FIELD: chemistry.

SUBSTANCE: invention refers to magnesia cements and can be used for building material production, including organic concrete. For production of magnesia cement, synthetic magnesium sulphate MgSO₄·7H₂O is prepared by chemical interaction of aqueous suspension of fine magnesite MgCO₃ or caustic magnesite MgO taken in ratio solid:liquid=1:1, with sulphuric acid of density at least 1.6 g/cm³ until liquid phase of suspension is completely neutralised to pH-7, followed by MgSO₄·7H₂O evaporation and crystallisation. Produced magnesium sulphate is mixed with caustic magnesite in ratio, wt %: caustic magnesite - 66-72, specified magnesium sulphate - 28-34.

EFFECT: development of magnesia cement representing dry mixed components characterised by unlimited storability, transportability and usable immediately after mixing.

2 cl, 2 tbl, 2 ex