CN104250453A - Preparation method of direct red brown RN - Google Patents

Abstract

A preparation method of direct red brown RN comprises the steps of DNS acid diazotization, sulfanilic acid diazotization, a coupling reaction, roller drying, crushing and mixing packaging. The method can effectively reduce the output of byproducts in the production process in order to improve the output and the quality of a product and effectively protect environment.

Description

The making method of a kind of direct red brown RN

(1) technical field

The present invention relates to a kind of substantive dyestuff production technique, particularly relate to the making method of a kind of direct red brown RN.

(2) background technology

At present, direct red brown RN is one of main brown dye kind.Be mainly used in cotton, viscose fiber and cotton, viscose fiber and silk, the dyeing of wool intertexture BLENDED FABRIC and direct printing.But in the production process of direct red brown RN, existing technique seed output and quality of product when producing is not high, the generation causing byproduct in building-up process rises, and these byproducts can reduce the quality of product simultaneously also can to environment.This making method of inventing the direct red brown RN related to effectively can reduce the generation of byproduct in process of production, thus improves the seed output and quality of product, makes environment obtain effective protection simultaneously.Also do not find the appearance of like product in the market, correlation technique data also finds no open.

(3) summary of the invention

The object of the invention is the weak point in order to overcome existing substantive dyestuff production technique, and provide the making method of a kind of direct red brown RN.

Technical scheme of the present invention realizes like this.

The making method of a kind of direct red brown RN of this programme, concrete making step is as follows:

(1) DSD acid diazotization

In diazonium still, add gauge water, add quantitative DSD acid, hydrochloric acid quantitatively adds in reactor through scale tank, stir 1 hour, add appropriate ice and be cooled to 20 DEG C, added quantitative Sodium Nitrite with 30 minutes and stir 30 minutes, diazotization reaction occurs, and for subsequent use, reaction equation is as follows:

(2) Sulphanilic Acid diazotization

In diazonium still, add gauge water, add quantitative Sulphanilic Acid, hydrochloric acid quantitatively adds in reactor through scale tank, adds appropriate ice, adds quantitative Sodium Nitrite, and react for subsequent use after 1 hour, reaction equation is as follows:

(3) coupled reaction

Quantitative mphenylenediamine is added in Sulphanilic Acid diazo liquid, 15 DEG C are kept to stir 1 hour, generate Sulphanilic Acid conjugates, then DSD acid diazo liquid was added wherein with 30 minutes, add quantitative sheet alkali, soda ash adjustment pH=8, stir 2 hours, generate direct red brown RN, by volume 10% salt adding is saltoutd, and reaction equation is as follows:

(4) roller drying

By the dyestuff slurries of preparation by Cemented filling to the material fluid bath of roller dryer, carry out roller drying with indirect steam, dried tail gas introduces spray absorber purifying treatment by blower fan, and cleaning of off-gas is by 1 15 meters of aiutages discharge;

(5) pulverize

Dried dyestuff drops into pulverizer and pulverizes rear for subsequent use, and the dust that crushing process produces is collected by cloth bag, and tail gas is by 1 15 meters of aiutages discharge;

(6) mixture packaging

The dyestuff crushed is dropped into mixture tank, adds Sodium sulfate anhydrous.min(99) and dust laying oil mixture according to each chromaticity index, the finished product obtained is by bottom drain hole pack packaging.In order to control the uncontrollable discharge produced in wrapping process, at mixture tank discharge port, blower unit being installed and the dust produced in blowing wrapping process is introduced sack cleaner.

Usefulness of the present invention is: the present invention effectively can reduce the generation of byproduct in process of production, thus improves the seed output and quality of product, makes environment obtain effective protection simultaneously.

(4) embodiment

Below in conjunction with embodiment, the invention will be further described.

The making method of a kind of direct red brown RN of embodiment, concrete making step is as follows:

(1) DSD acid diazotization

In diazonium still, add gauge water, add quantitative DSD acid, hydrochloric acid quantitatively adds in reactor through scale tank, stirs 1 hour, adds appropriate ice and be cooled to 20 DEG C, adds quantitative Sodium Nitrite stir 30 minutes with 30 minutes, and diazotization reaction occurs, for subsequent use.

(2) Sulphanilic Acid diazotization

In diazonium still, add gauge water, add quantitative Sulphanilic Acid, hydrochloric acid quantitatively adds in reactor through scale tank, adds appropriate ice, adds quantitative Sodium Nitrite, reacts for subsequent use after 1 hour.

(3) coupled reaction

Quantitative mphenylenediamine is added in Sulphanilic Acid diazo liquid, 15 DEG C are kept to stir 1 hour, generate Sulphanilic Acid conjugates, then DSD acid diazo liquid was added wherein with 30 minutes, add quantitative sheet alkali, soda ash adjustment pH=8, stirs 2 hours, generate direct red brown RN, by volume 10% salt adding is saltoutd.

(4) roller drying

By the dyestuff slurries of preparation by Cemented filling to the material fluid bath of roller dryer, carry out roller drying with indirect steam, dried tail gas introduces spray absorber purifying treatment by blower fan, and cleaning of off-gas is by 1 15 meters of aiutages discharge;

(5) pulverize

Dried dyestuff drops into pulverizer and pulverizes rear for subsequent use, and the dust that crushing process produces is collected by cloth bag, and tail gas is by 1 15 meters of aiutages discharge;

(6) mixture packaging

The dyestuff crushed is dropped into mixture tank, adds Sodium sulfate anhydrous.min(99) and dust laying oil mixture according to each chromaticity index, the finished product obtained is by bottom drain hole pack packaging.In order to control the uncontrollable discharge produced in wrapping process, at mixture tank discharge port, blower unit being installed and the dust produced in blowing wrapping process is introduced sack cleaner.

Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.

Claims (1)

1. a making method of direct red brown RN, is characterized in that:

Concrete making step is as follows:

(1) DSD acid diazotization

In diazonium still, add gauge water, add quantitative DSD acid, hydrochloric acid quantitatively adds in reactor through scale tank, stir 1 hour, add appropriate ice and be cooled to 20 DEG C, added quantitative Sodium Nitrite with 30 minutes and stir 30 minutes, diazotization reaction occurs, and for subsequent use, reaction equation is as follows:

(2) Sulphanilic Acid diazotization

In diazonium still, add gauge water, add quantitative Sulphanilic Acid, hydrochloric acid quantitatively adds in reactor through scale tank, adds appropriate ice, adds quantitative Sodium Nitrite, and react for subsequent use after 1 hour, reaction equation is as follows:

(3) coupled reaction

Quantitative mphenylenediamine is added in Sulphanilic Acid diazo liquid, 15 DEG C are kept to stir 1 hour, generate Sulphanilic Acid conjugates, then DSD acid diazo liquid was added wherein with 30 minutes, add quantitative sheet alkali, soda ash adjustment pH=8, stir 2 hours, generate direct red brown RN, by volume 10% salt adding is saltoutd, and reaction equation is as follows:

(4) roller drying

By the dyestuff slurries of preparation by Cemented filling to the material fluid bath of roller dryer, carry out roller drying with indirect steam, dried tail gas introduces spray absorber purifying treatment by blower fan, and cleaning of off-gas is by 1 15 meters of aiutages discharge;

(5) pulverize

Dried dyestuff drops into pulverizer and pulverizes rear for subsequent use, and the dust that crushing process produces is collected by cloth bag, and tail gas is by 1 15 meters of aiutages discharge;

(6) mixture packaging

The dyestuff crushed is dropped into mixture tank, adds Sodium sulfate anhydrous.min(99) and dust laying oil mixture according to each chromaticity index, the finished product obtained is by bottom drain hole pack packaging.In order to control the uncontrollable discharge produced in wrapping process, at mixture tank discharge port, blower unit being installed and the dust produced in blowing wrapping process is introduced sack cleaner.