Pulping of Whole Jute Plant (Corchorus capsularies) by Soda-Amine Liquor

Jahan, M. Sarwar; Farouqui, F. I.

doi:10.1515/hf.2000.105

Cited by 17 publications

(14 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ammonia treatments have been used to improve the strength and shrink resistance of cotton and regenerated fabrics (Yanai and Shimizu 2006;Pandey and Nair 1975;Lewin et al 1974) and are being explored as pretreatments for biomass to improve its conversion to glucose and biofuels (Teymouri et al 2005). Ethylenediamine (EDA) has also been investigated for its use in biomass pulping and pretreatment (Jahan and Farouqui 2000;Zargarian et al 1988) and as a component of cellulose solvents (Xiao and Frey 2007). In order to understand the detailed interaction of amines with cellulose and cellulosic biomass fibers we have been studying these interactions using a variety of crystallographic and spectroscopic techniques.…”

Section: Introductionmentioning

confidence: 99%

The structure of the complex of cellulose I with ethylenediamine by X-ray crystallography and cross-polarization/magic angle spinning 13C nuclear magnetic resonance

et al. 2009

View full text Add to dashboard Cite

X-ray crystallographic and cross-polarization/magic angle spinning 13 C nuclear magnetic resonance techniques have been used to study an ethylenediamine (EDA)-cellulose I complex, a transient structure in the cellulose I to cellulose III I conversion. The crystal structure (space group P2 1 ; a = 4.546 Å , b = 11.330 Å , c = 10.368 Å and c = 94.017°) corresponds to a one-chain unit cell with one glucosyl residue in the asymmetric unit, a gt conformation for the hydroxymethyl group, and one EDA molecule per glucosyl residue. Unusually, there are no O-HÁÁÁO hydrogen bonds between the cellulose chains; the chains are arranged in hydrophobic stacks, stabilized by hydrogen bonds to the amine groups of bridging EDA molecules. This new structure is an example of a complex in which the cellulose chains are isolated from each other, and provides a number of insights into the structural pathway followed during the conversion of cellulose I to cellulose III I through EDA treatment.

show abstract

Section: Introductionmentioning

confidence: 99%

The structure of the complex of cellulose I with ethylenediamine by X-ray crystallography and cross-polarization/magic angle spinning 13C nuclear magnetic resonance

et al. 2009

View full text Add to dashboard Cite

show abstract

“…With the addition of 10% EDA charge in kraft process, kappa number reached to 23.6. The slightly decreasing trend in pulp yield with increasing EDA addition may be explained by dissolution of hemicelluloses and lignin (Jahan and Farouqui 2000). This result indicated that substantial increase in alpha-cellulose in pulp, which could be attributed to the selective removal of hemicelluloses and stabilization of alpha-cellulose as indicated by .…”

Section: Effect Of Eda On Delignification and Pentosan Dissolution Frmentioning

confidence: 81%

“…Julien and Sun (1979) also observed better delignification when EDA was added in soda liquor. Jahan and Farouqui (2000) also showed improved delignification and higher pentosan dissolution in presence EDA in soda liquor. Presence of amine in soda liquor altered the molecular weights of the dissolved lignin fraction and delignification is also associated with negative reduction potential of pulping additive .…”

Section: Effect Of Eda On Delignification and Pentosan Dissolution Frmentioning

confidence: 90%

“…Therefore, we have tried to omit the prehydrolysis step by introducing cooking additive, which will dissolve hemicellulose to a considerable amount in the cooking stage. It has been reported in our earlier study (Jahan and Farouqui 2000;Jahan and Farouqui 2001) that ethylenediamine (EDA) in soda liquor increased delignification and hemicellulose dissolution of jute. MacLeod et al (1984) also observed that the soda-EDA process dissolved a large amount of xylan in pulping of spruce.…”

Section: Introductionmentioning

confidence: 92%

See 1 more Smart Citation

Ethylenediamine in alkaline cooking of jute stick for producing dissolving pulp

Jahan

Rahman

Samaddar³

et al. 2015

Bangladesh J. Sci. Ind. Res.

View full text Add to dashboard Cite

Jute stick is the woody portion of jute plant. It remains as the leftover after extracting the fibre. The ratio of the stick to fibre is about 2.5:1. For producing dissolving pulp, prehydrolysis is carried out prior to pulping to remove hemicelluloses from the lignocelluloses. In this investigation ethylenediamine (EDA) was used with the cooking liquor to remove hemicelluloses from the jute stick. Increasing EDA charge in soda and kraft liquor decreased pentosans content in the pulp. EDA in kraft liquor showed lower kappa number and pentosans content than in the soda-liquor. Prehydrolysis further improved cellulose content and kappa number of jute stick pulp with the sacrifice of pulp yield. The bleachability of soda-EDA pulp was inferoior to the kraft-EDA and prehydrolysed soda-EDA in ECF bleaching sequences. The final brightness of soda-EDA pulp was 85.1% and kraft-EDA pulp 89.7%. Degraded cellulose (R 18 -R 10 ) in soda-EDA and kraft-EDA pulps was lower than prehydrolysed pulps. Dissolving pulp can be produced to 93% purity without prehydrolysis by reinforcing EDA in kraft liquor.

show abstract

“…Finally, some authors have also used amines to pulp various raw materials such as beech, spruce, olive tree prunings, jute and cotton [172][173][174][175][176][177][178][179].…”

Section: Ammonia and Aminesmentioning

confidence: 99%

Different Solvents for Organosolv Pulping

Rodríguez¹,

Espinosa²,

Domínguez-Robles³

et al. 2018

Pulp and Paper Processing

View full text Add to dashboard Cite

Organosolv pulping is a two-stage process involving hydrolysis (decomposition of wood by use of a catalyst) and removal of lignin with an organic solvent (usually a mixture of alcohol and water). The main disadvantage of using an alcohol is its low boiling point, which requires operating at a high pressure and hence using special equipment that is expensive to purchase and operate. One solution to this problem is using alternative organic solvents that afford operation at pressure levels similar to those of classic pulping processes (e.g., the Kraft process). This chapter provides a comprehensive literature review on the organosolv-based production of cellulose pulp by using alternative solvents such as glycols, phenols, esters, organic acids, acetone and amines.

show abstract

Pulping of Whole Jute Plant (Corchorus capsularies) by Soda-Amine Liquor

Cited by 17 publications

References 4 publications

The structure of the complex of cellulose I with ethylenediamine by X-ray crystallography and cross-polarization/magic angle spinning 13C nuclear magnetic resonance

The structure of the complex of cellulose I with ethylenediamine by X-ray crystallography and cross-polarization/magic angle spinning 13C nuclear magnetic resonance

Ethylenediamine in alkaline cooking of jute stick for producing dissolving pulp

Different Solvents for Organosolv Pulping

Contact Info

Product

Resources

About