Topic
Precipitated silica
About: Precipitated silica is a research topic. Over the lifetime, 1401 publications have been published within this topic receiving 20992 citations.
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Patent•
21 Jul 2013
TL;DR: In this paper, a method to recover silicofluoride and phosphate species from wastewaters, or barometric condenser waters, that are typically utilized in wet-process phosphoric acid facilities is described.
Abstract: In particular, in alternative embodiments, the invention provides for a method to recover silicofluoride and phosphate species from wastewaters, or barometric condenser waters, that are typically utilized in wet-process phosphoric acid facilities The species are recovered via a continuous ion exchange approach that allows for economic recovery of the materials and especially with the silicofluoride component allows for the production of valuable industrial materials such as hydrofluoric acid and other fluoride salts as well as industrial-grade precipitated silica materials Return of the treated waste water to the phos-acid plant allows for optimization of reagent usage
21 citations
Patent•
29 Jan 1988
TL;DR: In this paper, a flexible film-forming adhesive polymer, such as polyvinylbutyral, is used to resist fire in a non-flammable volatile solvent such as trichloroethane.
Abstract: A plastic composition which at least when hardened is resistant to fire comprises: a binder comprising a flexible film-forming adhesive polymer, such as polyvinylbutyral, in a volatile solvent, preferably a non-flammable volatile solvent such as trichloroethane, the binder having dispersed therein a fire retardant such as aluminium trihydrate, an exfoliatable mineral, such as vermiculite, and preferably also a thixotropic agent such as precipitated silica.
21 citations
TL;DR: In this article, a simple alkali fusion method has been developed to prepare sodium silicate directly from sand and finally pure precipitated silica by acid precipitation, which was found to be amorphous in nature.
Abstract: The present study reveals a cost benefit process in an open system for utilizing desert sand for preparing sodium silicate or precipitated silica. A simple alkali fusion method has been developed to prepare sodium silicate directly from sand and finally pure precipitated silica by acid precipitation. The reaction weight ratio of alkali to sand reaction parameters are studied for optimizing the silica yield. About 80% pure precipitated silica has been prepared in an open system at 150 °C within 45 min. Wet chemical methods, FTIR, TG-DTA, XRD and SEM techniques are used to characterize the silica prepared from sand available in Saudi Arabian deserts. In the XRD pattern, the peak corresponding to silica was obtained at the diffraction angle of 21.8 ° and it was found to be amorphous in nature.
21 citations
TL;DR: A precipitated silica, produced as a waste product from the Wairakei geothermal field and power station in the central North Island of New Zealand, has been found to be highly active in the hydrothermal synthesis of high quality mesostructured M41S alumino-silicate molecular sieve materials as discussed by the authors.
21 citations
TL;DR: In this paper, precipitated colloidal silica from geothermal discharge waters of Wairakei, New Zealand was used as the raw material to produce silicon nitride.
Abstract: Precipitated colloidal silica from geothermal discharge waters of Wairakei, New Zealand was used as the raw material to produce silicon nitride Mixtures of α and β forms of silicon nitride in the ratio 90/10 to 95/5 were produced by carbothermal reduction and nitridation of this silica in the temperature range 1350 to 1440° C between 2 and 10h Three other commercial fine-grained silicas were also nitrided under the same conditions The geothermal silica was found to be as good if not better than any of these silicas
21 citations