Preparation method of pigment purple 3

A pigment violet and pigment technology, applied in the field of preparation of C.I. Pigment Violet 3, can solve the problems of environmental water pollution, high COD value, incomplete laking of basic violet dyes, etc., and achieve minimal environmental pollution and good weather resistance Effect

Active Publication Date: 2013-01-09
HANGZHOU HONGYAN PIGMENT CHEM
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The conventional reaction is to add the basic violet dye directly into hot water. Due to the low purity of domestic raw materials, it is difficult to completely react and easily cause environmental water pollution; in the pigmentation reaction, because no better dispersant is selected, The basic violet dye is not completely laked with the heteropolyacid, even if it takes a long time, it still cannot react completely, so that the water seepage is serious at the end of the reaction, the COD value is high, and the production process causes serious pollution to the environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of pigment purple 3

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of C.I. Pigment Violet 3 comprises the steps:

[0026] (1) Preparation of heteropolyacid:

[0027] Add 9.5 grams of sodium tungstate, 0.95 grams of sodium molybdate, and 1.43 grams of disodium hydrogen phosphate into hot water at 85°C, stir well to dissolve them completely, then add 38 grams of hydrochloric acid with a concentration of 30%, and react for 1 hour until pH To about 1.5, after the pH value is stable, prepare the heteropolyacid standby solution;

[0028] (2) Dissolution of dye

[0029] Dissolve 0.5g of glacial acetic acid in 1500g of water, heat up to 80°C, add 10g of basic violet, then add a transparent mixture of 0.2g of fatty alcohol polyoxyethylene ether and 10g of 50°C water (surfactant solution) , fully stirred to dissolve completely, reacted for 0.5h, and then lowered the temperature to 50°C to prepare the dye stock solution;

[0030] (3) Pigment laking

[0031] Filter the heteropolyacid prepared in step (1) a...

Embodiment 2

[0035] The preparation method of C.I. Pigment Violet 3 comprises the steps:

[0036] (1) Preparation of heteropolyacid:

[0037] Add 10 grams of sodium tungstate, 3 grams of sodium molybdate, and 2 grams of disodium hydrogen phosphate into hot water at 65°C, stir well to dissolve them completely, then add 4 grams of sulfuric acid with a concentration of 98%, 30 grams of sulfuric acid with a concentration of 30 % hydrochloric acid, react for 1h, until the pH reaches about 2.5, and after the pH value is stable, prepare the heteropolyacid standby solution;

[0038] (2) Dissolution of dye

[0039] Dissolve 1 gram of glacial acetic acid in 1500 grams of water, heat up to 95°C, add 10 grams of basic violet, and then add a transparent mixture of 0.2 grams of alkylphenol polyoxyethylene ether and 10 grams of water at 60°C (surfactant solution ), fully stirred to dissolve completely, reacted for 0.5h, and then lowered the temperature to 60°C to prepare the dye stock solut...

Embodiment 3

[0045] The preparation method of C.I. Pigment Violet 3 comprises the steps:

[0046] (1) Preparation of heteropolyacid:

[0047] Add 10.5 grams of sodium tungstate, 5.25 grams of sodium molybdate, and 4.2 grams of disodium hydrogen phosphate into hot water at 90°C, stir well to dissolve them completely, then add 52.5 grams of 30% hydrochloric acid, and react for 1 hour until pH To about 3.5, after the pH value is stable, prepare the heteropolyacid standby solution;

[0048] (2) Dissolution of dye

[0049] Dissolve 2 grams of glacial acetic acid in 1500 grams of water, heat up to 100°C, add 10 grams of basic violet, and then add a transparent mixture of 0.2 grams of sodium alkylsulfonate and 10 grams of 60°C water (surfactant solution), Thoroughly stir to dissolve completely, react for 0.5h, then lower the temperature to 70°C to prepare the dye stock solution;

[0050] (3) Pigment laking

[0051] Filter the heteropolyacid obtained in step (1) and add it to the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of C.I. pigment purple 3, which comprises the following steps: (1) preparing polybasic heteroacid; (2) dissolving dye; (3) making a pigment color lake; and (4) carrying out after-treatment on the pigment. The preparation method disclosed by the invention effectively solves the problem of color lake completion of the dye, so that the pigmented solution water has much lower indexes (color, COD (chemical oxygen demand) and the like), and produces slight environmental pollution in the aspect of pollution discharge. The pigment prepared by the method disclosed by the invention can be used in water-based external wall paint, has favorable light fastness and weather resistance, and can also be used in various solvent inks, water-based inks, offset printing inks and the like.

Description

technical field [0001] The invention relates to a method for preparing an organic pigment, in particular to a method for preparing C.I. Pigment Violet 3. Background technique [0002] C.I. Pigment Violet 3 is a special organic pigment, C.I. Pigment Violet 3 gives a deep purple hue, has good fastness properties, and its chemical structure belongs to triphenylmethane pigments. A pigment synthesized by dissolving Basic Violet 5BN in glacial acetic acid aqueous solution and adding the prepared heteropolyacid for laking reaction. Due to the addition of surfactants and high-efficiency dispersants in the production process, and the relatively advanced technology, the light resistance of the produced pigments can reach 7 grades, and the high temperature water resistance can reach 5 grades. The color is bright and the tinting strength is high. It is coated on paper and shines copper. , lasting and not fade, the main application areas are printing ink and paint coloring of various ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09B63/00C09B11/12
Inventor 陆建伟钮建春冯恩伟
Owner HANGZHOU HONGYAN PIGMENT CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap