Food Grade Phosphoric Acid

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  • Product Name: Phosphoric Acid (85%)
  • Appearance: colorless, transparent thick liquid
  • Tech Grade: Food Grade
  • Main Uses: Sour agents, yeast nutrition, water retention agent, leavening agent, stabilizer, coagulant, anti-knot agent, etc…
  • CAS NO.: 7664-38-2
  • Molecular Formular: H3PO4
  • HS Code: 28092010

Food grade phosphoric acid is widely used in various types of food processing industries as food additive. So it has much higher requirements in quality and purity. Chemate, a professional manufacturer of various types of phosphorus chemicals with more than 15 years of production experience can provide customers with food grade phosphoric acid with less impurities and less metal content. If you have any need, please feel free to require us for more details, we will be your ideal choice.

Item Phosphoric Acid (Food Grade)
Test method FCC IV or gb3149-92
Phosphoric acid content % ≥ 75%/85%
Arsenic(As) content % ≤ 0.00005
Fluorine(F) content % ≤ 0.001
Chloride content(CI) % ≤ 0.0005
Heavy metal (Pb)content % ≤ 0.0005
Easily oxidized substances(H3PO3) % ≤ 0.012
Sulfate content % ≤ 0.005
Packing 20L or 200L plastic barrel, net weight 35Kg or 330Kg, 1650kg IBC tank

What Is Phosphoric Acid Uses In Food

Phosphoric acid uses in drinks. It has the performance of buffering, which can adjust the PH value, make the taste of drinks stable, play a certain antiseptic effect. In the fermentation drink, it can also play the role of yeast nutrients.
In food processing industries. Phosphoric acid food grade can be used as acidity regulator and nutrient agent for yeast, as well as used in flavors, canned food and light drinks. It can also be used as a nutrient source for yeast to prevent the reproduction of useless bacteria in wine brewery. It can be used to clean the sugar production equipment, for that it can have chemical reaction with sugar.
Used in medicine. Phosphoric acid is an important ingredient in the counter medications to combat nausea. Mixed with zinc powder and form zinc phosphates to be applied in dentistry.

  • Features
  • Production Process
  • Why Choose Us

Features of Food Grade Phosphoric Acid

It is in colorless, transparent or slightly light color thick liquid. It is odorless and tastes very sour. Phosphoric acid has the melting point of 42℃ and the boiling point of 261℃. It dehydrates gradually when it is heated. It belongs to RO-PO and the crystallization point is 21℃. Like other liquid crystallization, phosphate crystallization is physical changes rather than chemical changes. So its chemical property won’t change because of crystallization. It can be used normally as long as it is heated to melt.
Food grade phosphoric acid has the features of high concentration, high purity and high crystallinity. When the temperature is around 4℃ and the concentration is larger than 85%, the crystallinity will increase. If the chemical is accidentally mixed with crystalline phosphoric acid, the original phosphoric acid that hasn’t crystallized will be crystallized immediately and the phosphoric acid in storage container will be crystallized abnormally rapidly. After the phosphoric acid crystallizes, the upper phosphoric acid becomes dilute and the needle-like crystal pure phosphoric acid food grade is deposited in the lower part.

Food Grade Phosphoric Acid Manufacturing Process

Thermal Method
The production of food grade phosphoric acid is usually adopts thermal production process, which can produce the pure phosphoric acid with less metal and impurities. The process of thermal phosphoric acid mainly uses the yellow phosphorus produced by electrothermal process as raw material, then through combustion and hydration, and make phosphoric acid 85 food grade.

The Production Process of Hydrochloric Acid Method for Food Grade Phosphoric Acid

1.Preparation of raw materials. Pulverized ore-rich ore containing P2O5>5wt% as raw material, crushed to more than 20 mesh to form phosphate ore powder;
2.Acid hydrolysis. Under stirring conditions, the prepared phosphate rock powder is acid hydrolyzed with 15wt%~35wt% hydrochloric acid, and the molar ratio of hydrochloric acid is that the calcium in the phosphate rock powder is completely converted into hydrogen chloride required for calcium chloride 95%~110% of theoretical dosage, acid hydrolysis reaction time is 15~45 minutes.
3.Pre-doping. Add 6wt%~12wt% Na2S solution to the process liquid after acid hydrolysis, the amount of Na2S solution is 2% to 4% of the volume of the process liquid.
4.Filtration. Add flocculant to the process liquid after removing impurities to flocculate and precipitate, obtain the desired filtrate after filtration.
5.Extract iron removal. Extract the filtrate by extraction, the extractant is subjected to countercurrent extraction and composed of N235, isooctyl alcohol and kerosene. The ratio of the extractant to the filtrate is 1:1, the extraction temperature is 15 to 45°C, and the residual water phase is iron-removed dilute phosphoric acid.
6.Extraction. A mixed solvent of tributyl phosphate and kerosene is used as an extractant to perform at least ten-stage extraction of the iron-removing dilute phosphoric acid. The volume ratio of kerosene and tributyl phosphate is 1:1~2, and the extraction temperature is 15~45℃, phosphoric acid in the process liquid enters the organic phase after extraction. The impurities and free hydrochloric acid remain in the aqueous phase. The volume ratio of the aqueous phase and the extraction phase is 1:3 to 5.
7.Washing. The organic phase after extraction shall be washed by 10wt%~18wt% dilute phosphoric acid solution in at least five stages. During washing, the volume ratio of water phase and organic phase is 1:20-30.
8.Back extraction. Use 0.5wt%~1.5wt% dilute hydrochloric acid to extract the organic phase at least five levels. During the back-extraction, the ratio of water phase and organic phase is 1:10~15, and the water phase after back-extraction is dilute phosphoric acid.
9.Removal of impurities. Na2S solution was added into the dilute phosphoric acid produced by reverse extraction for secondary impurity removal and adsorption by activated carbon, and then filtrated by precision filter.
10.Oxidation. Add hydrogen peroxide to remove easy oxides contained in dilute phosphoric acid.
11.Evaporation and concentration. The oxidized dilute phosphoric acid was preheated, and the phosphoric acid containing more than 475wt % H3PO475 was obtained after evaporation and concentration. The evaporated hydrochloric acid was recovered and returned to step two for acid dissolution.
12.Decolorization and filtration. The concentrated Phosphoric acid is cooled, and activated carbon is decolorized and filtered to obtain food grade phosphoric acid.

Why Should You Choose Us

1.More than fifteen years of production experience in phosphorus chemical industry.
2.Quality is always the backbone of our business. The special quality management system can ensure our products are meet the requirements of food safety standard.
3.Quick reply after receiving customers’ inquiry.
4.Excellent service. Professional technical and sales team are ready for 24 hours service.
5.Competitive price. With no third party, we can give customers the factory price.

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