4results about How to "Improve chelation ability" patented technology

The present application relates to the field of chemistry, and provide a kind of preparation method of glycyrrhizin dipotassium salt based on chelating resin deep removal heavy metal, comprising the following steps: glycyrrhizin monoammonium salt is added to alkaline pure water solution, stirring, adjust pH to 7.5~8.5, obtain solution;The obtained solution is passed through mixed resin column, flush mixed resin column, combine effluent, concentrate and dry, obtain glycyrrhizin dipotassium salt;Wherein, the mixed resin in the mixed resin is the composition of cation exchange resin and new chelating resin.The preparation method of the present application is simple and reasonable, green and environmental protection, in the preparation process, using cation exchange resin and new chelating resin promote glycyrrhizin dipotassium salt purification, so that the residual alcohol content in the obtained glycyrrhizin dipotassium salt is ≤500mg / kg, residual ammonia content is ≤40mg / kg, and lead, cadmium, arsenic, mercury content is all ≤0.2mg / kg.

The application discloses a treatment system for treating strongly complexed heavy metal wastewater in an electroplating industry, comprising an oxidation reaction tank, a Fenton-like reaction tank, a homogenizing adjusting tank, a chemical mixing tank, a No. I flocculation tank, a No. I sedimentation tank, a heavy metal adsorption tank, a No. II flocculation tank, a No. II sedimentation tank and a clean water tank which are connected in sequence; wherein, the bottom of the No. II sedimentation tank is provided with two sludge discharge ports, one of which is connected with the heavy metal adsorption tank through a sludge backflow pipeline, and the other is connected with a regeneration system. The application also discloses a method for treating strongly complexed heavy metal wastewater in the electroplating industry based on the treatment system. The method adopts the process of first oxidizing and breaking the complex, then adding alkali to precipitate, and finally modifying zeolite to adsorb, so that the electroplating strongly complexed heavy metal wastewater can be treated, the concentration of heavy metal ions in the effluent can be stably reduced to below 0.1 mg / L, and the discharge standard can be reached.

This application belongs to the technical field of metal passivating agents, specifically providing a composite metal passivating agent and its preparation method, including the following steps: magnesium carbonate and barium carbonate are mixed, dissolved in nitric acid, and then the pH is adjusted to 5.5-6.3. After heating, enzymatically hydrolyzed peptides, alkylated cyclodextrin, and diisooctyl phosphate are added, and the mixture is stirred to obtain the final product. The enzymatically hydrolyzed peptides are obtained by purifying soybean meal through hydrolysis with a complex protease. The alkylated cyclodextrin is obtained by modifying cyclodextrin with a silane coupling agent. The composite metal passivating agent prepared in this application has a good synergistic effect and can improve the activity of the catalyst.

The application belongs to the technical field of fertilizers, and provides a preparation method of modified fulvic acid and application of the modified fulvic acid in fertilizers.The preparation method of the modified fulvic acid comprises the following steps: step 1, dissolving fulvic acid in deionized water, ultrasonic activation, after reaction, drying to obtain activated fulvic acid; step 2, dissolving the activated fulvic acid in a sodium hydroxide solution, heating to 40-45 DEG C for 10-15 min, after cooling, adjusting pH, adding a polymer monomer and an initiator, heating to 40-45 DEG C for 3-3.5 h, and drying to obtain modified fulvic acid. The application introduces new functional groups, such as amide groups, into fulvic acid molecules through chemical reactions, so as to enhance the chelating capacity or adsorption performance of the fulvic acid on specific nutrient elements, thereby effectively preventing the fixation of the elements in soil, and improving the absorption efficiency of the elements by plants.