Preparation method of high-quality low-sodium salt

• Main Authors: LIU XIN, MA YANFANG, ZHANG ZHIHONG, SHI ZHONGLU, YU XUEFENG, HUANG SHOUYAN, XU SHENG, FU ZHENHAI
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; INORGANIC CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention discloses a preparation method of high-quality low-sodium salt. The preparation method comprises the steps that a first raw material, a second raw material and a base solution are provided, the first raw material comprises a sodium potassium saturated solution, the second raw material comprises bischofite ore, and the base solution comprises Na < + >, K < + >, Mg < 2 + >, C1 <-> and H2O; and putting the base solution into a DTB crystallization device, simultaneously introducing the first raw material and the second raw material into the DTB crystallization device at a first feeding rate and a second feeding rate under the condition that the stirring rate is 500-700rpm, intermittently discharging at least 80 minutes later, and then carrying out solid-liquid separation to obtain the high-quality low-sodium salt. The particle size of 96% of the prepared high-quality low-sodium salt is larger than 150 microns, meanwhile, the preparation method is simple and controllable, and accurate control over th