Method for directly using byproduct industrial salt in chlor-alkali industry

• Main Authors: CHEN WEI, XU SHUJIAN, HOU SONGSHAN, ZHANG PEIFENG, XU JIANSHENG, FAN HONGKUI, HAN ZHITAO, HAN GENSHENG
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2023
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; INORGANIC CHEMISTRY; METALLURGY

The invention discloses a method for directly applying byproduct industrial salt to the chlor-alkali industry. The method comprises a high-temperature oxidation treatment method, a total phosphorus removal method and electrolytic solution refining. The high-temperature oxidation treatment method comprises the following steps: blowing air under a high-temperature condition, and carrying out high-temperature oxidation treatment on a byproduct sodium chloride salt, so that organic matters are decomposed or combusted to generate non-toxic gases such as oxycarbide and nitrogen oxide to escape; the total phosphorus removal method comprises the following steps: dissolving a byproduct sodium chloride salt subjected to high-temperature oxidation treatment into a saturated solution, and adding a precipitant to carry out chemical precipitation reaction with phosphate radicals to realize removal of total phosphorus; the electrolytic solution refining mainly comprises two processes, in the first refining process, the bypr