Etibor-68 - Eti Maden İşletmeleri

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. 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
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Etimine S.A.
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