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Disazo reactive yellow dye and its preparation method and application

A technology of reactive yellow and disazo, applied in reactive dyes, azo dyes, dyeing methods, etc., can solve the problems of unfavorable environmental protection, high pollution, etc., reduce the use of inorganic salts, high reactivity, avoid heavy metals and carcinogenicity The effect of aromatic amine exceeding the standard

Active Publication Date: 2022-05-20
HUBEI COLOR ROOT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the problems of high pollution and unfavorable environmental protection in the printing and dyeing industry at this stage, the application provides a disazo reactive yellow dye and its preparation method and application

Method used

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  • Disazo reactive yellow dye and its preparation method and application
  • Disazo reactive yellow dye and its preparation method and application
  • Disazo reactive yellow dye and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of disazo reactive yellow dye, its structural formula is as (I)-1:

[0035]

[0036] The disazo reactive yellow dye is tested by the domestic reactive golden yellow RNL as a standard. The shade is reddish and brilliant, and the strength is 215%. It is suitable for exhaust dyeing, continuous dyeing and printing of cellulose fibers.

[0037] The present embodiment also provides the preparation method of this disazo active yellow dye, comprising the following steps:

[0038] a. Add sodium m-bisaminobenzenesulfonate with a purity of 80% and a percent weight of 126.12g to 1000ml of water, raise the temperature to 35°C under stirring, then add 100g of sodium chloride, keep the pH=7.2, and stir for 30min until solid The substance dissolves to obtain a clear solution;

[0039] b. Control the temperature at 35°C, add m-chlorosulfonylbenzoyl chloride with a percent weight of 76g to the clear solution obtained in step a at a uniform speed within 2h, carry out the acylat...

Embodiment 2

[0047] A kind of disazo reactive yellow dye, its structural formula is as (I)-1:

[0048]

[0049] This example also provides the preparation method of the disazo reactive yellow dye, which differs from Example 1 in that in step b, the temperature is controlled at 37° C. during the acylation reaction.

[0050] After testing, the analytical content of meta-bisacylate obtained in the process of preparing disazo reactive yellow dye in this example is ≧69.1%, HPLC purity ≧95.5%, meta-bis ≤0.76%, bis-acylated meta-bis ≤1.75%, others ≤2%.

Embodiment 3

[0052] A kind of disazo reactive yellow dye, its structural formula is as (I)-1:

[0053]

[0054] This example also provides the preparation method of the disazo reactive yellow dye, which differs from Example 1 in that in step b, the temperature is controlled at 40° C. during the acylation reaction.

[0055] After testing, the analysis content of meta-bisacylate obtained in the process of preparing disazo reactive yellow dye in this example is ≧69.3%, HPLC purity ≧95.1%, meta-bis ≤0.74%, bis-acylated meta-bis ≤1.78%, others ≤1.95%.

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Abstract

The application relates to the field of reactive dyes, and specifically discloses a disazo reactive yellow dye and its preparation method and application. The preparation method of the disazo active yellow dye comprises the following steps: a. prepare sodium bisaminobenzenesulfonate solution, b. sodium bisaminobenzenesulfonate and chlorosulfonylbenzoyl chloride carry out acylation reaction to obtain metabisamide compounds; diazotization reaction of para-ester and sodium nitrite to obtain para-ester diazonium salt; The composition / product of the present application The composition can be used for exhaust dyeing, continuous dyeing and cold stacking, printing and wet short steaming process on cellulose fibers, it has high color fixing rate, high perspiration fastness, good light fastness Degree and washing fastness and green environmental protection.

Description

technical field [0001] The application relates to the field of reactive dyes, more specifically, it relates to disazo reactive yellow dyes and their preparation methods and applications. Background technique [0002] Reactive Orange 107 is a commonly used vinyl sulfone golden yellow dye, which can be used for conventional dyeing and printing of cellulose fibers, and can also be used for cold pile dyeing, resist printing and discharge dyeing. It has a wide range of uses and is a common and economical vinyl sulfone golden yellow dye . [0003] However, reactive orange 107 is a monovinyl sulfone type active group and a monoazo structure, with low directness and low color fixation rate, and commercial reactive orange 107 dyes produce high COD and high chroma containing a large amount of inorganic salts during the dyeing and printing process. Waste water and three wastes are difficult to deal with, which is not conducive to environmental protection. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B62/513D06P1/384D06P3/66
CPCC09B62/513D06P1/384D06P3/666
Inventor 刘子轩刘行刘振国沈巍华曾令新
Owner HUBEI COLOR ROOT TECH CO LTD
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