Synthetic method of zinc polyaspartate

A technology of zinc polyaspartate and zinc polyaspartate, applied in the direction of adding substances water/sewage treatment, etc., can solve problems such as inability to large-scale production, avoid the production of a large amount of calcium salts, and reduce processes and working hours , avoid the effect of using

Active Publication Date: 2020-03-06
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has fast synthesis speed and high purity, but due to equipment limitations, it cannot be produced on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 450Kg of pure water, 300Kg of polysuccinimide (molecular weight 5000), 50Kg of zinc hydroxide and 1Kg of ammonium nitrate to the reaction kettle in sequence, turn on the stirring and tail gas recovery device, raise the temperature to 90±2°C, and start to slowly Ammonia water with a mass fraction of 10% was intermittently added dropwise to control the pH value of the reaction solution at 8-9. Start timing from the dripping of ammonia water, add 50Kg of zinc hydroxide after 1h, and add the remaining 50Kg of zinc hydroxide after 2h. After continuing to react for 4 hours, the precipitate completely disappeared, and the reaction solution was an amber transparent liquid. Add 10% hydrochloric acid dropwise to adjust the pH value of the reaction solution to 5.8, and continue to keep warm for 1 hour to obtain an aqueous solution with a solid content of 41.36%. At ±5°C, spray-dry to obtain 476.5Kg of brown-yellow powdery solid zinc polyaspartate, the molecular weight of zinc ...

Embodiment 2

[0024] 156Kg zinc hydroxide is disposablely put into still, other conditions are constant, same as embodiment 1, obtain brownish-yellow powdery solid polyaspartic acid zinc 475.8Kg, polyaspartic acid zinc molecular weight 7482, solid content 98.34%, The organic zinc content is 19.11%, the ammonium chloride content is 3.41%; the tail gas absorption liquid is 103.23Kg, and the ammonia content of the tail gas absorption liquid is 3.51% (accumulated from the previous embodiment).

Embodiment 3

[0026] Add 600Kg of pure water, 300Kg of polysuccinimide (molecular weight: 5000), 59Kg of zinc hydroxide and 1.7Kg of ammonium nitrate to the reaction kettle in sequence, turn on the stirring and tail gas recovery device, raise the temperature to 90±2°C, and start to pour Slowly and intermittently add ammonia water with a mass fraction of 15% to control the pH value of the reaction solution at 8-9. Start timing from the dripping of ammonia water, add 59Kg of zinc hydroxide after 1h, and add the remaining 59Kg of zinc hydroxide after 2h. After continuing to react for 4 hours, the precipitate completely disappeared, and the reaction solution was an amber transparent liquid. Add 20% hydrochloric acid dropwise to adjust the pH value of the reaction solution to 5.6, and continue to keep warm for 1 hour to obtain an aqueous solution with a solid content of 41.66%. At ±5°C, spray-dry to obtain 493.8Kg of brown-yellow powdery solid zinc polyaspartate, the molecular weight of zinc pol...

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PUM

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Abstract

The invention discloses a production method of zinc polyaspartate. The method comprises the following concrete steps: controlling the pH value of a system by using ammonia water, hydrolyzing polysuccinimide (PSI) to obtain polyaspartic acid (PASP), dissolving zinc hydroxide / zinc oxide into soluble Zn(NH3)4(OH)2 in the presence of an ammonium salt, and reacting the soluble Zn(NH3)4(OH)2 with polyaspartic acid to generate zinc polyaspartate. According to the method, while PSI is hydrolyzed into PASP, zinc polyaspartate is generated from PASP, and the two steps of reactions are carried out at thesame time, so working hours are shortened, and energy consumption is reduced; the method adopts a direct reaction of PASP with a zinc salt and avoids the use of a calcium polyaspartate intermediate,so procedures and working hours are shortened, energy is saved, energy consumption is lowered, and the generation of a large amount of a calcium salt is avoided; and the method has the advantages of no byproduct, no waste generation, environmental protection, and easiness in realization of industrial production.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment agent chemical industry, and in particular relates to a production method of polyaspartic acid zinc salt. Background technique [0002] Zinc is one of the essential trace elements for the human body. It plays an extremely important role in the growth and development of the human body. It is often hailed as the "flower of life" and "the source of intelligence". Zinc can effectively improve the body's resistance. For the elderly, it is also meaningful to improve immunity and resist diseases through zinc supplementation. In China, although the soil is rich in zinc, most of the zinc in the soil exists in the form of insoluble inorganic salts such as zinc carbonate, which cannot be absorbed by crops, resulting in widespread zinc deficiency in crops, not only It affects the yield and quality of crops, and also leads to the general zinc deficiency among Chinese people. [0003] In or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C02F1/68
CPCC02F1/68C08G73/1092
Inventor 程终发周响邱玉章王宁宁王燕平
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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