Method for producing compound fertilizer from allantoin wastewater

A technology of allantoin and compound fertilizer, applied in fertilization device, fertilizer mixture, application and other directions, can solve the problems of high treatment cost, difficult waste water treatment, reduction of comprehensive production cost of allantoin, etc. Economic and social benefits, and the effect of solving outstanding environmental problems

Active Publication Date: 2015-08-12
HUBEI HONGYUAN PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a method for producing compound fertilizer from allantoin wastewater for the treatment of the above allantoin wastewater. Significantly reduce production costs and realize comprehensive utilization of resources

Method used

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  • Method for producing compound fertilizer from allantoin wastewater
  • Method for producing compound fertilizer from allantoin wastewater
  • Method for producing compound fertilizer from allantoin wastewater

Examples

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Effect test

Embodiment 1

[0056] Embodiment 1, the preparation of allantoin:

[0057]Put 1600kg of 50wt% glyoxylic acid into a 5000L condensation reaction kettle (add 400kg of water to dilute it into a 40wt% aqueous solution), start stirring, add 2560kg of urea, add 423kg of 98% concentrated sulfuric acid, heat up to 80°C, and cool at 78-80°C For the heat preservation reaction, the timing starts when the solid is precipitated. After 1 hour of heat preservation, the temperature is lowered to 70-72°C, and the heat preservation reaction is continued at 70-72°C for 17 hours. Then lower it to 30°C, centrifuge, wash the filter cake with water until the pH of the lotion is 7.0, spin dry, take the filter cake to dry, and obtain 1280 kg of allantoin finished product. The filtrate and the lotion are combined and mixed evenly, which is called allantoin production wastewater, weighing and measuring 14.72 tons (equivalent to about 11.5 tons of wastewater produced per 1 ton of allantoin finished product), which is r...

Embodiment 2

[0063] Embodiment 2 discloses a kind of method that allantoin waste water produces compound fertilizer, and the method comprises the following steps:

[0064] (1) Neutralization reaction: 1500 kg of allantoin production waste water obtained in the above-mentioned embodiment 1 is dropped into a clean 2000L glass-lined reactor, start stirring, open the jacket of the reactor to circulate cooling water, and control the temperature in the kettle to 20-22°C. Use 25.0wt% ammonia solution to neutralize the allantoin production wastewater, adjust the pH value to 6.5, and consume 33.4kg of ammonia water (the amount is based on the pH value reaching the standard).

[0065] (2) Chelation reaction: Add 60kg of chelated iron (EDDHA-FeNa) and polymerized boron (Na 2 B 8 o 13 4H 2 O) 30kg, chelated zinc (Na 2 Zn-EDTA) 22.5kg and humic acid 15kg, carry out chelation reaction, the reaction temperature is controlled at 20-22 ℃, and the reaction time is 4 hours. Chelation reaction feed mass ...

Embodiment 3

[0071] Embodiment 3 discloses a kind of method that allantoin waste water produces compound fertilizer, and the method comprises the following steps:

[0072] (1) Neutralization reaction: 1500 kg of allantoin production waste water obtained in the above-mentioned embodiment 1 is dropped into a clean 2000L glass-lined reactor, start stirring, open the jacket of the reactor to circulate cooling water, and control the temperature in the kettle to 21-23° C. Use 22.5% ammonia solution to neutralize the allantoin production wastewater, adjust the pH value to 6.8, and consume 38.2kg of ammonia water (the amount is based on the pH value reaching the standard).

[0073] (2) Chelation reaction: Add 75kg of chelated iron (EDDHA-FeNa) and polymerized boron (Na 2 B 8 o 13 4H 2 O) 40.5kg, chelated zinc (Na 2 Zn-EDTA) 30kg and humic acid 22.5kg, carry out chelation reaction, the reaction temperature is controlled at 21-23 ℃, and the reaction time is 5 hours. Chelation reaction feed rat...

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Abstract

The invention discloses a method for producing a compound fertilizer from allantoin wastewater and belongs to the field of a wastewater processing technology. The method comprises the following steps: adjusting pH value of allantoin wastewater to 6.5-7.0 by using ammonia; and reacting by adding iron chelate, polymerized boron, zinc chelate and humic acid. Mass ratio of allantoin wastewater to iron chelate to polymerized boron to zinc chelate to humic acid is 1:0.04-0.05:0.02-0.025:0.015-0.02:0.01-0.015. According to the method provided by the invention, active ingredients in allantoin production wastewater are comprehensively utilized, and multiple nutritional ingredients such as iron, boron, zinc, humic acid and the like which are essential to plants are introduced to synthesize the multifunctional compound fertilizer. By the method, the prominent problem of environmental protection in production of allantoin can be solved, and production costs of allantoin can be reduced. Equipment requirements are low, and the method is simple to operate. The compound fertilizer obtained by the method has good fertilizer efficiency and has a certain effect of increasing yield and preventing disease and pest injury.

Description

technical field [0001] The present invention relates to a compound fertilizer synthesis method, in particular to a compound fertilizer containing urea, ammonium sulfate, allantoin, iron, boron, The method of liquid compound fertilizer with multiple nutrients such as zinc and humic acid aims to solve the problem of difficult treatment of allantoin production wastewater, and at the same time reduce the production cost of allantoin by producing compound fertilizer by-products. Background technique [0002] With the continuous increase in the variety and quantity of chemical fertilizers and the improvement of agricultural intensification, compound fertilizers are currently developing in the direction of high efficiency, compounding, liquefaction, specialization, and slow effect. The general trend is to develop high-efficiency, high-concentration compound fertilizers to save energy, reduce by-products, improve fertilizer efficiency, save storage and transportation costs, and redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 鲍应元徐双喜邓支华晏浩哲
Owner HUBEI HONGYUAN PHARMA
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