A production process and device for producing ionic membrane caustic soda using well mine salt

Abstract

The invention belongs to the technical field of caustic soda, and provides a production process for producing ion membrane caustic soda by a well and rock salt, wherein the production process includesthe following steps: dissolving the well and rock salt in water to obtain a saturated NaCl solution; then removing Ca<2+>, Mg<2+> and SiO2 in the saturated NaCl solution, to obtain refined saline water; and finally, electrolyzing the refined saline water, to obtain caustic soda, Cl2 and H2. Provided is a device for producing ion membrane caustic soda by the well and rock salt, wherein the deviceincludes a salt dissolving device, a front reaction tank, a pressurized dissolved gas tank, a preprocessor, a rear reaction tank, a filter, a refined saline water storage tank and an electrolytic bathwhich are connected successively, and the technical problems in the prior art that sea salt resources are in short supply, energy consumption for preparing caustic soda from the sea salt is high andthe utilization rate of equipment is low are solved.

Description

technical field [0001] The invention belongs to the technical field of caustic soda, and relates to a production process and a device for producing ionic membrane caustic soda by using well mine salt. Background technique [0002] Caustic soda is an important chemical raw material. In the existing industry, sea salt is basically dissolved to make saturated brine, and the saturated brine is removed by electrolysis to prepare caustic soda. Due to the increasing amount of sea salt mining, when there is a tsunami and other shipwrecks When it happens, sea salt will become a very scarce resource, and the use of sea salt to prepare caustic soda requires high energy consumption and low equipment utilization. Therefore, there is an urgent need for a resource that can replace sea salt as a raw material for preparing caustic soda. Contents of the invention [0003] The invention proposes a production process and device for producing ionic membrane caustic soda by using well mine salt...

AI Technical Summary

Problems solved by technology

[0002] Caustic soda is an important chemical raw material. In the existing industry, sea salt is basically dissolved to make saturated brine, and the saturated brine is removed by electrolysis to prepare caustic soda. Due to the increasing amount of sea salt mining, when there is a tsunami and other shipwrecks When it happens, sea salt will become a very scarce resource, and the use of sea salt to prepare caustic soda requires high energy consumption and low equipment utilization. Therefore, there is an urgent need for a resource that can replace sea salt as a raw material for preparing caustic soda

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