Production of Flocculants, Adsorbents, and Dispersants from Lignin

Chen, Jiachuan; Kazzaz, Armin Eraghi; Alipoormazandarani, Niloofar; Feizi, Zahra Hosseinpour; Fatehi, Pedram

doi:10.3390/molecules23040868

Cited by 80 publications

(57 citation statements)

References 147 publications

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“…There had been recent interest in modifying biomaterials such as starch, chitosan, and cellulose to develop environmentally friendly flocculants and dispersants, and few studies have focused on clay mineral suspensions or mineral unit operations such as flotation, as was discussed earlier . Hasan and Fatehi assessed two kraft lignin‐acrylamides with different molecular weights and observed that more quantities of polymer were adsorbed on kaolinite than on bentonite surfaces.…”

Section: Future Developmentsmentioning

confidence: 99%

Slurry rheology in mineral processing unit operations: A critical review

2019

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Knowledge of slurry rheology in mineral processing is essential for the optimization of wet-grinding, dewatering, transport, and tailings management and it is becoming important in flotation due to the increasing need to process complex ores with a high clay mineral content. Slurries of these ores often display complex rheological behaviour even at low solids concentration, and traditional rheology measurements in mineral processing, such as yield stress and apparent viscosities, may not provide the critical information needed for process optimization. The objective of this paper is to provide a comprehensive review of some of the previous rheology studies performed at the bench, pilot plant, and industrial scale for different unit operations and to discuss the potential for alternative rheology measurements to provide a better insight into colloidal particle interactions in slurries with clay minerals. Firstly, the fundamentals of slurry rheology and the influence of colloidal particles are presented. Secondly, rheology measurements for suspensions are described briefly. Thirdly, a review of rheology studies in grinding, classification, flotation, dewatering, and tailings management is done, outlining possible ways of determining types of particle associations in slurries. Finally, recommendations for future research directions are provided.

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Section: Future Developmentsmentioning

confidence: 99%

Slurry rheology in mineral processing unit operations: A critical review

2019

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“…This effect could possibly be caused by lignosulfonates acting as dispersant of the plant fibers and debris present in the crude juice. Lignosulfonates are in some applications used as dispersant of particles (Chen et al, 2018). The problem was solved by a mild centrifugation (called a clearing) of the juice prior to the precipitation.…”

Section: Initial Experimentsmentioning

confidence: 99%

Enhancing Protein Recovery in Green Biorefineries by Lignosulfonate-Assisted Precipitation

Cour

Schjøerring

Jørgensen

2019

Front. Sustain. Food Syst.

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Biorefining of green biomass to produce proteins for feed and food provides an important challenge in relation to development of a future sustainable and climateneutral agriculture. In order to make it a viable value chain, all parts of the process need to be optimized. This includes careful selection of the source of biomass, the procedure used for protein extraction as well as the separation and recovery of proteins from the press juice. We here focus on recovery of proteins from juice made from screw press fractionation of four green biomasses, viz. ryegrass, red clover, ryegrasswhite clover mixture and spinach. Separating out protein from the juice is a key step and several different methods have routinely been applied. We demonstrate that lignosulfonates aid in the precipitation of proteins in the juice. The optimal loading of lignosulfonate was 0.6-0.7 g per g crude protein in the juice. For ryegrass and red clover juice, this loading resulted in 10-25% increase in precipitated protein compared to the classical precipitation by heat treatment or acidification. For spinach, up to 60% increase in protein recovery was obtained by lignosulfonate addition. We conclude that lignosulfonate-assisted precipitation holds potential for improving the protein yield in biorefining of green biomass.

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“…[2][3][4] Lignin, an amorphous heteropolymer, is insoluble in water and has a limited reactivity. 5,6 It mainly comprises methoxylated phenylpropanoid (guaiacyl and syringyl) subunits that provide lignin with an energy density of 30% higher than that of polysaccharide polymers. 1,7 Lignin can be an alternative product to petroleum feedstocks for producing different chemicals.…”

Section: Introductionmentioning

confidence: 99%

Grafting strategies for hydroxy groups of lignin for producing materials

2019

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Lignin is one of the most abundant biopolymers on Earth and is considered as the primary resource of aromatic compounds. Recently, lignin has attracted attention from scientists and industrialists due to its inherent potential arising from its unique structure, which leads to its possible use in many applications.Many efforts have been made to ameliorate the reactivity and compatibility of lignin in different areas. Although methods have been proposed for endowing lignin with different properties, there continues to be a considerable demand for discovering new and effective ways of unraveling the beneficial uses of this aromatic polymer. Considering the structure of lignin, different grafting modifications can occur on the aliphatic and/or aromatic groups of lignin. To date, there has been a lack of fundamental understanding of the modification pathways of lignin for generating lignin-based products. In this review paper, we discuss comprehensively the chemical reactions that were introduced in the literature for preparing lignin with different features via modifying its phenolic and aliphatic hydroxy groups for altered uses. This review paper critically and comprehensively elaborates on the recent progress in lignin reactions as well as the challenges, advantages and disadvantages associated with the reaction procedures and the product development processes. Furthermore, the research gap in reaction strategies and product development are described throughout this study.

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Production of Flocculants, Adsorbents, and Dispersants from Lignin

Cited by 80 publications

References 147 publications

Slurry rheology in mineral processing unit operations: A critical review

Slurry rheology in mineral processing unit operations: A critical review

Enhancing Protein Recovery in Green Biorefineries by Lignosulfonate-Assisted Precipitation

Grafting strategies for hydroxy groups of lignin for producing materials

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