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Preparation method of C.I. pigment yellow 83

A technology of pigment yellow and dichlorobenzidine, which is applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve problems such as increasing cost and reducing application performance of pigments, reducing energy consumption and improving diazotization yield. rate, reducing the effect of ammonia nitrogen value and COD

Inactive Publication Date: 2016-06-08
SHANGYU DAXIN COLOR CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, the method of dissolving and re-precipitating is adopted to improve the utilization rate of coupling components, but it will increase a lot of cost, and the precipitated pigment yellow is placed in a strong alkali solution, which will reduce the application performance of the pigment.

Method used

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  • Preparation method of C.I. pigment yellow 83
  • Preparation method of C.I. pigment yellow 83
  • Preparation method of C.I. pigment yellow 83

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 100kg of sulfuric acid into the diazonium pot, start stirring, add 460kg of 28% nitrosyl sulfuric acid, cool down to 20°C, start to add 253kg of 3,3'-dichlorobenzidine, the feeding time is 2 to 3 hours, and the feeding temperature is 15~ 20°C, after adding, keep warm for 2 hours, the temperature is 15-20°C.

[0039] Add 1200kg of water and 3000kg of ice into the dilution pot, start stirring, start diazo dilution, keep the temperature at 5-10°C, dilute for 1-2 hours, after the dilution is complete, keep warm for 15 minutes, add 8kg of urea and 6kg of activated carbon, and stir for 15 Minutes, start filter press standby.

[0040] Add 500kg of water, 10kg of sodium lignosulfonate, and 8kg of Pingpingjia into the beating pot, start stirring at a stirring speed of 600rpm, add 540kg of 2,5-dimethoxy-4-chlorobisacetanilide, and beat for 1 to 2 hours. Then enter into the coupling pot through a high-pressure homogenizer, add 500kg of water and start stirring in the coupling p...

Embodiment 2

[0042] Add 45kg of sulfuric acid into the diazonium pot, start stirring, add 515kg of 25% nitrosyl sulfuric acid, cool down to 20°C, start to add 253kg of 3,3'-dichlorobenzidine, the feeding time is 2 to 3 hours, and the feeding temperature is 15~ 20°C, after adding, keep warm for 2 hours, the temperature is 15-20°C.

[0043] Add 1500kg of water and 3500kg of ice into the dilution pot, start stirring, start diazo dilution, keep the temperature at 5-10°C, dilute for 1-2 hours, after the dilution is complete, keep warm for 15 minutes, add 5kg of sulfamic acid and 2.5kg of silicon alginate, stirred for 15 minutes, and began to press filter for later use.

[0044] Add 800 kg of water, 5.4 kg of MF, and 5.4 kg of OP-10 into the beating pot, start stirring at a stirring speed of 500 rpm, put in 515.9 kg of 2,5-dimethoxy-4-chlorobisacetanilide, beat for 1 to 2 hours, and then pass The high-pressure homogenizer enters the coupling pot, and the coupling pot is added with 500kg of wate...

Embodiment 3

[0046] Add 275kg of sulfuric acid into the diazonium pot, start stirring, add 286kg of 45% nitrosyl sulfuric acid, cool down to 20°C, start adding 253kg of 3,3'-dichlorobenzidine, the feeding time is 2 to 3 hours, and the feeding temperature is 15~ 20°C, after adding, keep warm for 2 hours, the temperature is 15-20°C.

[0047] Add 1500kg of water and 3500kg of ice into the dilution pot, start stirring, start diazo dilution, keep the temperature at 5-10°C, dilute for 1-2 hours, after the dilution is complete, keep warm for 15 minutes, add 12.5kg of urea and 7.5kg of clay, Stir for 15 minutes, start pressure filtration for later use.

[0048] Add 800kg of water, 27.0kg of NNO, and 27.0kg of Pingpingjia into the beating pot, start stirring at a stirring speed of 800rpm, put in 570.2kg of 2,5-dimethoxy-4-chlorobisacetanilide, beat for 1 to 2 hours, and then pass The high-pressure homogenizer enters the coupling pot, and the coupling pot is added with 500kg of water and started to...

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Abstract

The invention provides a preparation method of C.I. pigment yellow 83. The method comprises the following steps: carrying out diazotization on nitrosyl sulfuric acid, pulping coupling components, homogenizing under high pressure, and carrying out coupling reaction from low temperature to high temperature. The finally prepared C.I. pigment yellow 8 has the advantages of uniform particle size, soft particles, excellent light fastness, excellent heat resistance, excellent solvent resistance and excellent migration resistance.

Description

technical field [0001] The invention relates to the technical field of pigment preparation, in particular to a preparation method of C.I. Pigment Yellow 83. Background technique [0002] With the development of fine chemicals, the development of organic pigments is extremely rapid. The annual output of organic pigments has doubled from 210,000 tons in 2000 to 468,400 tons in 2010. Organic pigments are widely used in many industries such as printed matter, automobile manufacturing industry, coating industry, polymer material processing industry and textile fiber. Yellow organic pigment (Pigment Yellow) is one of the most popular varieties. From the 1950s to the present, researchers have continuously improved the synthesis process and application performance of organic pigment yellow, gradually expanding its application field. [0003] There are many kinds of organic pigment yellows, mainly including isoindolinone pigments, benzimidazolone pigments, benzidine yellow pigment...

Claims

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Application Information

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IPC IPC(8): C09B35/035C09B35/10
CPCC09B35/035C09B35/105
Inventor 陈建新孙庆伟倪越彪章立新方标
Owner SHANGYU DAXIN COLOR CHEM CO LTD
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