8 results about "Chelating iron" patented technology

The application discloses a preparation method of a modified vanadium-iron denitration catalyst and relates to the technical field of catalysis. The application does not need to introduce tungsten-containing and molybdenum-containing raw materials in the whole process. A vanadium source alkaline solution and a citric acid chelated iron-copper chelated solution are prepared, a double-stage mixing in-situ composite process is adopted, the iron-copper chelated solution is added into a premixed material of a carrier and a vanadium source in a buried material type dropping mode, a linkage control system pH is stabilized, a V-Fe-Cu-O ternary solid solution is formed, then phosphorus elements are embedded and a molding aid is added to mix and form a plastic mud material, after aging, extrusion molding and gradient drying, the material is calcined in an oxidative atmosphere in stages, and a stable V-Fe-Cu-P composite solid solution is formed. Through time sequence decoupling and precise process control, the application realizes uniform dispersion of active component molecules at a molecular level, improves the denitration activity, mechanical strength and sulfur deactivation resistance of the catalyst, and the process is simple and suitable for industrial scale production.

This invention belongs to the field of plant tissue culture technology, specifically relating to a method for producing natural cellulose from adventitious roots and its application. The induction culture method includes: using industrial hemp leaves as explants, inducing callus formation, differentiating solid adventitious roots, and obtaining adventitious roots through liquid suspension culture; changing the ammonium-nitrate ratio in the 1 / 2 MS medium to 1000 mg / L potassium nitrate and 300 mg / L ammonium nitrate, and increasing the concentration of EDTA-Fe chelated iron, while keeping other substances unchanged; adding 2 mg / L gibberellin on the 14th day of culture, along with EDTA-2Na to eliminate CaSO4 and release sulfate ions, synergistically increasing cellulose content with gibberellin. Finally, transferring to a bioreactor, nitrogen gas is introduced through a nitrogen cylinder (hypoxia stress), employing a hypoxia-reoxygenation cycle, resulting in the optimal growth state of the adventitious roots from the industrial hemp roots, and the highest cellulose content in the resulting adventitious roots.

The application discloses a preparation method of a modified vanadium-iron denitration catalyst and relates to the technical field of catalysis. The application does not need to introduce tungsten-containing and molybdenum-containing raw materials in the whole process. A vanadium source alkaline solution and a citric acid chelated iron-copper chelated solution are prepared, a double-stage mixing in-situ composite process is adopted, the iron-copper chelated solution is added into a premixed material of a carrier and a vanadium source in a buried material type dropping mode, a linkage control system pH is stabilized, a V-Fe-Cu-O ternary solid solution is formed, then phosphorus elements are embedded and a molding aid is added to mix and form a plastic mud material, after aging, extrusion molding and gradient drying, the material is calcined in an oxidative atmosphere in stages, and a stable V-Fe-Cu-P composite solid solution is formed. Through time sequence decoupling and precise process control, the application realizes uniform dispersion of active component molecules at a molecular level, improves the denitration activity, mechanical strength and sulfur deactivation resistance of the catalyst, and the process is simple and suitable for industrial scale production.

This invention relates to a method and application for repairing cracks in tunnel concrete, belonging to the field of tunnel construction technology. The method includes the following steps: drilling holes into the cracked areas of the tunnel concrete structure to be repaired, serving as grouting and venting channels, and sealing the openings of the cracks on the concrete surface; sequentially injecting a chelated iron solution of concentration x and a hydrogen peroxide solution of concentration 3-5 wt% into the cracks in the tunnel concrete structure; after the reaction, flushing the inside of the cracks and blowing away any accumulated water; and injecting repair grout into the cracks to complete the repair of the tunnel concrete cracks. The chelated iron solution and hydrogen peroxide solution, through the strong oxidizing effect of hydroxyl radicals (•OH), target and degrade organic pollutants such as oil and algae within the cracks. They also produce in-situ micro-etching on the old, smooth concrete surface, significantly improving the interfacial bonding strength.

The application discloses a compound tea-flavored grape wine based on tea and grape juice synergistic fermentation and a preparation method thereof, and belongs to the technical field of food fermentation engineering. The method aims at solving the problem of traditional tea wine flavor fragmentation. The method comprises the following steps: preparing a modified tannase compound and a protein phytic acid mixture, mixing tea and grape juice, and then synergistically fermenting the tea and grape juice, wherein, in the fermentation process, the modified tannase is used to hydrolyze ester-type catechins to reduce bitterness and promote flavor integration; after the fermentation is completed, the protein phytic acid mixture is added to chelate iron ions and adsorb colloidal particles; and finally, the product wine is obtained through multi-stage clarification. Through the above technical scheme, the flavor coordination and physicochemical stability of tea wine are improved, the fusion of tea aroma and fruit aroma is realized, the flavor coordination and wine body stability are improved, no essence or traditional Chinese medicinal materials need to be added, and the product quality and production efficiency are improved.

The application belongs to the technical field of vegetable substrates, and particularly relates to a facility vegetable substrate in a plateau area and a preparation method thereof; the final mixture is obtained by mixing fermented sheep manure and nutrient soil, adding a mixture of vermiculite and a sodium carboxymethyl cellulose aqueous solution to obtain the vegetable substrate; the preparation method of the nutrient soil comprises the following steps: mixing urea, boric acid, EDTA chelated iron, EDTA chelated zinc, EDTA chelated copper and ammonium molybdate, heating to 38-42 DEG C, spraying a kH550 silane coupling agent solution, stirring at 58-63 DEG C for 1.8-2.2 h, adding to deionized water, heating to 40-43 DEG C, adding hydroxypropyl cellulose, polyvinylpyrrolidone, Tween 80 and sorbitol, spray drying, mixing with biochar and alfalfa powder to obtain the nutrient soil; the vegetable substrate prepared by the application has excellent water absorption and water retention performance, good ultraviolet radiation resistance, effectively promotes the growth and development of vegetables, and improves the yield and quality of vegetables.

This invention belongs to the field of foliar fertilizer technology, and particularly relates to a fourteen-element compound foliar fertilizer, which is a water-based formulation. It consists of nutrient element components, chelating agent components, synergistic adjuvant components, and deionized water, with each component comprising 100% by mass percentage. The specific formula is as follows: Macroelements and carbon source: urea 3.0-5.0%, potassium dihydrogen phosphate 2.5-4.0%, humic acid 1.5-3.0%; Medium elements: calcium nitrate 1.0-2.0%, magnesium sulfate 0.8-1.5%; Microelements: EDTA chelated iron 0.2-0.5%, EDTA chelated manganese 0.1-0.3%, EDTA chelated zinc 0.1-0.4%, EDTA chelated copper 0.05-0.2%, boric acid 0.3-0.6%, sodium molybdate 0.02-0.08%; Beneficial elements: potassium organosilicon 0.5-1.2%, sodium selenite 0.01-0.05%; Chelating agents: disodium EDTA 0.3-0.8%, citric acid 0.2-0.5%; Synergistic agents: xanthan gum 0.05-0.15%, sodium dodecylbenzenesulfonate 0.1-0.3%, polyethylene glycol 0.2-0.4%; Balance: deionized water.

This invention discloses a CS-SA bilayer microcapsule, its preparation method, and its application in encapsulating tuna protein peptides for chelated iron, belonging to the field of pharmaceutical technology. First, using tuna minced meat as raw material, tuna protein peptides for chelated iron are prepared through complex enzymatic hydrolysis and chelation reaction. Then, using sodium alginate as the wall material, single-layer microcapsules are prepared using a sharp-pore-coagulation method. Finally, using chitosan as the outer wall material, CS-SA bilayer microcapsules are prepared through electrostatic layer-by-layer self-assembly. The CS-SA bilayer microcapsules prepared by this invention have a dense structure, uniform particle size, and an encapsulation efficiency of up to 45.0%. They exhibit excellent sustained-release performance in simulated gastrointestinal fluid, with release stability significantly superior to single-layer microcapsules and commercially available iron supplements. This invention realizes the high-value utilization of tuna processing byproducts and provides a new approach for the development of iron supplements.