External circulation type preparation method for sodium perchlorate

Abstract

The present invention belogns to the field of electrolytic technology, and it relates to a method for preparing sodium perchlorate by utilizing external circulating type electrolytic process. The chrome-removed electrolyte can be fed into electrolytic system to make electrolysis. It is characterized by that the electrolyte is introduced into external circulating type electrolytic system to make electrolysis to obtain sodium perchlorate, and its electrolyte external circulation mode is a natural convection circulation or forced circulation. Said invention can implement continuous operation, can prolong life of electrode, raise production capacity and reduce production cost, etc.

Description

technical field [0001] The invention belongs to the technical field of electrolysis, in particular to a method for preparing sodium perchlorate by external circulation electrolysis. Background technique [0002] At present, the production of sodium perchlorate is mostly an open rectangular parallelepiped electrolytic cell, using ceramic matrix lead dioxide as the anode. The electrode is cylindrical, which is easily damaged, has a short service life, and consumes a lot of electrodes; the electrolytic cell structure is loose, difficult to install, has many operation control points (each electrolytic cell is equipped with an independent cooling coil), and occupies a large area; The structure of the electrode group is unreasonable, the maintenance is frequent, the maintenance is difficult, and the maintenance is inconvenient; the electrolysis process relies entirely on the gas agitation generated by the electrolysis to realize the mass transfer process, so there are a lot of dea...

AI Technical Summary

Problems solved by technology

The electrode is cylindrical, which is easily damaged, has a short service life, and consumes a lot of electrodes; the electrolytic cell structure is loose, difficult to install, has many operation control points (each electrolytic cell is equipped with an independent cooling coil), and occupies a large area; The structure of the electrode group is unreasonable, the maintenance is frequent, the maintenance is difficult, and the maintenance is inconvenient; the electrolysis process relies entirely on the gas agitation generated by the electrolysis to realize the mass transfer process, so there are a lot of dead angles, resulting in low current efficiency. Between 30-60%, the power consumption is 3000-5800Kwh / ton of sodium perchlorate; most of the operations are intermittent, cumbersome and labor-intensive, and the control of the end point of electrolysis depends on a large number of chemical analysis and manual short-circuit discharge, human factors It is easy to lead to the end of electrolysis or excessive power consumption will increase, or the quality of the electrolyte will be affected if the end is not reached, and even the quality of the product will be affected.