Scandium chloride is an inorganic compound with the chemical formula ScCl3, which is an off-white solid at room temperature and pressure. It is soluble in water and insoluble in anhydrous ethanol. When crystallized from aqueous solution, it is obtained as hexahydrate (when heated, it partially dehydrogenates to produce insoluble scandium oxychloride).

Scandium chloride is an inorganic compound with the chemical formula ScCl3, and it is an off-white solid at normal temperature and pressure. Soluble in water, difficult to dissolve in absolute ethanol. When crystallized from an aqueous solution, hexahydrate (partially dehydrochlorinated to form insoluble scandium oxychloride when heated)

Scandium chloride can be used to make high melting point alloys. It has been reported to prepare scandium master alloys by doping, scandium fluoride or scandium oxide metallothermic reduction and molten salt electrolysis. The doping method is prepared by mixing metal scandium into aluminum alloy. Metal scandium is expensive, and the burning loss is large during the smelting process, and the cost of the master alloy is high; the scandium fluoride metallothermal reduction method uses corrosion in the preparation of scandium fluoride. And toxic hydrogen chloride, the metallothermic reduction temperature is also very high; scandium oxide metallothermic reduction method scandium yield rate is not high, molten salt electrolysis device complex, conversion rate is not high.

Use

Scientific research reagents, biochemical research

Scandium chloride can be used to make high melting point alloys. It has been reported to prepare scandium master alloys by doping, scandium fluoride or scandium oxide metallothermic reduction and molten salt electrolysis. The doping method is prepared by mixing scandium metal into aluminum alloy. The metal scandium is expensive, the burning loss is large during the smelting process, and the cost of the master alloy is high; the scandium fluoride metallothermic reduction method uses corrosion and Toxic hydrogen chloride has a very high metallothermal reduction temperature; scandium oxide metallothermal reduction method has a low yield of scandium, and the molten salt electrolysis method has complicated devices and low conversion rate.

Application

1. Preparation of aluminum-magnesium-scandium master alloy by thermal reduction of anhydrous scandium chloride by aluminum-magnesium: the small-scale test and the expanded test have achieved good indicators, and the process conditions for the preparation of aluminum-magnesium-scandium master alloy have been basically determined, which has laid a solid foundation for the semi-industrial test. Base. The small-scale test shows that the suitable scandium content of the anhydrous scandium chloride molten salt is 8% during the stirring test with 500g of argon gas; the suitable stirring intensity is 4 to 6 times; the suitable time for reducing the anhydrous scandium chloride by aluminum magnesium scandium is 20min; three comprehensive condition tests, the average content of scandium in ingots is 1.76% to 1.81%, and the yield of scandium is 88% to 90.5%; the expanded test of aluminum-magnesium-scandium master alloys shows that the yield of scandium in the test with 500g of argon gas stirring The rate is 78.0% to 79.0%; the scandium yield reaches 90.0% to 90.3% when a 2kg-grade molten salt bell jar is pressed in and argon is stirred; the 4kg molten salt bell jar is pressed into and stirred with argon During the test, the scandium yield was 89.2% to 90.0%. 

2. Aluminum-scandium alloy: a method for producing high-purity aluminum-scandium alloy by electrolysis, which is characterized in that scandium chloride or scandium fluoride is added to the electrolyte of three-layer liquid electrolysis to directly electrolyze high-purity aluminum-scandium alloy, and the electrolyte uses fluorine and chlorine compounds or pure fluorides.