Method for recovering phytate from tungsten mineral leaching solution

• Main Authors: LIU XUHENG, ZHAO ZHONGWEI, ZHU XINRUI, LUO BIYUN, CHEN XINGYU
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2019
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; ORGANIC CHEMISTRY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for recovering phytate from tungsten mineral leaching solution. The method comprises the following steps: (1) adjusting pH value of the tungsten mineral leaching solution to 3-6 by using inorganic acid; (2) extracting the tungsten mineral leaching solution in the step (1) by using an organic phase containing tributyl phosphate, transferring phytate in the tungstenmineral leaching solution to an organic phase in the form of phytic acid molecules, and using tungsten left in a water phase for preparing ammonium paratungstate; (3) carrying out back extraction on an organic phase containing phytic acid molecules by using a sodium hydroxide solution, and returning obtained sodium phytate solution for decomposing the tungsten minerals. According to the method, recycling of the phytate is achieved; tungsten and the phytate are efficiently separated; subsequent purification and impurity removal process is facilitated; production cost is reduced; and productionefficiency is improved. 本发