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P-chlorophenol-o-azo beta-naphthol chromium complex and its preparing process and application

A technology of p-chlorophenol and chlorophenol, which is applied in the field of p-chlorophenol-o-azo β-naphthol chromium complex and its preparation, to achieve the effect of excellent fastness and bright color

Inactive Publication Date: 2002-11-13
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are fewer cheap dyes suitable for the above-mentioned different types of dyeing objects

Method used

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  • P-chlorophenol-o-azo beta-naphthol chromium complex and its preparing process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0009] Embodiment: Put 0.2mol of p-chloro-o-aminophenol and 8 times of water in a three-necked flask, 2.2 times of 36% hydrochloric acid, stir and dissolve, add 0.2mol of sodium nitrite dropwise at 5°C to dissolve in 2 times the amount of aqueous solution, stirred for 1.5 hours after dripping to obtain a diazonium salt solution; in another three-necked flask, add 0.22mol of β-naphthol, 0.2 times the amount of NaCO 3 , 13 times the amount of water, 2.6 times the amount of 20% NaOH solution, stirred and dissolved, then added dropwise the prepared diazonium salt solution, and adjusted the pH with 20% NaOH or hydrochloric acid to 8.5-9, 20-25 Stir at °C for 2 hours, and at 70°C for 20 minutes, cool, filter, and dry the product under an infrared lamp to constant weight to obtain a red azo dye with a yield of 95%.

[0010] Dissolve 0.2 mol of chromium formate in 2.5 times the amount of ethylene glycol and 4.2 times the amount of ethylene glycol monoethyl ether, add the above red azo...

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Abstract

A process for preparing p-chlorophenol-p-azo beta-naphthol chromium complex includes such steps as reaction of p-chloro-o-aminophenol on sodium nitrite under acidic condition to obtain diazonium salt, coupling reaction with beta-naphthol to obtain p-chlorophenol-o-azo beta-naphthol, and reaction with chromium formate at 125-128 deg.C to obtain the said complex. The product is a cheap neutral purple dye for wool, silk, chemical fibre and lether and can also be used as antistatic reagent.

Description

technical field [0001] The invention relates to a p-chlorophenol-o-azo β-naphthol chromium complex and a preparation method thereof. Background technique [0002] There are many types of dyes, and their range of applications is also very wide. Different dyes have different usage requirements, some are used for wool, some are used for chemical fiber, some are used for plastic, and some are used for leather. However, there are fewer and cheaper dyes suitable for the above-mentioned different types of dyeing objects. Contents of the invention [0003] The present invention provides a kind of dyestuff-p-chlorophenol-o-azo β-naphthol chromium complex and preparation method thereof at the above problems. , Plastic, etc. dyeing. [0004] The technical scheme provided by the utility model is: p-chlorophenol-o-azo β-naphthol chromium complex, its structural formula is: [0005] The preparation method of the above-mentioned p-chlorophenol-o-azo β-naphthol chromium complex is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C245/02C07F11/00C09B45/16
Inventor 张治民梁屹朱双全
Owner WUHAN UNIV