A kind of liquid colorant and its application
A coloring agent and liquid technology, applied in application, layering/coating fertilizer, nitrogen fertilizer, etc., can solve problems such as easy aggregation of water-soluble colorants, misleading farmers, poor coloring effect, etc.
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Embodiment 1
[0031] Put 0.8kg of coloring agent (lemon yellow), 1.2kg of industrial grade urea, and 1kg of industrial grade ammonium nitrate into a 20L plastic tank, then inject 8kg of water, turn on the stirring paddle, and stir at 20°C for 60s to obtain lemon Yellow liquid colorant. The colorant is transported to the fertilizer mixer by a diaphragm pump for spraying, so that the water-soluble fertilizer can be evenly dyed in color. See Table 1 and Figure 1-2 The heavy metal content and color comparison between the fertilizer using the coloring agent provided in this example (the dosage of tartrazine is 0.1‰) and the fertilizer using the conventional coloring agent (commercially available, the dosage is 3‰).
[0032] Table 1
[0033]
[0034] It can be seen from Table 1 that the heavy metal content (introduced by other raw materials) of the water-soluble fertilizer using the colorant provided in this example is much smaller than that of the water-soluble fertilizer using conventional ...
Embodiment 2
[0036] Put 0.8kg of coloring agent (bright blue), 1.4kg of industrial grade urea, and 0.8kg of industrial grade ammonium nitrate into a 20L plastic tank, then inject 7kg of water, turn on the stirring paddle, and stir at 30°C for about 80s to obtain bright Blue liquid colorant. The coloring agent is transported to the fertilizer mixer by a diaphragm pump for mixing, so that the water-soluble fertilizer is evenly dyed in color.
Embodiment 3
[0038] Put 1kg of coloring agent (Big Red), 1kg of industrial grade urea, and 1kg of industrial grade ammonium nitrate into a 20L plastic tank, then inject 9kg of water, turn on the stirring paddle, and stir at 25°C for 120s to obtain Dahong liquid coloring agent. Use a diaphragm pump to transport the colorant (the amount of bright red is 0.05‰ of the weight of the fertilizer) to the fertilizer mixer for spraying, so that the water-soluble fertilizer can be evenly dyed in color.
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