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Method for preparing fertilizer adsorbing volatilizing nitrogen

A fertilizer and nitrogen technology, applied in the field of impregnating activated carbon to prepare fertilizer, can solve the problems of weak ammonia adsorption, small specific surface of bamboo charcoal, etc.

Inactive Publication Date: 2009-10-28
SICHUAN ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small surface area of ​​bamboo charcoal, the adsorption capacity for ammonia is weak

Method used

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  • Method for preparing fertilizer adsorbing volatilizing nitrogen
  • Method for preparing fertilizer adsorbing volatilizing nitrogen
  • Method for preparing fertilizer adsorbing volatilizing nitrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1. Take 1-12 parts by weight of impregnated activated carbon, add 1-3 parts by weight of diatomaceous earth or activated clay and mix evenly, add 3-38 parts by weight of water, stir evenly, and then add 1-3 parts by weight of polymer adhesive .

[0014] Take 30 grams of powdered activated carbon, then take 1-10% boric acid with a weight of activated carbon weight, and 1-10% potassium sulfate with a weight of activated carbon weight, dissolve in water, then pour into activated carbon, soak for 20-60 minutes, 105 Dry at ℃ to obtain impregnated activated carbon. Take a certain weight of impregnated activated carbon, put it into a weighing box, open the cover and immediately put it into a sealed container with ammonia water. After a period of time, the activated carbon adsorbs ammonia and water vapor in the container, and measures its adsorption capacity. Then the activated carbon was taken out and washed with water to remove the ammonia in the carbon, fixedly ...

Embodiment 2

[0019] Embodiment 2, take 1-12 parts by weight of impregnated activated carbon, add 1-3 parts by weight of diatomaceous earth or activated clay and mix well, add 3-38 parts by weight of water, stir evenly, then add 1-3 parts by weight of polymer adhesive , stir well. Then wrap it on the outside of 30 grams of commercially available urea-type granular fertilizer and dry it. Take a certain amount of this fertilizer and put it into a weighing box, open the cover, put it in a sealed container, put ammonia in this container, and measure its ammonia adsorption capacity.

[0020] See Table 2.

Embodiment 3

[0025] Embodiment 3, get 20 grams of commercially available urea type compound granular fertilizers, its nitrogen, phosphorus, potassium content is ≥ 14%, ≥ 4%, ≥ 7%, total nutrient ≥ 25%, impregnated activated carbon and components thereof The composed wrapping material is wrapped and dried to obtain a sample, and the wrapping amount is 21% of the weight of the sample. Then apply it to indoor soil, measure volatile ammonia by static absorption method, absorb volatile ammonia with 10ml of 2% boric acid, titrate with 0.0209mol / L hydrochloric acid, and calculate the total nitrogen content. The results are shown in Table 3.

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Abstract

The invention discloses a method for preparing fertilizer adsorbing volatilizing nitrogen. Any two reagents selected from sodium chloride, potassium chloride, calcium chloride, potassium sulfate, acetic acid, boracic acid, citric acid and phosphoric acid are used for soaking powdered activated carbon, and the soaked carbon is mixed with components thereof so as to wrap the exterior of fertilizer particles containing nitrogen. The fertilizer can transform the volatilizing ammonia gas of nitrogen into NH4 that can be easily absorbed by earth. The method basically eliminates the volatilization loss of ammonia, simultaneously has slow release effect and can reduce fertilizer loss, keep soil moisture and improve soil.

Description

technical field [0001] The present invention relates to the preparation of fertilizer, especially the method of preparing fertilizer with impregnated active carbon. technical background [0002] The loss of nitrogen fertilizer is mainly through loss and volatilization of nitrogen and ammonia. The disclosed patents of the method for solving the loss at present include: improving the solubility of fertilizers by chemical methods, such as patent CN1470485 carrier-type slow-release fertilizers and its preparation method; improving the solubility of fertilizers by using physical methods, and wrapping the water-insoluble fertilizer on the fertilizer particles. Polymer materials make the water-soluble fertilizer less exposed to water, so as to achieve slow release and reduce loss, such as patent CN1948277, an improved coating urea slow-release fertilizer and its preparation method, and patent CN1927778 composite coated slow-release fertilizer. These methods fail to address the vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G5/00C05G3/90
Inventor 慕长龙胡刘平解锦华
Owner SICHUAN ACAD OF FORESTRY
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