64 results about "Technetium stannous pyrophosphate" patented technology

The present invention relates to an oral care composition with a high water content which has improved robustness towards microbial challenge. The oral care composition includes compositions comprising from 0.125 wt % to 0.75 wt % of a water soluble source of stannous ions, wherein the composition comprises at least 50 wt % water and wherein the source of stannous ions is selected from the group consisting of stannous chloride, stannous pyrophosphate, stannous formate, stannous acetate, stannous gluconate, stannous lactate, stannous tartrate, stannous oxalate, stannous malonate, stannous citrate, stannous ethylene glyoxide, and mixtures thereof.

The invention discloses a recycling treatment method for stannous pyrophosphate waste slag. The recycling treatment method comprises the following steps: (1) adding concentrated acid into the stannous pyrophosphate waste slag to be dissolved; filtering to obtain a filtering solution for later use; (2) heating alkali liquid to 70-90 DEG C and dripping the filtering solution until the pH is 2-4 under an agitating state and preserving the heat to react for 30-60 minutes to obtain a mixed solution; (3) centrifuging and drying the mixed solution; and washing and drying in vacuum to obtain a stannous pyrophosphate product. The invention provides the recycling treatment method for the stannous pyrophosphate waste slag so that the produced waste slag is reused and the waste of resources is reduced; a tin metal resource is recycled, the utilization rate of the resource is improved and the direct yield of the product is improved.

The invention relates to a method for preparing high-purity stannous pyrophosphate. The method comprises the following steps of using water with air removed to respectively dissolve soluble stannous salt and soluble pyrophosphate, vacuumizing to remove air in solution and a reactor, controlling the temperature to be between 50 and 80 DEG C, and under stirring, mixing the two kinds of raw material solution to react; then sealing the reactor, cooling the reactant to room temperature, filtering the reactant, washing the deposit, and centrifuging the deposit to dry the deposit; and adding the deposit into water to disperse the deposit, pumping the air, controlling the temperature to be between 50 and 80 DEG C, stirring, washing, cooling the reactant to room temperature, filtering andcentrifuging the deposit to dry the deposit, and drying the deposit in vacuum to obtain a high-purity white powered stannous pyrophosphate product. The stannous pyrophosphate content in the stannous pyrophosphate product is greater than 99 percent. The stannous pyrophosphate prepared by the method is high in purity, large in crystalline grains and easy to wash. The method is simple and convenient to popularize and use.

The invention provides a negative electrode active material and a preparation method thereof. The negative electrode active material comprises stannous pyrophosphate, and tin and carbon which are positioned on the surface of the stannous pyrophosphate. The negative electrode active material prepared by the method can be used for obviously improving the reversible specific capacity of a battery, has high efficiency of serving as the negative electrode active material of the battery for the first time and has a stable structure, high heat stability and high cycling stability, and the tap density of the material is obviously improved. The negative electrode active material prepared by the method is in an amorphous state; the volume change is little in a lithium embedding process; the quality specific capacity can reach twice of the theory specific capacity of the existing commercial graphite. The negative electrode active material is simple, easily available, easy to prepare, low in cost and easy to apply commercially, and establishes a basis for the development of lithium ion batteries.