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This acquisition will provide Sappi with both cost reductions and decreased volatility at a very competitive price per ton of pulp. A global leader in paper, paper pulp and dissolving wood pulp solutions, Sappi Limited listed on the JSE - SAPis headquartered in Johannesburg, South Africa; has over 12, employees; manufacturing operations on three continents, in seven countries nine mills in Europe, three mills in America and four mills in South Africa and customers in over countries worldwide.

Sappi works closely with customers to provide relevant and sustainable paper, paper pulp, dissolving wood pulp and biomaterial products and related services and innovations. Our market-leading range of paper products includes: coated fine papers used by printers, publishers and corporate end-users; casting release papers used by suppliers to the fashion, textiles, automobile and household industries; and in our Southern African region newsprint, uncoated graphic and business papers, premium quality packaging papers and paper grade pulp.

Our dissolving wood pulp products are used worldwide by converters to produce viscose fibre, pharmaceutical products as well as a wide range of household and consumer products. In FY we produced approximately: 5. We are investing in developing our biomaterials nanocellulose, fibre composites and lignosulphonate and biorefinery second generation sugars and bio-energy businesses.

We continue to grow into a profitable and cash-generative diversified business with an exciting future in woodfibre, a renewable resource. Lawrence River at the mouth of the Matane River. The mill has a capacity ofmt per annum of high yield hardwood pulp. It has employees. Subscribe to our FREE newsletter. Fastmarkets RISI is the best positioned and most authoritative global source of forest products information and data. We have a comprehensive digital offering which helps provide understanding and insight for our expanding customer base in this growing market.

Skip to main content. Sappi concludes its acquisition of Matane high yield hardwood pulp mill from Rayonier Advanced Materials. Read so far. Rayonier Advanced Materials. North America. About Fastmarkets RISI is the best positioned and most authoritative global source of forest products information and data. All rights reserved.These metrics are regularly updated to reflect usage leading up to the last few days.

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EP3093389A1 - Dissolving pulp - Google Patents

A high accessibility is an essential prerequisite for a homogeneous substitution of cellulose material. In this study, chemical and enzymatic pretreatments to increase the accessibility of cellulose materials have been investigated. Dissolving pulp has been treated with a monocomponent endoglucanase. Fock's method, a microscale process similar to the viscose process, showed an increase in cellulose yield.

Simultaneously, the viscosity decreased. To clarify whether the increase in reactivity was due solely to the decrease in the degree of polymerization, the dissolving pulp was also subjected to acid hydrolysis. At a given viscosity level, the enzymatic pretreated pulp had a higher reactivity than the pulp subjected to acid hydrolysis. A monocomponent endoglucanase can thus be used to increase the reactivity and accessibility of dissolving pulp in the viscose process.

View Author Information. Cite this: Biomacromolecules76 Article Views Altmetric. Citations Cited By. This article is cited by 86 publications. Hodge, Eric L. DOI: Biomacromolecules20 3 Mello, Marcelo M. Oliveira, Marcos S.

Buckeridge, Fabio M. Squina, and Carlos Driemeier. The Journal of Physical Chemistry B21 Verena Gehmayr and Herbert Sixta. Biomacromolecules13 3 Miro Suchy, Markus B. Linder, Tekla Tammelin, J. Campbell, Tapani Vuorinen, and Eero Kontturi. Langmuir27 14 Dissolution Behavior of Different Celluloses. Biomacromolecules12 4 Ilari Filpponen and Dimitris S. Ankerfors, H.The need for long fiber dissolving pulp in Indonesia can only be met from imports.

Bamboo is a nonwood plant and known as source of long fiber. This research aims to study the potential of spiny bamboo to be used as raw material for producing long fiber dissolving pulp.

This research was conducted using two different types of raw materials preparation to produce bamboo chip and decorticated bamboo. The pulping process is carried out by pre-hydrolysis kraft and bleaching performed with two different bleaching sequences, i.

Based on the experimental results, spiny bamboo has good potential to be used as raw material for dissolving pulp. Spiny bamboo belongs to long fibers with an average fiber length of 2. The dissolving quality depends on the preparation of the raw material and the bleaching sequence. The yield of spiny bamboo dissolving pulp ranged from Decorticated bamboo with bleaching sequence of Do EpD1 D2 produced the highest quality of dissolving pulp with the highest brightness and alpha cellulose were Kebutuhan dissolving pulp serat panjang di Indonesia hanya dapat dipenuhi melalui impor.

Bambu adalah tanaman nonkayu dan dikenal sebagai sumber serat panjang. Penelitian ini bertujuan untuk mempelajari potensi bambu duri untuk dijadikan bahan baku pembuatan dissolving pulp serat panjang. Penelitian ini dilakukan dengan dua jenis persiapan bahan baku yang berbeda untuk menghasilkan serpih bambu dan bambu dekortikasi.

Berdasarkan hasil penelitian, bambu duri memiliki potensi yang baik untuk digunakan sebagai bahan baku pembuatan dissolving pulp.

Bambu duri tergolong serat panjang dengan panjang serat rata-rata 2,46 mm. Kualitas dissolving pup yang dihasilkan tergantung dari persiapan bahan baku dan urutan pemutihan.

Kata kunci: dissolving pulpbambu duri Bambusa blumeanaserpih bambu, bambu dekortikasi, prahidrolisis kraft. Antes, R. Ariyanti, R. Batalha, L.

dissolving pulp yield

Biermann, C. California: Elsevier Inc. Cao, S. Carrillo, I.Demands for environmentally friendly fiber sources have dramatically increased the interest in utilizing dissolving pulp, particularly in textile processes. ANDRITZ has a cost-effective approach to dissolving pulp production that includes a new continuous auto-hydrolysis cooking process coupled with efficient washers and other proven downstream pulp processing equipment.

World demand for dissolving pulp began trending steeply upwards in the early years of the current decade and has continued to grow above the rate of GDP. A lot of the increase in demand is due to substitution for cotton. The current estimate is that dissolving pulp demand will hit 7.

The key challenges are maintaining high yield and productivity while ensuring consistent pulp quality. Our experience with biofuels has further led us to design the system with special features considering the optimal methods for by-product recovery and reutilization. ANDRITZ has experience integrating all of the existing process areas with this new technology specifically for dissolving pulp production. Experienced ANDRITZ project teams give you support during engineering, planning, erection, and start-up of your dissolving pulp production line.

Global and local technical and service support is at-the-ready throughout the life of the equipment. The most advanced way to produce dissolving pulps. The key to successful dissolving pulp production is efficient removal of the hemicelluloses in the fiber source without damaging the actual cellulose.

dissolving pulp yield

Comprehensive service to support customer processes: from replacement parts to complete mill maintenance ANDRITZ technologies for dissolving pulp production Demands for environmentally friendly fiber sources have dramatically increased the interest in utilizing dissolving pulp, particularly in textile processes. Dissolving pulp production processes and technologies Pre-hydrolysis continuous cooking Pulp sheet drying, dissolving pulps Evaporation Other processes and technologies in common with kraft pulp production.

Evaporation plants Technologies and services for highly challenging pulp mill evaporation needs. Fiberline technology Maintaining the lead through technology. Find out more Automation for the pulp and paper industry Optimization, data analysis, augmented reality. Our service Comprehensive service to support customer processes: from replacement parts to complete mill maintenance Contact us. Success stories. Related links.The main difference between the qualities of kraft pulp and dissolving pulp is in the content of alpha-cellulose, ash content, DCM-extractives, and the density of the pulp sheet.

Perfect sheet formation and the highest wet sheet tensile strength are important factors in the availability and successful operation of a large single pulp drying line.

Pulp baling lines include reliable high-speed cutting, bale handling, and wrapping of dried market dissolving pulp:. ANDRITZ has successfully further developed state-of-the-art pulp baling technologies by revising the design and technical features to provide customers with sophisticated and reliable systems. For specific market dissolving pulp grades, a roll finishing system may be used in addition to or instead of a pulp bale finishing system.

ANDRITZ has its own automation department supplying the systems for monitoring and controlling a complete drying line. We assist in the early stages of a project by performing plant surveys, upgrade studies, and pilot plant trials. Integrating all existing process areas with technology specifically for dissolving pulp production. The most advanced way to produce dissolving pulps.

dissolving pulp yield

The key to successful dissolving pulp production is efficient removal of the hemicelluloses in the fiber source without damaging the actual cellulose. Comprehensive service to support customer processes: from replacement parts to complete mill maintenance Pulp dewatering Perfect sheet formation and the highest wet sheet tensile strength are important factors in the availability and successful operation of a large single pulp drying line.

Pulp drying line for dissolving pulp. Pulp roll finishing For specific market dissolving pulp grades, a roll finishing system may be used in addition to or instead of a pulp bale finishing system.

Dissolving pulp Integrating all existing process areas with technology specifically for dissolving pulp production.

BioResources

Evaporation plants Technologies and services for highly challenging pulp mill evaporation needs. Find out more Automation for the pulp and paper industry Optimization, data analysis, augmented reality. Our service Comprehensive service to support customer processes: from replacement parts to complete mill maintenance Pulp drying and finishing. High-capacity pulp dewatering.Extension state : BA ME.

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dissolving pulp yield

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Kraft process

Ref country code : NL. Ref legal event code : MP. Ref country code : LT. Ref legal event code : MG4D. There is provided a dissolving pulp, a cellulosic composition, a composition, regenerated cellulose fibre and a textile comprising Acacia crassicarpa. There is provided the use of the compositions for preparing a dissolving pulp.

There is provided a method of preparing dissolving pulp, comprising: a hydrolysing a composition comprising cellulosic or a lignocellulosic material of Acacia crassicarpa to thereby form a treated cellulosic or lignocellulosic composition; b heating the treated composition under conditions to produce said dissolving pulp; and a method of producing regenerated cellulose fibres, comprising: a base treatment of a dissolving pulp of Acacia crassicarpa to produce cellulose xanthate; b neutralizing said cellulose xanthate to produce said regenerated cellulose fibres.

Technical Field The present invention generally relates to pulp processing and more specifically to an alternative pulp and methods of producing the same. Dissolving pulp is a bleached wood pulp that has a high cellulose content, e. It is typically bleached to a high level of brightness and has specific properties, such as a uniform molecular weight distribution.

It is called dissolving pulp because it is not made into paper but dissolved into a solvent or otherwise made into a homogeneous solution which can then be spun to produce textile fibres or further chemically reacted to produce a wide range of cellulose derivatives. Many wood species can be used to produce dissolving pulp, however pine and eucalypt species are predominantly used today. The majority of dissolving pulp is produced from hardwood species primarily due to availability, density, cost and relative ease of delignification.Thank you for visiting nature.

You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. A Nature Research Journal. Xylanase is commonly applied in pulp and paper industries to ease cost-related and environmental pressures.

The effect of xylanase treatment on pulp bleaching is well-established, however, few studies were conducted on the effects of xylanase treatment in pulp yellowing, especially the mechanism of pulp yellowing inhibition by xylanase treatment.

In this study, pure xylanase EC 3. The xylanase treatment decreased the post-color number of the pulps during light- and heat-induced yellowing. The changes in chemical components of pulps after the xylanase treatment, for example, lignin, hemicellulose, and HexA contents, and analysis of UV—vis absorption spectra and Fourier transform infrared-attenuated total reflectance spectrum were used to explore the pulp yellowing inhibition causes by the xylanase treatment.

As a high-level consumer of lignocellulosic resources, the papermaking industry should urgently expand its sources of raw material and improve its practical utilization of raw materials, especially in countries characterized by wood shortage, such as China 2. Abundant non-wood materials with high annual yields per hectare and low cost of wheat straw and reed, for example, are raw materials well-suited to the pulp industry 2345.

Straw is the most commonly utilized non-wood material in the pulp and papermaking industry. High-yield pulps HYPssuch as chemi-thermo-mechanical pulp CTMPhave been rapidly developed because of low cost and improved wood utilization 7.

Compared with chemical pulps, HYP fibers offer distinct papermaking advantages including bulk, opacity, stiffness, and printability 89 In addition, HYP fibers can fully replace chemical pulps in certain high-value products. In general, pulp yellowing includes both light- and heat-induced yellowing.

Pulps easily become yellow when exposed to daylight, indoor illumination, or high temperatures. For chemical pulps, heat-induced yellowing is the main form of brightness reversion. Lignin residues, carbonyl groups, xylan, hexenuronic acid HexA groups, and transition metal ions are involved in the yellowing reactions 13 Residual lignin, the products of polysaccharide chain thermal decay and xylan are the main although debatable causes for heat-induced yellowing of chemical pulps Light-induced yellowing is principally associated with lignin-rich pulps i.

HYP discoloration is dominated by lignin-based reactions including the ketyl, phenoxyl, and phenacyl pathways, phenoxyl quinone redox cycle, and stilbene photodegradation 1617 Quinones and other chromogenic substances are produced through these pathways. Many previous researchers have made valuable progress in methods of inhibiting pulp yellowing. UV absorbers have been proven to be particularly efficient. McGarry et al. Fluorescent whitening agents are another type of substance that can be applied to slow down pulp yellowing 20and studies have shown that chemical modification and paper coating are also effective methods of inhibiting yellowing