SODIUM ALUMINATE POWDER

Synonyms:
SODIUM ALUMINATE POWDER; Aluminate de sodium; Aluminate de sodium; ALUMINATE DE SODIUM ANHYDRE; ALUMINATE DE SODIUM, SOLIDE; ALUMINATE DE SOUDE; METAALUMINATE DE SODIUM; ALUMINATE (AlO2(1-)), SODIUM; ALUMINATE (AlO21-), SODIUM; ALUMINATE, SODIUM; ALUMINUM SODIUM OXIDE; ALUMINUM SODIUM OXIDE (AlNaO2); ANHYDROUS SODIUM ALUMINATE; Sodium aluminate; SODIUM ALUMINATE (Na2Al2O4); SODIUM ALUMINATE (NaAlO2); SODIUM ALUMINATE ANHYDROUS; SODIUM ALUMINATE DIOXIDE; SODIUM ALUMINUM DIOXYDE; Sodium aluminum oxide; SODIUM METAALUMINATE; oxide; sodıum metaalumınate; sodıum-m-alumınate; sodyum alüminat; sodyum alüminate; aluminate de sodium; aluminat de sodium; sodıum alumınate; sodium alumınate; sodium aluminate; SODIUM ALUMINATE POWDER; Aluminate de sodium; Aluminate de sodium; Alumınate De Sodıum Anhydre; Alumınate De Sodıum, Solıde; Alumınate De Soude; Metaalumınate De Sodıum; Alumınate (Alo2(1-)), Sodıum; Alumınate (Alo21-), Sodıum; Alumınate, Sodıum; Alumınum Sodıum Oxıde; Alumınum Sodıum Oxıde (Alnao2); Anhydrous Sodıum Alumınate; Sodium Aluminate; Sodıum Alumınate (Na2al2o4); Sodıum Alumınate (Naalo2); Sodıum Alumınate Anhydrous; Sodıum Alumınate Dıoxıde; Sodıum Alumınum Dıoxyde; Sodium Aluminum Oxide; Sodıum Metaalumınate; Sodıum-M-Alumınate; Sodyum Alüminat; Sodyum Alüminate; Aluminate De Sodium; Aluminat De Sodium; Sodıum Alumınate; Sodium Alumınate; Sodium Aluminate; SODIUM-M-ALUMINATE; sodyum alüminat; sodyum alüminate; Aluminate de sodium; Aluminat de sodium; SODIUM ALUMINATE; SODİUM ALUMINATE; SODİUM ALUMİNATE; SODIUM ALUMINATE POWDER; Aluminate de sodium; Aluminate de sodium; ALUMINATE DE SODIUM ANHYDRE; ALUMINATE DE SODIUM, SOLIDE; ALUMINATE DE SOUDE; METAALUMINATE DE SODIUM; ALUMINATE (AlO2(1-)), SODIUM; ALUMINATE (AlO21-), SODIUM; ALUMINATE, SODIUM; ALUMINUM SODIUM OXIDE; ALUMINUM SODIUM OXIDE (AlNaO2); ANHYDROUS SODIUM ALUMINATE; Sodium aluminate; SODIUM ALUMINATE (Na2Al2O4); SODIUM ALUMINATE (NaAlO2); SODIUM ALUMINATE ANHYDROUS; SODIUM ALUMINATE DIOXIDE; SODIUM ALUMINUM DIOXYDE; Sodium aluminum oxide; SODIUM METAALUMINATE; SODIUM-M-ALUMINATE; sodyum alüminat; sodyum alüminate; Aluminate de sodium; Aluminat de sodium; SODIUM ALUMINATE; SODİUM ALUMINATE; SODİUM ALUMİNATE; sodıum alumınate powder; aluminate de sodium; aluminate de sodium; alumınate de sodıum anhydre; alumınate de sodıum, solıde; alumınate de soude; metaalumınate de sodıum; alumınate (alo2(1-)), sodıum; alumınate (alo21-), sodıum; alumınate, sodıum; alumınum sodıum oxıde; alumınum sodıum oxıde (alnao2); anhydrous sodıum alumınate; sodium aluminate; sodıum alumınate (na2al2o4); sodıum alumınate (naalo2); sodıum alumınate anhydrous; sodıum alumınate dıoxıde; sodıum alumınum dıoxyde; sodium aluminum oxide; sodıum metaalumınate; sodıum-m-alumınate; sodyum alüminat; sodyum alüminate; aluminate de sodium; aluminat de sodium; sodıum alumınate; sodium alumınate; sodium aluminate; SODIUM ALUMINATE POWDER; Aluminate de sodium; Aluminate de sodium; Alumınate De Sodıum Anhydre; Alumınate De Sodıum, Solıde; Alumınate De Soude; Metaalumınate De Sodıum; Alumınate (Alo2(1-)), Sodıum; Alumınate (Alo21-), Sodıum; Alumınate, Sodıum; Alumınum Sodıum Oxıde; Alumınum Sodıum Oxıde (Alnao2); Anhydrous Sodıum Alumınate; Sodium Aluminate; Sodıum Alumınate (Na2al2o4); Sodıum Alumınate (Naalo2); Sodıum Alumınate Anhydrous; Sodıum Alumınate Dıoxıde; Sodıum Alumınum Dıoxyde; Sodium Aluminum Oxide; Sodıum Metaalumınate; Sodıum-M-Alumınate; Sodyum Alüminat; Sodyum Alüminate; Aluminate De Sodium; Aluminat De Sodium; Sodıum Alumınate; Sodium Alumınate; Sodium Aluminate; Sodyum alumünat; sodyum aluminat
 

SODIUM ALUMINATE POWDER
Sodium aluminate

Sodium aluminate
Sodium metaaluminate sample
Names
Other names
Sodium aluminum oxide, aluminate
meta-
sodium aluminate ((AlO 2) 1−), sodium
Identifiers
Sodium Aluminate CAS Number
1302-42-7 ☑
3D model (JSmol)
Interactive image
ECHA Info Card 100.013.728
Sodium Aluminate EC Number
215-100-1
Sodium Aluminate PubChem CID
14766
UNII
2VMT26903W ☑
CompTox Dashboard (EPA)
DTXSID3051206
InChI [show]
Smiles [show]
Properties of sodium aluminate
Chemical formula of sodium aluminate NaAlO 2
Molar mass of sodium aluminate 81.97 g / mol
Appearance of sodium aluminate white powder (sometimes slightly yellowish)
hygroscopic / when dissolved in water, a colloidal black solution is formed
Odorless sodium aluminate
Density of sodium aluminate 1.5 g / cm 3
Melting point of sodium aluminate 1,650 ° C (3,000 ° F; 1,920 K)
solubility of sodium aluminate in water very soluble
Solubility of sodium aluminate Insoluble in alcohol [1]
Sodium Aluminate Refractive Index (n D) 1.566
Structure of Sodium Aluminate
Crystal structure of orthorhombic sodium aluminate
Thermochemistry of Sodium Aluminate
Heat capacity of sodium aluminate (C) 73.6 J / mol K

Sodium aluminate is an inorganic chemical of great industrial importance. It constitutes a source of aluminum hydroxide used in a large number of technical applications. In anhydrous form, it is a white crystalline solid, a mixed oxide of sodium and aluminum, with the chemical formula NaAlO2, Na2O · Al2O3, or Na2Al2O4.
Sodium aluminate is produced industrially by dissolving aluminum hydroxide in a sodium hydroxide solution (NaOH). Aluminum hydroxide (gibbsite) is dissolved in a 25% aqueous NaOH solution at a temperature close to the boiling point. The use of a more concentrated soda solution results in a semi-solid product. The process should be carried out in a nickel or steel vessel, and the solution containing the aluminum hydroxide should be kept at the boil until a pasty product is formed. The mixture is then cooled, which leads to the formation of a solid containing about 70% of NaAlO2. This solid is ground, then the powder is dehydrated in a rotary oven. The final product contains about 90% NaAlO2, as well as traces (~ 1%) of water and NaOH.
In water treatment applications, sodium aluminate is used as an additive for water softeners, as a coagulating agent to aid flocculation, and to remove dissolved silica. In the construction sector, it is used to accelerate the solidification of concrete, mainly in the event of frost. It is also used in the paper industry, for the manufacture of refractory bricks, the production of alumina (...).
Safety of Sodium Aluminate
Sodium aluminate is very soluble in water, the solution formed being a strong base which reacts violently with acids. The precautionary advice during use is therefore that of a corrosive product.
Use and emission sources of sodium aluminate
Softening agent for water treatment, dye mordant

Sodium aluminate std molar entropy (S o 298) 70.4 J / mol K
Enthalpy of
std formation (Δ f H ⦵ 298) -1133.2 kJ / mol
Unless otherwise stated, data is given for materials in their standard state (at 25 ° C [77 ° F], 100 kPa).
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Infobox references
Sodium aluminate is an inorganic chemical used as an efficient source of aluminum hydroxide for many industrial and technical applications. Pure sodium aluminate (anhydrous) is a white crystalline solid having a formula variously given as NaAlO 2, NaAl (OH) 4 (hydrate), [2] Na 2 O. Al 2 O 3 or Na 2 Al 2 O 4 . Commercial sodium aluminate is available as a solution or as a solid.
Other related compounds, sometimes called sodium aluminate, prepared by the reaction of Na 2 O and Al 2 O 3 are Na 5 AlO 4 which contains discrete anions AlO 4 5−, Na 7 Al 3 O 8 and Na 17 Al 5 O 16 which contain complex polymeric anions and NaAl 11 O 17, which was mistakenly believed to be β-alumina, an aluminum oxide phase. [3] [4]

Structure of Sodium Aluminate
Anhydrous sodium aluminate, NaAlO 2, contains a three-dimensional backbone of AlO 4 tetrahedra bonded at the corners. The hydrated form NaAlO 2 · 5 / 4H 2 O has layers of AlO 4 tetrahedra joined in rings and the layers are held together by sodium ions and water molecules which bind to O atoms in AlO 4 tetrahedra. [5]

Manufacture of sodium aluminate
Sodium aluminate is made by dissolving aluminum hydroxide in a solution of caustic soda (NaOH). Aluminum hydroxide (gibbsite) can be dissolved in 20–25% aqueous NaOH solution at a temperature near the boiling point. The use of more concentrated NaOH solutions results in a semi-solid product. The process should be carried out in steamed vessels made of nickel or steel, and aluminum hydroxide should be boiled with about 50% aqueous caustic soda until a paste is formed. The final mixture should be poured into a tank and cooled; a solid mass containing approximately 70% of NaAlO 2 then forms. After being ground, this product is dehydrated in a rotary kiln. The resulting product contains 90% NaAlO 2 and 1% water, as well as 1% free NaOH.

The reaction of alkali metal and aluminum
Sodium aluminate is also formed by the action of sodium hydroxide on elemental aluminum which is an amphoteric metal. The reaction is highly exothermic once established and is accompanied by rapid evolution of hydrogen gas. The reaction is sometimes written:

2Al + 2NaOH + 2H 2 O → 2NaAlO 2 + 3H 2
however, the species produced in solution is likely to contain the [Al (OH) 4] - or possibly the [Al (H 2 O) 2 (OH) 4] - ion. [6]

Uses
In water treatment, it is used as a supplement to water softening systems, as a coagulant aid to improve flocculation and to remove dissolved silica and phosphates.

In construction technology, sodium aluminate is used to accelerate the solidification of concrete, mainly when working during freezing.

Sodium aluminate is also used in the paper industry, for the production of refractory bricks, the production of alumina, etc.

Sodium aluminate solutions are intermediates in the production of zeolites. [7]

Properties of Sodium Aluminate
Related categories Aluminates, Aluminum, Aluminum catalysts, Catalysis and inorganic chemistry, Ceramics,
Ceramics by element, chemical synthesis, materials science, science of metals and ceramics, sodium
Less...
Quality level 100
technical grade
form powder
anhydrous quality
impurities ≤0.05% Fe (as Fe2O3)
traces of Al cation (Al2O3): 50-56%
  Na (as Na2O): 37-45%
reactivity type of reagent: catalyst
SMILES string [Na +]. O = [Al -] = O
InChI 1S / Al.Na.2O / q-1; +1 ;;
InChI key IYJYQHRNMMNLRH-UHFFFAOYSA-N
Show fewer properties
The description
Application
Used in the isomerization of alkenes; isomerization of amines; a form of metallic sodium with a large specific surface area.

Sodium aluminate is an inorganic chemical of great industrial importance. It constitutes a source of aluminum hydroxide used in a large number of technical applications. In anhydrous form, it is a white crystalline solid, a mixed oxide of sodium and aluminum, with the chemical formula NaAlO2, Na2O · Al2O3, or Na2Al2O4.

Sodium aluminate is produced industrially by dissolving aluminum hydroxide in a sodium hydroxide solution (NaOH). Aluminum hydroxide (gibbsite) is dissolved in 25% aqueous NaOH solution at a temperature close to the boiling point. The use of a more concentrated soda solution results in a semi-solid product. The process should be carried out in a nickel or steel vessel, and the solution containing the aluminum hydroxide should be kept at the boil until a pasty product is formed. The mixture is then cooled, which leads to the formation of a solid containing approximately 70% of NaAlO2. This solid is ground, then the powder is dehydrated in a rotary oven. The final product contains about 90% NaAlO2, as well as traces (~ 1%) of water and NaOH.

In water treatment applications, sodium aluminate is used as an additive for water softeners, as a coagulating agent to aid flocculation, and to remove dissolved silica. In the construction sector, it is used to accelerate the solidification of concrete, mainly in the event of frost. It is also used in the paper industry, for the manufacture of refractory bricks, the production of alumina (...).

Safety of Sodium Aluminate
Sodium aluminate is very soluble in water, the solution formed being a strong base which reacts violently with acids. The precautionary advice during use is therefore that of a corrosive product.

Use and emission sources of sodium aluminate
Softening agent for water treatment, dye mordant

sodium aluminate sodium aluminate
The sodium aluminate has an Al2O3 titre of 23%. In terms of quality, sodium aluminate complies with the EN882 standard for water treatment.
Applications of sodium aluminate:

Coagulation in water treatment
Stationery applications
Concrete industry
Pharmaceutical industry
PH regulation

The sodium aluminate solution is an aqueous solution of the white crystalline powder. Corrosive to metals and fabrics.