DERESINATION OPTIONS IN SULPHITE PULPING
Three methods for improved deresination of sulphite pulps were evaluated, namely, alkaline washing, enzyme treatment, and pulp fractionation. Alkaline washing appears to come at a high cost, because caustic is expensive and affects cellulose chain length, as indicated by lower viscosity of the pulp...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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North Carolina State University
2010-02-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_05_1_0187_Sithole_SZLPP_Deresination_Sulphite/500 |
| _version_ | 1818362260641284096 |
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| author | Bruce Sitholé Salma Shirin Xiao Zhang Luc Lapierre Jorge Pimentel Mike Paice |
| author_facet | Bruce Sitholé Salma Shirin Xiao Zhang Luc Lapierre Jorge Pimentel Mike Paice |
| author_sort | Bruce Sitholé |
| collection | DOAJ |
| description | Three methods for improved deresination of sulphite pulps were evaluated, namely, alkaline washing, enzyme treatment, and pulp fractionation. Alkaline washing appears to come at a high cost, because caustic is expensive and affects cellulose chain length, as indicated by lower viscosity of the pulps. Thus this is not a viable option for pulps that are sensitive to changes in viscosity. Enzyme treatment did not completely degrade the glycerides under the mill conditions used. Fibre fractionation studies showed that the fines fractions contained 8 to 13 times more residual lipophilic extractives than the whole pulps. Removing this fraction, which represents only a small percentage of the whole pulp, could reduce by about a half the amount of lipophilic extractives in the remaining pulp. Thus pulp fractionation appears to be a viable option to achieve further deresination of sulphite pulps. |
| first_indexed | 2024-12-13T21:29:45Z |
| format | Article |
| id | doaj.art-435fcbf344b64c4a8903bfe0b708258e |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-12-13T21:29:45Z |
| publishDate | 2010-02-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-435fcbf344b64c4a8903bfe0b708258e2022-12-21T23:30:51ZengNorth Carolina State UniversityBioResources1930-21262010-02-0151187205DERESINATION OPTIONS IN SULPHITE PULPINGBruce SitholéSalma ShirinXiao ZhangLuc LapierreJorge PimentelMike PaiceThree methods for improved deresination of sulphite pulps were evaluated, namely, alkaline washing, enzyme treatment, and pulp fractionation. Alkaline washing appears to come at a high cost, because caustic is expensive and affects cellulose chain length, as indicated by lower viscosity of the pulps. Thus this is not a viable option for pulps that are sensitive to changes in viscosity. Enzyme treatment did not completely degrade the glycerides under the mill conditions used. Fibre fractionation studies showed that the fines fractions contained 8 to 13 times more residual lipophilic extractives than the whole pulps. Removing this fraction, which represents only a small percentage of the whole pulp, could reduce by about a half the amount of lipophilic extractives in the remaining pulp. Thus pulp fractionation appears to be a viable option to achieve further deresination of sulphite pulps.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_05_1_0187_Sithole_SZLPP_Deresination_Sulphite/500ExtractivesPitchEnzymesFractionationAlkaline washingSulphiteDissolving pulps |
| spellingShingle | Bruce Sitholé Salma Shirin Xiao Zhang Luc Lapierre Jorge Pimentel Mike Paice DERESINATION OPTIONS IN SULPHITE PULPING BioResources Extractives Pitch Enzymes Fractionation Alkaline washing Sulphite Dissolving pulps |
| title | DERESINATION OPTIONS IN SULPHITE PULPING |
| title_full | DERESINATION OPTIONS IN SULPHITE PULPING |
| title_fullStr | DERESINATION OPTIONS IN SULPHITE PULPING |
| title_full_unstemmed | DERESINATION OPTIONS IN SULPHITE PULPING |
| title_short | DERESINATION OPTIONS IN SULPHITE PULPING |
| title_sort | deresination options in sulphite pulping |
| topic | Extractives Pitch Enzymes Fractionation Alkaline washing Sulphite Dissolving pulps |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_05_1_0187_Sithole_SZLPP_Deresination_Sulphite/500 |
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