Conversion of rice hull ash into soluble sodium silicate



Título del documento: Conversion of rice hull ash into soluble sodium silicate
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312923
ISSN: 1516-1439
Autores: 1


Instituciones: 1Universidade Federal de Santa Maria, Departamento de Engenharia Quimica, Santa Maria, Rio Grande do Sul. Brasil
Año:
Periodo: Jul-Sep
Volumen: 9
Número: 3
Paginación: 335-338
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés Sodium silicate is used as raw material for several purposes: silica gel production, preparation of catalysts, inks, load for medicines, concrete hardening accelerator, component of detergents and soaps, refractory constituent and deflocculant in clay slurries. In this work sodium silicate was produced by reacting rice hull ash (RHA) and aqueous sodium hydroxide, in open and closed reaction systems. The studied process variables were time, temperature of reaction and composition of the reaction mixture (expressed in terms of molar ratios NaOH/SiO2 and H2O/SiO2). About 90% silica conversion contained in the RHA into sodium silicate was achieved in closed system at 200 °C. The results showed that sodium silicate production from RHA can generate aggregate value to this residue
Disciplinas: Ingeniería,
Química
Palabras clave: Ingeniería de materiales,
Ingeniería química,
Química industrial,
Silicato de sodio,
Residuos orgánicos,
Arroz,
Tratamiento químico
Keyword: Engineering,
Chemistry,
Chemical engineering,
Materials engineering,
Industrial chemistry,
Sodium silicate,
Organic wastes,
Rice,
Chemical treatment
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