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  • Silica gel is a granular, porous form of silica made synthetically from sodium silicate. Despite the name, silica gel is a solid. Silica gel is most commonly encountered in everyday life as beads packed in a semi-permeable plastic. In this form, it is used as a desiccant to control local humidity in order to avoid spoilage of some goods. Because of poisonous dopants and their very high absorption of moisture, silica gel packets usually bear warnings for the user not to eat the contents, but to throw them away instead.
  • Silicon is the fourteenth element of the periodic table and is a Group IVA element, along with carbon germanium, tin and lead. Pure silicon is a dark gray solid with the same crystalline structure as diamond. Its chemical and physical properties are similar to this material. Silicon has a melting point of 2570° F, a boiling point of 4271° F, and a density of 2.33 g/cm3.When silicon is heated it reacts with the halogens to form halides. It reacts with certain metals to form silicides and when heated in an electric furnace with carbon, a wear resistant ceramic called silicon carbide is produced.
  • The colloidal silica has very different stabilizing by it’s own pH degree. In general the higher the concent- ration or the smaller the particle size, the greater the effect of change of pH. The silica sols are extraordinarily stable at pH 2 where the zeta potential is zero and become increasingly sensitive to electrolytes at higher pH. The particles in colloidal silica are stable above the pH 8 that is to be seen right fig. Most of SILIFOG® S are stands between 9 and 10.5, it means all of SILIFOG® S are stable in constructionally. The SILIFOG® AC is stable as pH 2 , it’s the one and only as a acidity production.
  • Silica was extracted from rice hulls by three processing routes, starting with acid treatment followed by burning and milling. The amorphous white silica powder showed a surface area of 260 to 480 m2/g, purity above 99% and average particle size of 2.0 to 0.6 mm. This silica is suitable for the preparation of mullite whiskers employing the rare earth aluminosilicate glass technique. Due to its highly pozzolanic reaction, this prepared silica is used as an additive in high performance concrete.
  • Silicon metal is made from the reaction of silica (silicon dioxide, SiO2) and carbon materials like coke, coal and wood chips. Silica is typically received in the form of metallurgical grade gravel. This gravel is 99.5% silica, and is 3 x 1 or 6 x 1 in (8 x 3 cm or 15 x 3 cm) in size. The coal is usually of low ash content (1-3% to minimize calcium, aluminum, and iron impurities), contains around 60% carbon, and is sized to match that of the gravel. Wood chips are usually hardwood of 1/2 x 1/8 inch size (1 x. 3 cm size). All materials are received as specified by the manufacturer.
  • The basic process heats silica and coke in a submerged electric arc furnace to high temperatures. High temperatures are required to produce a reaction where the oxygen is removed, leaving behind silicon. This is known as a reduction process. In this process, metal carbides usually form first at the lower temperatures. As silicon is formed, it displaces the carbon. Refining processes are used to improve purity.
  • Colloidal silica polishing suspensions are unique because they provide both a dispersing action as well as a chemical mechanical polishing (CMP) action. It is effective as an additive for the intermediate diamond polishing of metals and is also the best polishing abrasive for eliminating subsurface and surface damage in ceramics because of its CMP polishing action.
  • Unimin Corp. of the United States, is the largest producer of silica in Quebec. Silica is mined from a quartzite deposit at Saint Donat and from a sandstone deposit at Saint Canut. Most of the silica produced by Unimin Limited originates from Saint Canut where the ore is crushed, screened and beneficiated by magnetic separation. The production capacity of the Saint Canut plant is about 550 000 t/y of finished products. Most of Unimin’s output is used in the production of glass containers, flat glass, fibreglass, and in the silicon carbide industries.
  • In 2000, Canada imported 13.1% less silica compounds compared to 1999. Imports fell from 444 171 t to 392 743 t even though their value increased from $95 million to $102.9 million. Imports from the United States come from loosely consolidated and easily processed sandstones or lake sand deposits located near the Great Lakes. Major U.S. operations are located in the states of Illinois, Wisconsin, Michigan and Indiana.
  • Atlantic Silica Inc. mines a large unconsolidated high-grade (+99% SiO2) silica deposit near Sussex. The company produces lump silica and silica sand of various sizes. Fine sand products are sold in the Maritimes, Quebec, and the northeastern United States for use in sandblasting, filter sand, traction sand, cement and concrete manufacturing, refractory use and decorative sand, and as a flux for ase-metal smelters; the sand could also be used in glassmaking.
  • Canadian silica production (shipments) seems to have reached a high in 1994 and a reprieve in 1998, but has maintained a slight decline since then. Production in Alberta has increased progressively since 1994 while production in Quebec since 1995 and in Ontario since 1996 has remained relatively flat.
  • In 1995, imports of silica sand for use in foundries were 373 596 t valued at $12.03 million; in 1992 they were 315 191 t valued at $5.89 million, while in 1990 they were 589 162 t valued at $8.99 million. In 1995, imports of silica sand for use in glassmaking were 189 841 t valued at $2.94 million; in 1992 they were 101 230 t valued at $0.995 million and in 1990 they were 152 028 t valued at $1.49 million.
  • Electronic applications accounted for most industrial uses of quartz crystal; other uses included special optical applications
  • Virtually all quartz crystal used for electronics was cultured rather than natural crystal.
  • Electronic-grade quartz crystal was essential for making filters, frequency controls, and timers in electronic circuits employed for a wide range of products, such as communications equipment, computers, and many consumer goods, such as electronic games and television receivers
  • Limited resources of natural quartz crystal suitable for direct electronic or optical use are available throughout
    the world. World dependence on these resources will continue to decline because of the increased acceptance of cultured quartz crystal as an alternative material; however, use of cultured quartz crystal will
    mean an increased dependence on lascas for growing cultured quartz
  • Quartz crystal is the best material for frequency-control oscillators and frequency filters
    in electronic circuits. Other materials, such as aluminum orthophosphate (the very rare mineral berlinite), langasite, lithium niobate, and lithium tantalate, which have larger piezoelectric coupling constants, have been studied and used. The cost competitiveness of these materials, as opposed to cultured quartz crystal, is dependent on the type of application the material is used for and the processing required
 General Information
  • Silicon dioxide
  • Fused quartz
  • Silica gel
  • Silica-Fumed silica
  • Base Silica-Gel
  • Crystalline silica primer
  • Silica aerogel cellular structures
  • Introduction to functionalized silica gel and alumina

Manufacturing Process

  • Micronized silica gel production process
  • Manufacturing process of silicon
  • Manufacturing process of silica gel beer
  • Production of silica from ash
  • Production of precipitated silica from rice husk
  • Production of silicates and gels using of silica extracted from hydrothermal solution
  • Manufacture of silica sols from separated geothermal water

Company Profiles

  • Ananta Industries
  • Bee Chems
  • Daiso
  • Madhu Silica
  • Malpro Silica
  • MLA Group
  • Newburgh Specialized Chemicals
  • Norinco  
  • Rhodia Silica Systems
  • SGE Analytical Science 
  • Supersil Chemicals

Functions and Properties

  • Magnetic silica colloids for catalysis
  • Chemical modification of silica surface by immobilization of functional groups
  • Self-catalyzed water reactions with silica
  • Solubility of amorphous silica in water at high temperatures and high pressures
  • Shear-induced microstructural changes in flocculated suspensions of fumed silica
  • Characteristics of hydrophobic fumed and precipitated silica
  • Characteristics of colloidal silica
  • Microstructural and mechanical properties of silica
  • Microstructure, Interfacial interaction and properties of silica
  • Structure and properties of silica nanoclusters at high temperatures
  • Properties of pharmaceutical grade fumed silica
  • Properties and functions of untreated fumed silica
  • Effect of silica sol of different routes on the properties of low cement castables

Consultants

  • CMC, Inc.
  • Daniel D. Perlmutter
  • Gunars Indars
  • Expert in applied silica chemistry
  • John Robert Schlup
  • Meyer R. Rosen
  • Stratum Resources 

Material Safety Data Sheet

  • Silicon
  • Si-coat
  • Untreated fumed silica
  • Silicon atomic absorption standard
  • Silicon carbide powder
  • SF1 Polishing Fluid
  • Silica Fume, Amorphous
  • Silicone Vacuum Grease
  • Silica gel
  • Iron Base Magnetic Core

Applications

  • Silicon: An overlooked trace mineral
  • Applications of rice hull-derived Silica
  • Working of silica fume
  • Industrial silica applications
  • Silicas for battery separators
  • Silicate in leather production
  • Colloidal silica polishing
  • Moisture sensitive component storage
  • Stain–resistant sol–gel silica coatings on stoneware tile
  • Silica suspension and coating developments for advanced LIGO
  • Rare earth low silica glasses for optical applications
  • Improving GTA weld penetrations in aluminium alloys through silica applications
  • Polymer-Silica nanoparticles composite films as protective coatings for stone-based monuments
  • Fumed silica in cosmetic and personal care products
  • Silica gel as carrier in controlled drug delivery in tissue administration
  • Colloidal silica as a nanostructured binder for refractory castables

Projects and Case Studies

  • The Artemis project
  • Fumed silica China Project
  • Co-production of silica from geothermal fluids
  • Crystalline silica exposure assessment Project
  • Chemical behaviour of geothermal silica after precipitation from geothermal fluids
  • Silica extraction at the Mammoth lakes geothermal site
  • Chlorine free technology for solar-grade silicon manufacturing
  • The nature of the acidity of amorphous silica-alumina catalyst support and its role in the hydrotreating process
  • Assessment of the carcinogenic effect of silica dust
  • Biofabrication of nanostructured silica and use of enzymes involved in metabolism of biogenic silica
  • Project on the status of silica dust and noise exposure in the mining industry
  • Silica used as filler in rubber matrix
  • Membrane filtration of colloidal silica
  • Case study:Silica
  • Harnessing the power of a grain of sand
  • Batteries for advanced transportation technologies program
  • Reaction Mechanism of Magnesium Silicates with Carbon Dioxide in Microwave Fields
  • Demonstration of amended silicates for mercury control at Miami fort unit 6
  • Preparation of High Purity Silica Glass by Hydrogel Technique
  • Preparations of Silica Slurry for Wafer Polishing via Controlled Growth of Commercial Silica Seeds
Patent 
  • Silica
  • Silanized Silica
  • Silica gel
  • Doped precipitated silica
  • Method of Making Colloidal Silica
  • Defluorination of fumed silica
  • Aqueous colloidal dispersion of fumed silica without a stabilizer
  • Method of generating an aqueous suspension of colloidal silica
  • Integration of ceramic membrane into a silicon oxide production plant
  • Ultrapure colloidal silica for use in chemical mechanical polishing applications
  • Use of silica as agent for controlling the degradation of bicarbonate, resulting mixture and its application

Technology

  • Commercial silica production from geothermal brines
  • Large-scale production of titania nano-coated silica-gel beads by fluidized bed chemical vapor deposition
  • Increasing the compactability of echinacea purpurea powder using starch 1500® and fumed silica
  • POU filtration of silica-based CMP slurries
  • Silica free foundry at silica sand prices
  • Stabilization of colloidal silica using small polyols.
  • Colloidal polystyrene-silica hybrid particles prepared via alcoholic dispersion polymerisation
  • Development of porous silica production by hydrothermal method
  • Detection of decay in wood treated with modified oil

Products

  • Ultrafine silica gels
  • Aerosil and silanes
  • AVSil Laminated/Coated Silica Fabrics
  • AVSil Silica Textiles
  • PPG Silica Products
  • Rhodia silica products
  • Silica products from Fisher Scientific

Plants

  • ABB Limited Silica analyzers
  • EMD Chemicals silica gels production plant
  • Makall group silica production plant
  • Qingdao Haiyang Chemical Plant
  • Vilnius Silica Brick Plant
  • Degussa Expands Silane Capacity-New Production Plant for Solar Silicon

Market and Report

  • Market demand of silica
  • Overview of market of silica
  • Overview of silica sand market
  • Overview of precipitated silica market
  • Biogenic silica accumulation in the sediments of iron Gate I reservoir on the Danube river
  • Innovation in traditional CMP applications
  • Degussa developed silica- silane technology
  • Silica in drinking water
  • Novel Processing route to Fabricate Low Cost Fused Silica Ceramic Foam
  • Machery- Nagel Report
  • Degussa annual report 2007
  • Wacker chemie AG annual report
  • The Nebraska State Recycling Association report
  • Study of a novel silica gel
  • Silica fume resurges report
  • Nalco annual report
  • NewCo Pharmaceuticals LLC report
  • Taking corporate responsibility seriously
  • The silica industry in the republic of South Africa
  • Specialty silica summit
  • Silica Saudi Arabia - 2006
  • Silica/Quartz - Canada 2006
  • Silica market in 2002
  • Silica market in 2003
  • Silica market in 2004
  • Silica market in 2005
  • Silica market in 2006
  • Silica Data - 2007
  • Silica Data - 2008
  • Silica Data - 2009
  • Silica Data - 2010
  • Industrial Quartz Crystal - 2009
  • Industrial Quartz Crystal - 2010
  • Industrial Quartz Crystal - 2011
  • Industrial Quartz Crystal - 2012
  • Quartz Crystal ( Industrial) 2008
  • Quartz Crystal ( Industrial) 2007
  • Quartz Crystal ( Industrial) 2007 & 2008
  • Sand & Gravel ( Industrial) 2000 to 2008

Manufacturers and Suppliers

Colloidal Silica

  • Suppliers of colloidal silica in Maharashtra
  • China suppliers of colloidal silica
  • Indian exporters of colloidal silica
  • Suppliers of colloidal solutions and nanoparticles
  • Sell trade leads of colloidal silica
  • Selling leads of colloidal silica
  • Colloidal silica suppliers
Fumed Silica
  • China suppliers of fumed silica
  • Foreign exporters of fumed silica
  • Indian exporters of fumed silica
  • Selling leads of fumed silica
  • Sell offers of fumed silica
  • Sell trade leads of fumed silica
Silica Gel
  • China suppliers of silica gel
  • Silica gel exporter
  • Indian exporters of silica gel
  • Silica gel manufacturers directory
  • Selling leads of silica gel
  • Silica gel suppliers
Precipitated Silica
  • Kunal Chemical Company
  • China suppliers of precipitated silica
  • Precipitated Silica suppliers in Maharashtra
  • Precipitated Silica manufacturers
  • Selling leads of Precipitated Silica
  • Precipitated Silica suppliers

Buyers

  • Jay Chem Marketing
  • Foreign importers of precipitated silica
  • Indian importers of precipitated silica
  • Foreign importers of silica gel
  • Indian importers of silica gel
  • Silica gel buy offers
  • Foreign importers of fumed silica
  • Indian importers of fumed silica
  • Silica buyers list 1
  • Silica buyers list 2

Equipment Suppliers

  • Bogging machine suppliers
  • Convenyor Belt suppliers
  • Suppliers of cyclone separator
  • Silica filter manufacturers
  • Fluid energy mill suppliers
  • Mixing unit suppliers
  • Vaccum feeder manufacturers
  • Washing/Drying unit manufacturers
  • Water vessel suppliers

 Safety and Guides

  • Minerals Planning Guidance
  • Fumed silica and fumed alumina application and selection guide
  • Working safely with untreated fumed silica
  • Hazard recognition of silica
  • Silica dust exposures can cause silicosis

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