Sodium citrate is a white cubic crystal or granular powder, odorless, cool, salty and slightly spicy. Sodium citrate is non-toxic, has pH adjustment properties and good stability, so it can be used in the food industry.
A preparation method of sodium citrate is as follows:
Dissolve citric acid in water and then add ion membrane liquid sodium hydroxide to react. Control the reaction temperature at 50°C and the end-point pH value at 7;
Directional reaction Add glucose to the liquid, and the amount of glucose added is 5 times the mass content of sodium chlorate contained in the raw material ion membrane liquid sodium hydroxide;
Add glucose The reaction solution is kept at 80°C for more than 3 hours; the resulting solution is filtered, evaporated under reduced pressure, concentrated and crystallized; the resulting sodium citrate crystals are centrifuged, and the crystals are washed with water, and the resulting crystals are dried in a fluidized bed to obtain the finished product of sodium citrate.
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