phosphates

2020-12-29 13:44

      Phosphates are one of the natural components of almost all foods and are widely used in food processing as important food ingredients and functional additives.

  Naturally occurring phosphates are phosphate ores (containing calcium phosphate), which can be produced by reacting sulfuric acid with phosphate ores to produce calcium dihydrogen phosphate and calcium sulfate that can be absorbed by plants. Phosphates can be divided into orthophosphates and condensed phosphates: phosphates used in food processing are usually sodium salt, calcium salt, potassium salt, and iron and zinc salts as nutritional enhancers, there are more than thirty varieties of commonly used food-grade phosphates, sodium phosphate salt is the main type of food phosphate consumption in the domestic market, and with the development of food processing technology, the consumption of potassium phosphate salt is also rising year by year.

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The main form of phosphate

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Preparation of phosphoric acid

Phosphoric acid is a basic chemical raw material, widely used in phosphate, fertilizer, food additives, feed, washing, electronics, flame retardants and other industries. Pure phosphoric acid is colorless crystals with a melting point of 42.3 degrees Celsius, a high boiling point acid, easily soluble in water. Phosphoric acid is a strong acid in ternary, step-by-step ionization, non-volatile, not easy to decompose, almost no oxidation. It has the generality of acid. Industry commonly used concentrated sulfuric acid and calcium phosphate reaction to produce phosphoric acid, filtered off slightly soluble in water calcium sulfate precipitate, the resulting filtrate is phosphoric acid solution.


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