Surfactant properties of lignosulfonates

Trufanova, M. V.; Parfenova, L. N.; Yarygina, O. N.

doi:10.1134/s1070427210060352

Cited by 8 publications

(5 citation statements)

References 1 publication

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“…Wherein SDS addition led to formation of sulfur-sulfide pellets with size of 5-8 mm. In industrial conditions this can lead to emergency stop of autoclave [12].…”

Section: Resultsmentioning

confidence: 99%

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Sodium Lignosulfonate and Sodium Dodecyl-Sulfate Mixtures Influence on Zinc Concentrate Pressure Leaching and Zinc Electro-Winning

Kolmachikhina

Рыжкова

Dmitrieva

2020

SSP

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This paper is describing an investigation of sodium lingo-sulfonate and sodium dodecyl-sulfate mixtures influence on zinc concentrates high temperature oxidative pressure leaching and zinc electro-winning. For this purpose, surfactants concentration at leaching tests was varied from 200 to 800 mg∙l-1. It was established that the maximum zinc extraction (99 %) at leaching was achieved in the presence of mixture containing 800 mg∙l-1 lignosulfonate and 200 mg∙l-1 sodium dodecyl-sulfate. Therefore, this mixture can be recommended for high temperature oxidative pressure leaching of zinc concentrates. Sulfur-sulfide pellets formation also was observed at a low lingo-sulfonate concentration (200 mg∙l-1) in a mixture with sodium dodecyl-sulfate. This phenomenon can lead to emergency shut down of autoclave. It was observed that the mixture usage of 800 mg∙l-1 lignosulfonate and 200 mg∙l-1 sodium dodecyl-sulfate had no significant impact on zinc current efficiency, it was in the rage of 92-93 %. The mixture usage of 200 mg∙l-1 lignosulfonate and 600 mg∙l-1 sodium dodecyl-sulfate allowed to increase current efficiency up to 95 %. Increasing sodium dodecyl-sulfate concentration in mixtures with lignosulfonates leads to decrease of current efficiency, to formation of deep pores and defects on cathode zinc surface.

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“…Wherein SDS addition led to formation of sulfur-sulfide pellets with size of 5-8 mm. In industrial conditions this can lead to emergency stop of autoclave [12].…”

Section: Resultsmentioning

confidence: 99%

“…One of the most effective surfactants for zinc sulfide leaching is lignosulfonate due to its availability, nontoxic and low price [12]. In number of works [13][14][15] formation of sulfur-sulfide and sulfur phases investigation was carried out.…”

Section: Introductionmentioning

confidence: 99%

Sodium Lignosulfonate and Sodium Dodecyl-Sulfate Mixtures Influence on Zinc Concentrate Pressure Leaching and Zinc Electro-Winning

Kolmachikhina

Рыжкова

Dmitrieva

2020

SSP

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“…Lignosulfonates are thought to stabilise the soil by coating together its particles [30,33]. However, lignosulfonates also have surfactant [31] and dispersive properties [14,25]. Thus, the stabilisation mechanism of lignosulfonates is not yet well understood.…”

Section: B Lignosulfonatesmentioning

confidence: 99%

“…Some authors, for example, Velasquez et al [32] demonstrated that enzymatic solutions could have surfactant properties. As enzymatic solutions, lignosulfonates also have surfactant properties, which could alter the mechanical behaviour of soils [10,31]. To determine if the tested non-traditional additives have surfactant properties, the surface tension was measured using the Du Noüy ring method [9].…”

Section: B Comparison Of the Treatment Additives With A Common Surfmentioning

confidence: 99%

Soil treatment with organic non-traditional additives for the improvement of earthworks

2013

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The aim of this study was to characterise the technical and environmental implications of non-traditional treatments of a low-plasticity compacted silt (PI = 14) and to investigate their actions both at the micro-and macro-structural scales. Three non-traditional additives derived from industrial vegetal by-products were studied. These additives are classified as an acid solution (AS), an enzymatic solution (ES) and calcium lignosulfonate (LS). The first step was to characterise the effects of these treatments on Proctor compaction, bearing capacity, unconfined compressive strength and stiffness. The index properties of the treated samples were also measured to assess changes in the interaction between soil minerals and the additives. These experimental results showed that the 0.002% ES and 2.0% LS treatments were the most effective at improving the soil dry density and allowing the soil to reach optimum density using 3% less water or 25% less compaction energy. In a second step the mechanisms involved by the treatment were investigated. A microscopic study was conducted including scanning electronic microscopy (SEM) and mercury injection porosity (MIP) tests, measurements of the surface tension of non-traditional additives mixed with water completed the study and demonstrated that the ES treatment has the same surfactant properties as sodium dodecyl sulfate, a common surfactant. Compaction tests confirmed that the behaviours of the soil after ES and sodium dodecyl sulfate treatments were similar.

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“…Because the emulsion system is able to provide a much larger interface for reactions involving in problem related with the incompatibility of reactants. 13 As described above, lignin can be employed as a surfactant, 4,14,15 or as a precursor for the production of functional surfactants due to the numerous hydrophilic and hydrophobic groups it contains. 16 Hence, developing an emulsion system utilizing lignin as the surfactant has obvious advantages, and several new emulsion systems for lignin depolymerization have been demonstrated on the basis of its self-surfactivity.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Organosolv Lignin in a Novel Surfactant-free Microemulsion Reactor

Kong¹,

Li²,

Luo³

et al. 2020

Preprint

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Lignin is considered as a promising substitute for fossil resources, but the efficient conversion of the lignin remains a huge challenge due to its structural complexity and immiscibility with typical solvents. Herein, a series of surfactant-free microemulsion reactors comprised of octane, water and n-propanol were designed and their corresponding phase behaviors alongside their ability to intensify oxidative depolymerization of lignin was explored. Experimental results show that the phenolic monomer yield improves substantially (40-500 wt.%) when the novel microemulsion systems are employed by comparison with processes performed in a single solvent. Detailed characterizations also suggest that the above intensification is rationalized by the solubilization effect of the microemulsion system, which arise as a consequence of directional aggregation of lignin at the microemulsion interface.

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Surfactant properties of lignosulfonates

Cited by 8 publications

References 1 publication

Sodium Lignosulfonate and Sodium Dodecyl-Sulfate Mixtures Influence on Zinc Concentrate Pressure Leaching and Zinc Electro-Winning

Sodium Lignosulfonate and Sodium Dodecyl-Sulfate Mixtures Influence on Zinc Concentrate Pressure Leaching and Zinc Electro-Winning

Soil treatment with organic non-traditional additives for the improvement of earthworks

Oxidation of Organosolv Lignin in a Novel Surfactant-free Microemulsion Reactor

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