Free flowing sodium nitrite and method of production

A method (200) of obtaining a free-flowing spherical or oval shaped sodium nitrite, wherein the method comprises:

• optimizing (202), a concentration of sodium nitrite slurry to a predefined value concentration and specific gravity using a slurry settler unit (102);
• transferring (204), a concentrated sodium nitrite slurry from the slurry settler unit (102) to a crystallizer (108A and 108B);
• heating (206), the Crystallizer (108A and 108B), comprising slurry mass of sodium nitrite to a predefined temperature under stirring at predefined stirrer speed and a predefined tip speed for a predefined period of time;
• cooling (208), gradually the slurry mass of sodium nitrite up to a predefined temperature and reducing stirrer speed to a predefined value after completing a cooling cycle;
• filtering (210), the wet mass of SNI through centrifuge (110) at a predefined temperature between 45° C.-40° C.;
• drying (212), the filtered mass of sodium nitrite at a temperature of 100° C.-130° C. for 30-120 minutes using a drying unit (112) to obtain a dried mass of sodium nitrite;
• and
• sieving (214), the dried mass of sodium nitrite to obtain a free flowing sodium nitrite comprising a spherical or oval shaped granules with moisture content less than 0.15%.