Novel dye dispersant and preparation method thereof

A dye dispersant and reagent technology, which is applied in the field of new dye dispersant and its preparation, can solve the problems of high price of thermally unstable naphthalenesulfonate, etc., and achieve the effect of ideal comprehensive performance, high activity and high reactivity

Inactive Publication Date: 2014-04-23
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal instability of lignosulfonate and the high price of naphthalenesulfonate make it important to develop non-toxic, thermally stable and inexpensive dye dispersants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] ① Crush the rice straw into a powder with a fineness of 80 meshes, then add 50g of the powder, 200g of phenol and catalyst sulfuric acid (the amount of sulfuric acid added is calculated as 1mmol per 1g of straw powder mass) into a three-necked glass flask, and place it in the previously prepared In the oil bath heated to 160°C, install the condenser, start the electromagnetic stirring device to liquefy the straw, keep the heat for 2 hours, remove the oil bath, and cool to room temperature;

[0022] ②Add methanol diluent, and carry out suction filtration by vacuum suction filtration, pour the obtained filtrate into a flask, add magnesium oxide in a ratio of 1:1 to concentrated sulfuric acid molar ratio, stir for 30min, and then suction filtration;

[0023] ③ The obtained filtrate (filtrate after twice filtration) was vacuum distilled at 80°C and 210°C for 3 hours respectively to remove the solvent methanol and unreacted phenol, and cooled to obtain solid biomass liquefact...

Embodiment 2

[0027] ① First, crush the corn stalks into 40-mesh granules, add 30g of granules, 150g of phenol and catalyst phosphoric acid (the amount of phosphoric acid added is calculated as 3mmol per 1g of straw powder mass) into a three-necked glass flask, and place it in the previously preheated to 150°C In the oil bath, install the condenser, start the electromagnetic stirring device to liquefy the corn stalks, the liquefaction time is 2.5h, after the reaction time is reached, remove the oil bath, cool the reactant, dilute and wash the liquefied product with methanol;

[0028] ② Add methanol diluent, and use vacuum suction filtration to carry out suction filtration, pour the obtained filtrate into a flask, add magnesium oxide in a ratio of 3:2 to concentrated phosphoric acid molar ratio, stir for 30 minutes, and then suction filtration;

[0029] ③ The obtained filtrate was vacuum distilled at 80°C and 210°C for 3 hours respectively, cooled to obtain a solid biomass liquefaction, which...

Embodiment 3

[0033] ① Catalyze wood powder into 100 mesh powder, add 50g powder, 150g phenol and catalyst oxalic acid (the amount of oxalic acid added is calculated as 3mmol per 1g of straw powder mass) into a three-necked glass flask, and place it in the previously preheated to 130°C In the oil bath, install the condenser, start the electromagnetic stirring device to liquefy the wood flour, the liquefaction time is 2h, after the reaction time is reached, remove the oil bath, and cool down;

[0034] ② Add ethanol diluent, and use the method of vacuum suction filtration to carry out suction filtration, pour the obtained filtrate into the flask, slowly add calcium oxide in a ratio of 1:1 to the molar ratio of oxalic acid, stir for 30 minutes, and then suction filtration;

[0035] ③ The obtained filtrate (filtrate after two filtrations) was vacuum distilled at 80°C and 210°C for 3 hours respectively to remove solvent ethanol and unreacted phenol, cooled to obtain solid biomass liquefaction, an...

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PUM

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Abstract

The invention relates to a method for preparing a novel dye dispersant. The method comprises a step of reacting a biomass liquefied substance, a sulfonating agent and an aldehyde reagent. The method is characterized in that the biomass liquefied substance is prepared by a method comprising the following steps of: (1) performing heat preservation reaction on a phenolic reagent, biomass powder and an acid catalyst for 1 to 4 hours at the temperature between 70 and 180 DEG C, and cooling to room temperature, wherein the biomass powder is at least one of rice straws, rice hulls, corn straws, wood meal, hazelnut shells and tea residue; and (2) adding an organic solvent for diluting, filtering to remove the acid catalyst in the filtrate, separating, and thus obtaining the biomass liquefied substance. The dye dispersant can substitute chemical dispersants prepared from petroleum mineral resources, reduce the use of increasingly exhausted mineral resources and meet the basic requirements of national sustainable development.

Description

technical field [0001] The invention relates to a novel dye dispersant and a preparation method thereof, in particular to preparing the dye dispersant from the solid obtained after liquefaction of biomass. Background technique [0002] With the development of modern dyeing process, vat dyes and disperse dyes have come out one after another, they need to be dyed at high temperature, which also puts forward higher requirements for dye dispersants, such as low toxicity, good thermal stability and dispersibility . At present, the main dye dispersants are naphthalene sulfonate and lignin sulfonate. However, the thermal instability of lignosulfonate and the high price of naphthalenesulfonate make it important to develop non-toxic, thermally stable and inexpensive dye dispersants. [0003] In recent years, it is an important aspect of environmental protection and sustainable development strategy to replace the currently widely used petroleum with huge yield, renewable and biodegr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07G1/00B01F17/50C09K23/50
Inventor 孙岩峰高政孙雪楠
Owner DALIAN POLYTECHNIC UNIVERSITY
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