What is Sodium Silicate?
Sodium silicate is the general name for the chemical compounds Na 2xSi yO 2y + x or (Na 2O) x·(SiO2)y, for example sodium metasilicate Na2SiO3, sodium orthosilicate Na4SiO4 and sodium pyrosilicate Na6Si2O7. Anions are usually polymeric. These compounds are usually colorless transparent solids or white powders and are soluble in varying amounts of water.
Sodium silicate is the technical and general name for a mixture of such compounds, especially metasilicate, also called water glass, water glass or liquid glass. The product has a wide variety of uses, including cement formulation, passive fire protection, textile and timber processing, refractory ceramics production, as an adhesive, and silica gel production. Commercial product in aqueous solution or solid form is usually greenish or blue due to the presence of iron-containing impurities.
In industry, various grades of sodium silicate are characterized by weight ratios SiO2:Na2O (which can be converted to molar ratio by multiplying 1.032). The ratio can vary from 1:2 to 3.75:1. Grades with a ratio of less than 2.85:1 are called alkaline. Those with a higher SiO2:Na2O ratio are defined as neutral.
How is Sodium Silicate produced?
Sodium silicate solutions can be produced by treating a mixture of silica (usually as quartz sand), caustic soda, and water with hot steam in a reactor.
2x NaOH + SiO2 → (Na2HE)xSiO2 + x H2HE
Sodium silicates also silica SiO2 It can also be obtained by dissolving (melting point 1713°C) in molten sodium carbonate (melting by decomposition at 851°C).
x na2CO3 + SiO2 → (Na2HE)xSiO2 + CO
The material can also be obtained from sodium sulfate (melting point 884 °C) with carbon as the reducing agent:
2x na2SO4 + C + 2 SiO2 → 2 (Na2HE)xSiO2 + 2 SO2 + CO2
What does Sodium Silicate look like?
Colorless odorless whitish crystalline form or liquid
What is the molecular formula of Sodium Silicate?
Molecular Formula: Na4O4Si
In which sectors is Sodium Silicate used?
- water treatment
- Papermaking industry
- Construction and filling material construction
- in the drilling industry
- in the field of construction
- water glass, thermal insulation
- Iron and steel industry
- Textile industry, dyeing industry
- Safe and security industry
- Wine and beer production
- cosmetics industry
- Food industry
What are the uses (processes) of Sodium Silicate?
- The main applications of sodium silicates are detergents, paper, water treatment and building materials.
- The greatest application of sodium silicate solutions is their use as a reinforcing, concreting agent for cardboard production.
- Sodium silicate is often used in drilling fluids to stabilize borehole walls and prevent borehole walls from collapsing.
- With sodium silicate solution, it helps to reduce porosity in most masonry products such as concrete, plaster and plaster.
- Sodium silicate is used as alum coagulant and iron flocculant in wastewater treatment plants.
- It is used in detergent auxiliaries such as complex sodium disilicate and modified sodium disilicate. The detergent granules get their strength from a silicate coating.
- It is a useful binder for solids such as water glass, vermiculite and perlite. When blended with lightweight aggregates, water glass can be used to make rigid, high-temperature insulation boards used for high-temperature insulation such as refractories, passive fire protection and molded pipe insulation applications.
- Sand is used as a binder when sand casting of iron or steel.
- Sodium silicate solution is used as a fixative in hand dyeing with reactive dyes that require high pH to react with textile fiber.
- Sodium silicate is used together with magnesium silicate in muffler repair and refitting paste.
- Sodium silicate is also used today as an exhaust system joint and crack sealant to repair mufflers, resonators, tailpipes, and other exhaust components with and without fiberglass reinforcement tapes.
- A mixture of sodium silicate and sawdust is used between the double walls of some safes to make them fire resistant.
- Sodium silicate with additives was injected into the ground to harden the ground and thus prevent further leakage of highly radioactive water from the Fukushima Daiichi nuclear power plant in Japan in April 2011.
- Sodium silicate is used as a deflocculant in casting plugs, helping to reduce the viscosity and the need for large amounts of water to liquefy the clay body.
- Sodium silicate and other silicates are the main ingredients in “instant” wrinkle creams that temporarily tighten skin to minimize the appearance of wrinkles and under-eye bags. This is not a permanent effect.
- Sodium silicate was used as an egg preservative when cooling was not available. Fresh eggs are dipped in a solution of sodium silicate (water glass).
- The sodium silicate flocculant properties are also used to clarify wine and beer by precipitating colloidal particles.
- Sodium silicate gel is also used as a substrate for algae growth in aquaculture hatcheries.
What is the Sodium Silicate Sales Price?
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Where Can I Buy Sodium Silicate?
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