An enzyme-catalysed bleaching treatment to meet dissolving pulp characteristics for cellulose derivatives applications

Quintana, Elisabet; Valls, Cristina; Vidal, Teresa; Roncero, M. Blanca

doi:10.1016/j.biortech.2013.08.104

Cited by 22 publications

(10 citation statements)

References 25 publications

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“…The textile industry not only provides one of the necessities of life, but it also plays a very important role through its contribution to industrial output and employment opportunity, which is particularly true in Asia. In recent years, the demand for regenerated cellulose, which is characterized as sustainable material that is compatibility with the environment, in addition to having unique favorable properties, has experienced rapid growth (Quintana et al 2013;Miao et al 2014;Tian et al 2014;Duan et al 2015;Chen et al 2015;Wang et al 2006Wang et al , 2015. The global production of textile fibers was predicted to increase from 72.5 million tons in 2010 to 133.5 million tons in 2030 (Haemmerle 2011).…”

Section: Introductionmentioning

confidence: 99%

Regenerated cellulose by the Lyocell process, a brief review of the process and properties

Zhang

Chen

Duan

et al. 2018

BioRes

123

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Lyocell fiber has emerged as an important class of regenerated cellulose that is produced based on the N-methyl morpholine-N-oxide (NMMO) dissolution method, and it has unique properties compared to viscose fiber. The NMMO technology provides a simple, resource-conserving, and environmentally friendly method for producing regenerated cellulose fiber. In this paper, the manufacturing process, environmental impact, and product quality of lyocell fiber are reviewed and compared with those of the conventional viscose fiber.

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Section: Introductionmentioning

confidence: 99%

Regenerated cellulose by the Lyocell process, a brief review of the process and properties

Zhang

Chen

Duan

et al. 2018

BioRes

123

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“…Biotechnology has been used for several applications in cellulose industry, such as biobleaching, biorefining, or even pulp quality upgrades Beltramino, 2016;Garcia-Ubasart, Torres, Vila, Pastor, & Vidal, 2013;Quintana, Valls, Vidal, & Blanca Roncero, 2013;Valls & Roncero, 2009). Generally, the use of enzymes as a green technology allows reducing the pollution generated by traditional chemical processes, providing a solution for an enormous social concern.…”

Section: Introductionmentioning

confidence: 99%

A novel enzymatic approach to nanocrystalline cellulose preparation

Beltramino

Roncero

Vidal

et al. 2018

Carbohydrate Polymers

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In this work, conditions for an enzymatic pretreatment prior to NCC isolation from cotton linter were assessed. Different cellulase doses and reaction times were studied within an experimental design and NCC were obtained. At optimal enzymatic conditions (20U, 2 h), a total yield greater than 80% was achieved and the necessary enzymatic treatment time was reduced 90%. Different intensities of enzymatic treatments led to proportional decreases in fiber length and viscosity and also were inversely proportional to the amount of released oligosaccharides. These differences within fibers lead to quantitative differences in NCC: increase in acid hydrolysis yield, reduction of NCC surface charge and crystallinity increase. Benefits produced by enzymatic treatments did not have influence over other NCC characteristics such as their sulfur content (≈1%), size (≈200 nm), zeta potential (≈-50 mV) or degree of polymerization (≈200). Evidence presented in this work would reduce the use of harsh sulfuric acid generating a cleaner stream of profitable oligosaccharides.

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“…Laccase in combination with a mediator (a laccase‐mediator system, LMS) for delignification and bleaching of chemical pulp has interested many researchers. [ 9,53–55 ]…”

Section: Enzymes Used For Biobleachingmentioning

confidence: 99%

Synergism of enzymes in chemical pulp bleaching from an industrial point of view: A critical review

Immerzeel

Fiskari

2022

Can J Chem Eng

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Enzymes are biological catalysts and are very specific, catalyzing either a single chemical reaction or a limited number of closely related reactions. For example, xylanases are enzymes that catalyze the cleavage of polymeric xylan and thereby break down this hemicellulose. The first xylanase enzyme preparations used in the bleaching process of chemical pulp also contained cellulase, which catalyzes the hydrolysis of cellulose. This obviously had an adverse effect on pulp yield and quality. Unfortunately, this setback gave enzyme-assisted pulp bleaching a negative reputation. At a later stage, enzyme producers managed to engineer enzyme production strains that generated cellulase-free xylanase preparations. However, due to the initial negative experiences with the earlier enzyme mixtures, only a limited number of companies in the pulp industry have seriously considered using these so-called second-generation enzymes in their bleach plants. It is apparent that these improved enzyme preparations would bring about significant benefits in terms of chemical cost savings and effluent quality. In addition to xylanaseaided bleaching, it is possible to improve the effectivity further by adding other enzymes, such as lipase and esterase, to create an enzyme cocktail. This may be particularly beneficial in the bleaching of hardwood pulp, such as white birch, which often encounters complex and troublesome problems with wood extractives. By adding different types of enzymes at more than one position in the fiberline, even further improvements are possible. The main objective of this review is to discuss the advantages of incorporating modern enzyme preparations in the bleaching of chemical pulp.

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An enzyme-catalysed bleaching treatment to meet dissolving pulp characteristics for cellulose derivatives applications

Cited by 22 publications

References 25 publications

Regenerated cellulose by the Lyocell process, a brief review of the process and properties

Regenerated cellulose by the Lyocell process, a brief review of the process and properties

A novel enzymatic approach to nanocrystalline cellulose preparation

Synergism of enzymes in chemical pulp bleaching from an industrial point of view: A critical review

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