DEHYBOR

Dehybor

Reducing energy consumption

This hard, glassy, granular product is excellent when forming flux or glass, where it helps to increase yield and reduce energy consumption.
Dehybor in Metallurgy

Energy Efficiency and Increased Yields with Boron

Dehybor® results from the dehydration and fusion of borax. It is an excellent flux and glass former. Using Dehybor can help to increase yields, and reduce energy consumptionin glass, ceramic, and enamel frit production.

As a result, Dehybor is a popular choice for use in manufacturing borosilicate and other glasses, glazes, and enamels. It’s also a useful ingredient in cleaning products. And more recently, it has found a place in energy production, thanks to its crosslinking abilities.

APPLICATIONS AND BENEFITS

Borosilicate glass

Dehybor is a source of B2O3 in the manufacture of many types of borosilicate glass:
  • Heat and chemical-resistant glasses
  • Illumination glasses
  • Optical lenses
  • Medical and cosmetic containers
  • Hollow microspheres
  • Glass beads

For this purpose, Dehybor has advantages over 5 and 10 mol borax: Dehybor has a higher bulk density and melts more rapidly, even with minimum energy. Dehybor is also a source of sodium and can be used with boric acid or 20 Mule Team® boric oxide to control the sodium oxide/boric oxide ratio in the glass. To formulate glasses with low thermal expansion (high thermal shock resistance) and good chemical durability, the productacts as both a flux and network former.

Ceramic enamel

Dehybor is also used in the production of glasses and enamels, which provide decorative and protective coatings for ceramics (eg, wall and floor tiles, tableware, porcelain) and metals (eg, plumbing fixtures, cookware, appliances). As with borosilicate glass, the product allows the formulation of low-melting glazes and enamels with the correct thermal expansion. In enamels, this borate also improves adhesion to metal by dissolving iron oxide and reducing the melt surface tension.

Metallic oxide solvent

Speaking of metal, Dehybor is an excellent solvent for metallic oxides at high temperatures. Dehybor can serve as a cover flux to protect metal surfaces from air oxidation, and it serves as a scavenger to dissolve metallic oxides and other contaminants in the production of ferrous and non-ferrous metals.

Refactories

Borate compounds like Dehybor are used as stabilizers and bonding agents in firebricks and castables. The product provides an intermediate-temperature glassy bond prior to the establishment of the ceramic bond (at which point the borate compound is frequently volatilized from the system).

And, more

Dehybor is used in the formulation of slow-dissolving cleaning briquettes, based on gelled or solidified borate suspensions. In toilet bowl cleaners, for example, the slow release of borate softens water to prevent scale buildup, while also deodorizing and inhibiting stain formation.

And, Dehybor’s crosslinking powers are valued in the oil industry, where high-viscosity oil-well fluids that result from the reaction between Dehybor and polymers are used to increase the recovery of oil from subterranean formations.

FACT

Oil recovery operation using Dehybor

As part of high-viscosity oil-well fluids, Dehybor is an important tool for oil recovery.

 

Dehybor APPLICATIONS
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In glass manufacturing, Dehybor has no water of crystallization to dispel in the furnace. Dehybor is a concentrated source of boric oxide, so manufacturers can often improve productivity and reduce handling and freight costs.

TECHNICAL DETAILS

Available Grades

  • 12-Mesh
  • 30-Mesh
  • Fine
  • Extra Fine (Milled)

This hard, glassy, granular material gradually absorbs water under ambient storage conditions, so care should be taken to prevent exposure to humid air and moisture. In aqueous solution, it can provide a slow release of boron.

Dehybor anhydrous borax is available in a 12-, 30-, or 80-mesh grade. Dehybor 12-Mesh and 30-Mesh meet the No. 12 and No. 30 US sieve specifications (< 0.1 % retained), with a mesh size of 1.7 mm and 0.600 mm, respectively.

The melting point is 742°C (1368°F), and the reaction of Dehybor with water is exothermic.

 

TECHNICAL DETAILS
Chemical and Physical Properties

Molecular weight: 201.22

Specific gravity: 2.37

Appearance: Free-flowing, colorless, glassy

Stability: Dehybor is a stable, fused borate product that does not change chemically under normal storage conditions. If wetted, it reacts exothermically, forming hydrated sodium borates. When storing the product, avoid exposure to a humid atmosphere, which might cause caking. Also be sure to maintain the integrity of the packaging.

Bulk density: 67 lb/ft3 (1,074 kg/m3)

Angle of repose: 35°

Chemical Composition (Theoretical)

Boric oxide, B2O3: 61.20%

Sodium oxide, Na2O: 30.80%

Containers: Products may be available in bulk, IBCs, or small bags

Dehybor in Action 

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U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 500 customers with more than 1,700 delivery locations globally. We supply 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles east of Los Angeles.  Learn more about Rio Tinto

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