Technology for preparing metal sodium with molten electrolysis of sodium hydroxide and electrolytic system of technology

Abstract

The invention discloses a technology for preparing metal sodium with molten electrolysis of sodium hydroxide and an electrolytic system of the technology and belongs to the technical field of molten electrolysis technologies and equipment. By adopting the electrolytic system, under regulation and control of protective gas, the pressures of a fine sodium temporary storage cavity, a fine sodium groove and a fine sodium storage tank keep constant and are changed, and then generation and transferring of fine sodium are finished through heating, thermal insulation and current regulation. By adopting the preparation technology, through an electrochemical method, by utilizing the principle of diaphragm ceramic pipe ion permselectivity, impurities are blocked out of a diaphragm, and thus the purity of a metal sodium product is improved; and in addition, the preparation technology is liable to realize quantity production and low in energy consumption and is simple. The electrolytic system is simple in structure, convenient to install, good in sealing performance and convenient and complete in sodium discharge, can prevent pollution of air and pipeline parts and provides a favorable and stable environment to preparation of the fine sodium.

Description

technical field [0001] The invention relates to a preparation process and a molten electrolysis system of sodium metal, in particular to a process and an electrolysis system for preparing sodium metal by molten electrolysis of sodium hydroxide, belonging to the technical field of molten electrolysis process and equipment. Background technique [0002] Sodium is one of the most widely distributed elements on the earth, and its weight accounts for about 2.83% of the total weight of the earth's crust, ranking sixth. Based on the active chemical properties (such as: reducibility), low melting point, and a series of characteristics such as good thermal conductivity, specific heat capacity, and electrical conductivity of metallic sodium, it has a wide range of applications. It can be used to manufacture secondary energy sodium-sulfur batteries, reduce rare metals from rare metal compounds, coolants in turbocharged engines, coolants for sodium-cooled fast neutron nuclear reactors, ...

AI Technical Summary

Problems solved by technology

[0009] 1. The internal parts of the device need to be sealed. The more parts need to be sealed, the easier it is to cause seal leakage, and at the same time, it will bring in more pollution from the seals, which cannot provide a favorable and stable environment for the preparation of refined sodium;

[0010] 2. No gas protection and valves are installed, adding metal sodium before electrolysis is very easy to pollute the metal sodium, and at the same time, it is not easy to install in the purification device;

[0011] 3. After the production of refined sodium is completed, there will be a large amount of refined sodium remaining in the device and cannot be discharged, resulting in waste and a large potential safety hazard

A large amount of refined sodium accumulates in the diaphragm tube, which is easy to react with the seal, damage the seal, and destroy the tightness

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