3results about How to "Solve insoluble" patented technology

The invention provides a method for determining the content of precious metal elements in an automobile purification catalyst, and belongs to the technical field of analysis and detection. According to the method, a composite melting system composed of sodium peroxide, anhydrous sodium metaborate and sodium tungstate is constructed, an automobile purification catalyst sample is subjected to efficient melting decomposition, complete leaching of a melt is achieved in combination with a hydrochloric acid and tartaric acid composite acidification system, a tin-tellurium coprecipitation enrichment technology is introduced on the basis, and the purity of the automobile purification catalyst sample is improved. Trace precious metal elements such as platinum, palladium and rhodium are selectively precipitated and effectively enriched, and matrix interference is remarkably reduced; and then adding an indium internal standard solution and carrying out quantitative determination by adopting inductively coupled plasma emission spectrometry, thereby realizing high-sensitivity and high-accuracy analysis of the noble metal element. The method effectively solves the problems of incomplete sample decomposition, low precious metal recovery rate, serious matrix interference, poor detection result stability and the like in the prior art.

The invention relates to the technical field of coatings, and discloses an antibacterial UV-cured copolyester children water cup coating which is prepared from hexa-functionality and bifunctionality aliphatic polyurethane acrylate, isobornyl acrylate, a photoinitiator, a flatting agent and a ternary coordination antibacterial pre-solution. The preparation method comprises the following steps: dispersing zinc dimethacrylate in acetoacetic acid ethyl methacrylate and ethyl acetate, and dropwise adding hydroxyethyl methylacrylate phosphate under a mild condition to react, so as to obtain the zinc-beta-diketone-phosphate ternary coordination system. An indissolvable zinc salt is converted into an organic compatible form by utilizing a synergistic effect of acidolysis and chelation, so that the haze problem caused by poor dispersion of a zinc source is solved; and meanwhile, the Lewis acid catalysis characteristic of the zinc complex is utilized to initiate Michael addition reaction to deeply consume residual monomers. On the basis of ensuring high light transmittance of the coating and excellent adhesive force to a copolyester base material, high-efficiency antibacterial and low-monomer-residue safety are realized.

This invention discloses a water-based cleaning solution comprising: an organic solvent that is poorly soluble in water, a water-soluble co-solvent, a pH adjuster, and water. The organic solvent that is poorly soluble in water is an aromatic hydrocarbon, a halogenated hydrocarbon, or an ester. This cleaning solution, rich in a highly dissolving organic solvent, can rapidly and efficiently remove organic residues and polymers after polishing, while exhibiting excellent stability. Thanks to its unique formulation and efficient cleaning capabilities, the cleaning solution of this invention shows broad application prospects in fields such as semiconductor wafer cleaning.