Different Solvents for Organosolv Pulping

Rodríguez, Alejandro; Espinosa, Eduardo; Domínguez-Robles, Juan; Sánchez, Rafael; Bascón, Isabel; Rosal, Antonio

doi:10.5772/intechopen.79015

Cited by 28 publications

(19 citation statements)

References 101 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The working principle of the organosolv process is to use an aqueous organic solvent to extract lignin, where low molecular weight aliphatic alcohols are especially used for the extraction. Primary alcohols have shown more selective delignification than secondary and tertiary alcohols . The lower viscosity of organic solvents makes the solvent dispersion in the wood faster.…”

Section: Introductionmentioning

confidence: 99%

Toward a Consolidated Lignin Biorefinery: Preserving the Lignin Structure through Additive‐Free Protection Strategies

et al. 2020

View full text Add to dashboard Cite

As part of the continuing efforts in lignin‐first biorefinery concepts, this study concerns a consolidated green processing approach to obtain high yields of hemicelluloses and lignin with a close to native molecular structure, leaving a fiber fraction enriched in crystalline cellulose. This is done by subcritical water extraction of hemicelluloses followed by organosolv lignin extraction. This initial report focuses on a detailed characterization of the lignin component, with the aim of unravelling processing strategies for the preservation of the native linkages while still obtaining good yields and high purity. To this effect, a static cycle process is developed as a physical protection strategy for lignin, and advanced NMR analysis is applied to study structural changes in lignin. Chemical protection mechanisms in the cyclic method are also reported and contrasted with the mechanisms in a reference batch extraction process where the role of homolytic cleavage in subsequent repolymerization reactions is elucidated.

show abstract

Section: Introductionmentioning

confidence: 99%

Toward a Consolidated Lignin Biorefinery: Preserving the Lignin Structure through Additive‐Free Protection Strategies

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The ethanol organosolv pretreatment method is effective in the separation of cellulose from the lignin and hemicellulose. At the end of the process, the dissolved lignin together with other dissolved components is recovered by the distillation of the solvent [62].…”

Section: Organosolvmentioning

confidence: 99%

Agricultural Residues as an Alternative Source of Fibre for the Production of Paper in Kenya-A Review

Otieno

Okumu

Adalla

et al. 2021

AJOCS

View full text Add to dashboard Cite

The pulp and paper industry is primarily dependent on fibrous wood for pulp and paper production. However, this over-dependence on fibrous wood poses serious environmental challenges such as the diminishing of the fibrous wood stocks, deforestation, emission of greenhouse gases, and global warming. Therefore, to mitigate these environmental challenges associated with its utilization for paper and pulp production, other sustainable raw material sources can also be considered for the production of paper and pulp. There are enormous benefits associated with the utilization of non-wood fibres as an alternative and sustainable raw materials source for the production of paper and pulp. These benefits have in the recent past prompted millers in China, India, Brazil, and the USA to consider the utilization of non-wood fibres in paper and pulp production. In Kenya, the pulp and paper industry is very much dependent on fibrous wood for production and the industry is yet to fully embrace the utilization of nonwood fibres for paper and pulp production. Further, the dependence on fibrous wood has contributed significantly to the decline of paper pulp and paper production, deforestation, and rise in paper importations due to insufficient raw material supplies. The importation of paper and pulp products has further led to the collapse of the paper industry in Kenya. The sector stands a chance of revival and vibrancy through the utilization of the abundant agricultural residues and feedstocks lying in the agricultural fields across the country. Similar experiences elsewhere have proved that the abundance of agricultural waste can be utilized for the production of paper and pulp due to their excellent fibre content for specialty papers, and easy pulpability. The agricultural residues are therefore considered a quintessential alternative and sustainable source of raw materials for the pulp and paper industry. Moreover, their utilization will mitigate environmental impacts such as deforestation, climate change, and pollution .

show abstract

“…The manufacture of cellulosic pulp consists of the separation of cellulose fibers composed mainly of lignin using physical or chemical methods [1,2]. Classical pulping processes include soda, Kraft, sulfite, alcohol-based, and organic acid-based methods [1,3,4]. In particular, the sulfite process is a chemical pulping method of converting wood chips into paper pulp by cooking the lignocellulosic material with a solution of bisulfite and sulfur dioxide [1].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Co-Cultivation Process of Corynebacterium glutamicum Strains for the Fermentative Production of Riboflavin

et al. 2021

View full text Add to dashboard Cite

Residual streams from lignocellulosic processes contain sugar mixtures of glucose, xylose, and mannose. Here, the industrial workhorse Corynebacterium glutamicum was explored as a research platform for the rational utilization of a multiple sugar substrate. The endogenous manA gene was overexpressed to enhance mannose utilization. The overexpression of the xylA gene from Xanthomonas campestris in combination with the endogenous xylB gene enabled xylose consumption by C. glutamicum. Furthermore, riboflavin production was triggered by overexpressing the sigH gene from C. glutamicum. The resulting strains were studied during batch fermentations in flasks and 2 L lab-scale bioreactors separately using glucose, mannose, xylose, and a mixture of these three sugars as a carbon source. The production of riboflavin and consumption of sugars were improved during fed-batch fermentation thanks to a dynamic inoculation strategy of manA overexpressing strain and xylAB overexpressing strain. The final riboflavin titer, yield, and volumetric productivity from the sugar mixture were 27 mg L−1, 0.52 mg g−1, and 0.25 mg L−1 h−1, respectively. It reached a 56% higher volumetric productivity with 45% less by-product formation compared with an equivalent process inoculated with a single strain overexpressing the genes xylAB and manA combined. The results indicate the advantages of dynamic multi strains processes for the conversion of sugar mixtures.

show abstract

Different Solvents for Organosolv Pulping

Cited by 28 publications

References 101 publications

Toward a Consolidated Lignin Biorefinery: Preserving the Lignin Structure through Additive‐Free Protection Strategies

Toward a Consolidated Lignin Biorefinery: Preserving the Lignin Structure through Additive‐Free Protection Strategies

Agricultural Residues as an Alternative Source of Fibre for the Production of Paper in Kenya-A Review

Dynamic Co-Cultivation Process of Corynebacterium glutamicum Strains for the Fermentative Production of Riboflavin

Contact Info

Product

Resources

About