140 results about "Organic complexation" patented technology

The invention discloses a heavy metal absorbent and a preparation method and use thereof. The heavy metal absorbent is prepared by using an inorganic mineral modified by a surfactant as a carrier and loading organic complexing agent on the carrier, wherein the inorganic mineral is bentonite, kaolin, kieselguhr, zeolite, aluminum oxide or iron oxide; the surfactant is cationic surfactant or nonionic surfactant; and the organic complexing agent is a compound containing a sulfydryl and an amino. The heavy metal absorbent has the advantages of stable performance, environment friendliness, high absorption capacity, high selectivity, convenient post-recovery treatment and the like. The absorption capacities of cadmium, mercury lead and other heavy metals all exceed 100mg/g, and the heavy metal absorbent can achieve good treatment effect in treatment of water and soil environments polluted by heavy metals.

The invention relates to a compound soil remediation agent containing microorganism bacteria and a preparation method thereof. The remediation agent comprises the following components in parts by weight: 0.01-3 parts of bacillus pasteurii spore powder, 5-50 parts of phosphogypsum powder, 10-60 parts of organic compost, 5-50 parts of turf powder, 1.5-5 parts of potassium fulvate powder, 0.2-0.5 part of powdery bacteria powder carriers and 0.15-1 part of glycerin. The remediation agent has round and smooth grains and high grain hardness, is harmless to seeds, can serve as a base fertilizer together with other fertilizers, can be sown together with seeds, integrates multiple remediation functions including organic complexation and passivation remediation, inorganic passivation remediation, microorganism passivation remediation and the like, has a comprehensive and strong soil remediation function, and can stimulate growth and reproduction of arbuscular mycorrhizal fungi at the roots of crops, accelerate heavy metal passivation, stimulate crop growth and enhance the immunities of crops.

The invention discloses a treatment solution and a treatment method for preparing a golden cryolite conversion film on the surface of aluminum alloy. The composite conversion film prepared by the invention has a double-layer structure: an outer layer mainly containing organic complexes and an inner layer mainly containing Na3AlF6. The treatment solution comprises the following components in concentration: 1-5.0 g/L fluotitanic acid, 0.5-5.0 g/L fluorozirconic acid, 1-5.0 g/L tannic acid, 2-5.0 g/L film-forming accelerator fluoride and 2-5.0 g/L manganese salt; and the treatment solution is regulated with a base until the pH value is 3.0-5.0. The treatment solution disclosed by the invention is free of chromium and other toxic substances; the conversion and treatment process does not need heating and has the advantages of short treatment time, room-temperature treatment and simple process; and the chemical conversion film prepared by the treatment method has the advantages of excellentcorrosion performance, high binding strength with a base body, and no hexavalent or trivalent chromium harmful to environment and human bodies.

The invention discloses a method for preparing a ferrite nano fiber. The method comprises the following steps of: dissolving metal salt which can form ferrite into glacial acetic acid, adding deionized water to obtain metal salt solution; weighing Fe(3+) salt and dissolving the Fe(3+) salt into the deionized water; evenly stirring to obtain Fe(3+) salt solution; weighing citric acid according to a certain ratio, dissolving the citric acid in the Fe(3+) salt solution, mixing the obtained solution with metal salt solution, and then evaporating the obtained solution to form collosol; weighing an organic complexing agent, and dissolving the organic complexing agent into absolute ethyl alcohol or deionized water, so as to obtain organic complexing agent solution; adding the obtained gel to the obtained organic complexing agent solution and evenly agitating, so as to obtain spinnable precursor solution; carrying out electrostatic spinning to prepare a precursor fiber; and then drying, and burning for 1-3 hours in air atmosphere at 700-1000 DEG C, so as to obtain the ferrite nano fiber. The ferrite nano fiber with high performance disclosed by the invention can be used as a magnetic recording material, an electromagnetic microwave absorber and a structural wave-absorbing material.

The invention relates to a technology for treating and reusing sewerages of industrial circulating water, which is characterized in that a photocatalytic oxidation treatment technology of composite titanium oxide is adopted to treat the sewerages of industrial circulating water, and an inorganic and organic complexation, flocculation and deposition method is adopted to remove colloid, suspended substances, and the like in the sewerages; then the sewerages are treated through a hollow fiber ultrafiltration membrane and a reverse osmosis membrane, and obtained produced water can be reused for a production water and boiler water circulatory system. The technology can remove COD and TOC caused by water treatment agents in the sewerages of the circulating water, the content of the COD after treatment can be reduced to be below 50mg/L from 300mg/L before the treatment, the content of the TOD is reduced to be below 10mg/L from 100mg/L, and drained water can meet Category A and Class 1 under the standard of the discharge standard of pollutants for municipal wastewater treatment plants (GB18918-2002).

A Mn-Zn ferrite fiber and the preparation method relate to the inorganic non-metallic materials and the preparation technical field. The present invention uses citric acid and metal salts of magnesium, manganese, zinc and iron as raw materials to get precursor solution through chemical reactions, and then precursor gel is obtained through decompression and dehydration to get the gel cellulose filament through spinning; the gel cellulose filament will then be baked to get spinel-type Mg1-x-yMnxZnyFe2O4 series ferrite ceramic fibers, wherein, x is less than 1 but more than 0, y is less than 1 but more than 0, -xy is less than 1 but more than or equal to 0. Through organic complexation gel precursor conversion, Mn-Zn ferrite ceramic fibers with uniform diameter, smooth surface and larger aspect ratio are obtained at low sintering temperature, therefore, the invention has the advantages of simple process, low equipment requirements, low cost and short operation cycle.

The invention relates to a titanium dioxide-organic complex collosol, a preparing method thereof and a combination comprising the collosol is used for forming moderate, high and ultrahigh refractive index coating layers. The preparing method comprises following steps: through adding organic complex in titanium dioxide collosol generated by a collosol-gel reaction, preparing titanium dioxide-organic complex; drying the product; redispersing the product in a spreading solvent. The titanium dioxide-organic complex collosol has monodispersity, excellent compatibility with the organic solvent and storage stability. Specially, titanium dioxide nanometer particles are dispersed with high high concentration and redispersed in the organic solvent to keep transparent, so the titanium dioxide-organic complex collosol can be used for forming paint combination with moderate, high and ultrahigh refractive index coating layers.

The invention discloses an alkaline zinc-nickel alloy wastewater treatment method. The method comprises the following steps: 1, pretreating: adding an acid to adjust the pH value of alkaline zinc-nickel alloy wastewater to 8-9.5; 2, performing complex breaking treatment on the treated alkaline zinc-nickel alloy wastewater to decompose and destroy most of organic complexing agents and other additives in the wastewater, and allowing nickel in the wastewater to be combined with substances produced during decomposing and destroying to form a solid insoluble matter; 3, performing solid-liquid separation to obtain the solid insoluble matter and a filtrate; 4, adding the acid to the filtrate to adjust the pH value of the filtrate to 2.5-4; 5, sequentially adding a metal salt and an oxidant to thefiltrate, and performing an oxidation reaction; and 5, adding an alkali to the oxidized wastewater to adjust the pH value of the wastewater to 10-11 and precipitate the solid insoluble matter, and performing solid-liquid separation. The method can be used to specifically treat stably-complexed heavy metal nickel in the alkaline zinc-nickel alloy wastewater, effectively reduces the CODCr value andthe heavy metal nickel content of the wastewater, and allows the highest treatment concentration of the heavy metal nickel to reach 60 mg/L.

The invention belongs to the technical field of nano-materials, and relates to a preparation method of a magnetic metal or alloy film with a nano-structure. The preparation method of the film comprises the following steps: (1) a reaction solution preparation: dissolving a magnetic metal salt in distilled water, adding an organic complexing agent, a strong base, a reducing agent and alcohols into the solution and stirring to form a clear and transparent solution, wherein the organic complexing agent contains at least one of amino, carboxyl and hydroxyl; and the alcohols with a boiling point lower than that of water are capable of mixing and dissolving with water; and (2) tightly pressing a substrate film on the inner wall of a reaction container, transferring the prepared reaction solution in the reactor, sealing the reactor and placing the reactor at the central part of an annular column-shaped magnet, and heating the reaction container to carry out the reaction, wherein the reduced metal or alloy nano-particles are migrated to the substrate film under the effect of a magnetic field and deposited on the film, then the magnetic metal or alloy film with the nano-structure is prepared. The preparation method is low in cost, simple in device and technical condition, cheap in reagent and applicable for production on a large scale.

A related processing method for organic complexed nickel wastewater comprises the following steps: (1) adding H2SO4 to adjust the pH value of wastewater to 2.5-3.5; (2) adding a ferrous ion and hydrogen peroxide and stirring, wherein the mass ratio of ferrous ion to hydrogen peroxide is 0.2; (3) adding Ca(OH)2 to adjust the pH value of wastewater to 9.5-10.5; (4) adding 50-500 ppm of polyaluminum chloride and stirring for 5 min; (5) adding 0.5-5 ppm of anions, stirring for 18 min, and precipitating for 18 min; and (6) filtering, and measuring the nickel content of filtered water. The beneficial effects comprise that the method is low in cost, less in reagent usage, free of secondary pollution, free of generation of odorous gases, relatively excellent in removing effect on nickel in various states in water body, and high in nickel-removing cost performance, and has the nickel removal rate up to 99.8%.

The invention relates to a hydrocracking catalyst and a preparation method thereof. The preparation method comprises: (1) loading the water-soluble salt of a hydrogenation metal active component and an organic complexing agent onto a carrier by using an impregnating method, drying, and calcining to obtain a semi-finished product catalyst, wherein the charcoal content in the semi-finished product catalyst is 0.03-0.5 wt% based on the total amount of the semi-finished product catalyst under the calcining condition; and (2) impregnating the semi-finished product catalyst obtained in the step (1)by using a solution containing an organic complexing agent as an impregnating liquid, and drying without calcining, wherein the carrier contains an inorganic heat-resistant oxide and a macroporous molecular sieve. According to the present invention, the catalyst produced through the method has high catalytic activity in the hydrocracking of hydrocarbon oil.

The embodiment of the invention provides a complex iron catalyst solution and a preparation method of the complex iron catalyst solution. The complex iron catalyst solution is prepared from the following raw materials: an iron source containing sulfate radicals, an organic complexing agent, a pH regulator and a stabilizer, wherein the molar ratio of the organic complexing agent to the iron element in the iron source is 1.0-2.0, the molar ratio of the stabilizer to the iron element in the iron source is 1.0-2.0, and the pH value of the complexing iron catalyst solution is adjusted to 8.0-12.0 by the pH regulator. The complex iron catalyst solution disclosed by the embodiment of the invention can be used for removing hydrogen sulfide, that is, oxidizing hydrogen sulfide gas into elemental sulfur, and can improve the desulfurization efficiency.

The invention belongs to the technical field of biomedical functional material preparation, and relates to a preparation method of a dynamic pH response chain based on a boric acid type metal organiccomplex. Therefore, a boronate ligand is introduced by utilizing the metal organic complex, then an anti-cancer drug doxorubicin (DOX) is loaded on through the porous structure of the metal organic complex, and hydrophilic biologic chain (PEG-NHS-PDA) is attached to serve as the dynamic response chain to achieve the purpose of sustained releasing and preventing the anti-cancer drug from releasingat will. Finally sialic acid on the surfaces of cancer cells is identified through the metal organic complex, and growing of the cancer cells is inhibited through a thermal therapy effect.

The invention relates to a method for preparing a cobaltosic oxide single-dimensional nano material, comprising the following steps: confecting organic complexation aqueous solution with mass concentration of 1-6%; uniformly mixing metal salt containing cobalt element and the organic complexation aqueous solution according to mass ratio of 1:5-5:1 between the metal salt and the organic complexing agent; soaking a substrate in the mixed solution, tiling the substrate at the bottom of the solution; putting the mixed solution provided with the substrate in a oven and heating up the mixed solution to 120-150 DEG C at the speed of 5-20 DEG C/min, preserving heat for 0.5-3h; transferring the prepared sample to a tank type resistance furnace, heating up the sample to 290-310 DEG C at the speed of 5-20 DEG C/min and preserving heat for 0.5-1h; heating up to 530-560 DEG C at the speed of 5-20 DEG C/min and preserving heat for 0.5-3h, forming the cobaltosic oxide single-dimensional nano material on the substrate. The technology provided by the invention can prepare more uniform nano materials with smaller size, the technology is also further simplified, and the raw material has wider selective range, thus further reducing the production cost.

The invention provides a lithium ion battery anode material and a preparation method thereof. The preparation method comprises the steps: adding a soluble lithium source, a source A and a source B into dispersion liquid containing an organic complexing agent; evenly stirring to obtain a solution; adjusting a pH of the solution as 6 to 8; adding alcoholic organic solvents into the solution; continuously stirring under 70 to 90 DEG C until gel is formed; performing low temperature sintering on the gel after the gel is aged; performing high temperature sintering again after cooling to obtain thelithium ion battery anode material. A molecular formula of the lithium ion battery anode material is LiAO2-LixBOy, the x is larger than or equal to 2 and smaller than or equal to 4, and the y is larger than or equal to 3 and smaller than or equal to 5. The lithium ion battery anode material LiAO2-LixBOy (the x is larger than or equal to 2 and smaller than or equal to 4, and the y is larger than orequal to 3 and smaller than or equal to 5) prepared by the preparation method disclosed by the invention has high capacity and good cycling performance.

The invention discloses a preparation method of a cerium-zirconium based solid solution. The preparation method comprises the following sequential steps: (1) preparation of Ce<4+>; (2) preparation of active ingredient solution; (3) precipitation reaction; (4) surface modification; (5) roasting. The Ce<4+> is prepared firstly and then mixed with other rare earth ions and positively quadrivalent zirconium ions to obtain a mixed metal nitrate solution; as the mixed metal nitrate solution contains an organic complexing agent, the precipitation speed in the precipitation reaction process is controlled by virtue of complexing coordination of the organic complexing agent and the rare earth and zirconium ions, so that a precursor uniform and stable in particle size is obtained; the surface treatment is performed on the precipitate precursor by use of polyacrylic acid, and therefore, the agglomeration problem of particles in the roasting process is solved, and the pore diameter and the pore volume of the roasted product are increased, and consequently, the cerium-zirconium based solid solution catalytic material excellent in heat stability is obtained. The preparation method is suitable for the preparation of the solid solutions.

The invention discloses fertilizer capable of reducing lead pollution. The fertilizer is prepared from, by weight, 60-80 parts of charcoal, 20-30 parts of excrement of livestock, 10-12 parts of compound fertilizer, 10-12 parts of phosphorus pentoxide, 3-5 parts of potassium oxide, 2-4 parts of compound microorganism bacterium agent, 10-15 parts of potassium fulvic acid, 3-5 parts of cellulose and6-10 parts of auxiliaries. The fertilizer contains rich elements like nitrogen, phosphorus and potassium, and the nutrients needed for the growth of crops are effectively guaranteed; more importantly,potassium fulvic acid is polycondensate of a multivalence phenol-type aromatic compound and a nitrogen compound, and can be subjected to organic complexation and adsorption with lead ions, the activity of the lead ions is lowered, the absorption of the lead ions by the crops is effectively reduced, and the deposition of lead in tissue and organs of the human body is reduced.

The invention belongs to the field of heavy metal pollution control, aims at solving the problem of efficient removal of heavy metals in organic complexing wastewater, and particularly relates to a preparation method and application of MCS/SA-PEI composite hydrogel beads. The preparation method of the composite hydrogel beads comprises the following steps: dissolving an amino-modified reagent andchitosan powder in ultrapure water, and adding a cross-linking agent I to form amino-modified chitosan MCS; the preparation method comprises the following steps: uniformly mixing MCS powder and sodiumalginate (SA) powder in proportion at normal temperature, and dropwise adding the mixture into a coagulating bath to form MCS/SA hydrogel beads; and finally, putting the MCS/SA hydrogel beads into the PEI solution, and adding a cross-linking agent II to carry out cross-linking reaction, thereby obtaining the composite hydrogel beads. When the composite hydrogel ball bead is added into heavy metalorganic complexing wastewater, the comprehensive effects of adsorption bridging, electrostatic attraction and the like can be achieved, and efficient separation and removal of complexing-state heavymetal are achieved. The composite hydrogel ball disclosed by the invention is simple in preparation process, low in cost, stable in structure and good in recovery performance. Various heavy metals canbe efficiently separated and recycled from a wide variety of organic complexing wastewater, and the method has a wide application prospect.

The invention discloses an acidic cyanide-free copper-tin alloy electroplating bath. The electroplating bath is an acidic system and adopts inorganic salt as the main salt, a dispersing agent and a gloss agent are added and used in the electroplating bath, and the system can be used for effectively increasing the current efficiency of a process, thus the deposition velocity of an electroplating layer is increased, and the defect that an alkali cyanide-free copper-tin alloy electroplating layer is thinner is overcome. The electroplating bath disclosed by the invention is simple in operation, low in cost and wide in current density range; and the prepared electroplating layer is uniform and bright in appearance, good in binding force and high in corrosion resistance. The electroplating bath disclosed by the invention contains no cyanide and lead and no other heavy metal additives and organic complexing agents, so that the electroplating bath is safe and environment-friendly, the damage of the electroplating bath to the ecological environment is effectively avoided, and the wastewater treatment cost is effectively reduced.

The invention provides a fluoride-free liquid alkali-free accelerator as well as a preparation method and application thereof. The fluoride-free liquid alkali-free accelerator comprises the following raw materials in parts by weight: 450-600 parts of aluminum sulfate, 5-20 parts of a stabilizer, 25-150 parts of an organic complexing activator, 20-100 parts of alcohol amine, 0-10 parts of organic alcohol, 10-75 parts of an early strength agent, 0-10 parts of a neutralizer and deionized water. Wherein the organic complexing exciting agent is a high-molecular multipolymer which is obtained by carrying out redox initiation polymerization on unsaturated amide, unsaturated silane and unsaturated sulfonic acid monomers. The liquid alkali-free accelerator provided by the invention has the characteristic of rapid development of compressive strength in 6h and 1d, has the characteristics of no fluorine and chlorine, good stability, low mixing amount, fast coagulation, high later strength retention rate and the like, and can be widely applied to engineering construction such as railway tunnel and mine roadway support, repair and reinforcement, water prevention and leakage stoppage and the like.