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Film-cCoated long-acting slow-release nitrogen fertilizer containing organic matters and preparation method thereof

An organic matter and coating technology, applied in organic fertilizers, nitrogen fertilizers, layered/coated fertilizers, etc., can solve the problems of land pollution, difficulty in controlling the amount of polyurethane material added and coating rate, and high cost of production raw materials, reducing the use of , Excellent sustained release effect, the effect of short degradation time

Inactive Publication Date: 2017-12-01
成都云图控股股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the high cost of raw materials for the production of the above-mentioned polyurethane coated fertilizer, it is difficult to control the amount of polyurethane material added and the coating rate in the production process, and the problems that may cause land pollution during long-term use during use

Method used

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  • Film-cCoated long-acting slow-release nitrogen fertilizer containing organic matters and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] [1] According to castor oil, polypropylene glycol 400, No. 58 paraffin and triethanolamine, the polyurethane coating agent is formulated with a mass ratio of 7:1:1:0.05;

[0027] [2] According to the papermaking black liquor and polyethylene glycol 4000, the organic binder mixed solution is prepared at a mass ratio of 10:1;

[0028] [3] Add 600g of urea into the coating machine, set the speed of the coating machine to 40-50 rpm, heat up to 75°C with air blast, add 4g of polyurethane coating agent mixture and 2g of crosslinking agent isocyanate to cure for 4 minutes;

[0029] [4] Spray 6g of organic binder mixed liquid into the product obtained in step [3] and rotate for 0.5-1 minute, then add 12g of ammoniated lignite, repeat this step 3 times;

[0030] [5] After heating the product obtained in step [4] with hot air for 4 minutes and drying it, add 12 g of No. 58 paraffin wax melt and continue to rotate for 2 minutes and mix well.

Embodiment 2

[0032] [1] According to castor oil, polypropylene glycol 400, No. 58 paraffin and triethanolamine, the polyurethane coating agent is formulated with a mass ratio of 7:1:1:0.05;

[0033] [2] According to the papermaking black liquor and polyethylene glycol 4000, the organic binder mixed solution is prepared at a mass ratio of 20:1;

[0034] [3] Add 600g of urea to the coating machine, 40-50 rpm, heat up to 75°C with air blast, add 4g of polyurethane coating agent mixture and 2g of crosslinking agent isocyanate to cure for 4 minutes;

[0035] [4] Spray the product obtained in step [3] into 6g of organic binder mixed solution and rotate for 0.5-1 minute, add 12g of ammoniated lignite, repeat this step 3 times;

[0036] [5] Heat the product in step [4] with hot air for 4 minutes and dry it, then add 12g of No. 58 paraffin wax melt and continue to rotate for 2 minutes to mix.

Embodiment 3

[0038] [1] According to castor oil, polypropylene glycol 400, No. 58 paraffin and triethanolamine, the polyurethane coating agent is formulated with a mass ratio of 7:1:1:0.05;

[0039] [2] According to the papermaking black liquor and polyethylene glycol 4000, the organic binder mixed solution is prepared at a mass ratio of 10:1;

[0040] [3] Add 600g of urea to the coating machine, 40-50 rpm, heat up to 80°C with air blast, add 8g of polyurethane coating agent mixture and 4g of crosslinking agent isocyanate to cure for 4 minutes;

[0041] [4] Spray the product obtained in step [3] into 6g of papermaking black liquor and binder mixed solution and rotate for 0.5-1 minute, add 12g of ammoniated lignite, repeat this step 3 times;

[0042] [5] After heating the product obtained in step [4] with hot air for 4 minutes and drying it, add 12 g of No. 58 paraffin wax melt and continue to rotate for 2 minutes and mix well.

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Abstract

The invention belongs to the technical field of film-coated slow-release fertilizer and in particular relates to film-coated long-acting slow-release nitrogen fertilizer containing organic matters and a preparation method thereof. The invention aims at solving the problems of polyurethane film-coated fertilizer that the cost of production raw materials is high, the adding amount of a polyurethane material in a production process and the film-coating rate are difficult to grasp and land pollution is possibly caused when the fertilizer is used for long time. According to the technical scheme provided by the invention, a polyurethane layer is coated with the organic matters. Under the premisecondition that better slow-release performance and release period, the usage amount of the polyurethane material is effectively reduced, so that the production cost and the production difficulty are reduced; meanwhile, an organic matter layer can also provide organic matter nutrients for soil. The organic matter layer is prepared from raw materials including papermaking black liquid, a binding agent and ammoniated lignite; papermaking waste materials are utilized; the organic matter layer is easy to degrade and has the characteristics of energy saving and environment protection. A product is applicable to farm production and the preparation method is suitable for preparing the film-coated fertilizer.

Description

technical field [0001] The invention belongs to the technical field of coated slow-release fertilizers, in particular to a coated long-acting slow-release nitrogen fertilizer containing organic matter and a preparation method thereof. Background technique [0002] my country's current fertilizers are mainly quick-acting fertilizers, which are prone to leaching and volatilization in the soil, resulting in the loss of a large amount of nutrient elements, making the fertilizer utilization rate extremely low, about 20-30%, and a large amount of nutrients lost with rainwater Elements can also cause environmental problems such as eutrophication of water bodies. [0003] In order to improve the utilization rate of fertilizers, people have developed new slow-release fertilizers that are different from traditional quick-acting fertilizers, mainly coated fertilizers, especially coated urea. Film fertilizers such as sulfur-coated urea and urea-formaldehyde resin, polystyrene, polyethyl...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05C9/00C05G5/30C05G5/37C05F7/02C05F11/02
Inventor 阎应广蒋天举龚正涛莫仕明朱鹏
Owner 成都云图控股股份有限公司
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