Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/7744
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Ruzene, Denise S. | - |
dc.contributor.author | Gonçalves, A. R. | - |
dc.contributor.author | Teixeira, J. A. | - |
dc.contributor.author | Amorim, M. T. Pessoa de | - |
dc.date.accessioned | 2008-03-25T20:33:50Z | - |
dc.date.available | 2008-03-25T20:33:50Z | - |
dc.date.issued | 2007-04 | - |
dc.identifier.citation | "Applied Biochemistry and Biotechnology". ISSN 0273-2289. 137-140:1-12 (Apr. 2007) 573-582. | eng |
dc.identifier.issn | 0273-2289 | eng |
dc.identifier.issn | 1559-0291 | eng |
dc.identifier.uri | https://hdl.handle.net/1822/7744 | - |
dc.description.abstract | Sugar cane bagasse pulps were obtained by ethanol/water organosolv process under acid and alkaline conditions. The best condition of acid pulping for the sugarcane bagasse was 0.02 mol/L sulfuric acid at 160°C, for 1 h, whereas the best condition for alkaline pulping was 5% sodium hydroxide (base pulp) at 160°C, for 3 h. For the residual lignin removal, the acid and alkaline pulps were submitted to a chemical bleaching using sodium chlorite. Pulps under acid and alkaline conditions bleached with sodium chlorite presented viscosities of 3.6 and 7.8 mPa·s, respectively, and μ-kappa numbers of 1.1 and 2.4, respectively. The pulp under acid condition, bleached with sodium chlorite was used to obtain carboxymethylcellulose (CMC). CMC yield was 35% (pulp based), showing mass gain after the carboxymethylation reaction corresponding to 23.6% of substitution or 0.70 groups −CH2 COONa per unit of glucose residue. The infrared spectra showed the CMC characteristic bands and by the infrared technique it was possible to obtain a substitution degree (0.63), similar to the substitution degree calculated by mass gain (0.70). | eng |
dc.description.sponsorship | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | por |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado Científico e Tecnológico (FAPESP) | por |
dc.language.iso | eng | eng |
dc.publisher | Humana Press | eng |
dc.rights | openAccess | eng |
dc.subject | Acid and alkaline catalyzed ethanol pulping | eng |
dc.subject | Carboxymethylcellulose | eng |
dc.subject | Chemical bleaching | eng |
dc.subject | Infrared spectra | eng |
dc.subject | Sugarcane bagasse | eng |
dc.subject | Organosolv pulping | eng |
dc.title | Carboxymethylcellulose obtained by ethanol/water organosolv process under acid conditions | eng |
dc.type | article | por |
dc.peerreviewed | yes | eng |
sdum.number | 1-12 | eng |
sdum.pagination | 573-582 | eng |
sdum.publicationstatus | published | eng |
sdum.volume | 137-140 | eng |
oaire.citationStartPage | 573 | por |
oaire.citationEndPage | 582 | por |
oaire.citationIssue | 1-12 | por |
oaire.citationVolume | 137 | por |
dc.identifier.doi | 10.1007/s12010-007-9080-0 | por |
dc.identifier.pmid | 18478417 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Applied Biochemistry and Biotechnology | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Ruzene_ABB.pdf | 563,12 kB | Adobe PDF | Ver/Abrir |