Composite fertilizer prepared by production waste liquid of allantoin and preparation method thereof

A technology of allantoin and compound fertilizer, which is applied in the field of allantoin and can solve problems such as waste of resources and environmental pollution

Inactive Publication Date: 2018-12-11
茆振斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that in the process of producing allantoin by glyoxal nitric acid oxidation, the wastewater produced contains a large amount of nitric acid. The discharge of nitric acid will cause great pollution to the environment, and the loss of N resources will also form a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Crush soybean meal and rapeseed cake to an average particle size of 0.4mm, then add quicklime and soak in water (soaking temperature is 50°C, soaking time is 5h) to prepare a mixture, in which soybean meal, rapeseed cake, quicklime, The weight ratio of water is 20:13:8:250;

[0041] 2) Concentrate the allantoin production waste liquid and the mixture under reduced pressure according to the weight ratio of 10:13 (the pressure is 45kPa, the concentration temperature is 70°C, and the concentration time is 1.5h) to obtain the concentrate;

[0042] 3) Filter the concentrated solution, and then dry (the drying temperature is 130°C and the drying time is 5h) the filter cake A1.

Embodiment 2

[0044] 1) Crush soybean meal and rapeseed cake to an average particle size of 0.2mm, then add quicklime and soak in water (soaking temperature is 40°C, soaking time is 6h) to prepare a mixture, in which soybean meal, rapeseed cake, quicklime, The weight ratio of water is 20:10:5:200;

[0045] 2) Concentrate the allantoin production waste liquid and the mixture under reduced pressure at a weight ratio of 10:10 (the pressure is 40kPa, the concentration temperature is 60°C, and the concentration time is 2h) to obtain the concentrate;

[0046] 3) Filter the concentrated solution, and then dry (the drying temperature is 120°C and the drying time is 6h) the filter cake A2.

Embodiment 3

[0048] 1) Crush soybean meal and rapeseed cake to an average particle size of 0.5mm, then add quicklime and soak in water (soaking temperature is 60°C, soaking time is 4h) to prepare a mixture, in which soybean meal, rapeseed cake, quicklime, The weight ratio of water is 20:15:10:300;

[0049] 2) Concentrate the allantoin production waste liquid and the mixture under reduced pressure according to the weight ratio of 10:15 (the pressure is 50kPa, the concentration temperature is 80°C, and the concentration time is 1h) to obtain the concentrate;

[0050] 3) Filter the concentrated solution, and then dry (the drying temperature is 140°C and the drying time is 4 hours) the filter cake A3.

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Abstract

The invention discloses a composite fertilizer prepared by production waste liquid of allantoin and a preparation method thereof. A preparation method of the composite fertilizer using the waste liquid in production of urea comprises the following steps of (1) crushing the soybean meal and the rapeseed cake, adding into quick lime and water, and soaking, so as to obtain a mixture; (2) performing pressure-relief concentration on the production waste liquid of allantoin and the mixture, so as to obtain the concentrated liquid; (3) filtering the concentrated liquid, and drying filter cakes; (4) mixing the dried filter cakes, chicken manure and river sludge, so as to obtain the composite fertilizer. The composite fertilizer has the advantages that the fertility is excellent; the procedures aresimple, and the operation is simple and convenient.

Description

technical field [0001] The invention relates to allantoin, in particular to a compound fertilizer obtained from allantoin production waste liquid and a preparation method thereof. Background technique [0002] Allantoin, English name Allantion, chemical name 1-ureidodiazolane-2,4-dione, is an important fine chemical product with a wide range of uses. Allantoin has physiological functions such as promoting the growth of skin epithelial cells, healing sores, relieving pain, and softening keratin. It is also non-toxic, non-irritating, non-allergic, has light-proof, bactericidal, anti-corrosion, and anti-oxidation effects, and can keep the skin hydrated. , Moisturizing and soft, so it is widely used in the production of medicine and cosmetics. In addition, allantoin also has the function of stimulating biological growth, and can be used as a plant growth regulator in agricultural production, with effects such as fruit strengthening, ripening, and yield increase. [0003] Natur...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C05G1/00
CPCC05D3/02C05F3/00C05F5/002C05F7/00
Inventor茆振斌
Owner茆振斌