| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313161 |
| ISSN: | 0100-4042 |
| Authors: | Ventorim, Gustavo1 Colodette, Jorge Luiz2 |
| Institutions: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Departamento Engenharia Industrial Madeireira, Itapeva, Sao Paulo. Brasil 2Universidade Federal de Vicosa, Departamento Engenharia Florestal, Vicosa, Minas Gerais. Brasil |
| Year: | 2006 |
| Season: | Sep |
| Volumen: | 29 |
| Number: | 5 |
| Pages: | 922-925 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The effect of pH on the performance of the ozonolysis stage in pulp production was evaluated for conventional and acid treated brown and oxygen delignified eucalyptus kraft pulps. The objective was to determine separately the effects of lignin and hexenuronic acid on the performance of the ozonolysis stage. The reaction of ozone with hexenuronic acid is less sensitive to pH than the reaction of ozone with lignin. The efficiency and the selectivity of the reaction of ozone with pulp decreases after removal of hexenuronic acids. Increasing up to 7.0 the pH during the ozonolysis is viable in the sequence Z/D(EOP)D, resulting in savings of H2SO4 (8,5 kg/tsa) and NaOH (5 kg/tsa), but is not recommended in the sequence Z/ED(PO) |
| Disciplines: | Química, Agrociencias |
| Keyword: | Química industrial, Silvicultura, Pulpa kraft, Ozonólisis, Delignificación, Acidos hexenurónicos, pH |
| Keyword: | Chemistry, Agricultural sciences, Industrial chemistry, Silviculture, Kraft pulp, Ozonolysis, Delignification, Hexenuronic acids, pH |
| Full text: | Texto completo (Ver HTML) |
