52results about How to "Reduce complexation" patented technology

The invention discloses a restoration agent and a preparation method thereof and a method using the restoration agent to restore heavy metal-polluted soil, and belongs to the technical field of restoration of heavy metal soil pollution. The restoration agent is prepared from the following raw materials of biochar, sepiolite, monocalcium phosphate, sugarcane residues, lime powder, longan peel, tartaric acid, hydroxyethyl triphosphate, potassium lignosulphonate, malic acid, chitosan and soybean straw. The restoration agent is prepared by the following steps of powder preparing, fermenting, powder drying and the like. The restoration agent has the advantages that the preparation technology is simple; when the restoration agent is used for restoring the heavy metal-polluted soil, the removal rate of mercury, cadmium, lead, arsenic and pyrene is increased.

The invention relates to a preparing method for an ordinary-pressure positive-ion dyeable polyester fiber. The preparing method includes the steps that dimethyl isophthalate-5-sodium benzenesulfonate,ethylene glycol, a catalyst and an anti-ether agent are mixed to be subjected to an ester exchange reaction, the reaction is end, then ethylene glycol and sodium ethylene glycol are added, modulationis carried out, then terephthalic acid, ethylene glycol and a catalyst are mixed, and the mixture is subjected to an esterification reaction; the modulated product after the ester exchange reaction is end and polyethylene glycol are added into an esterification reaction system reaching the end point of the esterification reaction, condensation polymerization is carried out, and spinning melt is obtained; the spinning melt is measured, extruded, cooled, subjected to oil applying, stretched, subjected to heat setting and wound, and the ordinary-pressure positive-ion dyeable polyester fiber is prepared. According to preparing method, generation of impurities in the polyester-fiber production process is reduced, pressure rising of a spinning assembly and a filter is reduced accordingly, the service cycle of the polyester fiber is prolonged, the continuity and the safety of the whole production process are guaranteed, and the preparing method has the good economic value and popularizationvalue.

The invention relates to a method for efficiently extracting germanium from a zinc-germanium leaching solution, and belongs to the technical field of hydrometallurgy in nonferrous metallurgy. The method comprises the following steps of adding a purifying agent into the zinc-germanium leaching solution, reacting for 10-20 minutes under a stirring condition so as to obtain a solution system A, and carrying out solid-liquid separation so as to obtain a solution B; and adding a tannin extract into the solution B, reacting for 1-10 minutes under a stirring condition, then slowly adding tannic acid, reacting for 10-20 minutes so as to obtain a system C, carrying out solid-liquid separation so as to obtain germanium-precipitated liquid and tannin germanium slag, and washing the tannin germanium slag so as to obtain tannin germanium. According to the method, the purifying agent is added to react with impurity ions so as to generate insoluble substances, a filtrate with high germanium content and low impurity element content is obtained through filtration, then germanium precipitation is carried out in sequence after the tannin extract and the tannic acid are added, the germanium precipitation rate reaches 98.9%, the germanium content in the tannin germanium reaches 5%, the purity of the tannin germanium is improved, the tannin extract is lower in price and lower in production cost compared with the tannic acid, and an existing germanium precipitation process can be obviously optimized. The method has the characteristics of low labor intensity, high germanium extraction rate and low production cost.

The invention discloses an anti-seismic prefabricated house, comprising a plurality of steel plates, wherein the outer side of each steel plate is treated by a phosphating solution to form a phosphating film, and the phosphating solution comprises the following components in parts by weight: 35-45 parts of phosphoric acid, 0.2-0.4 parts of copper nitrate, 20-25 parts of zinc oxide, and 10-15 partsof compound accelerant. The anti-seismic prefabricated house provided by the invention has the advantages: as the main film-forming materials, the phosphoric acid and zinc oxide can form a continuous and uniform phosphating film on the surface of the processed. Meanwhile, the addition of the compound accelerator further improves the film forming speed and film forming quality of the phosphatingfilm. In addition, because the electrode potential of copper is higher than that of iron, copper ions are reduced and deposited on the surface of a phosphated hinge body, so the cathode area on the surface is increased; the electrochemical reaction of phosphating is further promoted, the formation of phosphating crystal nucleus is accelerated, crystal grains are refined, and the phosphating film is compact and uniform; meanwhile, the phosphating speed is improved, the phosphating temperature is reduced, and finally the phosphating film has the advantages of compact film formation and strong adhesive force.

The invention discloses a compound preparation for deodorizing a farm and reducing mycotoxins in a feed. The compound preparation is characterized by being prepared by mixing cinnamaldehyde and sodiumhumate in a weight ratio of 1:(2-5), and conducting stirring and sieving. The compound preparation of the invention has the advantages of reducing an odor caused by ammonia gas, hydrogen sulfide andindole in a livestock farm, reducing the mycotoxin content in the feed and promoting growth of livestock, wherein the sodium humate has the efficacy of regulating the acid-base balance in the livestock, promoting digestion and reducing the odor of livestock manure, and also has the efficacy of reducing mycotoxins in the feed, and the cinnamaldehyde exerts a synergistic effect by inhibiting growthof fungi in the feed and reducing production of mycotoxins.

The invention discloses a method for eliminating a nano porous layer on the surface of a titanium dioxide nano tube array, and relates to a method for eliminating a titanium dioxide nano porous layer. The invention provides a method for eliminating a nano porous layer covering the surface of a titanium dioxide nano tube array which is prepared by using an electrochemical anode oxidation method. The method comprises the following steps of: firstly, preparing a soaking liquid by using deionized water, hydrofluoric acid and nitric acid; and secondly, soaking the titanium dioxide nano tube array of which the surface is covered by the nano porous layer into the soaking liquid, taking out after soaking, washing by using the deionized water so as to eliminate the nano porous layer covering the surface of the titanium dioxide nano tube array. By utilizing the method, not only is the nano porous layer on the surface effectively eliminated, but also the structure of the titanium dioxide nano tube array is kept, and the operation that other nano materials of nano points, nano wires, nano rods and the like are assembled in nano tubes can be successfully carried out. The treated titanium dioxide nano tube array can be applied to the field of water treatment.

The invention discloses electroplating liquid of a trivalent chromium system for ferrochrome electrodeposition and a preparation method thereof. A solvent of the electroplating liquid is water, and pHis 2.7-4.5. Solutes comprise trivalent chromium main salt, a trivalent chromium main complexing agent, a trivalent chromium auxiliary complexing agent, ferrous main salt, conducting salt, a buffer agent, a stabilizer, a surface active agent and a composite brightening agent. Trivalent chromium is coordinated in a composite coordinating mode, the coordinating capacity of water molecules on the trivalent chromium is lowered, and thus the deposition efficiency of chromium on the surface of a cathode is improved. The specific main complexing agent is micromolecular carboxylic acid and salt of themicromolecular carboxylic acid and can replace the water molecules to be complexed with the trivalent chromium, trivalent chromium electroreduction is promoted, the main complexing agent and the specific auxiliary complexing agent are complexed with trivalent chromium ions jointly to form a combined composite complex, and trivalent chromium electroreduction is further promoted.

The invention discloses an archaistic bamboo joint resin tile and a preparation method thereof. The archaistic bamboo joint resin tile is prepared from the following raw materials, by weight: 100-120parts of PVC resin, 5-10 parts of engineering plastic, 30-50 parts of light calcium carbonate, 0.5-1 part of an antioxidant, 0.1-1 part of an anti-aging agent, 3-5 parts of a plasticizer and 2-3 partsof a flame retardant. The antioxidant belongs to a hindered phenol antioxidant and the relative molecular mass of antioxidant molecules is large, so tht the volatility of antioxidant molecules is further reduced; active double bonds contained in molecules of the anti-aging agent can be copolymerized with macromolecular monomers in the resin tile, so that precipitation of the anti-aging agent is prevented; and the antioxidant and the anti-aging agent are mixed for use, so that the resin tile still has good oxidation resistance and aging resistance after being used for a long time, and the service life of the archaistic bamboo joint resin tile is prolonged.

The invention relates to the technical field of preparation of lithium ion battery precursor cobaltosic oxide, in particular to a preparation method of homogeneous-phase aluminum-doped small-particle-size cobaltosic oxide. According to the method, a composite complexing agent is adopted to balance the reaction rate of Co <2+> and Al <3+> in the system, so that Co <2+> and Al <3+> can be subjectedto homogeneous coprecipitation, and the purpose of uniformly doping aluminum is achieved, by adopting the composite complexing agent, the combination degree of the complexing agent and metal ions canbe effectively controlled, so that the concentration of the metal ions in the tail liquid is reduced. The particle size of the aluminum-doped cobaltosic oxide prepared by the method is 2.0-6.0 [mu]m,the morphology of the aluminum-doped cobaltosic oxide is spherical, the tap density of the aluminum-doped cobaltosic oxide is 2.6-3.0 g/cm <3>, and the mass percent of Al is 0.1-1.2%.

The invention discloses a novel thiorhodanine reagent 5-(2-methyl-4-carboxylphenyl)-azo-thiorhodanine a method for preparing a graphitized carbon black solid-phase extraction column loaded with the thiorhodanine reagent, and the use of the solid-phase extraction column for solid-phase extraction of palladium. In solid-phase extraction, a palladium-containing solution flows through the solid-phase extraction column, palladium can react with the reagent loaded on the solid-phase extraction column to produce a stable complex compound so that palladium is adsorbed on the solid-phase extraction column, palladium is enriched on the solid-phase extraction column until saturated, and then palladium on the solid-phase extraction column is eluted with 0.5 to 2% thiourea as eluent. The solid-phase extraction column has high palladium enrichment factor and large extraction capacity, and the reagent can be repeatedly used. The single-extraction rate of palladium can exceed 96.8%, the enrichment factor exceeds 400, and the palladium extraction capacity of the reagent is more than 23.4 mg/g.

The invention provides a regeneration method of an deactivated hydrogenation catalyst. The regeneration method comprises the following steps: carrying out charking treatment on the inactivated hydrogenation catalyst; dipping the charked deactivated hydrogenation catalyst in a solution containing a hydroxyl and/or carboxyl chelated ligand compound; and carrying out microwave vacuum drying on the catalyst subjected to dipping treatment so that the deactivated hydrogenation catalyst then recovers the activity. According to the technical scheme, microwave vacuum drying is adopted, due to the factthat operation is carried out under the condition of air isolation, oxygenolysis cannot occur in the drying process even if the decomposition temperature of an organic additive is high, and the utilization rate of the organic additive is remarkably increased.

The invention discloses a simple method for measuring starch retrogradation degree, which belongs to the technical field of starch retrogradation degree measurement. Based on the principle that the retrograded starch has a lower iodine complexing capacity, the method comprises: firstly, drying a retrograded sample at a low temperature, dissolving and dispersing the retrograded starch in alkaline solution, and adjusting the pH value of the complexation reaction solution of the starch solution and iodine; and secondly, measuring the absorbancy of the measured sample at a wavelength of 600 nanometers, and converting the absorbancy into the starch retrogradation degree. Compared with the classic starch retrogradation degree measuring method, the method established by the invention has the advantages of simple and easy-to-implement operation, short measurement time and high accuracy. The method is suitable for measuring the retrogradation degrees of grain foods with high content such as rice and wheat and indirectly evaluating the shelf life of related foods with high starch content.

The invention relates to the field of lithium ion batteries, in particular to an electrolyte and a lithium ion battery. The electrolyte contains electrolyte salt, an organic solvent and an additive. The additive contains a boron salt additive. The additive further contains an SEI film-forming additive. The anion part of the boron salt additive can effectively disperse the negative charge density of anions, a negative charge center is shielded by a ligand with a large structure, therefore, an anode is effectively protected during circulation, and the circulation performance of the high-voltage battery is improved.