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Method for preparing ultra-fine reduction dyestuff

A dye and ultrafine crushing technology, which is applied in the direction of organic dyes, can solve the problems of low crushing efficiency, high energy consumption, and long ultrafine crushing time, and achieve the effects of long grinding time, high energy consumption, and reduced energy consumption of dyes

Active Publication Date: 2008-07-09
XUZHOU KAIDA FINE CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultra-fine crushing takes a long time, high energy consumption and low crushing efficiency

Method used

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  • Method for preparing ultra-fine reduction dyestuff

Examples

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Embodiment 1

[0029] A preparation method of superfine vat dyes, comprising the following steps:

[0030] a. Put the vat dye, dispersant and water into the one-way rotary ball mill, and perform ball milling to mix into a slurry material and pre-disperse;

[0031]b. Add defoamer to the pulverized mixed material, and carry out superfine pulverization in a bidirectional rotating ball mill. Vat dyes are filter cakes or dry products of filter cakes after pressure filtration of raw dyes in the dye manufacturing process. The dispersant is sodium methylene naphthalene sulfonate dispersant: dispersant MF, dispersant CNF or dispersant CS. The mass ratio of the vat dye to the dispersant is 1:0.5, and the solid content of the mixed material after adding water reaches 20%. The grinding medium in the ball mill described in step a is ceramic beads, glass beads, zirconia beads, quartz sand or pebbles with a diameter of 5 mm, the mixing pre-dispersion time is 20 minutes, the grinding temperature is 5 °C, ...

Embodiment 2

[0033] A preparation method of superfine vat dyes, comprising the following steps:

[0034] a. Put the vat dye, dispersant and water into the one-way rotary ball mill, and perform ball milling to mix into a slurry material and pre-disperse;

[0035] b. Add defoamer to the pulverized mixed material, and carry out superfine pulverization in a bidirectional rotating ball mill.

[0036] Vat dyes are filter cakes or dry products of filter cakes after pressure filtration of raw dyes in the dye manufacturing process. Dispersants are lignosulfonate dispersants: synthetic sodium lignosulfonate MS, modified sodium lignosulfonate, dispersant M9, dispersant M10, dispersant M13 or dispersant M15. The mass ratio of the vat dye to the dispersant is 1:4, and the solid content of the mixed material after adding water reaches 55%. The grinding medium in the ball mill described in step a is ceramic beads, glass beads, zirconia beads, quartz sand or pebbles with a diameter of 50 mm, the mixing ...

Embodiment 3

[0038] A preparation method of superfine vat dyes, comprising the following steps:

[0039] a. Put the vat dye, dispersant and water into the one-way rotary ball mill, and perform ball milling to mix into a slurry material and pre-disperse;

[0040] b. Add defoamer to the pulverized mixed material, and carry out superfine pulverization in a bidirectional rotating ball mill.

[0041] Vat dyes are filter cakes or dry products of filter cakes after pressure filtration of raw dyes in the dye manufacturing process. The dispersant is sodium methylene naphthalene sulfonate dispersant: dispersant MF, dispersant CNF or dispersant CS. The mass ratio of the vat dye to the dispersant is 1:3, and the solid content of the mixed material after adding water reaches 45%. The grinding medium in the ball mill described in step a is ceramic beads, glass beads, zirconia beads, quartz sand or pebbles with a diameter of 30 mm, the mixing pre-dispersion time is 10 hours, the grinding temperature is...

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Abstract

A process for preparing ultra-fine vat dye is characterized in that the process comprises first, adding vat dye, dispersing agent and water in a one-way rotating ball grinder, ball-grinding and mixing to form slurry material and pre-dispersing, second, adding defoaming agent in the mixed material after being grinded, grinding in an ultra-fine state in a bidirectional rotating ball grinder. The technical process which is adopted by the new technique is that different equipment and technical processes are chosen to effectively grind to reach a best effect of grinding according to the particle distribution and physical characteristics of pulp-shaped material in different stages, and a technical cycle period is between 12 hours to 48 hours. The traditional technique utilizes unchangeable apparatuses and technique to grind various dyes with different structures and performances, and the new technique utilizes various changeable and adjustable apparatuses and technique to find a best grinding process aiming at various dyes with different structures and performances.

Description

1. Technical field [0001] The invention belongs to the technical field of dye processing, in particular to a preparation method of superfine vat dyes. 2. Background technology [0002] Prior art: the technique of superfine pulverization is mainly divided into (1) abrasive micropowder production technique. The raw material minerals that can be used to process micropowder abrasives mainly include silicon carbide, white corundum, brown corundum and garnet. With the development of refined processing technology in various industries and the adjustment of the international industrial structure, the amount of micropowder abrasives widely used in the polishing industry is increasing, and the export volume is also increasing year by year. The fine processing of micropowder abrasives has broad development prospects. Abrasive processing is characterized by hard materials, high equipment wear, and a narrow particle size distribution. In order to prevent scratches on the surface of the...

Claims

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Application Information

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IPC IPC(8): C09B67/28C09B67/04C09B67/06
Inventor 顾志明李洪元许崇礼李振奎刘宏英李凤生姜炜苏顺利邓国栋毕可宇杨毅付萍邵彤李剑郭效德魏家荣
Owner XUZHOU KAIDA FINE CHEM CO LTD
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