Production process of water-based velvet aniline black

A production process, aniline-sensitive technology, applied in the production process field of water-based cashmere-sensitive nigrosine, can solve the problems of reducing the effect of nigrosine dyeing, inability to recycle and reuse, and unbalanced proportioning, so as to improve environmental protection and benefit The effect of production and popularization, and reduction of production cost

Inactive Publication Date: 2021-03-12
浙江众达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the production process of nigrosine, most of them are prepared by direct mixing reaction of original raw materials, and in the existing raw material reaction structure, the proportioning ratio is unbalanced, so that a lar...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of production technology of water-based cashmere feeling nigrosine, this production technology comprises the steps:

[0049] P1, put aniline solid waste, acidic compound and oxidant into the reactor, carry out oxidation reaction, obtain reaction mixture;

[0050] P2, the reaction mixture is subjected to vacuum distillation to obtain a distillation mixture;

[0051] P3, the distillation mixture is mixed with nitrobenzene, and then condensation reaction is carried out in a condensation reactor to obtain a nigrosine mixture with excess aniline;

[0052] P4, put the nigrosine mixture into the acidification reaction kettle, add acidic solution, carry out acidification reaction, then carry out centrifugal filtration, obtain nigrosine product and waste water;

[0053] P5. Add the nigrosine product into the isopropanol solvent, and stir evenly for 15 to 20 minutes to obtain the nigrosine solution;

[0054] P6, drop into the PU resin of 30% mass percent in the nigrosine...

Embodiment 2

[0068] A kind of production technology of water-based cashmere feeling nigrosine, this production technology comprises the steps:

[0069] P1, put aniline solid waste, acidic compound and oxidant into the reactor, carry out oxidation reaction, obtain reaction mixture;

[0070] P2, the reaction mixture is subjected to vacuum distillation to obtain a distillation mixture;

[0071] P3, the distillation mixture is mixed with nitrobenzene, and then condensation reaction is carried out in a condensation reactor to obtain a nigrosine mixture with excess aniline;

[0072] P4, put the nigrosine mixture into the acidification reaction kettle, add acidic solution, carry out acidification reaction, then carry out centrifugal filtration, obtain nigrosine product and waste water;

[0073] P5. Add the nigrosine product into the isopropanol solvent, and stir evenly for 15 to 20 minutes to obtain the nigrosine solution;

[0074] P6, drop into the PU resin of 28% mass percent in the nigrosine...

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PUM

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Abstract

The invention discloses a production process of water-based velvet aniline black, which comprises the following steps: p1, adding aniline solid waste, an acidic compound and an oxidant into a reactionkettle, and carrying out oxidation reaction to obtain a reaction mixture; p2, carrying out reduced pressure distillation on the reaction mixture to obtain a distillation mixture; p3, carrying out condensation reaction to obtain an aniline black mixture containing excessive aniline; p4, carrying out an acidification reaction, and then carrying out centrifugal filtration to obtain an aniline blackproduct and wastewater; p5, obtaining an aniline black solution; p6, adding 25%-35% by mass of PU resin into the aniline black solution, uniformly stirring, and standing for 20-30 minutes to obtain astanding solution; p7, weighing 20%-25% of fluff powder, putting the fluff powder into the standing solution, and stirring at a constant speed until the fluff powder is fully dispersed to obtain a mixed solution; and p8, obtaining the velvet aniline black. According to the invention, by treating and recycling wastewater, the environment-friendly effect is greatly improved, and production, popularization and application are facilitated.

Description

technical field [0001] The invention relates to the technical field of nigrosine, in particular to a production process of water-based cashmere-feeling nigrosine. Background technique [0002] In the current industrial production, nigrosine, as a chemical dye, has the characteristics of strong coloring, low dispersion and good light absorption, and is widely used in various fields for dyeing. [0003] However, in the production process of nigrosine, most of them are prepared by direct mixing reaction of original raw materials, and in the existing raw material reaction structure, the proportioning ratio is unbalanced, so that a large waste of raw materials is caused due to incomplete reaction, and it cannot be carried out. It is recycled and reused without post-processing the product, which reduces the effect of nigrosine dyeing. A new production process needs to be proposed. Contents of the invention [0004] The purpose of the present invention is to solve the shortcomin...

Claims

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Application Information

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IPC IPC(8): C09B67/02C09B17/02
CPCC09B67/0097C09B17/02
Inventor 朱磊
Owner 浙江众达新材料有限公司
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