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Caustic Soda
Addtime:2010-12-29Source:KingBoard 【Fonts:Large Medium Small

Caustic Soda
Formula: NAOH
Application
Caustic Soda is an important element for inorganic materials. Widely used in light industry as well as chemical, textile, medicine, metallurgy and electronic industries.
Main Model:
Diaphragmatic method: 30% alkaline solution, 96% alkaline flake.
Ion-exchange membrane method: 30% alkaline solution, 32% alkaline solution, 50% alkaline solution and 99% alkaline flake.
Sodium Hydroxide Standards:
1. Requirements of industrial solid sodium hydroxide (including alkaline flake)(GB209-93)

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Diaphragmatic Method

Best

Fine

Pass

Sodium Hydroxide%≥

96.0

96.0

95.0

Sodium Sulphate%≤

1.3

1.4

1.6

Sodium Chloride%≤

2.7

2.8

3.2

Iron Oxide%≤

0.008

0.01

0.02

Note: Comparative figures are listed in the table above.
2. Requirements of industrial liquefied sodium hydroxide:

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Diaphragmatic Method

Model I

Model II

Best

Fine

Pass

Fine

Pass

Sodium Hydroxide%≥

42.0

42.0

42.0

30.0

30.0

Sodium Sulphate%≤

0.3

0.4

0.6

0.4

0.6

Sodium Chloride %≤

1.6

1.8

2.0

4.7

5.0

Iron Oxide %≤

0.004

0.007

0.01

0.005

0.01

Note: Comparative figures are listed in the table above.

3. Requirements of ionized sodium hydroxide: (GB/T11199-89)

Level of Products Level

First Grade

Pass

Method of Testing

Index

Model I

Model I

Model I

Model II

Name of Index

NaOH≥

32.0

32.0

28.0

32.0

28.0

GB11213-1 (A)

Na2CO3≤

0.04

0.06

0.06

0.06

0.06

GB4348-1 (B)

NaCL≤

0.004

0.007

0.007

0.01

0.01

GB7698

Fe2O3≤

0.0003

0.0005

0.0005

0.0005

0.0005

GB11213-2

NaCLO3≤

0.001

0.002

0.002

0.002

0.002

GB4348-3

CaO≤

0.0001

0.0005

0.0005

0.001

0.001

GB11200-1

Al2O3≤

0.0004

0.0006

0.0006

0.001

0.001

GB11200-8

SiO2≤

0.0015

0.002

0.002

0.004

0.004

GB11200-2

Na2SO4≤

0.001

0.002

0.002

0.002

0.002

GB11213-4
GB11213-6

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