2 results about "Elemental impurities" patented technology

The application relates to a copper-nickel alloy and a preparation method thereof, and relates to the technical field of alloy materials, and mainly adopts the technical scheme that the copper-nickel alloy comprises the following chemical components in percentage by weight: Ni: 10-30 wt%; Fe: 0-1.8 wt%; Mn: 0-1.0 wt%; micro-alloying elements: 0.05-0.2 wt%; impurity elements: <0.5 wt%; and the balance is Cu; wherein the micro-alloying elements comprise noble metal elements. The application mainly utilizes the synergistic effect of the micro-alloying elements in accelerating the anodic and cathodic reactions of the copper-nickel alloy in a corrosive salt solution and promoting non-uniform deposition nucleation, so that the protective property of a corrosion product film on the surface of the copper-nickel alloy is greatly improved, and the copper-nickel alloy has excellent corrosion resistance, and the erosion corrosion rate is reduced by more than 60% compared with that of the existing copper-nickel alloy.

The application discloses a preparation method of carboxymaltose iron and belongs to the pharmaceutical field. The application comprises the following steps: extracting and purifying industrial-grade ferric chloride to obtain a high-purity ferric chloride solution; preparing carboxymaltodextrin through an oxidation reaction of maltodextrin; and performing a complexation reaction on the high-purity ferric chloride solution and the carboxymaltodextrin to obtain carboxymaltose iron. Through the extraction and purification of the industrial-grade ferric chloride, harmful element impurities in the iron source are effectively removed, the final product meets the ICH Q3D injection quality standard, the raw material cost is significantly reduced, the operation is simple, and the application is suitable for industrial production.