1. Product Data Sheet ETİ MADEN İŞLETMELERİ Etibor-68 Na2B4O7 – Etibor-68 (Anhydrous Borax) CAS Number: 1330-43-4 Available Packages: 25 kg, 50 kg, 1 ton (with or without pallet) Etibor-68 is obtained by gradually heating of borax at high temperatures. It has white, odorless and crystalline solid structure at the temperature of 20 oC and the pressure of 101.3 kPa. When Na2B4O7 (anhydrous sodium tetraborate) is cooled quickly, it has a glassy amorphous structure. Density of Etibor-68 is 2.36 g/cm3. It has the most stable form at the melting point. The heat of formation was calculated as -3290 kJ/mole. Vapor pressure of Etibor-68 is 0.73 kPa, 73 kPa and 3.39 kPa at 1200oC, 1250oC and 1300oC, respectively. Anhydrous borax dissolves more slowly in water and gives higher heat than the other hydrated borax. The heat of hydration is 161 kJ/mol. In an oxygen-free environment, B4C3 and Na2C2 are formed via reaction of anhydrous borax with carbon at 1200oC. Also, elemental boron is formed by the reaction of anhydrous borax with metallic sodium. Some Applications and Benefits Glass and Ceramics Etibor-68 is used in the production of high quality glass and ceramics. It is used as the source of B2O3 in the manufacture of many types of borosilicate glass. Heat and chemical resistant glass, optical lenses, medical and cosmetic containers and glass beads can be given as an example. Properties, high bulk density and fast melting with less energy, of Etibor-68 are superior when it compared with other borax products (BoraxDecahydrate and Pentahydrate). Etibor-68 increases production and reduces the emission of the oven. Etibor-68 is the source of sodium so it can be used with boric acid and boron oxide to control the ratio of sodium oxide/boron oxide. The aim of using Etibor-68 in glass is providing a stable structure. Because of the detrimental effect of lead Eti Maden İşletmeleri Genel Müdürlüğü Ayvalı Mah. Halil Sezai Erkut Cad. Afra Sok. No:1/A 06010 Etlik-Keçiören ANKARA / TURKEY For more information: Development of Technology Department www.etimaden.gov.tr EYS FRM-ETİ-00 10 /20/1/2014-01 2. compounds on human health, borates which provide same property for glaze (transparency, melting) are preferred to especially tableware nowadays. Boron compounds like anhydrous borax is preferred to production of glaze for this aim. Metallurgy and Casting Etibor-68 is used as a melting agent. Due to the melting property, impurities of metal oxide are dissolved in production of iron-steel and non-ferrous metals by lowering the melting temperature. Removing these impurities from slag is made easier by this property. Etibor-68 is very good solvent for metal oxides at high temperature. The oxidation of metals with air is prevented by covering the surface. Etibor-68 increases the hardness of steel whenever small amounts are added. Properties and processing behaviour of steel materials can be changed by Etibor-68. Detergent and Cleaning Products EtiBor-68 has high amounts of active oxygen. As a result of this, it is preferable in the detergent industry. It provides removal of stains on the laundry by oxidation. Etibor-68 is used in cleaning products (laundry and surface cleaning) and borax powder doped soap. For example, in toilet bowl cleaners, it inhibits stain formation and enables deodorizing property. Refractories Borate compounds are used as bonding agents in firebricks and concretes to create stable structure. Enhanced oil recovery The use of borates in oil industry increases because of being effective cross-linking agents. Etibor-68 is utilized to increase the recovery of oil from subterranean formations. Chemical and Physical Properties It has a white, solid crystal powder form. Specific Gravity Molecular Weight 2.37 g/cm3 (20 oC) 201.22 g/mol Melting Point 741 oC Boiling Point 1575 oC Eti Maden İşletmeleri Genel Müdürlüğü Ayvalı Mah. Halil Sezai Erkut Cad. Afra Sok. No:1/A 06010 Etlik-Keçiören ANKARA / TURKEY For more information: Development of Technology Department www.etimaden.gov.tr EYS FRM-ETİ-00 10 /20/1/2014-01 3. Chemical Content: B2O3 68.00 % min Na2O 30.27 % min. SO4 200 ppm max Cl 105 ppm max Fe 150 ppm max Insoluble in water 920 ppm max Size Distribution: +1,600 mm 1 % max +0,075 mm 5 % max X-Ray Diffraction Analysis: Eti Maden İşletmeleri Genel Müdürlüğü Ayvalı Mah. Halil Sezai Erkut Cad. Afra Sok. No:1/A 06010 Etlik-Keçiören ANKARA / TURKEY For more information: Development of Technology Department www.etimaden.gov.tr EYS FRM-ETİ-00 10 /20/1/2014-01 4. TG/DTA Solubility in Water: Temperature (°C) 0 10 15 20 25 30 40 50 60 70 80 90 100 Etibor-68 % by weight in saturated solution 1.21 1.76 2.22 2.69 3.37 4.02 6.19 9.74 17.01 19.91 23.88 28.98 35.37 Eti Maden İşletmeleri Genel Müdürlüğü Ayvalı Mah. Halil Sezai Erkut Cad. Afra Sok. 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