Continuous Production System of Nano Disperse Dyes

A nano-dispersion and production system technology, applied in the direction of organic dyes, azo dyes, monoazo dyes, etc., can solve the problems of decreased dye productivity, difficulty in uniform mixing of materials, and large particle size of dyes, so as to improve the conversion rate , Avoid decomposition, precise temperature control effect

Active Publication Date: 2022-06-28
BEIJING UNIV OF CHEM TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial production, azo disperse dyes are usually carried out in batch operation in stirred tank reactors. Due to the complexity of the synthesis process of azo dyes and the limitation of the volume of the stirred tank itself, it is difficult to achieve uniform mixing between materials, resulting in dyes The decline in productivity and the large difference between batches of dyes bring inconvenience to the application of post-treatment agents for dyes
Moreover, the particle size of the dye particles synthesized in the stirred tank reactor is relatively large and cannot be directly used for dyeing.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous Production System of Nano Disperse Dyes
  • Continuous Production System of Nano Disperse Dyes
  • Continuous Production System of Nano Disperse Dyes

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0082] Example 1 Continuous production of an azo nanodisperse dye

[0083] In this embodiment, the diazonium component includes p-nitroaniline and nitrite, the diazonium reagent includes hydrochloric acid, and the coupling component includes N-ethyl-N-cyanoethylaniline and acetic acid.

[0084] The diazotization reaction process is as follows: the mixed solution of p-nitroaniline and nitrite is premixed with the hydrochloric acid solution through the premixing component, such as figure 2 As shown in the figure, it is then continuously fed into the spiral coil reactor through the pipeline to obtain the diazonium salt solution or suspension. The diazotization reaction is carried out at -5 °C to 30 °C, preferably 5 °C to 10 °C. The molar ratio of hydrogen ions of hydrochloric acid to p-nitroaniline in the diazotization reaction is Preferably 2.8:1, the molar ratio of sodium nitrite to p-nitroaniline is 1-2:1, preferably 1.07:1, and the feed flow rate is 50-300 mL / min, preferab...

example 2

[0094] Example 2 A kind of continuous preparation method of nano-scale disperse dyes

[0095] In this embodiment, the diazonium component includes p-nitroaniline and nitrite, the diazonium reagent includes hydrochloric acid, and the coupling component includes N-ethyl-N-cyanoethylaniline, acetic acid, and Dispersant.

[0096] A continuous preparation method of nano disperse dyes using supergravity is characterized in that, the method comprises the steps:

[0097] The diazotization reaction process is as follows: the mixed solution of p-nitroaniline and nitrite is premixed with the hydrochloric acid solution through the premixing component, such as figure 2 As shown in the figure, it is then continuously fed into the spiral coil reactor through the pipeline to obtain the diazonium salt solution or suspension. The diazotization reaction is carried out at -5 °C to 30 °C, preferably 5 °C to 10 °C. The molar ratio of hydrogen ions of hydrochloric acid to p-nitroaniline in the di...

example 3

[0101] Example 3 A kind of continuous preparation method of nano-scale disperse dyes

[0102] In this embodiment, the diazonium component includes p-nitroaniline and nitrite, the diazonium reagent includes hydrochloric acid, and the coupling component includes N-ethyl-N-cyanoethylaniline, acetic acid, and Dispersant.

[0103] A continuous preparation method of nano disperse dyes using supergravity is characterized in that, the method comprises the steps:

[0104] The diazotization reaction process is as follows: the mixed solution of p-nitroaniline and nitrite is premixed with the hydrochloric acid solution through the premixing component, such as figure 2 As shown in the figure, it is then continuously fed into the spiral coil reactor through the pipeline to obtain the diazonium salt solution or suspension, and the diazotization reaction is carried out at -5 °C to +30 °C, preferably 5 °C to 10 °C. The molar ratio of the hydrogen ion of hydrochloric acid to p-nitroaniline i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
angleaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a continuous production system for nano-disperse dyes. Aiming at the characteristics of easy blockage of disperse dye materials, a pre-mixed venting pipe for the feed pipe and a venting pipe for the inlet and outlet of the spiral coil are designed. The venting pipe is connected to the diazotization reaction raw material The inlet and outlet are connected to the supergravity coupling reactor. Since the venting pipe is partially equipped with a pressure relief venting pipe, the venting pipe can effectively solve the problem of material feeding blockage, and is conducive to the uniform entry of materials into the spiral tube reactor for diazotization reaction.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer disperse dyes. More specifically, it relates to a continuous production system of nano disperse dyes. Background technique [0002] Disperse dyes are special dyes for polyester fibers and acetate fibers. In industrial production, azo disperse dyes are usually carried out in a stirred tank reactor in a batch operation mode. Due to the complexity of the azo dye synthesis process and the limitation of the volume of the stirred tank itself, it is difficult to achieve uniform mixing between materials, resulting in dyestuffs. Decreased productivity and large differences between batches of dyes bring inconvenience to the application of post-treatment agents for dyes. In addition, the particle size of the dye particles synthesized in the stirred tank reactor is large and cannot be directly used for dyeing. The dye products need to be post-treated to reduce the particle size of the dye ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/01C09B29/085B01J19/18B01J19/00B01J3/04
CPCC09B29/0007C09B29/08B01J19/0046B01J19/18B01J19/0013B01J3/04B01J2219/00081
Inventor 邹海魁薛云龙孙宝昌初广文陈建峰罗勇张亮亮
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap