33results about How to "Reduce safety and environmental risks" patented technology

The invention discloses a pretreatment method of a lithium iron phosphate positive electrode material for ICP (Inductively Coupled Plasma) test, which comprises the following steps: digesting the lithium iron phosphate positive electrode material and fixing the volume, dispersing the lithium iron phosphate positive electrode material in a dispersion medium before digesting, heating to 430-460 DEG C, carrying out oxidation reaction, and keeping for 1.5-3 hours. Comprising the following steps: S1, ultrasonic dispersion: weighing a lithium iron phosphate positive electrode material, and carrying out ultrasonic dispersion in a dispersion medium for 3-6 minutes to obtain a dispersion; s2, heating to remove carbon: heating the dispersion to generate oxidation reaction to obtain an oxidized sample; s3, acid digestion: mashing the oxidized sample into powder, and adding a digestion reagent until the solid is completely dissolved to obtain a digestion solution; and S4, constant volume: carrying out constant volume on the digestion solution by using pure water. The lithium iron phosphate is heated for 1.5-3 hours in an aerobic environment at the temperature of 430-460 DEG C, so that a carbon coating on the surface of the lithium iron phosphate can be effectively removed, and the content detection result of a main element Li is more accurate; concentrated hydrochloric acid is used for replacing mixed acid for digestion, so that waste gas is greatly reduced, and risks in safety and environmental protection are reduced.