Preparation method of fertilizer colorant and application method thereof

Abstract

The invention relates to a preparation method of a fertilizer colorant and an application method thereof. The preparation method comprises the following steps of: respectively dissolving water-soluble dyes such as bright red, rose red, acid blue, brilliant blue, golden yellow or lemon yellow into water; respectively adding 1-3% dispersing agent; stirring and respectively preparing into red inner colorant, blue inner colorant and yellow inner colorant for later use; respectively dissolving oil-soluble dyes such as lithol red, toluidine red, phthalocyanine blue, transparent blue, benzidine yellow or fluorescence yellow into base oil dissolvent; respectively adding the 1-3% dispersing agent; stirring and respectively preparing into red outer colorant, blue outer colorant and yellow outer colorant; directly stirring and blending the inner colorants and fertilizer raw materials; and spraying the outer colorants, so that the fertilizer is evenly colored. The preparation method can prepare the colored fertilizer which can not discolor under the functions of strong acid, strong base, strong reductant, strong oxygenant and microbe, and has the characteristics of small use amount of the colorant, stable coloration, low cost, pure color, good appearance, wide adaptability, high safety, good performance and the like.

Description

technical field [0001] The invention relates to a method for preparing and using a coloring agent, in particular to a method for preparing and using a fertilizer coloring agent, and belongs to the technical field of fertilizer dyeing. Background technique [0002] With the development of chemical technology, dyeing technology has gradually entered the field of fertilizer production technology. Some fertilizer manufacturers add some dyes or coloring agents in the process of fertilizer production. On the one hand, it is to prevent others from counterfeiting their own brands. On the one hand, it is to improve the appearance and color of fertilizers, and at the same time, it is convenient for users to intuitively identify the varieties and brands of fertilizers. The dyes or colorants used for fertilizer dyeing are divided into water-soluble and oil-soluble types. The general dyes are composed of dyes or pigments and solvents. Some solvents or dyes are not easy to degrade and wil...

AI Technical Summary

Problems solved by technology

The dyes or colorants used for fertilizer dyeing are divided into water-soluble and oil-soluble types. The general dyes are composed of dyes or pigments and solvents. Some solvents or dyes are not easy to degrade and will enter the soil and pollute the soil. Some It will be absorbed by plants and damage the human body, bringing adverse effects on people's life and health

In order to produce safer and more reliable fertilizer dyes, researchers are constantly working hard to find various natural dyes, but natural dyes are not resistant to acid, alkali, high temperature and other processing conditions, and their stability is relatively poor, which is not conducive to production Colored products with stable luster will affect product sales and other aspects