Oxides extracted from vegetal matter and process therefor
AssigneeFundacao de Amparo a Pesquisa do Estado de Sao Paulo
InventorsMilton F. De Souza, Paulo Dos Santos Batista, Jefferson B.L. Liborio
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Abstract
The invention concerns a process for the extraction of acid or basic oxides contained in a vegetal matter, more specifically it concerns the extraction of silica from rice husks. The invention also concerns pure oxides extracted from vegetal matter. The invention also concerns the process for the extraction of carbon-rich oxide compositions from vegetal matter, and compositions obtained through said process.
Claims19
PROCESS FOR THE EXTRACTION OF OXIDES CONTAINED IN VEGETAL MATTER, aiming at obtaining high purity oxides, characterized by the fact that it comprises the following steps:
- A. Hydrolysis above 100° C., under pressure;
- B. Washing/drying;
- C. Fragilization of the structure;
- D. Disaggregation of the structure;
- E. Calcination;
PROCESS FOR THE TRACTION OF OXIDES CONTAINED IN VEGETAL MATTER, aiming at obtaining carbon-rich oxide compositions, characterized by the fact that it comprises the following steps:
- A. Hydrolysis above 100° C., under pressure;
- B. Washing/drying;
- C. Fragilization of the structure;
- optionally followed by the steps of disaggregation of the fragilized material and/or milling.
Dependencies are inferred from the claim text.