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Lignin-based anion-cation type high-molecular surface active agent and preparation method thereof

A technology of surfactants, anions and cations, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve problems such as unpreparable, prone to flocculation and precipitation, improve adsorption performance and application performance, and reduce aqueous solution The ability of surface tension, the effect of easy operation and control

Active Publication Date: 2014-11-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the technical problem that flocculation and precipitation are very easy to occur when polymer anion and cationic surfactants are compounded to prepare polymer anion and cationic surfactants, and polyoxyethylene chains are introduced into lignosulfonate molecules. Hydrophilic chains are used to prepare lignosulfonate polyoxyethylene ether grafts, and then use this SL-PEO molecule containing a hydrophobic skeleton and a hydrophilic long-chain structure to perform anion-cation compounding with a quaternary ammonium cationic surfactant to prepare lignin Anionic and cationic polymer surfactants

Method used

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  • Lignin-based anion-cation type high-molecular surface active agent and preparation method thereof
  • Lignin-based anion-cation type high-molecular surface active agent and preparation method thereof
  • Lignin-based anion-cation type high-molecular surface active agent and preparation method thereof

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Embodiment 1

[0033] (1) Heat 200 grams of polyethylene glycol 600 to 40°C, add 1 gram of antimony pentafluoride catalyst, stir and mix evenly, slowly add 10 grams of epichlorohydrin dropwise, and complete the dropwise addition within 30 minutes. Afterwards, react at 50 ℃ for 1h to obtain epichlorohydrin-polyethylene glycol 600 intermediate;

[0034] (2) 100 grams of sodium lignosulfonate (in terms of weight percentage, solid content is 95%) mixed with water to prepare a solution with a mass percentage concentration of 30%, slowly drip the ring prepared in step (1) at 70 ° C. Oxychloropropane-Polyethylene Glycol 600 intermediate, dropwise added within 1.5h, after the dropwise addition, reacted at 80°C for 2h, while adding dropwise a sodium hydroxide solution with a mass percentage concentration of 15% to adjust the pH of the reaction solution Maintain the pH between 12 and 13, adjust the pH of the reaction solution to 7.0 after the reaction, and cool to room temperature to obtain a sodium l...

Embodiment 2

[0037] (1) Heat 100 grams of polyethylene glycol 2000 to 60°C to melt, add 3 grams of antimony pentachloride catalyst, stir and mix evenly, slowly add 15 grams of epichlorohydrin, dropwise within 60 minutes, drop After completion, react at 40° C. for 2 hours to obtain a modified epichlorohydrin-polyethylene glycol 2000 intermediate;

[0038] (2) 100 grams of ammonium lignosulfonate (in terms of weight percentage, solid content is 95%) mixed with water to prepare a solution with a mass percentage concentration of 40%, slowly drip the ring prepared in step (1) at 60 ° C. Oxychloropropane-Polyethylene Glycol 2000 intermediate, dropwise added within 1h, after the dropwise addition, reacted at 70°C for 3h, while adding dropwise a sodium hydroxide solution with a mass percentage concentration of 15% to adjust the pH of the reaction solution to maintain between 12 and 13, adjust the pH of the reaction solution to 6.0 after the reaction, and cool to room temperature to obtain a lignos...

Embodiment 3

[0041] (1) Warm up 100 grams of polyethylene glycol 600 to 50°C, add 3 grams of tetrabutylammonium bromide catalyst, stir and mix evenly, slowly add 25 grams of epichlorohydrin dropwise, and finish the dropwise addition within 60 minutes. After the addition is complete, react at 50° C. for 2 h to obtain the epichlorohydrin-polyethylene glycol 600 intermediate;

[0042] (2) 100 grams of sodium lignosulfonate (in terms of weight percentage, solid content is 95%) mixed with water is a solution with a mass percentage concentration of 40%, and slowly drips the ring prepared in step (1) at 70 ° C. Oxychloropropane-Polyethylene Glycol 600 intermediate, the dropwise addition is completed within 1h, after the dropwise addition, react at 80°C for 2h, and at the same time dropwise add a sodium hydroxide solution with a mass percentage concentration of 15% to adjust the pH of the reaction solution to maintain Between 12 and 13, adjust the pH of the reaction solution to 7.0 after the react...

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Abstract

The invention discloses a lignin-based anion-cation type high-molecular surface active agent and a preparation method thereof. The lignin-based anion-cation type high-molecular surface active agent comprises the following components in parts by weight: 100 parts of lignin sulfonate, 10-30 parts of epoxy chloropropane, 50-200 parts of polyethylene glycol, 1-3 parts of catalyst and 5-30 parts of quaternary-ammonium-salt type cationic surface active agent. The preparation method comprises the following steps: adopting the lignin sulfonate, the polyethylene glycol and the quaternary-ammonium-salt type cationic surface active agent as main materials, firstly synthesizing lignin sulfonate polyoxyethylene ether, and then compositing with the quaternary-ammonium-salt type cationic surface active agent to prepare the lignin-based anion-cation type high-molecular surface active agent. The novel lignin-based anion-cation type high-molecular surface active agent prepared by the invention has a controllable water draining skeleton and a polyoxyethylene-ether flexible hydrophilic side chain, has lower critical aggregation concentration and surface tension compared with the traditional lignin sulfonate, and can be applied in the industrial fields of pesticide dispersing agents and the like as a novel functional additive.

Description

technical field [0001] The invention relates to a polymer surfactant, in particular to a lignin-based anion-cation polymer surfactant and a preparation method thereof. Background technique [0002] Lignin is the second largest natural renewable resource in nature and an important resource for the future of mankind. The lignin used in industry is mainly from the by-product of paper industry, which is cheap and produced in large quantities. The paper industry is mainly based on chemical pulping, which is divided into two types: alkaline method and acid method. Lignosulfonate is a by-product of acid pulping with C 9 In addition to the hydrophobic skeleton, it also has strong hydrophilic groups such as sulfonate groups and weakly ionized groups such as carboxylic acid and phenolic hydroxyl groups. It has good water solubility and is a natural polymer anionic surfactant. It can be widely used in industrial fields, such as concrete water reducer, coal water slurry additive, oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/50B01F17/18C09K23/50C09K23/18
Inventor 邱学青周明松王文利杨东杰庞煜霞
Owner SOUTH CHINA UNIV OF TECH
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