Degumming Pretreatment with Sodium Hydroxide and Sodium Oxalate in the Process of Whole Cotton Stalk APMP Pulping
The effect of degumming pretreatment on whole cotton stalk alkaline peroxide mechanical pulp (APMP) was researched. Degumming pretreatment was used as the first stage of an APMP pulping process, replacing conventional hot water pretreatment. Two degumming agents of sodium hydroxide (NaOH) and sodium...
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North Carolina State University
2015-03-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_2913_Zhao_Degumming_Pretreatment_Sodium_Hydroxide |
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| author | Yu-Meng Zhao Zhong Liu Lan-Feng Hui Qun Li Xin-Shou Li Ying-Jian Huang |
| author_facet | Yu-Meng Zhao Zhong Liu Lan-Feng Hui Qun Li Xin-Shou Li Ying-Jian Huang |
| author_sort | Yu-Meng Zhao |
| collection | DOAJ |
| description | The effect of degumming pretreatment on whole cotton stalk alkaline peroxide mechanical pulp (APMP) was researched. Degumming pretreatment was used as the first stage of an APMP pulping process, replacing conventional hot water pretreatment. Two degumming agents of sodium hydroxide (NaOH) and sodium oxalate (Na2C2O4) were researched separately. The efficiency of hot water pretreatment, NaOH pretreatment, and Na2C2O4 pretreatment on pectin and metal ions removal was compared. After pretreatment of hot water, NaOH, and Na2C2O4, pectin content was reduced to 4.0%, 2.1%, 1.6%, respectively, compared to original material (4.3%), at removal rates of 7%, 51%, and 64%, respectively. For metal ions, especially transition metal ions, the removal rate was up to 20% after degumming pretreatment. The brightness of the handsheets was 64% ISO, 68% ISO, and 73% ISO, respectively. The dirt count was 2674 mm2•m-2, 533 mm2•m-2, and 132 mm2•m-2, respectively. After Na2C2O4 pretreatment, the tension index and tear index were increased to 40.5 N•m•g-1 and 4.5 mN•m2•g-1, respectively. Through degumming pretreatment, pectin, metal ions, and dirt count were reduced efficiently, and the brightness and physical strength were improved significantly. |
| first_indexed | 2024-04-14T07:07:07Z |
| format | Article |
| id | doaj.art-5ebed0b662224c088f221788112ed106 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-04-14T07:07:07Z |
| publishDate | 2015-03-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-5ebed0b662224c088f221788112ed1062022-12-22T02:06:33ZengNorth Carolina State UniversityBioResources1930-21261930-21262015-03-011022913292510.15376/biores.10.2.2913-2925Degumming Pretreatment with Sodium Hydroxide and Sodium Oxalate in the Process of Whole Cotton Stalk APMP PulpingYu-Meng Zhao0Zhong Liu1Lan-Feng Hui2Qun Li3Xin-Shou Li4Ying-Jian Huang5 Tianjin Key Laboratory of pulp and Paper, Tianjin University of Science and Technology; China Tianjin Key Laboratory of pulp and Paper, Tianjin University of Science and Technology; China Tianjin Key Laboratory of pulp and Paper, Tianjin University of Science and Technology; China Tianjin Key Laboratory of pulp and Paper, Tianjin University of Science and Technology; China Tianjin Key Laboratory of pulp and Paper, Tianjin University of Science and Technology; China Tianjin Key Laboratory of pulp and Paper, Tianjin University of Science and Technology; ChinaThe effect of degumming pretreatment on whole cotton stalk alkaline peroxide mechanical pulp (APMP) was researched. Degumming pretreatment was used as the first stage of an APMP pulping process, replacing conventional hot water pretreatment. Two degumming agents of sodium hydroxide (NaOH) and sodium oxalate (Na2C2O4) were researched separately. The efficiency of hot water pretreatment, NaOH pretreatment, and Na2C2O4 pretreatment on pectin and metal ions removal was compared. After pretreatment of hot water, NaOH, and Na2C2O4, pectin content was reduced to 4.0%, 2.1%, 1.6%, respectively, compared to original material (4.3%), at removal rates of 7%, 51%, and 64%, respectively. For metal ions, especially transition metal ions, the removal rate was up to 20% after degumming pretreatment. The brightness of the handsheets was 64% ISO, 68% ISO, and 73% ISO, respectively. The dirt count was 2674 mm2•m-2, 533 mm2•m-2, and 132 mm2•m-2, respectively. After Na2C2O4 pretreatment, the tension index and tear index were increased to 40.5 N•m•g-1 and 4.5 mN•m2•g-1, respectively. Through degumming pretreatment, pectin, metal ions, and dirt count were reduced efficiently, and the brightness and physical strength were improved significantly.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_2913_Zhao_Degumming_Pretreatment_Sodium_HydroxideAPMPDegummingWhole cotton stalk |
| spellingShingle | Yu-Meng Zhao Zhong Liu Lan-Feng Hui Qun Li Xin-Shou Li Ying-Jian Huang Degumming Pretreatment with Sodium Hydroxide and Sodium Oxalate in the Process of Whole Cotton Stalk APMP Pulping BioResources APMP Degumming Whole cotton stalk |
| title | Degumming Pretreatment with Sodium Hydroxide and Sodium Oxalate in the Process of Whole Cotton Stalk APMP Pulping |
| title_full | Degumming Pretreatment with Sodium Hydroxide and Sodium Oxalate in the Process of Whole Cotton Stalk APMP Pulping |
| title_fullStr | Degumming Pretreatment with Sodium Hydroxide and Sodium Oxalate in the Process of Whole Cotton Stalk APMP Pulping |
| title_full_unstemmed | Degumming Pretreatment with Sodium Hydroxide and Sodium Oxalate in the Process of Whole Cotton Stalk APMP Pulping |
| title_short | Degumming Pretreatment with Sodium Hydroxide and Sodium Oxalate in the Process of Whole Cotton Stalk APMP Pulping |
| title_sort | degumming pretreatment with sodium hydroxide and sodium oxalate in the process of whole cotton stalk apmp pulping |
| topic | APMP Degumming Whole cotton stalk |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_2913_Zhao_Degumming_Pretreatment_Sodium_Hydroxide |
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