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Preparation method of high-concentration low-temperature stable liquid colorant

A low-temperature stable, high-concentration technology, used in fertilizer mixtures, organic dyes, fertilization devices, etc., can solve the problems of poor storage and transportation stability of liquid colorants, easy crystallization, flocculation, low coloring strength, etc., to achieve uniform coloring effect, Rich color compatibility, good low temperature stability

Inactive Publication Date: 2017-10-13
上海染料研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the high-concentration, low-temperature stable liquid colorant provided by the present invention has low coloring strength due to the low water solubility of the pigment; the high-solubility liquid colorant has poor storage and transportation stability, and is easy to crystallize and flocculate; the high-concentration liquid colorant is in Poor stability under low temperature conditions, easy partial precipitation and other defects provide a solution, effectively overcome the above defects

Method used

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  • Preparation method of high-concentration low-temperature stable liquid colorant
  • Preparation method of high-concentration low-temperature stable liquid colorant

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Preparation of Yellow High Concentration Low Temperature Stable Liquid Colorant (1)

[0024] In a 1200L preparation pot, add 800L of Acid Yellow 23# pigment coupling solution, start stirring, heat up to 55°C and add 3.5kg of hydrochloric acid in a liquid state, adjust the pH of the solution to 4.2, keep stirring for 30 minutes, add 2kg of liquid caustic soda, and adjust the pH of the solution to 6.3 . Then add 16kg of thiobisethanol at room temperature; add 40kg of ammonium lignosulfonate as a dispersant and stir quickly evenly.

Embodiment 2

[0026] Preparation of Yellow High Concentration and Low Temperature Stable Liquid Colorant (2)

[0027] In a 1200L preparation pot, add 500L of edible yellow 5# pigment coupling solution and 300L of edible yellow 6# pigment coupling solution, start stirring, heat up to 70°C, add 3.4kg of 30% hydrochloric acid in a liquid state, adjust the pH of the solution to 4.2, and keep stirring for 30 minutes Then add 2kg of liquid caustic soda to adjust the pH of the solution to 7.0. Then add 34kg of glycerol and 30kg of diethylene glycol ether at 50°C; add 80kg of lignosulfonate sodium salt as a dispersant and stir evenly; , for packaging.

Embodiment 3

[0029] Preparation of Yellow High Concentration and Low Temperature Stable Liquid Colorant (3)

[0030] In a 1200L preparation pot, add 560L of basic yellow 11# pigment coupling solution and 240L of basic yellow 13# pigment coupling solution, start stirring, heat up to 48°C, add 3.4kg of 31% hydrochloric acid in liquid form, adjust the pH of the solution to 4.3, keep stirring After 30 minutes, 2 kg of liquid caustic soda was added to adjust the pH of the solution to 6.5. Then add 30kg of propylene glycol and 30kg of diethylene glycol ether at 55°C; add 80kg of lignosulfonate sodium salt as a dispersant and stir quickly evenly, and after the product has passed the standardization and quality control analysis and test for low-temperature anti-crystallization and anti-flocculation performance, carry out Package.

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Abstract

The preparation method of a high-concentration low-temperature stable liquid colorant disclosed by the present invention comprises the following steps: (1) selecting a suitable dye and its dye synthesis process, producing and preparing the required monoazo or disazo Colorant coupling solution for dyes, heat up the colorant coupling solution to 55°C-70°C, add hydrochloric acid solution, adjust the pH of the colorant coupling solution to ≤5.0, stir evenly, add liquid alkali to adjust the pH to 6.0-7.0 to obtain high-concentration dyeing (2) Stir the high-concentration coloring dye solution prepared in step (1) at room temperature to 60°C to form a uniform high-concentration coloring solution, then add alcohol compounds to aid in dissolution, and then add lignosulfonic acid dispersants to stabilize high Concentration coloring solution to obtain high concentration low temperature stable liquid colorant. The invention ensures the stability of the dye solution without precipitation when the high-concentration liquid colorant product is at a temperature above -7°C by adjusting the process and adding different types and proportions of co-solvents and dispersants.

Description

technical field [0001] The invention relates to the technical field of agricultural chemical fertilizer colorants, in particular to a preparation method of a liquid colorant with high concentration and low temperature stability. Background technique [0002] China is a big agricultural country, and it is also the largest country in the production and consumption of chemical fertilizers. Its output and varieties rank among the top in the world. In order to distinguish different types or varieties of fertilizers, or to maintain the consistency of hue in different batches, different types of powder colorants or liquid colorants need to be added to color fertilizers according to different production processes. [0003] At present, most of the domestic and foreign dyes and pigments are directly mixed for coloring or sprayed with water-soluble liquid colorants. These agricultural colorants can be widely used in high-tower compound fertilizers, ammonia spray compound fertilizers, ...

Claims

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Application Information

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IPC IPC(8): C09B67/10C09B67/46C09B67/22C05G3/00
CPCC09B67/0014C05G3/00C09B67/0015C09B67/0033C09B67/0069C09B67/009
Inventor 顾民乐一鸣汪海麟
Owner 上海染料研究所有限公司
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