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Synthetic technology of high purity ammonium metaphosphate

A technology of ammonium metaphosphate and synthesis process, applied in phosphorus compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of easy generation of dangerous toxic substances, harsh production conditions of ammonium metaphosphate, and low product purity, etc., and achieves favorable quality. , The ratio of raw materials is scientific and reasonable, and the effect of avoiding easy agglomeration

Inactive Publication Date: 2013-05-08
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a high-purity ammonium metaphosphate synthesis process, which solves the problems in the prior art that ammonium metaphosphate production conditions are harsh, dangerous and toxic substances are easily produced in the production process, and the product purity is not high

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  • Synthetic technology of high purity ammonium metaphosphate
  • Synthetic technology of high purity ammonium metaphosphate

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Experimental program
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Effect test

Embodiment 1

[0032] Will P 2 o 5 , diammonium phosphate and additives are prepared into mixed raw materials according to the mass ratio of 2:2:1 and ground to 40 meshes. Preheat the reactor to 180°C and then feed the mixed raw materials. The reaction time is 40 minutes. After the reaction is completed, put it into the cooler Cool in medium for 30 minutes to obtain ammonium metaphosphate product.

Embodiment 2

[0034] Will P 2 o 5 , diammonium phosphate and additives are formulated into mixed raw materials according to the mass ratio of 1.8:1.8:0.8 and ground to 80 meshes. The reactor is preheated to 190°C and then fed into the mixed raw materials. The reaction time is 60 minutes. After the reaction is completed, put it into the cooler Cool in medium for 60 minutes to obtain ammonium metaphosphate product.

Embodiment 3

[0036] Will P 2 o 5 , diammonium phosphate and additives are formulated into mixed raw materials according to the mass ratio of 2.2:2.2:1.2 and ground to 100 mesh. The reactor is preheated to 200°C and then fed into the mixed raw materials. The reaction time is 80 minutes. After the reaction is completed, put it into the cooler Cool in medium for 90 minutes to obtain ammonium metaphosphate product.

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Abstract

The invention discloses a synthetic technology of high purity ammonium metaphosphate. The synthetic technology comprises the following steps of: preparing a mixed raw material by mixing P2O5, diammonium phosphate and an additive with the mass ratio of (1.8-2.2): (1.8-2.2): (0.8-1.2), grinding the mixed raw material into particles with 40-200 meshes, preheating a reactor to 180-220 DEG C with the reaction time of 40-120 minutes, and putting the mixed raw material into a cooler to be cooled with 30-120 minutes after reaction to obtain a ammonium metaphosphate product. According to the synthetic technology, the P2O5, the diammonium phosphate and the additive are adopted to directly synthesize the high purity ammonium metaphosphate, the production process is simple, the operation condition is mild, and the purity of the obtained product (the coincidence degree with an XRD (X-Ray Diffraction) spectra) reaches above 99 percent.

Description

technical field [0001] The invention relates to a high-purity ammonium metaphosphate synthesis process. Background technique [0002] Ammonium metaphosphate (NH 4 PO 3 ) is a high-concentration phosphorus-nitrogen fertilizer, which is slightly hygroscopic and non-caking. Its industrial products are not pure substances, so side reactions occur during synthesis, and often contain other nitrogen and phosphorus compounds. At present, the production of ammonium metaphosphate is mostly the gaseous P produced by the combustion of yellow phosphorus. 2 o 5 It reacts directly with wet ammonia gas to form ammonium metaphosphate. Because the reaction process will have a highly toxic pH 3 Formation, and yellow phosphorus itself is extremely dangerous, making the production process of ammonium metaphosphate extremely dangerous. [0003] The method for preparing ammonium metaphosphate is generally divided into one-step method and two-step method. The one-step method is to convert th...

Claims

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Application Information

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IPC IPC(8): C01B25/44
Inventor 徐魁廖吉星宋同彬彭宝林潘礼富郑超周勇朱飞武王先炜韩朝应谢静张丽
Owner GUIZHOU KAILIN GRP CO LTD