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Preparation method of permanent purple pigment

A technology of permanent violet and pigments, applied in organic dyes, etc., can solve the problems of low quality of permanent violet pigments, difficult recovery of crystal conversion solvents, etc.

Active Publication Date: 2018-11-13
银川百泓新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a preparation method of permanent violet pigment to solve the problems of low quality of permanent violet pigment and difficult recovery of crystal conversion solvent

Method used

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  • Preparation method of permanent purple pigment
  • Preparation method of permanent purple pigment

Examples

Experimental program
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preparation example Construction

[0030] refer to figure 1 , the embodiment of the present application provides a preparation method of permanent violet pigment, comprising the following steps:

[0031] S1: ball mill 600 parts by mass of the crude permanent violet product for 20-50 hours to obtain pre-abrasive material;

[0032] The crude product of permanent violet is a dark green powder, which is a kind of α-type crystal. The α-type crystal has poor stability and large particles. Therefore, the coloring power of the crude product is low, so it is not suitable for use as a commercial pigment. It must be processed by pigmentation. Reduce its particle size and transform it into β-type crystals with stable performance, strong tinting strength and bright color.

[0033] The crude everlasting violet is put into a bedroom ball mill, and ball milled under the condition of cooling water to reduce the particle size of the crude everlasting violet.

[0034] Among them, the bedroom ball mill is a conventional ball mil...

Embodiment 1

[0053] S11: put 600 parts by mass of the crude permanent violet product into a bedroom ball mill, and perform ball milling under the condition of cooling water for 20 hours to obtain a pre-abrasive material;

[0054] S12: Add 550 parts by mass of n-butanol and 4000 parts by mass of water to the pre-abrasive material, and reflux for 5 hours to obtain a pre-abrasive material for crystal conversion;

[0055] S13: washing the crystal-transforming pre-abrasive with water and then evaporating to dryness to obtain a dry product of the crystal-transforming pre-abrasive;

[0056] S14: adding 8% dilute hydrochloric acid to the dry pre-abrasive material for crystal transformation to obtain an acidified product;

[0057] 8% dilute hydrochloric acid can react well with iron filings, so as to remove iron filings in dry pre-abrasive materials for crystal transformation. If the mass fraction of hydrochloric acid is too high, it will cause waste of hydrochloric acid resources; at the same tim...

Embodiment 2

[0067] refer to figure 2 , figure 2 It is a flow chart of another permanent violet pigment preparation method provided in the examples of this application.

[0068] S21: ball milling 600 parts by mass of the crude permanent violet product for 30 hours to obtain a pre-abrasive material;

[0069] S22: Add 500 parts by mass of n-butanol and 5000 parts by mass of water to the pre-abrasive material, and reflux for 3 hours to obtain a pre-abrasive material for crystal conversion;

[0070] S23: washing the crystal-transforming pre-abrasive with water and then evaporating to dryness to obtain a dry product of the crystal-transforming pre-abrasive;

[0071] S24: adding 8% dilute hydrochloric acid to the dry pre-abrasive material for crystal transformation to obtain an acidified product;

[0072] S25: filtering the acidified product to obtain a filter cake of the acidified product;

[0073] S26: Adding water to the acid-washed product filter cake disperses at high speed to form a ...

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Abstract

The invention discloses a preparation method of a permanent purple pigment. The preparation method of the permanent purple pigment comprises ball-milling, by weight part, 600 parts of permanent purplecrude products for 20-50 h to obtain pre-milled materials; adding 500-550 parts of n-butyl alcohol and 4000-5000 parts of water into the pre-milled materials, and reflowing the mixture for 3-5 hoursto obtain crystal-transformed pre-milled materials; washing and then evaporation-drying the crystal-transformed pre-milled materials obtain dried crystal-transformed pre-milled materials; adding diluted hydrochloric acid into the dried crystal-transformed pre-milled materials to obtain acidified materials; filtering the acidified materials to obtain an acidified material filter cake; at high speeddispersing the acidified material filter cake into water to obtain a slurry, and secondary-filtering the slurry to obtain a finished product filter cake; drying the finished product filter cake to obtain the permanent purple pigment. By adding the diluted hydrochloric acid into the dried crystal-transformed pre-milled materials to remove impurities produced during ball milling, the preparation method of the permanent purple pigment can reduce the conductivity of the permanent purple pigment, avoid polymerization of the permanent purple pigment and reduce the viscosity of the permanent purplepigment; besides, serving as crystal transformation solvent, the n-butyl alcohol is relatively low in toxicity and easy to recover, thereby being beneficial to cost saving, and meanwhile, through reflowing of n-butyl alcohol aqueous solution, the permanent purple pigment can be high in tinting strength and saturation in an water-based ink system.

Description

technical field [0001] The present application relates to the technical field of pigment preparation, in particular to a preparation method of permanent violet pigment. Background technique [0002] Permanent purple light bright, strong tinting power, good migration resistance and dispersion, not only acid resistance, alkali resistance, solvent resistance, but also excellent light resistance, heat resistance, weather resistance, widely used in coatings, plastics, rubber , leather, ink, paint, etc. Like other organic pigments, permanent violet is always distributed in the coloring medium in the form of fine particles when applied. The physical factors such as the crystal form, shape, size and surface state of the pigment particles will affect the reflection, absorption and scattering of light, thus affecting Color light, tinting strength, hiding power and dispersibility will also affect its light resistance, heat resistance, weather resistance and other properties. [0003]...

Claims

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Application Information

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IPC IPC(8): C09B67/20
CPCC09B67/0061C09B67/0096
Inventor 赵先波杨青明李泽荣仲俊宇
Owner 银川百泓新材料科技有限公司
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