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Modified waste oil coating material and application of the same in coating slow/controlled release fertilizers

A technology of coated materials and controlled-release fertilizers, applied in the field of modified waste oil coated materials and its application in coated slow/controlled release fertilizers, can solve the problem of no actual requirements for the degradation of membrane materials, the environment and human health Unfavorable, difficult to degrade the coating material and other problems, to achieve the effect of low cost, reduce the harm to the environment and human body, and simple preparation process

Inactive Publication Date: 2014-04-30
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the organic solvent type is the earliest, the most and the most mature one, but due to the existence of the solvent, not only the equipment requirements are high, the production cost is high, the environment and human health are also very unfavorable, and its coating material is in the soil It is difficult to degrade in the medium, which will cause new pollution to the soil
Although water emulsion type and in-situ reaction type coating materials are more environmentally friendly, they also have high cost, high process requirements, and there is still no practical requirement for the degradation of membrane materials, and the product is also very single

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Preparation of modified waste oil coating material:

[0025] First add 30g of waste oil with an acid value of 68mgKOH / g and 24g of hydroxyethyl methacrylate into the reactor, stir well, then add 1.8g of p-toluenesulfonic acid and 0.1g of hydroquinone, stir, and heat up to 100°C , reacted for 1.5h, cooled and discharged; then added 1.2g of aziridine at room temperature and mixed uniformly to obtain a modified waste oil coating material dispersion with a viscosity of 70mPa?s.

[0026] 2) Preparation of coated slow / controlled release fertilizer:

[0027] First take 1 kg of large-grain urea with a particle size of 2-5mm and place it in a disc, start it up and preheat it to 85°C; then spray the prepared dispersion of modified waste oil coating material onto the preheated large On the surface of granular urea, the spraying speed is about 15g / min, the spraying pressure is 0.2Mpa, and at the same time, hot air at 85°C is blown to dry the fertilizer. The actual coating amoun...

Embodiment 2

[0029] 1) Preparation of modified waste oil coating material

[0030] First add 46g of waste oil with an acid value of 55mgKOH / g and 20g of hydroxyethyl acrylate into the reactor, stir well, then add 0.8g of concentrated sulfuric acid and 0.5g of p-tert-butylcatechol, stir, heat up to 100°C, and react for 2h. Cooling and discharging; then 3.5 g of polypropylene glycol glycidyl ether was added at room temperature, and mixed uniformly to obtain a modified waste oil coating material dispersion with a viscosity of 90 mPa·s.

[0031] 2) Preparation of coated slow / controlled release fertilizer

[0032] First take 2kg of granular diammonium phosphate with a particle size of 2mm to 5mm and place it in the disc, start it up and preheat it to 110°C; then spray the prepared modified waste oil coating material dispersion on the preheated On the surface of granular diammonium phosphate, the spraying speed is about 25g / min, the spraying pressure is 0.5Mpa, and at the same time blowing hot ...

Embodiment 3

[0034] 1) Preparation of modified waste oil coating material

[0035] First add 20g of waste oil with an acid value of 110mgKOH / g and 40g of 4-hydroxybutyl acrylate into the reaction kettle, stir evenly, add 1.2g of p-toluenesulfonic acid and 0.4g of p-hydroxyanisole, stir, and heat up to React at 80°C for 3 hours, cool and discharge; then add 0.7 g of dicumyl peroxide at room temperature and mix well to prepare a modified waste oil coating material dispersion with a viscosity of 25 mPa·s.

[0036]2) Preparation of coated slow / controlled release fertilizer

[0037] First take 2kg of granular compound fertilizer 15-15-15 with a particle size of 3mm to 4mm and place it in a fluidized fluidized bed, start it up and preheat it to 85°C; then pass the prepared modified waste oil coating material dispersion through double The fluid nozzle is sprayed onto the surface of the preheated granular compound fertilizer, the spraying speed is about 20g / min, the spraying pressure is 0.15Mpa, ...

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Abstract

The present invention discloses a modified waste oil coating material and an application of the modified waste oil coating material in coating slow / controlled release fertilizers. The modified waste oil coating material comprises, by mass, 30-70% of waste oil, 20-65% of acrylic acid hydroxy ester, 0.5-5% of a catalyst, 0.1-1% of a polymerization inhibitor, and 1-5% of a cross-linking agent, wherein the modified waste oil coating material is sprayed on the granular fertilizer surface, and heating curing is performed to obtain the coating slow / controlled release fertilizer. According to the present invention, the modified waste oil coating material has characteristics of biodegradability, wide raw material source, waste resource reutilization promotion, and reduction of harm on the environment and the human body; the preparation process has characteristics of simpleness, no organic solvent, no water, and meeting of requirements of low carbon, environmental protection and energy source saving; and application of the modified waste oil coating material to prepare the coating slow / controlled release fertilizer has characteristics of low cost, simple process, no solvent recovery equipment, no other equipment, less investment, continuous production, and strong industrialization feasibility.

Description

technical field [0001] The invention relates to recovery and reuse of waste oil, in particular to a modified waste oil coating material and its application in coated slow / controlled release fertilizers. Background technique [0002] Waste oil mainly refers to non-edible oil of poor quality, unhygienic and complex composition that is simply extracted from some waste food and edible oil. Because of its low price, its appearance and main components are similar to normal edible oil after certain treatment, so it has been used as edible oil by many speculators, seriously endangering human health and social stability. There are many channels for producing waste oil, and the output is very large. According to statistics, the amount of waste oil produced in my country accounts for about 20% to 30% of the total consumption of edible oil. It is roughly estimated that the amount of waste oil that can be produced every year is as high as 7 to 14 million tons. Therefore, finding a safe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C05G3/00
Inventor 徐祖顺颜萍陈文求
Owner HUBEI UNIV
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