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Preparation method for high energy saving environmental protection type phthalocyanine green pigment

An energy-saving and environmentally friendly, phthalocyanine green technology, applied in the direction of organic dyes, optical filters, etc., can solve the problems of recycling, environmental pollution, and high risk, and achieve improved product dispersion, improved gloss and color strength, and high brightness Effect

Inactive Publication Date: 2012-11-21
南通乐彩颜料化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Solvent treatment method: because solvents such as alcohol, benzene, tetrahydrofuran or DMF are generally used in the production process, not only is it dangerous, but also needs to be recycled, and the residual part will also pollute the environment

Method used

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  • Preparation method for high energy saving environmental protection type phthalocyanine green pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] a. A reaction kettle with a volume of 5 cubic meters, put 500 kilograms of phthalocyanine green pigment crude product and 1500 kilograms of 100% sulfuric acid, keep stirring for 8 hours, the temperature is 65 ℃ ~ 110 ℃, add 25 kilograms of ammonium salt and 25DMF; put the obtained acid mixture into 30 tons of water, the water temperature is 30 ℃ ~ 90 ℃, stir evenly; then filter and wash until the pH value is neutral, dry to obtain a block pigment, or crush to obtain a powder pigment, and obtain the pigment derivatives of 250 kg;

[0024] b. Mix 20 kilograms of the derivative of the pigment with 180 kilograms of untreated crude phthalocyanine green pigment, and mix evenly to obtain 200 kilograms of high-energy-saving and environment-friendly phthalocyanine green pigment.

[0025] Compare the high-energy-saving and environment-friendly phthalocyanine green pigment with the untreated crude phthalocyanine green pigment, as shown in Table 1:

[0026]

[0027] Table 1.

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Abstract

The present invention provides a preparation method for a high energy saving environmental protection type phthalocyanine green pigment, wherein a crystallization stabilizer and a solvent are added in a preparation process. The concrete process comprises: adding a phthalocyanine green pigment crude product and an acid in a reaction kettle, stirring, and adding a crystallization stabilizer, an organic solvent and the like during an acid treatment process; adding the resulting acid mixture to water, and uniformly stirring; carrying out filtration water washing until the pH value is close to a neutral pH value, and drying to obtain a bulk pigment, or crushing to obtain a powder pigment, wherein a derivative of the pigment is obtained; adding the derivative to a untreated phthalocyanine green pigment crude product according to a certain proportion to carry out mixing, wherein a high energy saving environmental protection type phthalocyanine green pigment composition is obtained after carrying out uniform mixing. The high energy saving environmental protection type phthalocyanine green pigment prepared by the method of the present invention has high brightness and high contrast, can meet applications in traditional industries, and can further be used for color filters of liquid crystal photoresists.

Description

technical field [0001] The invention relates to a method for preparing an organic pigment, in particular to a method for preparing a high-energy-saving and environment-friendly phthalocyanine green pigment. Background technique [0002] Phthalocyanine pigments are widely used in the fields of inks, coatings and plastics due to their superior heat resistance and weather fastness. The general pigmentation methods include acid treatment, grinding, solvent treatment and so on. [0003] The acid-soluble method is to use the property that the crude product can be dissolved in concentrated sulfuric acid, dissolve it, and then precipitate crystals to obtain α-type pigments with uniform and fine particles. In order to control the agglomeration of particles, surface treatment can be carried out, such as adding rosin soap, surfactants, pigment derivatives and so on. [0004] Grinding method, ball mill, kneader, etc. can be used to separate the agglomerated particles with strong shear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20G02B5/20
Inventor 张聪聪胡磊
Owner 南通乐彩颜料化工有限公司
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