Electrolysis of Molten NaCl (Downs Process)

2NaCl → 2Na + Cl2

概述

The Downs process electrolyzes molten NaCl at about 600°C (lowered from 801°C by adding CaCl₂) to produce sodium metal at the cathode and chlorine gas at the anode. A cylindrical iron cathode surrounds a graphite anode, with an iron screen separating products. This is the primary industrial method for producing metallic sodium.

参与者

角色 物质 系数 状态
反应物 Sodium Chloride NaCl 2 (l)
产物 Sodium Na 2 (l)

日常示例

Sodium metal produced by this process is used to make sodium vapor street lights that give a characteristic yellow glow.

工业重要性

唐斯法是生产金属钠的主要工业方法，钠用于有机合成、核反应堆冷却剂（液态钠）及钛和铀等金属的生产。

属性

类型
Electrochemical
可逆
否
能量
吸热
ΔH
822.0 kJ/mol
催化剂
CaCl₂ (melting point depressant)

相关反应

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Electrochemical CO₂ Reduction to CO

Frequently Asked Questions

What is the equation for Electrolysis of Molten NaCl (Downs Process)?
The balanced equation is: 2NaCl → 2Na + Cl₂.
What type of reaction is Electrolysis of Molten NaCl (Downs Process)?
Electrolysis of Molten NaCl (Downs Process) is a electrochemical reaction.
Is Electrolysis of Molten NaCl (Downs Process) exothermic or endothermic?
Electrolysis of Molten NaCl (Downs Process) is endothermic (absorbs energy). The enthalpy change (ΔH) is 822.0 kJ/mol.
What conditions are needed for Electrolysis of Molten NaCl (Downs Process)?
This reaction requires a catalyst (CaCl₂ (melting point depressant)).