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Preparation method of C.I. pigment yellow 12

A technology of pigment yellow and acetoacetanilide, which is applied in chemical instruments and methods, organic dyes, azo dyes, etc., can solve the problems of high cost and increase of wastewater COD, reduce energy consumption, increase diazotization yield, The effect of reducing salty wastewater

Inactive Publication Date: 2016-06-15
SHANGYU DAXIN COLOR CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the diazo coupling process, the process of heating and cooling is adopted, and the coupling components are first dissolved and then acidified with acetic acid and buffered with sodium acetate. On the one hand, the cost will be higher, and on the other hand, the COD of the wastewater will be increased.

Method used

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  • Preparation method of C.I. pigment yellow 12
  • Preparation method of C.I. pigment yellow 12
  • Preparation method of C.I. pigment yellow 12

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 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.

[0040] Add 1500kg 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, when the dilution is complete, keep warm for 15 minutes, add 6kg of urea and 5kg of activated carbon, and stir After 15 minutes, press filter for standby use.

[0041] Add 1500kg of water into the dissolving pot, start stirring, and add 150kg of trisodium phosphate at room temperature until completely dissolved. Then add 370kg of N-acetoacetanilide and stir until completely dissolved.

[0042] Then first add 10kg of water into the microreactor, turn on the stirring of the microreaction and freeze the b...

Embodiment 2

[0046] Add 240kg of sulfuric acid into the diazonium pot, start stirring, add 322kg of 40% 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.

[0047] Add 1200kg 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, when the dilution is complete, keep warm for 15 minutes, add 7kg of urea and 6kg of activated carbon, and stir After 15 minutes, press filter for standby use.

[0048] Add 1200kg of water into the dissolving pot, start stirring, and add 334.5kg of disodium hydrogen phosphate at room temperature until completely dissolved. Then add 371.7kg of N-acetoacetanilide and stir until completely dissolved.

[0049] Then first add 12kg of water to the microreactor, start the stirring of the microreaction and freeze...

Embodiment 3

[0053] Add 45kg of sulfuric acid into the diazonium pot, start stirring, add 515kg of 25% 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.

[0054] Add 1500kg 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, when the dilution is complete, keep warm for 15 minutes, add 5.6kg of urea and 2.5kg of activated carbon , stirred for 15 minutes, and started pressure filtration for subsequent use.

[0055] Add 1500kg of water into the dissolving pot, start stirring, and add 120kg of trisodium phosphate at room temperature until completely dissolved. Then add 370kg of N-acetoacetanilide and stir until completely dissolved.

[0056] Then first add 10kg of water into the microreactor, turn on the stirring of the microre...

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Abstract

The invention provides a preparation method of C.I. pigment yellow 12. The preparation method comprises the following steps: carrying out diazotization by the use of nitrosyl sulfuric acid, reacting in a microreactor and reacting in a coupling vessel for coupling so as to finally prepare the C.I. pigment yellow 12. The product has advantages of uniform particle size, soft particle, excellent brightness, strong tinting strength, good light resistance and good transparency and covering power.

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 12. Background technique [0002] With the development of fine chemicals, the development of organic pigments is extremely rapid. The annual output of organic pigments has increased from 210,000 tons in 2000 to 468,400 tons in 2010, which has doubled. 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 pigments are 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] The benzidine yellow series organic pigments were put into the market in the late 1930s and early 1940s, and developed very fast. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20C09B35/035
CPCC09B67/0065C09B35/035
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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