Dicalcium phosphate production

Dicalcium phosphate production

 

Dicalcium phosphate, also known as calcium monohydrogen phosphate, is a dibasic calcium phosphate. It is usually found as the dihydrate, with the chemical formula of CaHPO₄ • 2H₂O, but it can be thermally converted to the anhydrous form. . It is practically insoluble in water, with a solubility of 0.02 g per 100 mL at 25 °C. It contains about 29.5 % calcium in its anhydrous form.

 

Dicalcium phosphate (CaHPO₄ .2H₂O) is a chemical produced through precipitation from bones or inorganic material.

 

Dicalcium phosphate is an essential ingredient used in stock feeds principally for its Phosphorous and also its Calcium contribution.

 

Phosphorous is an essential nutrient required by all livestock, Phosphorous is of major importance in diet formulations and needs to be balanced correctly. Nearly 86% of phosphorous is found in the skeleton and teeth the remainder is found in soft tissue. There is approximately 1 gram of  P  per litre of a milk, this shows the need to make sure that Phosphorous inputs are continuous to meet the production needs of the female, particularly for high milk production. Phosphorous absorption is stimulated by active forms of Vitamin D3. The amount of P absorb by the animal depends on the source of phosphorous, the amount of intake and the ratio of Calcium to Phosphorous. Iron, Aluminium, Manganese, Potassium, Magnesium and fat all have impacts to some degree on absorption. Low or modest conception rates maybe be a sign of P deficiency, as well as , reduced feed intake, slow growth, other impaired reproduction, lethargy and thriftiness. Often animals displaying stiff joints will also be deficient of P.

 

All minerals interact to some degree, it is very important to make sure that Macro elements such as Phosphorous and Calcium be balanced in all diets, it is always a priority to make sure that minimum daily nutrient intake levels are achieved. Consult your nutritionist for all diets.

 

Usage: In food processing industry, it is used as leavening agent and modifier, buffer, nutritional supplement, emulsifier, stailizer for dough, cake, pastry and bakery.

 

Dicalcium phosphate is obtained from degreased bones which are demineralised by hydrochloric acid treatment and precipitated by a saturated lime solution.

 

Dicalcium phosphate is mainly used as a dietary supplement in prepared breakfast cereals, dog treats, enriched flour, and noodle products.

It is also used as a tableting agent in some pharmaceutical preparations and it is used as a feed for poultry. It is also used in some toothpastes as a tartar control agent.

 

Dicalcium phosphate is one of the mineral phosphorous sources that is commonly used in organic diets.

Dicalcium phosphate was produced in the Serrana plant in Cajati, Brazil by mixing powdered limestone with defluorinated 50-52% phosphoric acid and depositing it on a slow moving covered conveyor belt (den). The production was 165,000 mtpy.

The share of dicalcium phosphate precipitated from bones and used as animal feed, is estimated in the order of 10-15% of the total amount of 720.000- 750.000 tons in Western Europe.  

Quality indexes

 

The phosphates of calcium offered by us have next quality descriptions

 

Name	Code of product	Calcium	Phosphorus
DI-CAFOS Large	С 92-14	22,9%	18,1%
DI-CAFOS P Powder	С 92-01	22,9%	18,1%
DI-CAFOS PF Fine powder	С 92-02	22,9%	18,1%
Waterless diphospates
DI-CAFOS A Large	С 92-12	29,3%	22,5%
DI-CAFOS PA Powder	С 92-04	29,3%	22,5%
DI-CAFOS PAF Fine powder	С 92-05	29,3%	22,5%
Three-substituted for phosphates
TRI-CAFOS P Large	С 53-80	38,5%	17,9%
TRI-CAFOS PF Powder	С 53-81	38,5%	17,9%
TRI-CAFOS MF Fine powder	С 53-83	38,5%	17,9%

 

Physical properties: White and monoclinic crystalline powder; Odourless and colorless; Soluble in diluted Hydrochloric Acid, Nitric Acid and Acetic Acid; Slightly soluble in water but insoluble in Ethanol; Relative density 2.32; Stable in air; To lose crystal water at 75°C and then turn into Dicalcium Phosphate Anhydrous.

Dicalcium phosphate may be formed by the reaction of stoichiometric quantities (equimolar amounts) of calcium carbonate and phosphoric acid:

 

CaCO₃ + H₃PO₄ → CaHPO₄ + H₂O + CO₂

 

Dicalcium phosphate shows the most commonly used production method is known as the “wet acid” route in which rock phosphate is reacted with sulphuric acid to produce phosphoric acid. After concentration and purification to reduce the level of undesirable elements, this phosphoric acid is  reacted with a calcium source such as quick lime or limestone to produce dicalcium phosphate.

 

DCP is made by reacting superphosphate with an alkaline agent. The liming agent is mixed with superphosphate and a chemical reaction occurs to have DCP.

Dicalcium phosphate crystals are precipitated and after filtration and drying the resulting product is a very pure crystalline dihydrate dicalcium phosphate that is sold as Aliphos® Dical.