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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
17 Oct 2007
TL;DR: In this article, heat-treated metal-doped precipitated silica or silica gel materials with sulfur-containing functional silane surface treatments are provided, which exhibit excellent mercury removal properties from flue gas emissions through the trapping of mercury vapors within a smokestack.
Abstract: Filtration materials comprising heat-treated metal-doped precipitated silica or silica gel materials with sulfur-containing functional silane surface treatments are provided. Such materials exhibit excellent mercury removal properties from flue gas emissions through the trapping of mercury vapors within a smokestack (or other like site). The metal dopant and the sulfur-containing functional silane components applied to the surface of the target metal-doped gels effectuate the desired mercury reactions to permit capture thereof. In combination, such components permit versatile utilization in either a fixed bed configuration or through a dynamic mercury removal procedure. Methods of using and specific filter apparatuses are also encompassed within this invention.

11 citations

Patent
14 Nov 2012
TL;DR: An anti-flaming tear-resisting material for rubber sheath of mine cable and preparation method thereof, wherein the material is composed of the following components: chlorinated polyethylene, carbon black, dibasic lead sulfate, lead stearate, magnesium oxide, trichlorine ethyl phosphate, antimonous oxide, calcium carbonate, dioctyl phthalate, chlorinated paraffin, magnesium hydroxide, precipitated silica, surfactant Gamma-MPTES, vulcanizer dicumyl peroxide and
Abstract: The invention discloses an anti-flaming tear-resisting material for rubber sheath of mine cable and preparation method thereof, wherein the material is composed of the following components: chlorinated polyethylene, carbon black, dibasic lead sulfate, tribasic lead sulfate, lead stearate, magnesium oxide, trichlorine ethyl phosphate, antimonous oxide, calcium carbonate, dioctyl phthalate, chlorinated paraffin, magnesium hydroxide, precipitated silica, surfactant Gamma-MPTES, vulcanizer dicumyl peroxide and vulcanizer assistant TAIC. The chlorinated polyethylene is used as base material and isadded with fire retardant antimonous oxide, chlorinated paraffin and magnesium hydroxide, and trichlorine ethyl phosphate to perform synergistic effect to raise flame retardant property of the rubbersheath material. The reinforcing agent carbon black and the precipitated silica are added to raise the physical and mechanical properties. In addition, the preparation technology is simple and operability is strong.

11 citations

Patent
05 Dec 2005
TL;DR: In this paper, the authors defined a functionalized elastomer which contains functional groups distributed along the polymer chain and/or at its terminal end, such functional groups may be divided into two categories, namely, a first category which promotes adsorptive interactions with precipitated silica and a second category which chemically bonds to the precipitated materials.
Abstract: This invention relates to tires wherein at least a portion of its tire tread containing a running surface is of a rubber composition comprised of a functionalized elastomer, silica reinforcement, particularly precipitated silica aggregates which contain hydroxyl groups (e.g. silanol groups) and a blocked alkoxyorganomercaptosilane coupling agent. The rubber composition may constitute the entire, or major portion of, the running surface of the tread or may be limited to only a longitudinal circumferential strip, or portion, of the running surface of the tread. Such functionalized elastomer is an elastomer which contains functional groups distributed along the polymer chain and/or at its terminal end. Such functional groups may be divided into two categories, namely, a first category which promotes adsorptive interactions with the precipitated silica and a second category which chemically bonds to the precipitated silica. Such functionalized elastomer may contain functional group(s) from either of both of said first and second categories. In addition, said functionalized elastomer may be tin coupled.

11 citations

Book ChapterDOI
TL;DR: A highly calcareous duripan occurs in loamy, mixed, thermic, shallow Typic Durorthids forming in situ on granitic rock pediments in the western Mojave Desert of southern California as mentioned in this paper.
Abstract: A highly calcareous duripan occurs in loamy, mixed, thermic, shallow Typic Durorthids forming in situ on granitic rock pediments in the western Mojave Desert of southern California. The duripan grades to a petrocalcic horizon and consists of weakly cemented carbonates below a thin silicaand calcite-cemented laminar cap. X-ray and electron microbeam and standard petrographic analyses indicate that opaline silica and calcite exist as discrete morphological and mineralogical entities. Calcite is the dominant mineral in the duripan matrix and occurs throughout the pan as spherulitic crystallaria. Opaline silica varies in form, ranging from laminae coating carbonate spheres to spherical and ellipsoid nodules. The dominant phyllosilicate mineral is a dioctahedral smectite. Other minerals in the duripan include quartz, K-feldspar, and plagioclase. Lamination of silica is expressed most strongly in the upper portion of the laminar cap. The degree of lamination decreases and silica nodules become more prevalent in the lower portion of the laminar cap where calcium carbonate composes 70% of the layer. Calcite precipitates as crystallaria in joints of the weathering granodiorite. Laminar silica forms by the precipitation of translocated silica upon contact with the carbonate. The silica nodules form by the replacement of crystalline silicate minerals with amorphous silica, and/or repeated adsorption and polymerization of silica on previously precipitated silica in a dominantly carbonate matrix.

11 citations

Patent
21 Aug 2003
TL;DR: In this article, the authors described compounds, for use as liquid support and as anticaking agent, and simultaneously as nutrient additive in particular for animals, consisting of precipitated silica and phosphate selected among phosphates of elements of groups Ia or IIa of the periodic table of the elements and rare-earth phosphates, being in the form of substantially spherical pellets.
Abstract: The invention concerns compounds, for use as liquid support and as anticaking agent, and, simultaneously, as nutrient additive in particular for animals, consisting of precipitated silica and phosphate selected among phosphates of elements of groups Ia or IIa of the periodic table of the elements and rare-earth phosphates, said compounds being in the form of substantially spherical pellets.

11 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20236
202217
202118
202030
201931
201841