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Soil nitrification inhibitor slow-release body containing sodium carboxymethyl cellulose and preparation method thereof

A technology of sodium carboxymethyl cellulose and nitrification inhibitor, which is applied in the field of soil nitrification inhibitor slow-release body and its preparation, can solve the problem of limiting the application range and application effect of DMPP, uniform and effective distribution of difficult product components, and spray drying equipment. High requirements are required to achieve good denitrification performance, good embedding capacity, and good water solubility.

Inactive Publication Date: 2021-01-29
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One is that DMPP is relatively easy to volatilize, especially when it is applied to alkaline soil, it is more volatile after neutralization of phosphate and alkali, which greatly limits the application range and application effect of DMPP;
[0004] Second, due to the volatility of DMPP, it is impossible to add internally during the fertilizer production process, so DMPP is mainly applied to the surface of fertilizers through external spraying technology, but the process of external spraying is relatively difficult, and the requirements for instruments are also very strict. The production can not be completed at one time, multiple spraying, time-consuming and material-consuming
This preparation method is to mix DMPP and protective agent into a uniform solution, and then spray dry to obtain a stable product. Compared with the previous preparation method, it is simpler, but it is difficult to ensure the product composition formed by spraying due to the need for spray drying. Evenly distributed and effective, and spray drying has high requirements on instruments, and the preparation method is still relatively complicated

Method used

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  • Soil nitrification inhibitor slow-release body containing sodium carboxymethyl cellulose and preparation method thereof
  • Soil nitrification inhibitor slow-release body containing sodium carboxymethyl cellulose and preparation method thereof
  • Soil nitrification inhibitor slow-release body containing sodium carboxymethyl cellulose and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] A soil nitrification inhibitor slow-release body containing sodium carboxymethylcellulose, comprising 0.5g of polyvinyl alcohol, 0.375g of sodium carboxymethylcellulose, and 1.125g of dimethyl phosphate, by mass percentage, polyethylene Alcohol accounts for 20 parts, sodium carboxymethylcellulose accounts for 15 parts, and dimethyl methylphosphonate accounts for 45 parts.

[0030] The preparation method of the soil nitrification inhibitor sustained-release body containing sodium carboxymethyl cellulose comprises the following steps:

[0031] (1) Prepare polyvinyl alcohol solution; weigh 0.5g of polyvinyl alcohol in a beaker, add 100ml of deionized water, put it in a water bath, stir at 80°C to 100°C until completely dissolved; then place it at room temperature, Stir continuously with a magnetic stirrer, set aside;

[0032] (2) Prepare slow-release body solution; weigh 0.375g of sodium carboxymethylcellulose and 1.125g of dimethyl methylphosphonate in a beaker, add 15ml...

Embodiment 2

[0036] A soil nitrification inhibitor slow-release body containing sodium carboxymethyl cellulose, comprising 0.625 g of polyvinyl alcohol, 0.5 g of sodium carboxymethyl cellulose, and 1.375 g of dimethyl phosphate, by mass percentage, polyethylene Alcohol accounts for 25 parts, sodium carboxymethylcellulose accounts for 20 parts, and dimethyl methylphosphonate accounts for 55 parts.

[0037] The preparation method of the soil nitrification inhibitor sustained-release body containing sodium carboxymethyl cellulose comprises the following steps:

[0038] (1) Prepare polyvinyl alcohol solution; weigh 0.625g of polyvinyl alcohol in a beaker, add 100ml of deionized water, put it in a water bath, stir at 80°C to 100°C until completely dissolved; then place it at room temperature, Stir continuously with a magnetic stirrer, set aside;

[0039] (2) Prepare the sustained-release body solution; weigh 0.5 g of sodium carboxymethyl cellulose and 1.375 g of dimethyl methylphosphonate in a...

Embodiment 3

[0043] A soil nitrification inhibitor slow-release body containing sodium carboxymethyl cellulose, comprising 1.0 g of polyvinyl alcohol, 0.625 g of sodium carboxymethyl cellulose, and 1.5 g of dimethyl phosphate, by mass percentage, polyethylene Alcohol accounts for 40 parts, sodium carboxymethylcellulose accounts for 25 parts, and dimethyl methylphosphonate accounts for 60 parts.

[0044] The preparation method of the soil nitrification inhibitor sustained-release body containing sodium carboxymethyl cellulose comprises the following steps:

[0045] (1) Prepare polyvinyl alcohol solution; weigh 1.0g of polyvinyl alcohol into a beaker, add 100ml of deionized water, put it in a water bath, stir at 80°C to 100°C until completely dissolved; then place it at room temperature, Stir continuously with a magnetic stirrer, set aside;

[0046] (2) Prepare the sustained-release body solution; weigh 0.625g of sodium carboxymethylcellulose and 1.5g of dimethyl methylphosphonate in a beak...

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Abstract

The invention discloses a soil nitrification inhibitor slow-release body containing sodium carboxymethyl cellulose and a preparation method thereof, the soil nitrification inhibitor slow-release bodycontaining sodium carboxymethyl cellulose has good denitrification performance, the preparation method of the slow-release body takes sodium carboxymethyl cellulose as a raw material, the raw materialis sufficient and easy to obtain, the performance is stable, sodium carboxymethyl cellulose has good embedding capacity and can supplement soil fertilizer efficiency; the preparation method is simpleand easy for large-scale production, and the environment-friendly slow-release fertilizer can be quickly obtained; the application method is simple, only the slow-release body and the nitrogen fertilizer need to be mixed and put into required soil, and the method is suitable for large-area application and popularization.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a soil nitrification inhibitor slow-release body containing sodium carboxymethyl cellulose and a preparation method thereof. Background technique [0002] Dimethyl methylphosphonate (DMPP) is a highly efficient, safe, non-toxic and relatively cheap nitrification inhibitor. Adding nitrification inhibitor DMPP to fertilizer can inhibit nitrification, nitrification and denitrification bacteria in soil. Activity, control the conversion of ammonium nitrogen to nitrate nitrogen, so as to realize the stable supply of nitrogen, reduce the leaching of nitrate nitrogen and the emission of nitrogen oxides, so as to improve the utilization rate of chemical fertilizers, protect the environment and promote agricultural development. But there are two problems in the DMPP nitrification inhibitor of present application: [0003] One is that DMPP is relatively easy to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G3/50C05G3/90C05G5/30
CPCC05F11/00C05G3/40C05G3/50C05G3/90C05G5/37Y02P60/21
Inventor 石佳惠倪利晓张子豪谭鑫邵晨曦
Owner HOHAI UNIV
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