Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method of disperse yellow dye

A technology for disperse yellow and dyes, which is applied in the field of preparation of quinoline disperse yellow dyes, can solve the problems of large amount of high-boiling point organic solvents, large amount of raw material phthalic anhydride, increased recovery of solvents, etc., to achieve reduced raw material consumption, convenient operation, The effect of simple process

Inactive Publication Date: 2011-12-28
ZHEJIANG LONGSHENG GROUP
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the amount of high-boiling-point organic solvent used is relatively large, and subsequent processes such as solvent recovery need to be added, and waste water is increased; in addition, the amount of raw material phthalic anhydride is also large, which wastes resources and increases waste water.

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
  • A kind of preparation method of disperse yellow dye
  • A kind of preparation method of disperse yellow dye
  • A kind of preparation method of disperse yellow dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 812g of dry 4-carboxylic acid and 769.6g of phthalic anhydride into a 4L kneader, start stirring, slowly raise the temperature, control the temperature of the material at 180-190°C, keep it warm for 2 hours, and cool down to 55°C until no bubbles are generated. °C, after the material is cooled, transfer the material to 4.8L of water, raise the temperature to 90-95 °C, keep it warm for 1-2 hours, filter, and wash the filter cake with hot water at 80 °C to pH 6.5.

Embodiment 2

[0019] Put 609g of dry 4-carboxylic acid and 666g of phthalic anhydride into a 4L kneader, start stirring, slowly raise the temperature, control the temperature of the material at 190-200°C, keep it warm for 2 hours until no bubbles are generated, then cool to room temperature, Transfer this material to 3L of water, heat up to 90-95°C, keep warm for 1-2h, filter, and wash the filter cake with hot water at 75°C to pH 6.5.

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

No PUM Login to View More

Abstract

The invention provides a preparation method for a disperse yellow E-3G. The method comprises: adding 4-carboxylic acid and phthalic anhydride to a kneading device, starting the stirring, heating to a temperature of 170-200 DEG C, holding the temperature and carrying out condensation reaction until no gas is released; cooling to the temperature less than 60 DEG C after completing the reaction, then transferring the condensation compound in the kneading devices into water, then heating to the temperature of 90-100 DEG C, then holding for 1-3 h; carrying out filtering, and washing the filter cake through the water to obtain the filter cake of the disperse yellow dye. With the present invention, during the preparation process for the disperse yellow E-3G, the raw materials such as the 4-carboxylic acid and the phthalic anhydride are directly subjected to the condensation reaction in the kneading device, such that the disadvantage of the requirement of adding a plurality of an organic solvent DMF in the existing condensation process is overcome, the feeding ratio of the 4-carboxylic acid to the phthalic anhydride is reduced, such that the raw material consuming is substantially reduced, the production cost is saved, the waste water discharging is reduced; the method has characteristics of simple process, convenient operation and suitability to popularization and application; significant economic benefits and social benefits are provided.

Description

(1) Technical field [0001] The invention relates to a preparation method of quinoline disperse yellow dyes. (2) Background technology [0002] Disperse Yellow E-3G (C.I. Disperse Yellow 54) 2-(3-hydroxy-2-quinolyl)indan-1,3-dione, its structural formula is as follows: [0003] [0004] Disperse Yellow E-3G is mainly used for the dyeing or printing of polyester, it can also be used for dyeing or printing of nylon, acetate fiber and polyester / wool blended textiles, and it is also suitable for dyeing polyester superfine fiber. Disperse Yellow E-3G is an E-type high-quality bright yellow disperse dye. When dyed alone, the light fastness can reach 6-7 grades, and other properties can reach 4-5 grades. It is Disperse Yellow RGFL (C.I. Disperse Yellow 23, the dye has Good dyeing performance, but because it is easy to decompose and produce carcinogenic aromatic amines under certain conditions, it can no longer meet the increasingly stringent environmental protection requirements...

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
IPC IPC(8): C09B25/00
Inventor 高怀庆张海斌梁伟徐健康张桂香钟利锋
Owner ZHEJIANG LONGSHENG GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com