Treatment method of allantoin production waste liquid

A processing method and technology for allantoin, applied in the field of allantoin, can solve problems such as environmental pollution and resource waste

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

[0032] 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;

[0033] 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;

[0034] 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

[0036] 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;

[0037] 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;

[0038] 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

[0040] 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;

[0041] 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;

[0042] 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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PUM

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Abstract

The invention discloses a treatment method of allantoin production waste liquid. The treatment method of the allantoin production waste liquid comprises the steps that (1) bean pulp and rape seed cakes are smashed, then calcium oxide and water are added to soak the smashed bean pulp and rape seed cakes, and a mixture is obtained; (2) the allantoin production waste liquid and the mixture are subjected to vacuum concentration, and thus a concentrated solution is obtained; and (3) the concentrated solution is filtered, and then filter cakes are dried. The treatment method of the allantoin production waste liquid can effectively convert the nitrogen source in the waste liquid into an available fertilizer.

Description

technical field [0001] The invention relates to allantoin, in particular to a treatment method for allantoin production waste liquid. 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] Natural allantoin exists in the excrement of some a...

Claims

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Application Information

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IPC IPC(8): C05G1/00
CPCC05D3/02C05F5/002C05F7/00
Inventor茆振斌
Owner茆振斌