Caracterização química e estudo dos efeitos das variáveis de polpação kraft e soda do línter de algodão

• Autor(a) principal: Rodrigues, Claudinei Henrique Ferreira [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203711; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2020-01-20/000919630.pdf
• topic: Algodão; Polimerização; Polpação alcalina por soda; Polpação alcalina por sulfato; Celulose; Cotton

Cotton linter is currently a by-product of the cotton industry, the fiber being closest to cotton seed. Failure to remove this fiber can cause problems, especially in machines that redo planting seeds in the field and can clog the nozzles from which the seeds emerge. The use of this linter can be a revolution in the cotton agroindustry, since it is currently seen as an agent that ends up disrupting the process. In search of new sources of raw material for the production of pulp, the industry invests every year in research in this sector. The variables of pulping, be they kraft or soda, are very important to know the ideal conditions to obtain a raw material of good quality, and with a good yield, with a great financial return. The degree of polymerization of the cellulose is one of the main factors to be analyzed when it is desired to prepare pulp for dissolution. The conditions analyzed in this study were of active alkali varying between 10%, 12%, 14% and 16% for the soda and kraft pulp, with the difference only in sulphidity for kraft pulping, alternating between 15% and 25%, all in percentage volume of solution per volume of cooking liquor. The pulping conditions were kept unchanged at 160 ° C maximum temperature, 60-minute digester heating ramp and baking for 90 minutes, all in a 5:1 ratio of liquor:linter. The results were satisfactory due to the self-degree of polymerization of the cotton pulp cellulose, especially the sulphide kraft pulps up to 15%, where the degree of polymerization increased as the active alkali was increased