Preparation of alumina microspheres
Creators
- 1. Instituto de Pesquisas Energeticas e Nucleares, Sao Paulo (Brazil). Centro de Engenharia Quimica
Description
Inorganic exchangers are widely used for adsorption and column partition chromatography. The main difficulty of using commercial alumina (in powder) for column chromatography is related to its packing, and the operations through the column become diffcult and time-consuming; also it turns to be virtually impossible to use large dimension columns. In order to eliminate these problems, a process for the preparation of alumina micro-spheres was developed as an adaptation of a similar process used to prepare nuclear fuel microspheres (UO2, ThO2). The flowsheet of this process is presented together with the analytical results of sphericity after calcination, granulometry, density and characterization by X-ray diffractometry. Solubility tests showed that the so-prepared microspheres are well resistant to strong acids and bases; retention tests showed their efficiency, mainly to copper. (C.L.B.)
Abstract (Portuguese)
Trocadores inorganicos sao bastante usados em cromatografia de adsorcao e em cromatografia de particao em coluna. O problema da utilizacao de aluminas comerciais comuns (em po) em cromatografia de coluna e seu empacotamento, tornando-se dificeis e demoradas as operacoes atraves da coluna e praticamente impossivel a utilizacao de colunas de grandes dimensoes. Com o objetivo de eliminar essas dificuldades, adaptou-se um processo de preparacao de microesferas de combustiveis nucleares (UO2, ThO2) para preparar microesferas de alumina. Apresenta-se o fluxograma desse processo e os resultados das analises de esfericidade apos calcinacao, granulometria, densidade e caracterizacao por difracao de raios-X. Os ensaios de solubilidade mostraram uma resistencia relativamente grande aos ataques acidos e alcalinos, assim como os ensaios de retencao mostraram boa eficiencia, principalmente para o cobre. (Autor)Additional details
Additional titles
- Subtitle (English)
- Its application as in inorganic exchanger
- Original title (Portuguese)
- Preparacao de microesferas de alumina
- Original subtitle (Portuguese)
- Aplicacao como trocador inorganico.
Publishing Information
- Journal Title
- An. Assoc. Bras. Quim.
- Journal Volume
- 31
- Journal Issue
- 3/4
- Series
- An. Assoc. Bras. Quim.
- Journal Page Range
- 41-46
- ISSN
- 0365-0073
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 16023723
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM OXIDES; CHEMICAL PREPARATION; DENSITY; DIAGRAMS; EXTRACTION CHROMATOGRAPHY; ION EXCHANGE MATERIALS; MICROSPHERES; SOLUBILITY; THORIUM 234; X-RAY DIFFRACTION
- Descriptors DEC
- ACTINIDE NUCLEI; ALUMINIUM COMPOUNDS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHALCOGENIDES; CHROMATOGRAPHY; COHERENT SCATTERING; DAYS LIVING RADIOISOTOPES; DIFFRACTION; EVEN-EVEN NUCLEI; HEAVY NUCLEI; INFORMATION; ISOTOPES; MATERIALS; NUCLEI; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADIOISOTOPES; SCATTERING; SEPARATION PROCESSES; SYNTHESIS; THORIUM ISOTOPES