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Technique for preparing micro-nano reduction dyestuff

A preparation process and micro-nano technology, applied in the field of preparation of micro-nano vat dyes, can solve the problems of long ultrafine pulverization time, low pulverization efficiency and high energy consumption, and reduce the ultrafine pulverization time, long grinding time and energy consumption. high effect

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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  • Technique for preparing micro-nano reduction dyestuff

Examples

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Effect test

Embodiment 1

[0033]A preparation process for micro-nano 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. Carry out flow energy impact crushing to the mixed material obtained in the previous step with a pin mill;

[0036] c. Add a defoamer to the pulverized mixed material, and carry out ultrafine pulverization in a bidirectional rotating ball mill;

[0037] d. Use a pin mill or a high-pressure homogenizer to homogenize the mixed material obtained in the previous step.

[0038] 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 ad...

Embodiment 2

[0040] A preparation process for micro-nano vat dyes, comprising the following steps:

[0041] a. Put the vat dye, dispersant and water into the two-way rotating ball mill, carry out ball milling and mix into slurry material and pre-disperse;

[0042] B. Carry out flow energy impact crushing to the mixed material obtained in the previous step with a pin mill;

[0043] c. Add a defoamer to the pulverized mixed material, and carry out ultrafine pulverization in a bidirectional rotating ball mill;

[0044] d. Use a pin mill or a high-pressure homogenizer to homogenize the mixed material obtained in the previous step.

[0045] 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...

Embodiment 3

[0047] A preparation process for micro-nano vat dyes, comprising the following steps:

[0048] 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;

[0049] B. Carry out flow energy impact crushing to the mixed material obtained in the previous step with a pin mill;

[0050] c. Add a defoamer to the pulverized mixed material, and carry out ultrafine pulverization in a bidirectional rotating ball mill;

[0051] d. Use a pin mill or a high-pressure homogenizer to homogenize the mixed material obtained in the previous step.

[0052] 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 add...

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Abstract

A preparation technology of a micro-nanometer vat dye is characterized in that a process comprises first, adding vat dyes, dispersing agent and water in a ball grinder, ball-grinding and mixing to form slurry material and pre-dispersing, second, impacting and grinding the fluid energy of the mixture which is got through the upper step through a pin-rod-type grinder, third, adding defoaming agent in the mixture which is grinded, grinding in an ultra-fine state in a bidirectional rotating ball grinder, finally, handling the mixture which is got from the upper step in homogenization through adopting the pin-rod-type grinder or a high-pressure homogenizer. 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 process of micro-nano 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/28C09B67/04
Inventor 顾志明许崇礼李洪元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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