Process for preparing heavy nitrogen solution of permanent yellow G

A preparation process and technology of diazo solution, applied in azo dyes, organic dyes, chemical instruments and methods, etc., can solve problems such as unsatisfactory control parameter settings, nitric oxide and nitrogen dioxide, and human hazards

Inactive Publication Date: 2013-11-20
瑞安宝源化工有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of pigments generally includes firstly preparing diazonium liquid, and then reacting with other additives to prepare pigments. The control parameter setting in the existing diazo liquid production process is not ideal, and it is easy to produce toxic reaction between raw material dichloride and sodium nitrite. Gases such as nitric oxide and nitrogen dioxide can cause harm to people

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Dichloride beating: add 1500KG of water to the diazo tank, then add 275KG of hydrochloric acid, the concentration of hydrochloric acid is 30%, put 185KG of dichloride into the diazo tank, the dichloride is 3-3-dichlorobis Aniline hydrochloride, turn on the stirring button of the agitator, stir and beat, and add 9KG of defoamer, the defoamer is polyhydric alcohol, 1,4-butanediol, the beating time is 2 hours, add under the situation of stirring The broken ice cubes cool down the feed liquid in the diazo bucket to 0°C;

[0019] (2) For diazotization, quickly add 100KG of sodium nitrite solution into the diazo tank within 2 minutes, the concentration of sodium nitrite is 40%, keep the temperature of the material liquid at 4°C while stirring, and keep the reaction The time is 80min,

[0020] Put in 10KG of diatomite additives to remove impurities, stir for 8 minutes below 5°C, add water to make the total volume in the diazo tank reach 2700L, add sulfamic acid to remove ...

Embodiment 2

[0023] (1) Dichloride beating: add 1500KG of water to the diazo tank, then add 280KG of hydrochloric acid, the concentration of hydrochloric acid is 31%, put 180KG of dichloride into the diazo tank, the dichloride is 3-3-dichlorobis Aniline hydrochloride, turn on the stirring button of the agitator, stir and beat, and add 8KG of defoamer, the defoamer is polyhydric alcohol, neopentyl glycol, the beating time is 3 hours, add the crushed Ice cubes to cool down the feed liquid in the diazo bucket to 0°C;

[0024] (2) For diazotization, quickly add 103KG of sodium nitrite solution into the diazo tank within 2 minutes, the concentration of sodium nitrite is 37%, keep the temperature of the material liquid at 4°C while stirring, and keep the reaction The time is 80min,

[0025] Put in 10KG of diatomite additive to eliminate impurities, stir at 3°C ​​for 10 minutes, add water to make the total volume in the diazo tank reach 2800L, add sulfamic acid to remove excess sodium nitrite, a...

Embodiment 3

[0028] (1) Dichloride beating: add 1550KG of water to the diazo tank, then add 295KG of hydrochloric acid, the concentration of hydrochloric acid is 27%, put 190KG of dichloride into the diazo tank, the dichloride is 3-3-dichlorobis Aniline hydrochloride, turn on the stirring button of the agitator, stir and beat, and add 10KG of defoamer, the defoamer is polyhydric alcohol, 1,6-hexanediol, the beating time is 3 hours, add in the case of stirring The broken ice cubes cool down the feed liquid in the diazo bucket to -5°C;

[0029] (2) For diazotization, quickly add 104KG of sodium nitrite solution into the diazo tank within 2 minutes, the concentration of the sodium nitrite is 41%, and keep the temperature of the material liquid at 3°C ​​while stirring, And keep the reaction time at 90min,

[0030] Put in 12KG of diatomite additive to eliminate impurities, stir at 3°C ​​for 10 minutes, add water to make the total volume in the diazo tank reach 2850L, add sulfamic acid to remov...

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 discloses a process for preparing a heavy nitrogen solution of permanent yellow G. The process comprises the following steps of: (1) dichlorine pulping, namely adding 1,450-1,550 KG of water, 265-295 KG of 27-34% hydrochloric acid and 170-190 KG of dichlorine into a diazotization barrel, stirring, adding a de-foaming agent, pulping for at least one hour and cooling to the temperature of below zero DEG C; (2) diazotization, namely quickly adding 100-105 KG of 32-42% sodium nitrite into the diazotization barrel within 2 minutes, stirring, preserving the heat to be less than 5 DEG C, adding 8-12 KG of aid, stirring for 3-10 minutes at the temperature of less than 5 DEG C, adding water to ensure that the total volume of the diazotization barrel reaches 2,700-2,850 L, and adding sulfamic acid to remove the redundant sodium nitrite; (3) stopping stirring, and performing suction filtration. According to the process, redundant dichlorine is avoided in proportioning of the dichlorine and the hydrochloric acid, so that self-coupling reaction of the dichlorine can be avoided; the temperature of the solution is reduced to below zero DEG C, so that little toxic gas is produced.

Description

technical field [0001] The invention relates to a sub-processing technology of paint, in particular to a preparation technology of diazonium liquid of permanent yellow G. Background technique [0002] Along with the raising of living standard, pigment, paint are widely used in people's life, can be used for beautifying people's living environment. For better coating, in many places where pigments are used, in order to meet the requirements of high resolution, it is necessary to produce pigments with regular shape and good fluidity. At present, existing pigments are generally prepared by processes such as mixing, kneading, pulverizing, grading, and adding additives. The preparation of pigments generally includes firstly preparing diazonium liquid, and then reacting with other additives to prepare pigments. The control parameter setting in the existing diazo liquid production process is not ideal, and the reaction of raw materials dichloride and sodium nitrite is easy to pro...

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): C09B33/153C09B67/36C07C245/20
Inventor 张绍光林侯杰毛明学戴世全杨乾辉林昌同
Owner 瑞安宝源化工有限公司
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