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Industrial production method for diammonium phosphate coloring by means of humic acid

A humic acid diammonium phosphate and diammonium phosphate technology, applied in the field of phosphate compound fertilizer, can solve the problems of pollution, accumulation, and unrealistic coloration, and achieve obvious economic benefits.

Inactive Publication Date: 2016-05-18
YUNNAN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the state has become more and more strict on the control of harmful elements in chemical fertilizer products. For example, the Central Document No. 1 in 2014 pointed out that most of the organic colorants used in existing chemical fertilizers will cause potential pollution to soil and water bodies and accumulate in the environment. The state will intensify the prevention and control of pollution caused by the application of agricultural chemical fertilizers in the future
Under such background conditions, relevant phosphate fertilizer production enterprises put forward suggestions to cancel the coloring of phosphate fertilizers. However, due to the market’s certain approval process for non-colored phosphate fertilizers, it is not realistic to cancel the coloring of phosphate fertilizers in the short term. Therefore, an environmentally friendly and cheap fertilizer has been developed. The new type of diammonium phosphate colorant has become an urgent need for related production enterprises

Method used

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  • Industrial production method for diammonium phosphate coloring by means of humic acid
  • Industrial production method for diammonium phosphate coloring by means of humic acid
  • Industrial production method for diammonium phosphate coloring by means of humic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add HA 总 =62.42%, H 水 The ammonium humate colorant raw material of =45.85% is mixed with process water according to the consumption of 2.5kg (in terms of per ton of diammonium phosphate product) in the melting tank, and is mixed with a concentration of 10% colorant solution, and the prepared solution Stir evenly and overflow to the solution tank for later use;

[0037] (2) will P 2 o 5 Concentration 44.75%, specific gravity 1.65×10 3 kg / m 3 , with a solid content of 12.20% and SO4 2- Phosphoric acid with a content of 4.20% is metered and enters the granulation washer to wash the tail gas produced by granulation and adjust the specific gravity of the washing liquid to 1.58×10 3 kg / m 3 , pass into the tubular reactor to neutralize with phosphoric acid, sulfuric acid, liquid ammonia, after the reaction generates a slurry with a neutralization degree of 1.77, mix it with the colorant solution injected in step (1) and spray it on the granulation machine bed, And ...

Embodiment 2

[0043] (1) Add HA 总 =72.47%, H 水 =61.59% potassium humate coloring agent raw material is mixed with process water in melting tank according to the consumption of 1.0kg (in terms of per ton of diammonium phosphate product), and is prepared into a coloring agent solution with a concentration of 8%, and the prepared solution is stirred After uniformity, overflow to the solution tank for standby;

[0044] (2) will P 2 o 5 Concentration 45.51%, specific gravity 1.66×10 3 kg / m 3 , with a solid content of 13.10% and SO4 2- Phosphoric acid with a content of 4.15% is metered and enters the granulation washer to wash the tail gas produced by granulation and adjust the specific gravity of the washing liquid to 1.57×10 3 kg / m 3 , feed into the tubular reactor to neutralize with phosphoric acid, sulfuric acid, liquid ammonia, after the reaction generates a slurry with a neutralization degree of 1.80, mix it with the colorant solution injected in step (1) and spray it on the granulat...

Embodiment 3

[0050] (1) Add HA 总 =72.49%, H 水 =52.07% potassium fulvic acid coloring agent raw material is mixed with process water according to the consumption of 1.5kg (in terms of per ton of diammonium phosphate product) in the melting tank, and is prepared into a coloring agent solution with a concentration of 12%. Stir evenly and overflow to the solution tank for later use;

[0051] (2) will P 2 o 5 Concentration 45.26%, specific gravity 1.65×10 3 kg / m 3 , with a solid content of 12.9% and SO4 2- Phosphoric acid with a content of 4.08% is metered and enters the granulation washer to wash the tail gas produced by granulation and adjust the specific gravity of the washing liquid to 1.59×10 3 kg / m 3 , pass into the tubular reactor to neutralize with phosphoric acid, sulfuric acid, liquid ammonia, after the reaction generates a slurry with a neutralization degree of 1.82, mix it with the colorant solution that is injected in step (1) and spray it on the granulation machine bed, Wr...

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Abstract

The invention discloses an industrial production method for diammonium phosphate coloring by means of humic acid. The method includes the following steps that a humic acid coloring agent raw material is mixed with diammonium phosphate producing process water in a dissolving tank, and a humic acid solution of a certain concentration is prepared and is injected into a diammonium phosphate pelletizer through a conveying pump to perform paste spraying coloring pelletizing. The method is simple in production technological process, modification is small, investment is little, and the advantages of environmental protection and low cost are achieved. An enterprise can select humic acid raw materials in different types to achieve diammonium phosphate coloring according to the requirement of market clients for appearance color of products.

Description

technical field [0001] The invention relates to a production method for diammonium phosphate coloring in the field of phosphate compound fertilizers, in particular to a method for using humic acid for internal coloring of diammonium phosphate. Background technique [0002] In the past 20 years, with the establishment of various large-scale phosphate compound fertilizer bases in China, the production scale of diammonium phosphate (DAP), as a high-concentration phosphate compound fertilizer, has reached the first place in the world. In the production process of diammonium phosphate, due to the influence of unstable factors of phosphate rock quality, the appearance color of its products usually presents various colors such as yellow, off-white, white through green, white through black and so on. Since the use of diammonium phosphate products in agricultural production at home and abroad in the 1970s, agricultural producers have a high degree of recognition for the brown diammon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B7/00C05G3/80C05G5/12C05G5/30C05F11/02
Inventor 曾波查坐统王志刚
Owner YUNNAN CHEM RES INST
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