Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

Topic: Silica-alumina

    Note: these results are not from the primary (high quality) database.

Ads by Google

In the News (Thu 24 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

Patent 5236680: Preparation of amorphous silica-alumina particles by acid-treating spherical P-type zeolite particles crystallized from a sodium aluminosilicate gel The spherical particles of amorphous silica or silica-alumina according to the present invention are prominently characterized in that although the particles are composed of amorphous silica or silica-alumina, the particles have a definite spherical shape and the surfaces of the spherical particles are notched. The spherical particles of amorphous silica or silica-alumina according to the present invention are relatively dense, and the bulk density is generally in the range of from 0.2 to 1.2 g/ml and especially in the range of from 0.4 to 1.0 g/ml, though the bulk density differs to some extent according to the particle size. In the spherical particles of amorphous silica or silica-alumina according to the present invention, the primary particles size (the particle size according to the electron microscope photo method, that is, 2r1) is in the range of from 0.1 to 20.mu.m, especially from 0.3 to 10.mu.m. www.freepatentsonline.com /5236680.html

Earth Alliance Particle Beam Cannon: Babylon 5 Tech-Manual. All this considered it is a valid and relatively small approximation, to say that Earth's crust is composed of 65% of silica and 35% Alumina, both by weight - basically we substitute the properties of Alumina for the minority of the remaining compounds and retain the value for silica. By these numbers most of the crust is composed of silica/ (silicon and oxygen) and Alumina/ (aluminum and oxygen), with only about a fifth left for the compounds of the other elements. Alumina, or aluminum oxide, its chemical formula is Al2O3, is the other most common mineral in Earth's crust, it is the component of a variety of minerals. www.b5tech.com /science/weapons/particlebeam/particlebeam.html

Column Chromatography Silica gel and alumina are the only column chromatography adsorbents used in the CU organic chemistry teaching labs; please refer to the references for information on other column chromatography adsorbents. Compounds interact with the silica or alumina largely due to polar interactions. Alumina is quite sensitive to the amount of water which is bound to it: the higher its water content, the less polar sites it has to bind organic compounds, and thus the less “sticky” it is. This stickiness or activity is designated as I, II, or III, with I being the most active. orgchem.colorado.edu /hndbksupport/colchrom/colchrom.html

OhioLINK ETD: ALSYOURI, HATEM This thesis investigates the synthesis of ordered mesoporous silica and alumina materials with unique microstructures and different morphologies using novel approaches based on template-assisted synthesis and chemical vapor deposition (CVD) techniques and their potential use in polymer reaction application. Silica plugs grow with thickness of 0.5 mm and have a mesoporous structure. Gas transport in silica fibers is governed by Knudsen and surface diffusion mechanisms. www.ohiolink.edu /etd/view.cgi?ucin1100816267

Outline of the Grid Method The 3 main variables in the base glaze are fluxes, alumina and silica. For example, a glance at a fired standard grid tile reveals immediately the effect of altering alumina or silica on a given set of fluxes. Usually at least one of the flux materials chosen for a set will contain alumina and silica like this. ian.currie.to /books/revealing/chapter2

P15 The silica-alumina composite membranes showed very high selectivities toward hydrogen : the flux ratio of hydrogen over nitrogen exceeded 100. The silica membranes formed by CVD have very high selectivities toward hydrogen, but they suffer from poor stability. And the deposition rate of the silica layer are relatively slow. www.che.utexas.edu /nams/NAMS97_Abs/Posters/P15.html

40. : Alumina-doped silica gradient-index (GRIN) lenses by Slurry-based Three-dimensional Printing (S-3DP [trademark] ) Two different approximately parabolic dopant concentration profiles, which have maximum alumina concentrations of 1.63 mol% and 2.50 mol%, are printed into silica powder beds using S-3DP [trademark]. The samples with maximum alumina concentration of 1.63 mol% have been sintered into optical transparency at 1650anddeg;C for 30 minutes in a vacuum furnace (5andtimes;10-6 torr) while an additional deh ydration process before sintering was required for the samples with maximum alumina concentration of 2.50 mol%. The magnifying effects of GRIN lenses with profiles of 1.63 mol% and 2.50 mol% alumina were observed, yielding effective focal lengths of 10 cm and 6.1 cm, respectively. home.att.net /~rpml/p04a/p04a_40.htm

AllRefer.com - fuller's earth (Geology And Oceanography) - Encyclopedia It is composed mainly of alumina, silica, iron oxides, lime, magnesia, and water, in extremely variable proportions, and is generally classified as a sedimentary clay. In color it may be whitish, buff, brown, green, olive, or blue. reference.allrefer.com /encyclopedia/F/fullerse.html

Desiccant, Activated Alumina and Silica Gel Solid bulk desiccant include silica gel, activated alumina, deliquescent and molecular sieves. Silica gel desiccant - applications include compressed air/gas streams and especially natural gas. Silica Gel has excellent adsorption at mid inlet relative humidity. www.eplantengineer.com /desiccant.shtml?source=business

Allied High Tech: Polishing - Colloidal Silica / Alumina Suspensions An acidic alumina suspension with a pH of 3.5. A non-crystallizing silica suspension with a pH of 9.8. Used for final polishing, colloidal suspensions are mixtures of abrasive particles dispersed throughout a chemically aggressive liquid carrier. www.alliedhightech.com /polishing/colloidalsus

Patent 4039474: Silica-alumina catalysts After successive filtering and spray drying steps the final purified product is a powder where the silica content is 55 to 95% by weight (dry basis) and alumina the balance. In orthosilicate, for comparison the mole ratio is 2Na.sub.2 O:SiO.sub.2 and in meta silicate the mole ratio of alkali to silica is 1:1. To the above precipitated silica gel, 6,420 mls of plant concentrated alum (25% aqueous solution) were added over a period of 17 minutes. www.freepatentsonline.com /4039474.html

Nickel on silica-alumina Chloride Hydrate Alumina Alumina Catalyst Alumina Chlorohydrate Alumina Hydrated Alumina Powder Alumina Silica Alumina Silicate Alumina Trihydrate Aluminum... Superacid properties of alumina, silica-alumina and silica exposed to TiCl4... of Glucose Oxidase on Nickel-Silica Alumina, Biotechnol Bioeng 14, 975, 1972... www.chemindustry.net /chemnames/N/Nickel_on_silica-alumina.html

116. : Stereolithography of ceramics (rapid prototyping, ultraviolet curing, silica, alumina) We have considered a range of ceramic materials, including silica, alumina, and silicon nitride. Stereolithography of ceramics (rapid prototyping, ultraviolet curing, silica, alumina) : Stereolithography of ceramics (rapid prototyping, ultraviolet curing, silica, alumina) home.att.net /~edgrenda2/d00/d00_116.htm

Experimental Applied Physics and Experimental Nuclear Physics Silica and Magnesia Dopant Distributions in Alumina by High Resolution Scanning Secondary Ion Mass Spectrometry. Grain Boundary Chemistry of Alumina by High-Resolution Imaging SIMS. physics.uchicago.edu /x_applied.html

Silicon dioxide They have available silica, alumina, zirconia and ceria abrasives in water suspensions. Alumina / Silica / Boria - Al2O3 70/SiO2 28/B2O3 2 — Supplier Data by Goodfellow It encompasses materials such as vitreous silica, sodium silicate, crystal, borosilicate, opal, phosphate and chalcogenide glasses as well as solder glasses. www.azom.com /SearchResults.asp?MaterialKeyWord=Silicon+dioxide

Silica Gel Manufacturer,Activated Alumina Desiccant,Dehumidifier Silica Gel,Desiccant Silica Gel,Activated Alumina Supplier,India We are manufacturer and supplier of silica gel, silica gel desiccant, activated alumina, alumina oxide etc. Its a unique organization, which provides a technical and correct usage of its product range, namely adsorbents as per theoretical and correct calculations and no assumptions! Pioneer manufacturer and supplier of chemical-substances like silica gel, activated alumina etc obtained by the chemical processes. Desiccant silica gel tablet to adsorb humidity in the packaging of drugs (pharmaceutical industries) and for the protection against corrosion of components in the electronic industry where the small space available is a limiting factor. www.indiamart.com /sorbead-india

Ceramic Fibers, Alumina, Alumina-Silica Bulk Fibers The high alpha alumina content and addition of a grain growth inhibitor give it extreme stability with useful properties to 1800°C (3272°F). Type ALBF-1 Alumina Bulk Fiber is a specially cleaned alumina fiber with relatively short fiber lengths. ZIRCAR Alumina Bulk Fiber Type ALBF consists of long aluminum oxide fibers suited for the vacuum forming of low density shapes. www.zircarceramics.com /pages/fibers

Nanotechnology: Developing Molecular Manufacturing A complete set of reactions for vacuum deposition of arbitrary shapes in a covalent solid has not yet been worked out and verified, but there are quite a few covalent solids that would be useful to build due to their excellent material properties, including diamond, silica, alumina (sapphire), and cubic boron nitride. Silica can be deposited from water; this deposition can be mediated in shirtsleeve conditions by the enzyme silicatein. A silicatein molecule attached to a positioning system might be useful in building silica structures to specified shapes. www.crnano.org /developing.htm

clayart - thread 'silica alumina glaze ratios?' I use abut 4 or 5 to one Silica to Alumina ratio for matts. cone 03 glossy read that above 8:1 silica to alumina is recommended. information about interpreting the silica alumina ratio in glazes? www.potters.org /subject08117.htm

Untitled T-here are available special adsorbents for dry colum chromatography, isotope techniques, dioxin analysis, purification of solvents, polyamides and TLC silica and alumina and TLC plates. www.scitech.cz /icnads.htm

clayart - thread 'firing and alumina to silica ratio' clayart - thread 'firing and alumina to silica ratio' syenite, fine-grained ball clay, china clay or alumina (aluminum oxide). Also for example: the ingredient supplying the silica could be: petalite, www.potters.org /subject19962.htm

Solvent Purification for UV - Spectroscopy I, or a combination of the two with the alumina section of the column above the silica gel section of the column. Depending on the kind of impurities, which depend on the origin and nature of the solvent, the solvent can be filtered through a column filled with Silica Gel, Active, 63-200µm, 60Å, Alumina (Acid, Neutral, or Basic), Act. Technical grade cyclohexane, that is not pre-purified, can easily be purified by filtering through a combined Silica Gel, Active, 63-200µm, 60Å / Alumina Basic, Act. www.sorbtech.com /catalog/catPage1265.htm

The connexion between positronium and the condensation of oxygen on silica and alumina powders The connexion between positronium and the condensation of oxygen on silica and alumina powders Positronium annihilation has been related to the condensation of oxygen on silica and alumina powder. In particular, reselling and systematic downloading of files is prohibited. stacks.iop.org /0953-8984/6/2277

UOP291-02 Total Chloride in Alumina and Silica-Alumina Catalysts by Potentiometric Titration This method is for determining the total inorganic chloride content of fresh or spent alumina and silica-alumina catlysts or catalyst supports. UOP291-02 Total Chloride in Alumina and Silica-Alumina Catalysts by Potentiometric Titration www.astm.org /DATABASE.CART/PAGES/UOP291.htm

Cabot Fumed Metal Oxides - fumed silica, fumed alumina CAB-O-SPERSE® is fumed silica or fumed alumina that has been pre-dispersed in water. Cabot's Fumed Metal Oxides business is made up of two product families: fumed silica and fumed alumina. Due to its versatile nature, CAB-O-SIL® fumed silica is used in a variety of products, ranging from spark plugs and printing inks to pharmaceuticals and cake mixes. w1.cabot-corp.com /controller.jsp?N=23+4294967128+1000&entry=product

Versal Alumina Supports and Activated Alumina Bead Supports UOP has the capability to produce catalyst supports from a variety of materials, including high-purity Versal alumina powders, amorphous silica-aluminas, alumina-bound and silica-bound molecular sieves, clay bound aluminas, and amorphous silicas. UOP also offers spray-drying expertise for the manufacture of customized products using amorphous silica-alumina, alumina, amorphous silica, molecular sieves, clays, alumina metal oxides, and adsorbents. The UOP Specialty Products group offers a full line of standard formed alumina supports and activated alumina bead supports. www.uop.com /adsorbents/7223.html

Product Category Results Oxide Ceramics (Alumina, Zirconia, Silicates) (79 companies) Oxide ceramics include alumina, Zirconia, silica, aluminum silicate, magnesia and other metal oxide based materials. Glass Fabrication Services (115 companies) Glass fabrication services is the manufacturing of glass parts and assemblies using blowing, casting, extrusion, drawing, pressing, heat shrinking or other fabrication processes. Glass Materials (168 companies) Glass materials have a random, liquid like (non-crystalline) molecular structure. globalspec.com /ProductFinder/FindProducts?query=alumina+...+silica

UOP320-86 Sulfate in Alumina or Silica-Alumina Base Catalysts-Turbidimetric Method This method is for determining sulfate in alumina or silica-alumina base catalysts in the range of 0.01 to 0.1 mass-percent. UOP320-86 Sulfate in Alumina or Silica-Alumina Base Catalysts-Turbidimetric Method Catalysts containing higher amounts of sulfate can be analyzed by UOP Method 742. www.astm.org /DATABASE.CART/REDLINE_PAGES/UOP320.htm

FLUORIDE Phosphate rock today has been ground finer than talcum powder, so that a significant part of it is gradually available to the plant... www.apfn.org /apfn/fluoride.htm

Ilmakehätieteiden osasto 147 Anatoli Bogdan, Markku Kulmala 1999 Aerosol silica as a possible candidate for the heterogeneous formation of nitric acid hydrates in the stratosphere. 107 Anatoli Bogdan, Markku Kulmala 1997 Effect of acids on water vapor uptake by pyrogenic silica. 45 Anatoli Bogdan, Markku Kulmala, Boris Gorbunov, Alexander Kruppa 1996 NMR study of Phase transition in pure water and binary H2O/HNO3 films adsorbed on surface of pyrogenic silica. www.atm.helsinki.fi /index.php?action=getfile&file=julkaisut.html

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.