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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06 Feb 2019
TL;DR: In this paper, the extraction of silica from rice husk by acid alkaline precipitation method with different temperatures was described, the used of different temperature influenced the morphology of the silica.
Abstract: The research describes the extraction of silica from rice husk by acid alkaline precipitation method with different temperatures. The used of different temperature influenced the morphology of the silica. Rice husk known as local agriculture waste and the technology has been evaluate to less the production of agriculture waste. In this research, precipitation process has been chosen as it low cost, low toxic and less the energy process compared to the other process. According to the Fourier Transform Infrared (FTIR) results, the peaks of Si-O-Si were found when the samples were sintered from 600 °C to 1200 °C. X-Ray Diffraction (XRD) patterns showed the crystallization of amorphous silica became dominant when the temperature is increased. Morphology of silica nanoparticles has been observed under Field Emission Scanning Electron Microscope (FE-SEM) analysis. In this study, precipitated silica can be successfully synthesized using acid alkaline precipitation method.
4 citations
TL;DR: In this paper, the porosity of polyethylene separators is defined as two types of pores in membranes: porosity wettable by water and porosity non-wettable.
4 citations
Patent•
25 Nov 2015
TL;DR: In this article, a powder brightener for improving surface gloss of mortar and adding to mortar powder is described, which is prepared by mixing, by weight, 3-13 parts of fatty acids, 15-35 parts of paraffin wax and 37-77 parts of a disperse adsorbent.
Abstract: The present invention provides a powder brightener for improving surface gloss of mortar and adding to mortar powder The brightener is prepared by mixing, by weight, 3-13 parts of fatty acids, 15-35 parts of paraffin wax and 37-77 parts of a disperse adsorbent First fatty acids and paraffin are mixed evenly; then the disperse adsorbent is placed in a mechanical mixer; and the mixture of fatty acid and paraffin is added to the mixer in a stirring and spraying mode Fatty acid is one or two selected from linoleic acid and oleic acid; paraffin is one or more selected from liquid paraffin, emulsified polyethylene wax and emulsified paraffin; and the disperse adsorbent is one or more selected from zeolite powder, silica fume, precipitated silica, fumed silica, perlite powder and diatomaceous earth The brightener of the present invention is simple in formula and easy for preparation, can be added to the mortar to not only improve the gloss of mortar but also improve the water resistance of mortar, and is particularly suitable for adding to a tile caulking compound or interior wall putty
4 citations
Patent•
26 Mar 2003
TL;DR: In this paper, an Independent claim is also included for hydrophobic precipitated silica with a carbon content of 1-8, a methanol wettability of 20-55%, a remission of more than 94%, a dibutyl phthalate absorption of less than 250 g/100 g, a BET surface area of 50-110 m /g, a CTAB surface area, a Bet/CTAB ratio of 1 or less, and a Sears number of fewer than 13.
Abstract: Production of hydrophobic precipitated silica comprises conditioning a mixture of precipitated silica and an organopolysiloxane at 10-150 degrees C for 0.5-72 hours. An Independent claim is also included for hydrophobic precipitated silica with a carbon content of 1-8%, a methanol wettability of 20-55%, a remission of more than 94%, a dibutyl phthalate absorption of less than 250 g/100 g, a BET surface area of 50-110 m /g, a CTAB surface area of 100-150 m /g, a BET/CTAB ratio of 1 or less and a Sears number of less than 13.
4 citations