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Industrial production method of environment-friendly yellow color lake pigment 183 for plastics

A production method and an environmentally friendly technology, applied in the direction of organic dyes, etc., can solve the problems of poor color development, difficult unloading, hard pigment blocks, etc., and achieve low hydrophilicity, convenient unloading and high tinting strength. Effect

Active Publication Date: 2013-06-26
CROWN CHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the manufacturing process, the press filter cake is thin and sticky, so it is not easy to unload the material. It takes more than 80 minutes to unload the material, which consumes a lot of man-hours. Moreover, the pigment material obtained after drying is hard and has poor dispersibility. The pigment develops color during grinding Poor effect results in low tinting strength, making it difficult to apply in plastic systems

Method used

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  • Industrial production method of environment-friendly yellow color lake pigment 183 for plastics
  • Industrial production method of environment-friendly yellow color lake pigment 183 for plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Add 246Kg of 2-amino-4,5-dichlorobenzenesulfonic acid to the reaction kettle, add 2000Kg of water and 140Kg of liquid caustic soda with a concentration of 30wt% (the concentration of the liquid caustic soda in the following examples is the same as this example), and heat up to 30-35 ℃, stirring and reacting for 1 hour; slowly adding concentrated hydrochloric acid at 15±1℃, stirring and reacting for 30min; Sulfamic acid is removed to obtain diazonium liquid;

[0030] 2) Add 2000Kg of water, 256Kg of liquid caustic soda and 150Kg of sodium acetate into the reaction kettle, stir to dissolve, then add 271Kg of 1-(3'-sulfonic acid phenyl)-3-methyl-5-pyrazolone at 30 Stir at a temperature of ~35°C to obtain a clear liquid;

[0031] 3) Inject the diazo solution into the coupling reaction kettle at 30±1°C for coupling reaction, and stir for 60 minutes after adding the diazo solution; raise the temperature of the reaction solution to 60±1°C, and add 30% of the reaction solut...

Embodiment 2

[0034] 1) Add 246Kg of 2-amino-4,5-dichlorobenzenesulfonic acid into the reaction kettle, add 2000Kg of water and 140Kg of liquid caustic soda, heat up to 30-35°C, stir and react for 1 hour; slowly add concentrated hydrochloric acid at 15±1°C, Stir the reaction for more than 30 minutes; then slowly add 400Kg of 30% sodium nitrite aqueous solution at 0°C to carry out the diazotization reaction and stir for 1 hour, and remove the excess sodium nitrite with sulfamic acid to obtain the diazonium solution;

[0035] 2) Add 2000Kg of water, 256Kg of liquid caustic soda and 150Kg of sodium acetate into the reaction kettle, stir to clear, then add 295Kg of 1-(3'-sulfonic acid phenyl)-3-methyl-5-pyrazolone, at 30 Stir at a temperature of ~35°C to obtain a clear liquid;

[0036] 3) Inject the diazo solution into the coupling reaction kettle at 30±1°C for coupling reaction, and stir for 60 minutes after adding the diazo solution; raise the temperature of the reaction solution to 60±1°C, a...

Embodiment 3

[0038]1) Add 246Kg of 2-amino-4,5-dichlorobenzenesulfonic acid into the reaction kettle, add 2000Kg of water and 140Kg of liquid caustic soda, heat up to 30-35°C, stir and react for 1 hour; slowly add concentrated hydrochloric acid at 15±1°C, Stir the reaction for more than 30 minutes; then slowly add 400Kg of 30% sodium nitrite aqueous solution at 0°C to carry out the diazotization reaction and stir for 1 hour, and remove the excess sodium nitrite with sulfamic acid to obtain the diazonium solution;

[0039] 2) Add 2000Kg of water, 256Kg of liquid caustic soda and 150Kg of sodium acetate into the reaction kettle, stir to clear, then add 396Kg of 1-(3'-sulfonic acid phenyl)-3-methyl-5-pyrazolone, at 30 Stir at a temperature of ~35°C to obtain a clear liquid;

[0040] 3) Inject the diazo solution into the coupling reaction kettle at 30±1°C for coupling reaction, and stir for 60 minutes after adding the diazo solution; raise the temperature of the reaction solution to 60±1°C, an...

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Abstract

The invention relates to an industrial production method of an environment-friendly yellow color lake pigment 183 for plastics and belongs to the technical field of pigment synthesis. The industrial production method comprises the following steps of: based on 2-amino-4, 5-dichlorobenzenesulfonic acid as a raw material, carrying out alkali dissolution-acidification salt forming reaction and diazo-reaction to obtain a diazotization emulsion, adding 1-(3'-sulfophenyl)-3-methyl-5-pyrazolone to the diazotization emulsion, and then carrying out coupling reaction, color lake reaction and pigmentation treatment to obtain the yellow color lake pigment 183. According to the industrial production method, a coating agent is added to carry out pigment surface treatment after the color lake reaction, so that the polarity on the crystal surface of the pigment is favorably reduced, the hydrophilicity of the pigment is reduced, and the manpower hour during unloading is shortened; and the yellow color lake pigment 183 has the advantages of bulky block, bright appearance, easiness for grinding and dispersing, high tinting strength and the like; and the obtained yellow color lake pigment 183 is good in application performance and has the heat resistant temperature of being more than 300 DEG C, the tinting strength of more than 100% close to the standard in PE (polyethylene) and PVC (polyvinyl chloride) media and the tinting strength of being 108% higher than the standard in a PVC sol medium.

Description

technical field [0001] The invention belongs to the technical field of pigment synthesis, and specifically relates to a kind of 2-amino-4,5-dichlorobenzenesulfonic acid as a raw material, which is subjected to diazotization reaction under acidic and low-temperature conditions after alkali-soluble acid precipitation to form a salt, and Coupling reaction of 1-(3'-sulfonic acid phenyl)-3-methyl-5-pyrazolone, followed by lake reaction and coating agent treatment, and the industrialization of the synthesized environmentally friendly lake yellow pigment 183 for plastics production method. Background technique [0002] 2-amino-4,5-dichlorobenzenesulfonic acid (referred to as 6B acid) is an important organic pigment intermediate. The C.I.P.Y.183 (Pigment Yellow 183) toner synthesized as a diazo component is red-yellow. It is a monoazo lake type, red-yellow pigment, and belongs to the pyrazolone pigment. Because it does not contain benzidine As a substitute of P.Y.83, due to its ex...

Claims

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Application Information

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IPC IPC(8): C09B67/08C09B67/20
Inventor 杨宗泽徐亮陈奇文沈先松
Owner CROWN CHEMICAL CORP
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