Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing permanent yellow G

A technology of permanent yellow and components, applied in the direction of organic dyes, etc., can solve the problems of high cost and pollution, and achieve the effect of reducing production cost and low CDO of wastewater

Inactive Publication Date: 2012-10-10
WUJIANG TUNCUN PIGMENT PLANT
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing permanent yellow G that solves the problem of high cost and serious pollution when preparing permanent yellow G

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
  • Method for preparing permanent yellow G

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment: as figure 1 Shown is a preparation method of Everlasting Yellow G, which comprises the following steps: diazo components, hydrochloric acid, and water are beaten together for 20-35 minutes and then cooled to 0 degrees with ice, and the diazo components are composed of Prepared from 3,3'-dichlorobenzidine (DCB), water, hydrochloric acid, sodium nitrite, activated carbon and iodized castor oil, add sodium nitrite solution, stir for 1 hour, then add a small amount of clay, stir for 10 minutes , and then filtered and reserved for later use; the coupling component was dissolved and transparent in the dissolution tank and then put into the coupling tank. The coupling component was prepared from acetyl acetanilide, sodium carbonate, water and acetic acid. Adjust the temperature to 10°C-20°C and the volume of the coupling component is 20 times that of the coupli...

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 method for preparing permanent yellow G. The method comprises the following steps of: beating a diazo component, hydrochloric acid and water, adding ice, reducing the temperature to 0 DEG C, adding a solution of sodium nitrite, stirring for 1 hour, adding a small amount of argil, stirring for 10 minutes, and filtering for later use; dissolving a coupling component in a dissolving kettle until the coupling component is transparent, putting into a coupling kettle, adjusting the temperature and volume, adding a dilute solution of acetic acid, performing acid precipitation until the PH value is 6.5 to 7, adding a buffering agent into a spare material obtained after filtration and the coupling component which is subjected to acid precipitation, coupling, and after-treating; and entering a filter press and washing, drying and grinding a filter cake, and packaging to obtain a product. By the method for preparing the permanent yellow G, the production cost is effectively reduced; the chemical oxygen demand (COD) of generated wastewater is low; and the method is environment-friendly and energy-saving.

Description

technical field [0001] The invention relates to a preparation method of a pigment, in particular to a preparation method of permanent yellow G. Background technique [0002] At present, the production process of Everlasting Yellow G is generally prepared through processes such as mixing, kneading, crushing, grading, and adding additives. This type of preparation method has high cost and serious pollution. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing permanent yellow G which solves the problem of high cost and serious pollution when preparing permanent yellow G. [0004] The solution taken by the present invention to solve its technical problems is: a preparation method of Everlasting Yellow G, which method comprises the following steps: [0005] a. Beat the diazo component, hydrochloric acid and water together for 20-35 minutes, add ice and cool down to 0 degrees; [0006] b. Add s...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20
Inventor 梅跃新田亚东
Owner WUJIANG TUNCUN PIGMENT PLANT