Sulfobutylated Lignosulfonate with Ultrahigh Sulfonation Degree and Its Dispersion Property in Low-Rank Coal-Water Slurry

Qiu, Xueqing; Zeng, Weimei; Liang, Wanshan; Xue, Yuyuan; Hong, Nanlong; Li, Yuan

doi:10.1080/01932691.2015.1022658

Cited by 18 publications

(7 citation statements)

References 21 publications

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“…An example would be the oxypropylation of sodium lignosulfonate, as it has been conducted to increase reactivity with methane diisocyanate for lignin-polyurethane synthesis [154]. When considering the dispersant application of lignosulfonates, sulfobutylation (alkyl sulfonic acid grafting) has been conducted [155]. The lignosulfonates accordingly showed a high degree of sulfonation with 3.86 mmol/g and improved viscosity reduction of low-rank coal-water slurries.…”

Section: Relationship Between the Chemical Make-up And The Physicochemical Behaviormentioning

confidence: 99%

“…The lignosulfonates accordingly showed a high degree of sulfonation with 3.86 mmol/g and improved viscosity reduction of low-rank coal-water slurries. The underlying implication is that by placing the sulfonate groups on alkyl chains, these would not only be more accessible, but also possessed a higher degree of freedom, which could play out as a more effective anchoring effect and hence improve dispersion ability [155].…”

Section: Relationship Between the Chemical Make-up And The Physicochemical Behaviormentioning

confidence: 99%

“…As discussed previously, the degree of sulfonation may be regulated by controlling the conditions during sulfite pulping of wood. In addition, post-pulping treatments that increase the amount of sulfonate groups have been proposed, such as additional sulfonation with sodium sulfite [159], sulfomethylation [130], and sulfobutylation [155]. Carboxylation can be the result of lignosulfonate oxidation [160], but grafting strategies have also been proposed such as esterification with maleic anhydride [161].…”

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A Critical Review of the Physicochemical Properties of Lignosulfonates: Chemical Structure and Behavior in Aqueous Solution, at Surfaces and Interfaces

Ruwoldt¹

2020

Surfaces

100

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Lignosulfonates are bio-based surfactants and specialty chemicals, which are generated by breaking the near-infinite lignin network during sulfite pulping of wood. Due to their amphiphilic nature, lignosulfonates are used in manifold applications such as plasticizer, dispersant, and stabilizer formulations. Function and performance are determined by their behavior in aqueous solution and at surfaces and interfaces, which is in turn imposed by the chemical make-up. This review hence summarizes the efforts made into delineating the physicochemical properties of lignosulfonates, while also relating to their composition and structure. Lignosulfonates are randomly branched polyelectrolytes with abundant sulfonate and carboxylic acid groups to ensure water-solubility. In aqueous solution, their conformation, colloidal state, and adsorption at surfaces or interfaces can be affected by a range of parameters, such as pH, concentration of other electrolytes, temperature, and the presence of organic solvents. These parameters may also affect the adsorption behavior, which reportedly follows Langmuir isotherm and pseudo second-order kinetics. The relative hydrophobicity, as determined by hydrophobic interaction chromatography, is an indicator that can help to relate composition and behavior of lignosulfonates. More hydrophobic materials have been found to exhibit a lower charge density. This may improve dispersion stabilization, but it can also be disadvantageous if an electrokinetic charge needs to be introduced at solid surfaces or if precipitation due to salting out is an issue. In addition, the monolignol composition, molecular weight distribution, and chemical modification may affect the physicochemical behavior of lignosulfonates. In conclusion, the properties of lignosulfonates can be tailored by controlling aspects such as the production parameters, fractionation, and by subsequent modification. Recent developments have spawned a magnitude of products and technologies, which is also reflected in the wide variety of possible application areas.

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Section: Relationship Between the Chemical Make-up And The Physicochemical Behaviormentioning

confidence: 99%

Section: Relationship Between the Chemical Make-up And The Physicochemical Behaviormentioning

confidence: 99%

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confidence: 99%

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A Critical Review of the Physicochemical Properties of Lignosulfonates: Chemical Structure and Behavior in Aqueous Solution, at Surfaces and Interfaces

Ruwoldt¹

2020

Surfaces

100

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“…Specific experimental steps are as follows: 10 g of TA was dissolved in a 250 mL three-necked flask equipped with 100 mL of water, adjusted to pH 12 with aqueous sodium hydroxide solution, and heated to 80 °C to fully dissolve, and then to a three-necked flask was added dropwise 1,6-dibromohexane for a 1 h drop finish at 80 °C reaction for 5 h. Then, hydrochloric acid was used to adjust the pH to 3–4, and 1.2 mL of hydrogen peroxide was added at 80 °C for 0.5 h. Next, different proportions of IA and AMPS aqueous solution and initiator were added to the three-necked flask. After 3 h of reaction, the mixture was cooled to room temperature , and excess 1,6-dibromohexane , was removed using hexane. ,− Finally, the filtrate was dialyzed in 3500 dialysis bags for 3 days and then oven-dried to obtain TIA-1. Adding 15 and 20 g of TA in the same way can give TIA-2 and TIA-3, respectively.…”

Section: Experimental Sectionmentioning

confidence: 99%

Novel Dispersant with a Three-Dimensional Reticulated Structure for a Coal–Water Slurry

Zhao

Wang

et al. 2018

Energy Fuels

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A novel type of large reticulation, three-dimensional structure of a coal–water slurry dispersant was designed and synthesized, which was mainly used to test the Xinjiang Zhundong coal with abundant reserves and poor slurrying performance. The same types of three dispersants (TIA-1, TIA-2, and TIA-3) were made by adjusting the amount of tannic acid (TA). Commercial NDF dispersant is used for comparison. TA molecules were linked into reticulation by a linker (1,6-dibromohexane) and then modified with 2-acrylanmido-2-methylpropanesulfonic acid and itaconic acid on this reticulated structure. The structure of TIA was confirmed by Fourier transform infrared spectroscopy and 1H nuclear magnetic resonance. The rheology and stability indicated that the optimal amount of this dispersant was 0.1 wt %, and its pulping concentration was increased to 59 wt %. The dispersants of TIA-1, TIA-2, and TIA-3 comparative tests demonstrated that TIA-1 exhibited excellent stability and rheology, reducing the dosage of the dispersant. The experiment showed that the concentration of slurry could reach 59% with the dosage of 0.1%. This is mainly attributed to the excellent large reticulation, three-dimensional structure of TIA-1. This special structure has polar and nonpolar sites that can efficiently coat coal particles and change the interfacial tension effectively between coal and water.

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“…However, in water, lignosulfonates are dissolved as an aggregate of curled‐up molecules, resulting in low reactivity. To expand the application field of lignosulfonates, their reactivity can be improved by chemical modification in green solvents for different application fields [24] . Moreover, the free phenolic hydroxyl group is easily ionized, so that the para and ortho positions of the phenolic hydroxyl group are activated, and then it can be oxidized, degraded, or dealkylated with nucleophiles such as formaldehyde.…”

Section: Introductionmentioning

confidence: 99%

Water‐soluble Lignosulfonates: Structure, Preparation, and Application

et al. 2023

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As one of the key raw materials that replace petroleum materials in today‘s world, biomass resources could be regarded as a promising resource. Currently, lignin and its derivatives are the only lignocellulosic biomass found to possess aromatic rings. Extending the application area of lignin requires overcoming the limitations of its low hydrophilicity. Sulfonation process becomes the most effective method for preparing lignosulfonates. An analysis of the mechanisms by which different lignosulfonates are prepared. It compared the effects of various modification methods on charge density and sulfonate group content in lignosulfonates. It also examined how different separation techniques affect the properties of lignosulfonates. As a result of being more water‐soluble, there is also a review of cutting‐edge research in the fields of energy, medicine, and agriculture. Also, the possible uses of lignosulfonate are talked about, and ideas are given for how this compound could be improved in the future.

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Sulfobutylated Lignosulfonate with Ultrahigh Sulfonation Degree and Its Dispersion Property in Low-Rank Coal-Water Slurry

Cited by 18 publications

References 21 publications

A Critical Review of the Physicochemical Properties of Lignosulfonates: Chemical Structure and Behavior in Aqueous Solution, at Surfaces and Interfaces

A Critical Review of the Physicochemical Properties of Lignosulfonates: Chemical Structure and Behavior in Aqueous Solution, at Surfaces and Interfaces

Novel Dispersant with a Three-Dimensional Reticulated Structure for a Coal–Water Slurry

Water‐soluble Lignosulfonates: Structure, Preparation, and Application

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