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http://nopr.niscpr.res.in/handle/123456789/32628| Title: | Evaluation of Grevillea robusta as a raw material for the production of dissolving pulp and viscose rayon |
| Authors: | Madan, R N Roymoulik, S K |
| Keywords: | Dissolving pulp;Filterability value;Grevillea robusta;Kraft pulping;Viscose rayon |
| Issue Date: | Dec-1990 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Grevillea robusta, on chemical analysis, showed very high pentosan content (19.9%), average extractives (5.35%) and low lignin (22.39%) and inorganic (0.76%) contents. Prehydrolysis followed by kraft cooking was carried out by varying the prehydrolysis and cooking conditions to obtain the desired characteristics of unbleached pulp, i.e. low permanganate number (5.2-7.4), low pentosan (2.47-2.92%) and low viscosity (24.65-38.82 cP). The unbleached pulp was bleached using C - E - H - D - C.C - SO2 sequence under controlled conditions. Bleached pulps with brightness of 87 .6-91.3% (EL) were obtained on bleaching. The bleached pulps contained 95.4-96.52% α-cellulose 0.06% inorganic matter and the copper number of pulps Was in the range of 0.39-0.50. The bleached pulp was evaluated for the production of dissolving-grade pulp by measuring the filterability of viscose made out of it. The filterability value of viscose was 227 KWc, which conforms to the required dissolving pulp characteristics. The fibre spun from viscose on the standard prototype spinning machine was tested for strength characteristics and found comparable to the commercial rayon fibres. |
| Page(s): | 180-184 |
| ISSN: | 0975-1025 (Online); 0971-0426 (Print) |
| Appears in Collections: | IJFTR Vol.15(4) [December 1990] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJFTR 15(4) 180-184.pdf | 756.39 kB | Adobe PDF | View/Open |
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