Feed grade calcium phosphate salt and preparation method thereof

A calcium phosphate, feed-grade technology, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of high total production cost, rising production cost, difficulty in maintaining simple reproduction, etc., and achieve good defluorination Effect, reduced production demand, easy operation effect

Active Publication Date: 2018-11-13
南京牧奇亚生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in recent years, H 2 SO 4 The price of feed has soared, resulting in a substantial increase in production costs, making it unbearable for many feed manufacturers
In areas rich in phosphoric acid resources, industrial phosphoric acid and limestone powder are used to directly produce calcium hydrogen phosphate, which is of good quality, but the total production cost is also high, and it is almost difficult to maintain simple reproduction

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  • Feed grade calcium phosphate salt and preparation method thereof

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[0023] A kind of preparation method of feed grade calcium phosphate salt provided by the embodiment of the present invention comprises:

[0024] Phosphate rock is selected. In the present invention, medium and low-quality phosphate rock ore can be selected as raw material, and impurities such as magnesium, iron, and aluminum in the phosphor rock are removed by flotation, and the quality of feed-grade calcium phosphate is greatly improved. Before the reaction, crush the phosphate rock to 100-120 mesh, so that the phosphate rock and phosphoric acid can fully react and speed up the reaction rate. And crushing the phosphate rock is beneficial to subsequent impurity removal.

[0025] After mixing the phosphate rock and phosphoric acid evenly, react at 90-99°C until the pH value is 4-6. Under this condition, most of the phosphoric acid in the reaction system participated in the reaction. Preferably, the mass ratio of phosphoric acid and phosphate rock is 1-2:1, which ensures that ...

Embodiment 1

[0034] The present embodiment provides a feed grade calcium phosphate salt, which is mainly made by the following steps:

[0035] Select phosphate rock and crush it to 100 mesh.

[0036] Phosphoric acid and phosphate rock are mixed according to the material ratio of 1:1, and reacted at 90°C until the pH value is 4. Add a defluorinating agent, mix well and continue to react under this condition for 1h. Then add zeolite molecular sieves and react at 70° C. for 3 hours. After the reaction, it was filtered, and the obtained filtrate was dried at 70° C. to obtain solid powder of calcium phosphate salt.

[0037] The calcium phosphate salt solid powder and methanol are mixed and washed at a volume ratio of 1:2, and the calcium phosphate salt product and washing liquid are obtained after solid-liquid separation. The calcium phosphate product is distilled to recover methanol to obtain a feed-grade calcium phosphate product, and the washing liquid is distilled to recover methanol to ...

Embodiment 2

[0039] The present embodiment provides a feed grade calcium phosphate salt, which is mainly made by the following steps:

[0040] Select phosphate rock and crush it to 90 mesh.

[0041] Mix phosphoric acid and phosphate rock at a material ratio of 2:1, and react at 99°C until the pH value is 6. Add a defluorinating agent, mix well and continue to react under this condition for 2h. Then add zeolite molecular sieves and react at 80° C. for 4 hours. After the reaction, it was filtered, and the obtained filtrate was dried at 80° C. to obtain solid powder of calcium phosphate salt.

[0042] The calcium phosphate salt solid powder is mixed with acetone at a volume ratio of 1:3, washed, and the calcium phosphate salt product and washing liquid are obtained after solid-liquid separation. The calcium phosphate product is distilled to recover acetone to obtain a feed-grade calcium phosphate product, and the washing liquid is distilled to recover acetone to obtain purified phosphoric ...

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Abstract

The invention provides feed-grade calcium orthophosphate and a preparation method of calcium orthophosphate, and relates to the technical field of feed additives. The preparation method of feed-gradecalcium orthophosphate comprises the steps of mixing phosphorite, phosphoric acid, a defluorination agent and a zeolite molecular sieve for reaction and filtering, drying obtained filtrate to form solid powder of calcium orthophosphate, mixing and washing the solid powder of calcium orthophosphate and an organic solvent, performing solid-liquid separation to form a calcium orthophosphate product and a cleaning solution, distilling the calcium orthophosphate product and the cleaning solution separately to form feed-grade calcium orthophosphate and purified phosphoric acid. The method is easy and simple to operate, strong in controllability and suitable for massive production, simplifies a defluorination step and reduces production requirements. Feed-grade calcium orthophosphate is preparedby the preparation method of feed-grade calcium orthophosphate. Feed-grade calcium orthophosphate is low in fluorine and impurity contents and high in quality.

Description

technical field [0001] The invention relates to the technical field of feed additives, and in particular to feed grade calcium phosphate salt and a preparation method thereof. Background technique [0002] Feed calcium hydrogen phosphate is an important component of the feed industry. A certain proportion of feed calcium hydrogen phosphate is mixed in the feed. The phosphorus in it is an important element for the metabolism and maintenance of physiological functions in the animal body. It is known as the "vital element". Calcium is an important component of bones and teeth. It can promote blood circulation, maintain the conduction performance of nerves under the activation of certain enzymes in the body, and regulate muscle elasticity, normal osmotic pressure of capillaries, and acid-base balance in the body. plays an important role. In the world, feed calcium hydrogen phosphate has been widely promoted and applied, and its annual output and consumption are more than 5 mill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/32C01B25/234
CPCC01B25/234C01B25/32
Inventor 金鹏
Owner 南京牧奇亚生物科技有限公司
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