Modified lignin dispersant of disperse dye and preparation process thereof

A disperse dye and a preparation technology, which is applied in the field of modified lignin disperse dye dispersant and its preparation, can solve the problems of high cost and poor heat resistance stability, achieve low cost, improve heat resistance stability, and reduce production costs Effect

Active Publication Date: 2011-07-27
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, improve the added value of lignin and solve the problems of poor heat resistance and high cost of traditional disperse dye dispersants, and provide a modified lignin disperse dye dispersant and its preparation process

Method used

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  • Modified lignin dispersant of disperse dye and preparation process thereof
  • Modified lignin dispersant of disperse dye and preparation process thereof

Examples

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preparation example Construction

[0046]The preparation method of the described pulping black liquor is: select one or more of bamboo, bagasse, rice straw, wheat straw, imperial bamboo grass, Achnatherum splendens, Qu Liu, oak, poplar, reed, eucalyptus, birch, masson pine The first is to prepare pulping black liquor by alkali method or sulfate method. The solid content of the black liquor is 8% to 75%, the lignin content is 9% to 45%, and the density is 1.13 to 1.51 g / ml.

[0047] The oxidant is one or more of potassium permanganate, hydrogen peroxide, potassium ferrate, sodium peroxide, potassium persulfate, sodium persulfate, ammonium persulfate, and sodium hypochlorite.

[0048] The aldehyde compound is one or more of formaldehyde, acetaldehyde, glutaraldehyde, acrolein, succinaldehyde, melamine formaldehyde, paraformaldehyde and paraformaldehyde.

[0049] The anionic etherifying agent is one or more of ethylene oxide, propylene oxide, epichlorohydrin, hexadecane bromide, and monochloroacetic acid.

[0050...

Embodiment 1

[0053] 1) Raw materials and formulations of this example (unit - kilogram):

[0054] Alkaline bamboo pulping black liquor (mass fraction 75%): 450.0 kg

[0055] Hydrogen peroxide: 5.0 kg

[0056] Formaldehyde: 60.0 kg

[0057] Ethylene oxide: 18.0 kg

[0058] Dimethylamine: 78.0 kg

[0059] Sodium sulfite: 180.0 kg

[0060] Water: 209.0 kg

[0061] 2) Process steps and process parameters

[0062] The preparation of the present invention is carried out under normal pressure:

[0063] First preheat the reactor to 40°C, add 450.0 kg of pulping black liquor with a mass fraction of 45% calculated, 5.0 kg of hydrogen peroxide, react for 10 min, add 60.0 kg of formaldehyde, continue the reaction for 1 h, then raise the temperature to 90 ℃, then add 18.0 kg of ethylene oxide, 78.0 kg of dimethylamine, react for 0.5 h, and finally add a mixture of 180.0 kg of sodium sulfite and 209.0 kg of water, react for 1.5 h, cool down and discharge, the prepared product is dark brown The l...

Embodiment 2

[0065] 1) Raw materials and formulations of this example (unit - kilogram):

[0066] Alkali pulping black liquor (mixture of bamboo and bagasse, mass ratio 6:4, solid content of concentrated black liquor 8%): 740.0 kg

[0067] Potassium permanganate: 10.0 kg

[0068] Acetaldehyde: 30.0 kg

[0069] Propylene oxide: 10.0 kg

[0070] Ethylenediamine: 26.0 kg

[0071] Sodium metabisulfite: 80.0 kg

[0072] Water: 104.0 kg

[0073] 2) Process steps and process parameters

[0074] The preparation of the present invention is carried out under normal pressure:

[0075] First preheat the reactor to 60°C, add 740.0 kg of pulping black liquor with a mass fraction of 40% calculated, 10.0 kg of potassium permanganate, react for 10 min, add 30.0 kg of acetaldehyde, and continue the reaction for 0.5 h Raise the temperature to 100°C, then add 10.0 kg of ethylene oxide and 26.0 kg of ethylenediamine, react for 0.5 h, and finally add a mixture of 80.0 kg of sodium metabisulfite and 104.0...

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Abstract

The invention relates to a modified lignin dispersant of a disperse dye and a preparation process thereof. The dispersant of the disperse dye comprises the following raw materials in parts by mass: 45.0-74.0 parts of pulping black liquid, 0.5-4.0 parts of oxidant, 3.0-8.0 parts of aldehydes, 0.5-5.4 parts of anion etherifying agent, 2.6-20.0 parts of amines, 8.0-18.0 parts of sulfonating agent and 10.0-30.0 parts of water. In the preparation process, black liquid produced in pulping industry is directly utilized to prepare the dispersant of the disperse dye, wherein the thermal stability of the dispersant at the temperatures of 130 DEG C and 150 DEG C is above level 4, the staining property of chinlon, terylene and cotton is above level 4, and the dispersion force of the dispersant is greater than 95%; on the basis that the cost of the product is greatly reduced, performances such as the dispersion force, the thermal stability and the like of the product are improved; the 'three wastes' are not discharged in the whole production process; and the high-value utilization of lignin is realized; and therefore, the preparation process is a clean and environment-friendly process.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a modified lignin disperse dye dispersant and a preparation process thereof. Background technique [0002] In today's world, the reserves of oil and natural gas resources are limited, and their research, development and utilization have an increasingly serious impact on the earth's ecological environment, which has prompted the vigorous development of polymer materials that use natural resources as raw materials. Lignin is one of the most abundant and renewable natural polymer resources in nature. Land plants in the world can produce 50 billion tons of lignin every year, of which 50 million tons of industrial lignin are produced in the cooking waste liquid of the pulp and paper industry. At present, my country's pulping and papermaking industry is dominated by alkaline and kraft pulping. Some large pulping and papermaking enterprises can use alkali recovery technology t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/38
Inventor 刘明华芮方歆刘以凡林兆慧
Owner FUZHOU UNIV
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