88 results about "Ferric oxide hydrate" patented technology

The invention discloses a method of deeply purifying heavy metal micro-polluted water body through resin-based nano hydrated ferric oxide, which pertains to the technical field of water environmental treatment. The steps are: nano hydrated ferric oxide granules are supported on cation exchange resin so as to generate the resin-based nano hydrated ferric oxide materials; the water micro-polluted by the heavy metal passes through an absorption column which is filled with the resin-based nano hydrated ferric oxide or the heavy metal micro-polluted water and the resin-based nano hydrated ferric oxide are mixed in a container and then are vibrated before being centrifugally dried; the absorbed resin-based nano hydrated ferric oxide can be desorbed by acid fluid such as HC1or HNO3 solution etc. or can be desorbed and regenerated by EDTA solution. When a great number of cations such as Na<+>, k<+>, Ca<2+>, Mg<2+>, etc. exist in the polluted water, the invention still can reduce and lead the effluent heavy metal concentration to meet safety control standard; when a great number of competitive cations coexist in the heavy metal micro-polluted water, the effluent heavy metal concentration can be reduced to meet the safety control standard with very large treatment capacity.

The invention discloses a nano adsorbent for removing arsenic, stibium and fluorin in wastewater as well as a preparation method and regeneration method of the nano adsorbent, belonging to the technical field of wastewater treatment. The nano adsorbent is prepared by pretreating macroporous cation exchange resin with a conventional method for acid and alkali treatment on new resin at first, and then sequentially carrying out the following processes of: soaking by using ammonium ceric nitrate and a ferrate solution; performing soaking restoration by using a mixed solution containing ferrite and hydrochloric acid; soaking by using a sodium hydroxide solution, and then performing chemical reaction inside a macroporous resin material to generate nano ferric oxide hydrate and ceric oxide hydrate precipitate particles; and drying and dehydrating for 3 hours at 50 DEG C to obtain an adsorbent loaded with nano ferric oxide hydrate and ceric oxide hydrate. The adsorbent disclosed by the invention can be used for eliminating ions including arsenic, stibium, fluorin and the like in heavy metal wastewater and has good selectivity, and the adsorbent loaded with the nano ferric oxide hydrate and ceric oxide hydrate can be regenerated for use after adsorption saturation.

The invention discloses a compound biosorbent capable of greatly improving the capability of adsorbing heavy metal by waste biomasses and a preparation method thereof. The biosorbent comprises following components: particles made of crops or wood wastes and nano ferric oxide hydrate which is loaded on the surfaces of the particles and is 10-100mg/g based on iron. The preparation method of the sorbent comprises the following preparation steps: enabling a Fe (III) solution with a certain mass concentration to slowly pass through an adsorption column filled with particle-form agricultural wastes and sufficiently contacting the Fe (III) solution with solid particles; then drying the solid particles at the temperature of 40-60 DEG C for 2 hours; adding the solid particles into a Na-NaCl mixed solution to be vibrated for 12-24 hours; filtering solid substances and repeatedly washing by using 0.001M HCl solution and distilled water until the pH value is 6-8; and finally, drying the treated agricultural waste particles at the temperature of 40-60 DEG C for 12-24 hours to obtain a needed material. According to the compound biosorbent, the adsorption capacity can be increased by 2-6 times, the adsorption speed can be increased by 2-5 times and the distribution coefficient of representation adsorption selectivity is increased by 10-50 times.

The invention belongs to the technical field of the harmless treatment of dangerous solid waste and particularly relates to a method for stabilizing fly ash from refuse incineration by the combination of complementary type medicaments. The stabilizing method combines a reducing inorganic medicament (I type medicament) capable of precipitating and absorbing Pb, Zn, Cd, Hg, Cr, Cu and other heavy metals and an heavy metal ion precipitation type organic chelating agent (II type medicament). The method comprises the following steps: firstly mixing the I type medicament with the fly ash first in aqueous solution or in the presence of water for reaction to generate ferric hydroxide for absorbing and precipitating heavy metals or generating sulfides of the heavy metals to precipitate the heavy metals; and then adding the II type medicament in the system to allow the II type medicament to further generate precipitate type chelates with the residual heavy metals, particularly Pb, Cd, Hg and the like. The first step of the method is characterized in that reducing atmosphere still remains after the reaction. As a major part of heavy metals are stabilized by chalybeate or the chalybeate, so the dosage of the II type medicament is reduced considerably.

The invention discloses a method for treating arsenic-containing wastewater, belonging to the technical field of sewage treatment in environmental protection. The method provided by the invention sequentially comprises the following steps of: (1) immersing crushed magnetite powder of 40-100 meshes or magnetite grains with the grain diameter of 5-7 mm in water with the pH value of 7.5-9.5 at a constant temperature of 50-80 DEG C for 5-7 days, and then separating, and drying and activating the immersed magnetite powder or magnetite grains at a temperature of 110 DEG C for 1.5 hours to obtain activated magnetite; (2) acidifying the activated magnetite by using a hydrochloric acid solution with the concentration of 0.1 mol/L and carrying out alkaline washing on the acidified activated magnetite by using sodium hydroxide with the concentration of 2.0 mol/L, and then immersing the alkaline-washed magnetite into an organic amine solution for 12-24 hours; (3) adding 50-100 mg of the activated and modified magnetite powder into 30-800 mL of the arsenic-containing wastewater and stirring for 2.5-3.5 hours; and (4) depositing the stirred mixed liquid and then separating. According to the method disclosed by the invention, amorphous ferric oxide hydrate is generated by hydrolyzing mineral substances including the magnetite and the like, and the amorphous ferric oxide hydrate is aminated in the organic amine solution to form active sites for adsorbing the arsenic after the acidification and the alkaline washing of the amorphous ferric oxide hydrate; the arsenic is easy to combine with an amino so as to be firmly adsorbed on the surface of the magnetite, and the removing rate of the arsenic in the wastewater reaches up to more than 99.9%; and the adsorbed magnetite can be repeatedly utilized after being acidified.

The invention discloses application of a porous ferric oxide/graphene oxide nano-composite material to catalysis of Fischer-Tropsch synthesis. The porous ferric oxide/graphene oxide nano-composite material can be applied to catalysis of Fischer-Tropsch synthesis. The porous ferric oxide/graphene oxide nano-composite material is prepared according to the following steps: (1) preparing a solution ofinorganic iron salt; (2) adding the solution of the inorganic iron salt into hydrosol of graphene oxide to obtain suspension liquid; and (3) performing hydrothermal reaction on the suspension liquidto obtain a ferric oxide hydrate nano-particle and graphene oxide compound, and drying and calcining sequentially. The porous ferric oxide/graphene oxide nano-composite material can be applied to catalysis of Fischer-Tropsch synthesis. The prepared catalyst has high wear capacity (the wear rate is lower than 2%.h<-1>), high CO conversion rate (90 percent), high heavy hydrocarbon C5+ selectivity (50 percent) and high stability.

The invention discloses the aluminum dust dye and preparing method. The dye has emissing ability, and is covered with ferrite yellow. The particle mean size of aluminum dust is 1-100 mum, and the aluminum dust is lack-lustre, golden ocher, and good oxidation resistance. The average emissing ability of infrared band is 0.50-0.60.

The invention relates to an environment-friendly sewage nitrogen and phosphorus removal cleaning agent and a preparation method thereof. The environment-friendly sewage nitrogen and phosphorus removal cleaning agent is characterized in that the cleaning agent contains 40-80 percentage by weight of biological black wood charcoal, 0-20 percentage by weight of hydrated iron oxide, 0-20 percentage by weight of attapulgite and 0-20 percentage by weight of cement on the basis of the total weigh of the cleaning agent. The cleaning agent preparation method comprises the following steps of: (1) uniformly mixing the powdery iological black wood charcoal, the hydrated iron oxide, the attapulgite, the cement and the like by weight percent; and (2) processing the mixture obtained in step (1) into granulates. The cleaning agent provided by the invention has the advantages of large specific surface, suitability for purification of multiple water bodies, reliable purification effect of sewage, low construction cost, convenience for use, environmental friendliness, wide source of raw materials, stable property of basic component materials and contribution to construction of a circular economy pattern.

The invention discloses a method for synchronously removing organic matters and phosphorus in sewage biochemical tail water, belonging to the field of advanced treatment and recovery of wastewater. The method comprises the steps of (a) enabling effluent of a secondary sedimentation tank of a sewage biochemical treatment system to pass through a shallow-layer sand filter, and removing suspended particulate matters in water; (b) enabling filtrate to pass through an adsorption tower filled with a composite material HFO-802; (c) stopping adsorption when the effluent COD or total phosphorus concentration reaches a breakthrough point, performing desorption and regeneration on a nano composite material in the adsorption tower by using a NaOH-NaCl mixed solution, and recycling after regeneration. The method adopts a special adsorption material, and organically combines the adsorption property of a polymer carrier to the organic matters in wastewater and the selective phosphorus removal performance of nano ferric oxide hydrate so as to realize synchronous removal of the organic matters and phosphorus in the biochemical tail water. The method disclosed by the invention is simple in operation process and low in cost, and can be used for providing important guarantees for the advanced treatment and comprehensive utilization of the sewage biochemical tail water.

The invention provides a sewage disposal agent. A preparation method of the sewage disposal agent comprise the following steps: at first, preparing a solution through hybrid heating of FeSO4.7H2O and a polyvinyl chloride hollow sphere, hydrolysis of ferric salt and adding of deionized water, adding strong base in the solution, regulating the pH value to be 7-9, loading on the polyvinyl chloride hollow sphere to form a ferric oxide hydrate, and drying to obtain the sewage disposal agent. The sewage disposal agent can be preferentially combined with filamentous bacteria in sewage and coat the filamentous bacteria to form a reticular structure floc which is not easy to break; rising water flow during the precipitation process has a filtering effect to adsorb small particles and free bacteria which are intercepted in sewage to make sewage clear. Since the sewage disposal agent can preferentially coat the filamentous bacteria, zoogloea is always at an advantage in the substrate competition, which can improve the sewage disposal efficiency and effectively prevent filamentous bacteria sludge bulking.

The independent flow-thru capacitor (FTC) consists of two coaxial wound electrodes and two coaxial wound film layers to constitute one reel, and the center of the reel is one central hole for liquid feeding pipe to insert in to convey fluid to FTC. The active electrode material is nanometer hydrated ferric oxide particle or powder with Fe3O4 as main component. When fluid flows in, the fluid will pass through the channel of the film layers and to whole electrode length. When one DC voltage lower than 1 v is applied, charged matter will be adsorbed, contacted with electrodes and eliminated by the fluid. When water solution of NaCl or CuSO4 or sea water is made to pass through FTC, ion eliminating rate up to 19% may be reached. The FTC of the present invention may be used for reducing waste liquid, purity water and elimiante salt in low cost and simple operation.

A DGT probe and sediment/water interface micro-area detection method using same. A three-layer fixed-glue DGT probe is provided in the invention. The probe includes sliver iodine-Chelex 100 fixed glue composed of sliver iodine glue and Chelex 100 fixed glue, wherein the sliver iodine glue and the Chelex 100 fixed glue are attached tightly to each other. The probe also includes hydrated ferric oxide fixed glue. Internal sides of both the sliver iodine-Chelex 100 fixed glue and the hydrated ferric oxide fixed glue are at least provided with substrates. External side of both the sliver iodine-Chelex 100 fixed glue and the hydrated ferric oxide fixed glue are at least provided with diffusion glue. The hydrated ferric oxide fixed glue is not arranged on the external side of the sliver iodine-Chelex 100 fixed glue. With the fixed glue DGT probe, a detection tool and an evaluation system which are more accurate in deep identification and determination of characteristics of lake phosphorus internal loading are provided and an important scientific basis for lake eutrophication control and water ecological restoration.

The invention provides a method for resource recycling of phosphorus in breeding waste. The method comprises the following steps that (1) pulse ultrasonic treatment is conducted on the breeding waste; (2) the breeding waste treated in the step (1) is introduced into a wet type chemical oxygenizer and oxidized under the action of an oxidizing agent; (3) a magnesium solution and a pH value regulating agent are added into supernate of the breeding waste treated in the step (2), and pulse microwaves are applied to the mixed solution; (4) the mixed solution treated in the step (3) is introduced into a crystallizing bed, bird dung crystal mud and supernate are obtained after the mixed solution is crystallized, and the bird dung crystal mud is collected; and (5) the supernate obtained in the step (4) is introduced into an adsorption column, and ferric oxide hydrate-carried charcoal after adsorption is collected with ferric oxide hydrate-carried charcoal as an adsorbent. According to the method, the pulse ultrasonic and advanced oxidation coupling technique is adopted, and the phosphorus release rate and the organophosphorus conversion rate are high; the bird dung crystal and ferric oxide hydrate-carried charcoal adsorption coupling technique is adopted, and thus phosphorus loss rate is low.

The invention relates to a preparation method of an active carbon fiber phosphorous removal agent loaded with ferric oxide hydrate, belonging to the technical field of preparation process of phosphorous adsorption removal agents. The preparation method in the invention has the characteristics of being short in preparation time, simple in steps, simple and practicable in operation and the like; and the obtained composite adsorbent has the advantages of being uniform in fiber surface load, large in load capability, excellent in adsorption performance, low in preparation cost and the like.

The invention discloses an environment-friendly synthesis method of pigment-grade iron oxide red. The method comprises the following steps: by taking ferric salt or ferrous salt as a raw material, respectively regulating the pH to 7 and 9 so as to respectively prepare amorphous hydrated ferric oxide seed crystal and delta-FeOOH seed crystal; respectively adding the seed crystals in a reaction kettle, so that the concentrations of the seed crystals are 0.0125mol/L and 0.07mol/L respectively; respectively controlling the temperature to 90-95 DEG C and 90-100 DEG C; adding a Fe<2+> ion catalyst (a ferrous chloride solution or a ferrous sulfate solution) to react for 0.5 hour; adding 30g of excess waste scrap iron, introducing air, supplementing a ferrite solution in a reaction process, maintaining the concentration of ferrous ion in the reaction system to 0.16-0.20 mol/L, and reacting for 48-82 hours; and filtering, washing and drying the product so as to obtain the pigment-grade iron oxide red powder with a good pigment property. The environment-friendly synthesis method has no environment pollution and low raw material cost, and process condition is easy to control, thus an effective, practicable and environment-friendly novel method is provided for the industrial production of the pigment-grade iron oxide red.

A process and apparatus is disclosed for converting heavy hydrocarbon feed into lighter hydrocarbon products. The heavy hydrocarbon feed is slurried with a catalyst comprising iron oxide and alumina to form a heavy hydrocarbon slurry and hydrocracked to produce lighter hydrocarbons. Performance of the iron oxide and alumina catalyst is not substantially affected by significant quantities of water on the catalyst.

The invention relates to the field of Fischer-Tropsch synthesis reaction, and discloses a precipitation iron-based Fischer-Tropsch synthesis catalyst and a preparation method thereof. The precipitation iron-based Fischer-Tropsch synthesis catalyst is prepared from Fe, Cu, K, Na and SiO2 according to a weight ratio of 100:(0.1 to 6):(0.6 to 6):(0 to 1):(5 to 24), wherein the Fe mainly exists in thetwo-line hydrated iron oxide phase and is mixed with material phases of alpha-Fe2O3 and gamma-Fe2O3; the Cu, K and Na respectively exist in an oxide form; chemical bond combination Fe-O-Si bridging feature peaks exist between infrared adsorption spectrums 960 to 980 cm<-1>. The precipitation iron-based Fischer-Tropsch synthesis catalyst provided by the invention has higher anti-chemical-abrasionintensity and anti-physical-abrasion intensity. When the catalyst is used for slurry state bed Fischer-Tropsch synthesis reaction, the service life is longer; the selectivity on the long-chain hydrocarbon heavy-weight products (such as C5+ products) is obviously and greatly enhanced; the methane selectivity and the C2 to C4 lighter hydrocarbon product selectivity can be reduced.

Discolored organic compounds (DOC) may be extracted from a medium using a sorbent composition derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxitic ores. In some aspects, the sorbent composition is slurried with the medium. In other aspects, the sorbent composition is formed into pellets or the like, which are contacted with the medium. The red mud (along with adsorbed contaminants) is then separated from the water using any suitable technique, such as filtration, sedimentation, or centrifugation.

The invention relates to an ortho-parahydrogen conversion catalyst used for a liquid hydrogen production and storage device and a preparation method thereof, in particular to a preparation method of asupported ortho-parahydrogen conversion catalyst in which a metal active substance is supported on the surface of a non-metal modified porous carrier. The preparation method of the supported catalystis simple in process, the prepared supported catalyst is high in strength and uniform in particle, catalyst bed flow resistance is effectively reduced, and the acidity of the surface of the porous carrier can be adjusted after the surface of the porous carrier is modified by non-metal ions. The subsequent metal oxide can be more uniformly attached to the surface of the catalyst, so that the activity of the catalyst is remarkably improved compared with that of a traditional ferric oxide hydrate catalyst.