Dissolving pulp industry : market trends

Durbak, Irene

doi:10.2737/fpl-gtr-77

Cited by 6 publications

(5 citation statements)

References 0 publications

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“…It is interesting to note that these results are similar or even superior to the previously reported values. For example, Roman and Winter (2004) have reported an α-cellulose content varying between 90 to 92% in sulphite pulps, which could be used depending on the application; Klemm et al (2005) and Durbak (1993) worked with A. farnesiana and obtained the amount of bleached pulp that exceeded the minimum value obtained in the sulphite treatment of the raw material. For the values of α-cellulose, it has been reported that high values of this constituent indicate a lower degradation of the polymer chain, which in turn is reflected in several of its properties such as the crystallinity index or viscosity (Macdonald 2011; It should be noted that the DP can vary depending on the species selected for the study or the method used to isolate it.…”

Section: Chemical Analysis Of Bleached Pulpmentioning

confidence: 99%

“…In response, many paper mills have modified their pulp manufacturing processes to produce dissolving grade pulps from a wide variety of woody raw materials. Dissolving grade pulps are chemically refined pulp products that have high levels of whiteness and α-cellulose contents (> 90%); they can be used for the production of different end products (Durbak 1993;Woodings 2001).…”

Section: Introductionmentioning

confidence: 99%

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Obtaining dissolving grade cellulose from the huizache (Acacia farnesiana L. Willd.) plant

Ramírez-Casillas

López-López

Becerra-Aguilar

et al. 2019

BioRes

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Considering that many paper mills have modified their pulp manufacturing processes to produce dissolving grade pulps from a wide variety of woods, which can be used for the production of different end products, attempts have also been made to obtain highly purified pulps using several woods and non-timber as raw materials using chemical routes. This paper is an attempt to overcome the problem of the shortage of commercial timber for pulping purposes wherein non-commercial, widely distributed huizache, a woody plant, was evaluated as a raw material for the production of dissolving grade cellulose using an alkaline sulfur anthraquinone-methanol process with a pre-hydrolysis step and optimized conditions of the process. The pulp obtained from the cooking process was subjected to a sequence of elemental chlorine free bleaching. The pulp was analyzed for its performance during the pulping process, Kappa number, ISO brightness, contents of α, β, and γ cellulose, crystallinity index, degree of polymerization, and viscosity. The obtained results revealed high levels of all these parameters for the pulp produced from Acacia farnesiana, suggesting this plant could be considered as a raw material alternative for the production of dissolving grade cellulose, which in turn can be used to produce nanocellulose crystals.

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Section: Chemical Analysis Of Bleached Pulpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Obtaining dissolving grade cellulose from the huizache (Acacia farnesiana L. Willd.) plant

Ramírez-Casillas

López-López

Becerra-Aguilar

et al. 2019

BioRes

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“…The mill produced an alpha pulp that was sold as market pulp to paper-processing firms or dissolving pulp to the textile and cellophane industries (Brooks and Haynes 1990). By 1988, the two pulp mills in Alaska had a combined annual production of 391,000 tons of pulp, used an estimated 70 million cubic feet of wood, and were employing 880 workers (Durbak 1993). Brooks and Haynes (1990)…”

Section: Historical Overviewmentioning

confidence: 99%

Alaska’s timber harvest and forest products industry, 2011

Berg¹,

Gale²,

Morgan³

et al. 2014

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is dedicated to the principle of multiple use management of the Nation's forest resources for sustained yields of wood, water, forage, wildlife, and recreation. Through forestry research, cooperation with the States and private forest owners, and management of the National Forests and National Grasslands, it strives-as directed by Congress-to provide increasingly greater service to a growing Nation. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.

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“…The mill produced an alpha pulp that was sold as market pulp to paper-processing firms or dissolving pulp to the textile and cellophane industries . By 1988, the two pulp mills in Alaska had a combined annual production of 391,000 tons of pulp, used an estimated 70 million cubic feet of wood, and were employing 880 workers (Durbak 1993). Brooks and Haynes (1990) Sitka mill in September of 1993, citing "…adverse world market pulp conditions, increasing production costs, and a shortfall in the amount of timber available at an affordable price…" (Morse 1998).…”

Section: Historical Overviewmentioning

confidence: 99%