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Pollution-free preparation technology of direct fast yellow D-RL

A preparation process, pollution-free technology, applied in the direction of disazo dyes, etc., can solve the problems of increasing product costs, environmental pollution, etc., and achieve the effect of reducing the difficulty of processing

Active Publication Date: 2009-11-18
TIANJIN YADONG CHEM & DYESTUFF FACTORY
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AI Technical Summary

Problems solved by technology

However, a large amount of waste water is produced in the traditional production process of the dye, which will cause serious environmental pollution if discharged without treatment
And the treatment of process wastewater will increase the cost of the product

Method used

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  • Pollution-free preparation technology of direct fast yellow D-RL
  • Pollution-free preparation technology of direct fast yellow D-RL

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and preferred embodiment, the specific implementation mode that provides according to the present invention is described in detail as follows:

[0025] Such as figure 1 Shown, a kind of direct sun-fast yellow D-RL pollution-free preparation process is characterized in that the implementation steps are as follows:

[0026] (1) Preparation of yellow bass for dissolution, for 3-(4-amino-2-methylphenyl)azo-1,5-naphthalene disulfonic acid dissolution:

[0027] Add 200L of water to a 300L reaction kettle, add 21.05Kg, 3-(4-amino-2-methylphenyl)azo-1,5-naphthalene disulfonic acid, beat for 30 minutes, then add soda ash to adjust the pH=6~6.5, At this moment, the material is a transparent solution;

[0028] (2) Cyanuric chloride beating:

[0029] Add 50L of water to a tank with a volume of 700L, then add 4.7Kg of cyanuric chloride, adjust the temperature t=0-5°C with ice cubes, start stirring and beating for 45-60 minutes for la...

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Abstract

The invention discloses a polyurea formaldehyde coated with organic tin compound microcapsule and a preparation method thereof. The invention adopts an in-situ polymerization method, takes urea and formaldehyde as main wall material raw materials, takes a catalyst organic tin compound as a main capsule core raw material, takes water as a reaction medium, selects surface active agents of different varieties and adjusts the pH value of a reaction solution system to 4 to 5 by controlling a certain rotating speed, the reaction temperature is 30 DEG C to 50 DEG C, and the polyurea formaldehyde coated with organic tin compound microcapsule is obtained by synthesis after the reaction is carried out for 2 to 4 hours; and white microcapsule particles are obtained by carrying out water / acetone washing, leaching and drying on the reaction product. The polyurea formaldehyde coated with organic tin compound microcapsule synthesized by adopting the in-situ polymerization method has simple technology operation and easy control, the yield of synthesized microcapsule products is 85% to 95%, and the polyurea formaldehyde coated with organic tin compound microcapsule can be used for the control of the solidification reaction of thermosetting resin and the toughening and modification of correlative materials simultaneously.

Description

technical field [0001] The invention relates to a dye preparation process, in particular to a pollution-free preparation process of direct light fast yellow. Background technique [0002] At present, the competition in the direct dye industry is becoming increasingly fierce, and people's requirements for the color of textiles are also increasing, and the requirements for dyes are also getting higher and higher. Environmentally friendly dyes and salt-free liquid dyes with bright colors and high dye uptake are very popular. [0003] In the traditional production process of direct dyes, the process of salting out, filtration and concentration is generally carried out; the purpose is to desalt, remove unreacted raw materials, intermediates and secondary dyes, and remove water to obtain dyes with the required concentration and purity. It is then dried in an oven to make powdered dyes or directly prepared as liquid dyes. Practice has proved that the impurities and salt brought in...

Claims

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Application Information

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IPC IPC(8): C09B33/02
Inventor 张超水张宝文李新勇王淑娜李国栋
Owner TIANJIN YADONG CHEM & DYESTUFF FACTORY
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