Direct spray drying preparation technology of direct fast black 22

A preparation process and a technology of fast tanning, applied in the direction of organic dyes, etc., can solve the problems of increasing product cost, environmental pollution, etc., and achieve the effect of reducing the difficulty of processing

Inactive Publication Date: 2009-11-18
TIANJIN YADONG CHEM & DYESTUFF FACTORY
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 env

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
  • Direct spray drying preparation technology of direct fast black 22
  • Direct spray drying preparation technology of direct fast black 22

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] 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:

[0027] like figure 1 Shown, a kind of direct sunfast black 22 direct spray drying preparation process is characterized in that the implementation steps are as follows:

[0028] (1) 4,4-diaminodiphenylamine-2-sulfonic acid diazotization:

[0029] Put 3000~3100L of pure water into the reaction tank, add 209Kg of 4,4-diaminodiphenylamine-2-sulfonic acid, stir and beat for 1 hour; then add 412Kg of 30% hydrochloric acid, add ice cubes to control the solution temperature t=0~5℃ ; Quickly add 107Kg of sodium nitrite within 10 to 15 minutes. At this time, it is detected to be blue with Congo red test paper and starch potassium iodide test paper; at a temperature of t = 4 to 6 ° C for 1 to 1.5 hours, the total volume of the solution is V = 5000 to 5500L, neutralize excess nitrous acid wi...

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 relates to a direct spray drying preparation technology of direct fast black 22. The technology is characterized in that the technology comprises the following implementation steps: firstly, diazotization is carried out on 4, 4-diamino-diphenylamine-2-sulfonic acid, and then the 4, 4-diamino-diphenylamine-2-sulfonic acid is coupled with dissolved r acid under an alkaline condition; after hydrochloric acid and sodium nitrite are added into the primary coupling product for carrying out secondary diazotization, secondary coupling is carried out on the mixture with the pH of 9 to 9.5 and lentine, and the coupling temperature is controlled at t of 10 DEG C to 15 DEG C; and after the reaction is completed, the mixture is delivered to a drying tower for direct spray drying, and then the final product is obtained. In the invention, the traditional production technology condition is changed, the procedures of salting out, filter pressing and pulping are omitted, and the optimized technology directly transfers primary pulp after secondary coupling to the drying tower for spray drying. Zero discharge of industrial wastewater is achieved. Compared with a traditional technology, the yield is greatly increased. The invention effectively increases the yield and the coloring intensity of dye, reduces energy consumption and simplifies the technology; and with steady quality, pollution reduction effect and cheap price, the invention has very strong competitive strength and very extensive market prospect.

Description

technical field [0001] The invention relates to a dye preparation process, in particular to a direct sunfast black 22 direct spray drying preparation process. 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 i...

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): C09B67/36C09B67/06
Inventor 张超水张宝文李新勇王淑娜李国栋
Owner TIANJIN YADONG CHEM & DYESTUFF FACTORY
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