Urea formaldehyde modifier as well as preparation method and application thereof

A technology of urea-formaldehyde and modifier, applied in the field of urea-formaldehyde modifier and its preparation, can solve the problems of uncoordinated growth cycle of crops, underutilized nutrients, affecting crop yield, etc. The effect of fast nitrogen release performance and optimized degradation rate

Inactive Publication Date: 2018-03-30
GUIZHOU WUGUHUI ECOLOGICAL AGRI TECHCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of urea-formaldehyde slow-release fertilizers, the defects of urea-formaldehyde slow-release fertilizers are gradually reflected, making urea-formaldehyde slow-release fertilizers have a long slow-release period of urea-formaldehyde, making it difficult for nutrients to grow in most crops , the release is complete, causing the nutrient release of urea-formaldehyde slow-release fertilizer to be inconsistent with the growth cycle of most crops, especially the crops with a growth cycle of less than 6 months
The reason is: after monitoring the sustained release of nutrients in the existing urea-formaldehyde slow-release fertilizer, it is concluded that the slow-release period of the existing urea-formaldehyde in the slow-release nutrient process is after six months, and there is still a great deal of time left. Part of the nutrients (nitrogen) are not released, which causes the nutrients in the fertilizer applied to the soil to not be fully utilized after the crop growth cycle is over, which not only causes the environment to be polluted, but also causes the crops The cost of planting is high, the amount of fertilizer is increased, and it may even affect the yield of crops

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of urea-formaldehyde modifier, comprising the following steps:

[0028] (1) starch and water are mixed into a solution to obtain a starch solution;

[0029] (2) screening organic acid-producing bacteria, and carrying out conventional liquid fermentation to make fermented seed liquid;

[0030] (3) Treat the starch solution with glucoamylase, the amount of glucoamylase added is 12U per gram of starch, stir and mix evenly, and stir at a temperature of 45°C for 5 hours to obtain a saccharification solution;

[0031] (4) Add 5 g of nitric acid, 1 g of potassium dihydrogen phosphate, and 5 g of yeast powder into the saccharification liquid according to 1 L, stir evenly, transfer it to a fermentation tank, and inoculate the seed liquid so that the organic acid bacteria in the seed liquid account for 1% of the mass of the starch solution , adjust the pH value to 5, ferment at a temperature of 30°C, and stir at a stirring speed of 30r / min during the ferment...

Embodiment 2

[0033] A preparation method of urea-formaldehyde modifier, comprising the following steps:

[0034] (1) Starch is formulated into a solution to obtain a starch solution;

[0035] (2) screening organic acid-producing bacteria, and carrying out conventional liquid fermentation to make fermented seed liquid;

[0036] (3) Treat the starch solution with glucoamylase, the amount of glucoamylase added is 27U per gram of starch, after stirring and mixing evenly, stir at a temperature of 53°C for 8 hours to obtain a saccharification solution;

[0037] (4) Add 10 g of nitric acid, 2 g of potassium dihydrogen phosphate, and 8 g of yeast powder to the saccharification liquid according to 1 L, stir evenly, transfer it to a fermentation tank, and inoculate the seed liquid so that the organic acid bacteria in the seed liquid account for 5% of the mass of the starch solution , adjust the pH value to 7, ferment at a temperature of 55°C, and stir at a stirring speed of 50r / min during the ferme...

Embodiment 3

[0040] A preparation method of urea-formaldehyde modifier, comprising the following steps:

[0041] (1) Starch is formulated into a solution to obtain a starch solution;

[0042] (2) screening organic acid-producing bacteria, and carrying out conventional liquid fermentation to make fermented seed liquid;

[0043] (3) Treat the starch solution with glucoamylase, the amount of glucoamylase added is 17U per gram of starch, after stirring and mixing evenly, the temperature is 49°C for 7 hours to obtain a saccharification solution;

[0044] (4) Add 9 g of nitric acid, 1.5 g of potassium dihydrogen phosphate, and 7 g of yeast powder to the saccharification liquid according to 1 L, stir evenly, transfer to the fermentation tank, and inoculate the seed liquid so that the organic acid bacteria in the seed liquid account for 3% of the starch solution mass. %, adjust the pH value to 6, ferment at a temperature of 45°C, and stir at a stirring speed of 40r / min during the fermentation pro...

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PUM

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Abstract

The invention relates to the technical field of modification treatment of urea formaldehyde used for slow-release fertilizers, and in particular relates to a urea formaldehyde modifier as well as a preparation method and application thereof. According to the method provided by the invention, an organic acid prepared by fermentation of starch is adopted as the urea formaldehyde modifier, and the organic acid is used for modification treatment of urea formaldehyde, wherein the organic acid makes nitrogen of the urea formaldehyde released quickly, makes the modified urea formaldehyde more suitable for the production of the slow-release fertilizers, and improves the quality of the slow-release fertilizers; and the added organic acid is obtained by fermentation of biomass components, a plurality of the biomass components are compounded in the organic acid, and after entering soil, the organic acid can effectively improve the soil and provide nutrients for crops.

Description

technical field [0001] The invention relates to the technical field of urea-formaldehyde modification treatment for slow-release fertilizers, in particular to a urea-formaldehyde modifier and a preparation method and application thereof. Background technique [0002] With the continuous development of urea-formaldehyde slow-release fertilizers, the defects of urea-formaldehyde slow-release fertilizers are gradually reflected, making urea-formaldehyde slow-release fertilizers have a long slow-release period of urea-formaldehyde, making it difficult for nutrients to grow in most crops , The release is complete, causing the nutrient release of urea-formaldehyde slow-release fertilizer to be inconsistent with the growth cycle of most crops, especially the crops with a growth cycle of less than 6 months. The reason is: after monitoring the sustained release of nutrients in the existing urea-formaldehyde slow-release fertilizer, it is concluded that the slow-release period of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05C9/02C05G3/04C12P7/40C12P39/00C12R1/07C12R1/01C05G3/80
CPCC05B3/00C05B7/00C05C9/005C05C9/02C05G3/80C12P7/40C12P39/00C05D1/02C05D9/00C05F9/04C05D1/00C05F3/00C05D9/02C05F11/00C05F11/08Y02P60/21
Inventor 陈文兴周昌平王瑶虞江陈思帆汪东远田娟
Owner GUIZHOU WUGUHUI ECOLOGICAL AGRI TECHCO
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