Sodium Aluminate

Sodium Aluminate
Sodium Aluminate
Are common
Systematic ; name	Sodium Aluminate
Traditional names	Sodium Metaaluminate
Chem. formula	NaAlO 2
Physical properties
Molar mass	81.97 g / mol
Density	2.693 g / cm³
Thermal properties
T. melt.	1800; 1650 ° C
Classification
Reg. CAS number	1302-42-7
PubChem
Reg. EINECS number
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Sodium aluminate is an inorganic compound, a complex oxide of sodium and aluminum with the formula NaAlO ₂ , a white amorphous substance that reacts with water.

Content

Getting

Alumina fusion with sodium oxide :

{\mathsf {Na_{2}O+Al_{2}O_{3}\ {\xrightarrow {1200^{o}C}}\ 2NaAlO_{2}}}

{\ displaystyle {\ mathsf {Na_ {2} O + Al_ {2} O_ {3} \ {\ xrightarrow {1200 ^ {o} C}} \ 2NaAlO_ {2}}}}

with its hydroxide :

{\mathsf {2NaOH+Al_{2}O_{3}\ {\xrightarrow {900^{o}C}}\ 2NaAlO_{2}+H_{2}O}}

{\ displaystyle {\ mathsf {2NaOH + Al_ {2} O_ {3} \ {\ xrightarrow {900 ^ {o} C}} \ 2NaAlO_ {2} + H_ {2} O}}}

or carbonate :

{\mathsf {Na_{2}CO_{3}+Al_{2}O_{3}\ {\xrightarrow {1000^{o}C}}\ 2NaAlO_{2}+CO_{2}}}

{\ displaystyle {\ mathsf {Na_ {2} CO_ {3} + Al_ {2} O_ {3} \ {\ xrightarrow {1000 ^ {o} C}} \ 2NaAlO_ {2} + CO_ {2}}}}

Dissolution of aluminum in molten sodium hydroxide :

{\mathsf {2(NaOH\cdot H_{2}O)+2Al\ {\xrightarrow {400^{o}C}}\ 2NaAlO_{2}+3H_{2}}}

{\ displaystyle {\ mathsf {2 (NaOH \ cdot H_ {2} O) + 2Al \ {\ xrightarrow {400 ^ {o} C}} \ 2NaAlO_ {2} + 3H_ {2}}}}

Sodium tetrahydroxoaluminate dehydration:

{\mathsf {Na[Al(OH)_{4}]\ {\xrightarrow {800^{o}C}}\ NaAlO_{2}+2H_{2}O}}

{\ displaystyle {\ mathsf {Na [Al (OH) _ {4}] \ {\ xrightarrow {800 ^ {o} C}} \ NaAlO_ {2} + 2H_ {2} O}}}

Physical Properties

Sodium aluminate forms white crystals of rhombic syngony , cell parameters a = 0.537 nm, b = 0.521 nm, c = 0.707 nm, Z = 4.

Chemical Properties

Reacts with water (with hot faster):

{\mathsf {NaAlO_{2}+2H_{2}O\ {\xrightarrow {\ }}\ NaOH+Al(OH)_{3}\downarrow }}

{\ displaystyle {\ mathsf {NaAlO_ {2} + 2H_ {2} O \ {\ xrightarrow {\}} \ NaOH + Al (OH) _ {3} \ downarrow}}}

In an alkaline environment with water forms sodium tetrahydroxoaluminate :

{\mathsf {NaAlO_{2}+2H_{2}O\ {\xrightarrow {OH^{-}}}\ Na[Al(OH)_{4}]}}

{\ displaystyle {\ mathsf {NaAlO_ {2} + 2H_ {2} O \ {\ xrightarrow {OH ^ {-}}} \ Na [Al (OH) _ {4}]}}}

Decomposed by acids:

{\mathsf {NaAlO_{2}+4HCl\ {\xrightarrow {\ }}\ NaCl+AlCl_{3}+2H_{2}O}}

{\ displaystyle {\ mathsf {NaAlO_ {2} + 4HCl \ {\ xrightarrow {\}} \ NaCl + AlCl_ {3} + 2H_ {2} O}}}

Application

Product in alumina production.
Pickling for dyeing fabrics.
Production of industrial catalysts.

Literature

Lidin R.A. and other Chemical properties of inorganic substances: Textbook. manual for universities. - 3rd ed., Rev. - M .: Chemistry, 2000 .-- 480 p. - ISBN 5-7245-1163-0 .
Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1988. - T. 1. - 623 p.
Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1971. - T. 1. - 561 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.

Sodium Aluminate

Are common
Systematic name	Sodium Aluminate
Traditional names	Sodium Metaaluminate
Chem. formula	NaAlO ₂
Physical properties
Molar mass	81.97 g / mol
Density	2.693 g / cm³
Thermal properties
T. melt.	1800; 1650 ° C
Classification
Reg. CAS number	1302-42-7
PubChem
Reg. EINECS number
Smiles
Inchi
ChemSpider