60 results about "Ferric oxyhydroxide" patented technology

An iron-dextran compound for parenteral treatment of iron-deficiency anemia comprises hydrogenated dextran having a weight average molecular weight (Mw) between 700 and 1,400 Daltons, preferably approximately 1,000 Daltons, a number average molecular weight (Mn) of 400 to 1,400 Daltons and wherein 90% by weight of the dextran has molecular weights less than 2,700 Daltons and the Mw of the 10% by weight fraction of the dextran having the highest molecular weights is below 3,200 Daltons, said hydrogenated dextran having been subjected to purification by membrane processes having a cut-off value between 340 and 800 Daltons, in stable association with ferric oxyhydroxide. The compound is produced by using membrane processes to eliminate dextrans of higher molecular weights than approximately 2,700 Daltons and membrane processes to remove saccharides of molecular weights below approximately 340 Daltons from hydrogenated dextran before precipitating ferric hydroxide in the presence of said dextran followed by heat treatment and purification.

This invention provides a process for preparing sodium ferric gluconate complex in sucrose using the following steps: a) combining a ferric salt solution with a weak alkali chosen from the group consisting of alkaline earth metal and ammonium salts, such as sodium carbonate, sodium bicarbonate, lithium carbonate, potassium carbonate, potassium bicarbonate, ammonium carbonate, ammonium bicarbonate and mixtures thereof, to form the ferric oxyhydroxide; b) combining ferric oxyhydroxide and sodium gluconate in solution to yield the sodium ferric gluconate complex; c) isolating the sodium ferric gluconate complex; and d) combining the sodium ferric gluconate with sucrose in solution to yield the desired sodium ferric gluconate complex in sucrose.

The invention relates to compound type desulfurization grout. According to the compound type desulfurization grout, ferric oxyhydroxide is added into a complex iron desulfurization solution, so that the desulfurization is carried out by virtue of a synergistic effect of the ferric oxyhydroxide and the complex iron desulfurization solution; compared with the prior art, the problem that the desulfurization cost is relatively high because the large amount of complexing solution is circularly used when a ferric complex singly taken as a desulfurization agent with the relatively low saturated sulfur capacity is used for removing H2S by virtue of a wet method is solved; the complex iron desulfurization solution is effectively mixed with the ferric oxyhydroxide, so that the characteristics of high desulfurization speed and desulfurization efficiency of the complex iron desulfurization solution are combined with the high-sulfur-capacity characteristic of the ferric oxyhydroxide, so that the relatively high desulphurization efficiency and the relatively high sulfur capacity are maintained, and the high-speed, high-efficiency and high-precision desulphurization is realized.

The invention provides a preparation method of zero-valent iron/graphene 3D nano-microcapsules; the preparation method comprises the steps: firstly, respectively oxidating a graphite powder to obtain graphene oxide, and carrying out a hydrolysis reaction of a trivalent iron salt to obtain ferric oxyhydroxide; then treating graphene oxide and ferric oxyhydroxide by an aerosol method to obtain iron oxide/graphene 3D nano-microcapsules; and finally, carrying out high-temperature calcination on the iron oxide/graphene 3D nano-microcapsules in a hydrogen/argon environment to obtain the zero-valent iron/graphene 3D nano-microcapsules. Iron nanoparticles in the iron oxide/graphene 3D nano-microcapsules prepared by the method provided by the invention have good dispersity, are controllable in structure and size, can be stored for a long term and remain stable, and effectively avoid the defects that iron nanomaterials, especially nano zero-valent iron particles, are extremely unstable and are easily passivated and agglomerated. The zero-valent iron/graphene 3D nano-microcapsules prepared by the method can be used in the fields of dye decolorization, heavy metal adsorption and other pollution environmental remediation, as well as magnetic resonance imaging and other magnetic materials.

The invention discloses a preparation of an electrochemical sensor with real-time visual colorimetric display, and relates to the technical field of the electrochemical detection. The preparation method comprises the following steps: preparing nickel through a potential deposition method; taking ferric oxyhydroxide/bismuth vanadate nanometer composite material as photoanode, taking electrically-polymerized Prussian blue as photocathode and preparing a laccase catalyst as the biological cathode, and connecting with a portable digital multimeter and a capacitor by utilizing an external coil. Under the specific binding effect of the antigen-antibody, the glucose is promoted to produce hydrogen peroxide under the catalysis of the glucose oxidase, thereby accelerating the nickel under the illumination; in the process of producing the ferric oxyhydroxide/bismuth vanadate photoelectron, the produced instantaneous current can be read through the digital multimeter, and the Prussian blue receiving electron is changed as the Prussian white and can be used as the synchronous colorimetric display. After the reaction is finished, the Prussian white connects with the laccase to recover an initial state and change as the Prussian blue; the circulation of the photocathode material provides great convenience for the construction of the sensor.

The invention relates to a ferric oxyhydroxide material modified by metal-doped cyclodextrin. The ferric oxyhydroxide material is a composite material formed by coating ferric oxyhydroxide and a metalion or metal with cyclodextrin, wherein the mass ratio of the cyclodextrin to the metal ion or metal to the ferric oxyhydroxide is 5-30: 0.1-10: 100; the ferric oxyhydroxide material is prepared by adding iron salt, metal salt and cyclodextrin to water and performing one-step reaction synthesis. The composite material provided by the invention greatly improves a catalysis effect of the ferric oxyhydroxide by doping of precious metals or transition metals and modification of cyclodextrin, not only has characteristics of hydrogen peroxide catalysis, photocatalysis, enzyme-like catalysis and thelike, but also has a host-guest inclusion effect of cyclodextrin supermolecules, and plays an important role in catalytic degradation of pesticide, physiological hormone and other types of pollutantsin water by the excellent catalysis performance and the inclusion effect of supermolecules.

The invention relates to the field of treatment of reclaimed water, especially to a method for removing organic matters in reclaimed water by using in situ FeOxHy. Directed at the problem that secondary effluent of a municipal sewage plant has high content of organic matters, the invention brings forward the method of improving removal effects of coagulation, deposition and filtration units of a reclaimed water plant on organic matters by using combined action of an alkali salt and a ferric salt, wherein an alkali salt solution and a ferric salt solution are added according to a certain mol ratio and react with each other to produce in situ FeOxHy which enables organic matters in water to be agglomerated and adsorbed and settling properties of floc to be improved, and removal of the organic matters is further realized by using a solid-liquid separation reactor. The method can be used for deep purification of secondary effluent of the municipal sewage plant and is also applicable to a reclaimed water treatment project using effluent of the municipal sewage plant or rainwater as a water source.

The invention discloses a fluidized bed hydrogenation method. According to the invention, raw oil and hydrogen gas contact a fluidized bed hydrogenation catalyst, such that a hydrogenation reaction is carried out, and a reaction product is obtained. The fluidized bed hydrogenation catalyst comprises the components of ferric oxyhydroxide, macroporous alumina, organic polycarboxylic acid and a binding agent. The fluidized bed hydrogenation catalyst comprises, with the weight of the catalyst as a standard, 10-50% of ferric oxyhydroxide, 30-80% of macroporous alumina, and 1-20% of the binding agent. The content of organic polycarboxylic acid is 0.05-0.40g/g of ferric oxyhydroxide. According to the catalyst adopted by the invention, cheap ferric oxyhydroxide is adopted as an active metal component, such that the cost is low. The catalyst also has relatively high hydrogenation activity and stability.

The invention relates to the technical field of waste fracturing fluid, in particular to a method for degrading guanidine gum in waste fracturing fluid under the coupling of potassium ferrate and ultrasonic intensification. The method includes the following steps that firstly, the waste fracturing fluid is separated after standing to obtain clear fluid; secondly, absolute ethyl alcohol is added into the clear fluid for purification; thirdly, an alkali regulator is added into the purified guanidine gum solution to regulate the pH value; fourthly, a potassium ferrate aqueous solution is added, meanwhile external-field ultrasonic intensification and oxidization are carried out, and qualified flowback fracturing fluid is obtained. According to the method of deeply oxidizing guanidine gum in the waste fracturing fluid with potassium ferrate under external-field ultrasonic intensification, guanidine gum is deeply oxidized under the coupling of the oxidizing agent and the external-field acting force, and the CODCr value and viscosity of the waste fracturing fluid are effectively reduced; meanwhile, secondary pollution is not generated in the treating process as potassium ferrate serves as the oxidizing agent and is environmentally friendly, and the chroma of the flowback fluid is increased as ferric hydroxide generated after potassium ferrate is reduced has the flocculation and precipitation effect.

The invention relates to a method for inhibiting the release of carbon dioxide caused by the mineralization of organic materials, which belongs to the technical field of resource reuse and comprises the following steps: (1) organic materials are collected, which mainly comprise sludge, pig manure or paddy straw; (2) the organic materials are respectively dried and crashed into 60-mesh powder; (3) according to the proportion that 5ml of 0.2mol/L ferric hydroxide colloid is added to every 10g of dried organic materials, granulation is carried out; and (4) at room temperature, the granules are aired and aged for about 8-15 days to prepare the dry granular products of the sludge, the pig manure or the paddy straw. The method has the advantages of simple operation and low cost; the product prepared by the method can effectively reduce the degradation rate of the organic materials, thus being beneficial for climatic environment protection. The method can be further popularized as a way of large-scale treatment of the organic materials, and the product can be used both as an effective organic material and a soil improvement agent, thereby achieving the effect of killing two birds with one stone.

The invention provides a method for producing an inorganic filling material used for a wood plastic material by titanium gypsum, which belongs to the technical field of comprehensive utilization of solid waste. The method comprises the following steps: directly adding an alkalescence substance during a titanium dioxide production process through a sulfuric acid method, conversing the soluble salt in a titanium gypsum slurry to an insoluble substance, filtering, dehydrating through a high temperature drying process and simultaneously decomposing hydrophilic substances such as dihydrate gypsum, iron hydroxide, aluminium hydroxide in titanium gypsum to form hemihydrate gypsum, iron oxide and alumina with poor hydrophilcity, modifying the surface of the dried titanium gypsum by a coupling agent to increase the lipophilicity, and finally performing ball milling to obtain the modified gypsum powder with particle size less than 800 meshes. The inorganic filling material can obviously increase the hardness and strength of the wood plastic products, effectively reduces the raw material cost of the wood plastic product, and provides a novel effective approach for comprehensive utilization of titanium gypsum.

The invention discloses an improved farmland contaminated soil passivator, a preparation method thereof and a soil remediation method, the passivator mainly aims at heavy metal pollutants Cd and Pb infarmland soil, and the passivator is composed of modified attapulgite, biochar, quick lime and phosphate. The attapulgite is modified, so that the attapulgite is loaded with nano iron oxide or ferrichydroxide core-shell particles, and the adsorption and repair capacity of the attapulgite is enhanced. The repairing technological process is optimized, the adding sequence of passivator components is specifically optimized, and the repairing effect is better.

The invention discloses filter media for removing methyl tert-butyl ether in water, a preparation method thereof and a filter core prepared by the filter media. The preparation method provided by the invention comprises the following steps of: displacing a mixture into a mould pressing machine for mould pressing, sintering at the temperature of 150-250 DEG C for 30-100 minutes, cooling and demoulding to obtain the filter media, wherein the mixture contains, by weight, 250-500 parts of ultrahigh molecular weight polyethylene, 300-500 parts of phenol-absorbed wood-based activated carbon, 10-50 parts of a gas generation agent, and 200-350 parts of limestone particles with ferric oxyhydroxide coated on the surface. The ultrahigh molecular weight polyethylene, the phenol-adsorbed wood-based activated carbon and the limestone particles with ferric oxyhydroxide coated on the surface all have a strong adsorption to methyl tert-butyl ether. Therefore, by the cooperation of the above raw materials, the filter core prepared by the filter media can effectively remove methyl tert-butyl ether in water to be processed.

The invention discloses an efficient water quality purification composite material which is prepared from the following raw materials in parts by weight: 6-10 parts of soybean protein, 8-14 parts of hollow glass micro-beads, 5-9 parts of kaolin, 6-8 parts of calcium sulfate, 1-5 parts of aloe, 5-9 parts of hydroxyl-terminated polyester cyclo-polyhydric alcohol, 2-6 parts of a cement mortar solution, 7-11 parts of toluene diisocynate, 2-5 parts of ferric hydroxide, 1-3 parts of an antioxidant, 2-7 parts of ion exchange resin, 2-6 parts of hydroxyapatite and 2-4 parts of gypsum powder. The efficient water quality purification composite material disclosed by the invention has the beneficial effects that the efficient water quality purification composite material can be used for better adsorbing pollutants suspending in water and improving precipitation; meanwhile, the efficient water quality purification composite material is free from secondary pollution, and is simple and safe.

The invention discloses a preparation method of an iron-based composite catalyst for catalytic ozonation treatment of coal chemical wastewater. The preparation method comprises the following steps: activating/pretreating a carrier, preparing a metal precursor solution, loading Fe onto an Al2O3 carrier, and performing oscillating, aging, drying and washing. According to the preparation method, the aluminum oxide is taken as the carrier, urea is taken as a self-sacrifice template, so that iron oxide is loaded on the surface of aluminum oxide, and the existence of urea is beneficial to precipitation of iron on the carrier; when heating is carried out at 90-120 DEG C, urea can be decomposed very slowly to form hydroxyl groups, and the hydroxyl groups are uniformly distributed on the surface and pores of the Al2O3 carrier; then, ferric hydroxide and ferric oxyhydroxide are precipitated on the surface of the carrier. The active substance directly grows on the surface of the carrier, so that the stability and dispersity of Fe are obviously improved, and meanwhile, the loading amount of Fe on the carrier is increased.

The invention belongs to the technical field of permeable reactive walls, and discloses a filling medium for a permeable reactive wall and a preparation method of the filling medium; a mounting rack is mounted, a U-shaped support is fixed in the mounting rack, a filter layer is arranged between the U-shaped support and the mounting rack, and the U-shaped support is internally filled with a medium;the filling medium is prepared, a solid-phase carbon source, a biofilm carrier, activated carbon particles and zeolite are uniformly stirred according to a certain mass ratio, and sieving is carriedout; after stirring and sieving are completed, ferric hydroxide and aluminosilicate are added into the mixture obtained in the step 2 to obtain the filling medium; and the prepared filling medium is added into the U-shaped support according to a corresponding stage, and oxidizing is carried out. A uniform mixture of polyhydroxyalkanoate and ceramsite is used as the filling medium of the permeablebiological reaction wall, the raw materials are easy to obtain, the process is simple, only the polyhydroxyalkanoate and the ceramsite need to be simply and uniformly mixed (the mixture can contain the solid-phase carbon source, the biological membrane carrier, the activated carbon particles and zeolite), and the requirements for operation and management are low.

The invention provides a preparation method of an inorganic filler used in production of a wood-plastic material by utilizing titanium gypsum, and belongs to the technical field of comprehensive utilization of solid waste. The method is characterized in that an alkali substance is directly added in a sulfuric acid method-based titanium dioxide producing process, so as to convert soluble salts in titanium gypsum slurry into insoluble substances; then the insoluble substances are filtered out; in a high-temperature drying process, not only is dehydration realized, but also hydrotropic substances such as dihydrate gypsum, ferric hydroxide and aluminum hydroxide in titanium gypsum are decomposed into hemihydrate gypsum, ferric oxide and aluminum oxide which are relatively low in hydrophilicity; then surface modification is conducted on the dried titanium gypsum with a coupling agent, so as to improve the lipophilicity of the dried titanium gypsum; finally, ball milling is carried out to obtain modified gypsum powder of which the particle diameter is smaller than 800 meshes. The inorganic filler prepared according to the preparation method has the advantages that the rigidity and the strength of a wood-plastic product adopting the inorganic filler can be improved obviously; the raw material cost of the wood-plastic product is reduced effectively; a new effective way is provided for comprehensive utilization of titanium gypsum.

The invention discloses an indoor air odor remover. Each 100 ml of the indoor air odor remover contains the following raw materials of 0.1-10 ml of glacial acetic acid, 0.1-10 ml of ethyl acetate, 0.1-10 ml of lactic acid, 0.1-10 ml of ferric hydroxide colloids, 1-10 ml of bamboo vinegar, 1-20 ml of ivy extracting solutions, 1-20 ml of mint hydrolate, 1-20 ml of seaweed extracting solutions, 1-20ml of silicon dioxide sol, 0.1-1 ml of azone, 0.1-10 g of sodium dehydroacetate, 0.1-10 g of ethylenediaminetetraacetic acid disodium salt, and the balance deionized water by volume. The indoor air odor remover can have the capacity of reducing VOCs released from leather, furniture and rooms, and can effectively reduce indoor air odor.

The invention belongs to the technical field of environmental protection, and provides a method for circularly preparing iron oxyhydroxide from ferric trichloride, wherein the method comprises the steps: using a ferric trichloride solution as a raw material, carrying out replacement reaction on the ferric trichloride solution and an iron source in a reaction tank, and filtering to obtain a high-purity ferrous solution; sequentially carrying out oxygen oxidation, filtration separation and filtration on the ferrous solution to obtain an iron salt solution, and further washing filter residues to obtain a washing solution and iron oxyhydroxide; and respectively sending the ferric salt solution and the washing solution back to the reaction tank, continuously reacting, and circularly dissolving the iron source. The whole process does not consume ferric trichloride, ferric oxyhydroxide is obtained by circularly dissolving the iron source through ferric trichloride and oxidizing with oxygen, the process route is simple and environment-friendly, and remarkable economic and social benefits are achieved.