458 results about "Soluble iron" patented technology

A process for leaching laterite ores containing limonite and saprolite. Sufficient mineral acid is added to a slurry of limonite which is leached at atmospheric pressure to dissolve most of the soluble non-ferrous metals and soluble iron. After adding saprolite the slurry is further leached at a temperature above the normal boiling point and at a pressure above atmospheric pressure for a time sufficient to leach most of the contained nickel in the saprolite and to precipitate most of the iron in solution. The pressure of the slurry is then reduced, and nickel and / or cobalt is subsequently recovered from the leach solution by solvent extraction, resin-in-pulp or other ion exchange, sulfide or hydroxide precipitation, or other recovery method.

A wood preservative includes injectable particles comprising one or more sparingly soluble iron salts. The iron-based particles are sufficiently insoluble so as to not be easily removed by leaching but are sufficiently soluble to exhibit toxicity to primary organisms primarily responsible for the decay of the wood. Wood or a wood product may be impregnated with iron-based particles of the invention.

The preparation method of iron phosphate used for preparing lithium iron phosphate material in the present invention relates to heavy metal phosphate, and the steps are: dissolving analytically pure soluble iron salt in distilled water to prepare a 0.05-5M aqueous solution, and the added mass is the iron salt mass 0.01~3% of anionic surfactant, then add analytically pure phosphoric acid according to the molar ratio of Fe3+:PO43-=1:0.8~1.2 and stir evenly, and slowly add alkaline solution with a concentration of 1~9M under stirring , the feeding time is more than 1 hour, until the pH value of the solution reaches 6-7, the iron phosphate precipitate is filtered, and the filtered iron phosphate is washed 3-5 times with distilled water 2-5 times its weight. Dry at ~90°C to obtain the product FePO4·2H2O powder. The iron phosphate product with two crystal waters prepared by the method of the invention has high reactivity, and the performance of the lithium iron phosphate material made by using it is better than that of the lithium iron phosphate material made by commercially available iron phosphate products.

The invention belongs to the technical field of gas purification, and in particular relates to an iron complex desulfurizer suitable for super-gravity desulfurization. The active ingredients of the iron complex desulfurizer are the following components: a soluble iron salt, an iron salt complexing agent, hydrosulfide absorbants comprising alkaline matters and alcamines, and additives comprising astabilizing agent, a synergist, a sulfur granule settling agent and a corrosion inhibitor. The iron complex desulfurizer has the advantages of large accumulative saturation sulfur capacity (reaching 0.60g / L), high absorption speed, high efficiency, stable solution performance without degradation, easy recovery of sulfur, less side reactions, low running cost and the like; and the accumulative saturation sulfur capacity and the absorption speed are obviously improved, so the iron complex desulfurizer is suitable for the characteristics of small liquid circulating volume and short retention time of the super-gravity desulfurization, fully takes the obvious advantages of the super-gravity technology in the wet desulphurization, and is a high-efficiency, economic, practical and environment-friendly iron complex desulfurizer.

The invention provides for methods for producing water-soluble iron oxide nanoparticles comprising encapsulating the nanoparticles in phospholipids micelles. Also provided are methods for conjugating the inventive nanoparticles via functionalized phospholipids to a target molecule, such as an antibody. The invention further provides methods for using the nanoparticle-antibody conjugate of the invention as a contrast agent to image specific cells or proteins in a subject using fluorescent and magnetic imaging techniques.

The invention discloses a high-magnetic heavy-metal ion adsorbent carrying conductive high molecules and a preparation method thereof. The adsorbent comprises high-magnetic microspheres carrying conductive high molecules, each of which comprises a Fe3O4 polycrystal sphere cluster, an amorphous SiO2 protective layer and a polypyrrole adsorption outer layer from inside to outside. The preparation method of the adsorbent is realized in a way that: carrying out a solvent thermal reduction reaction on soluble ferrites to obtain the Fe3O4 magnetic sphere cluster; carrying out the basic hydrolysis by using tetraethoxysilane to obtain the Fe3O4-SiO2 nuclear shell sphere cluster; and finally, carrying out the free radical polymerization reaction on the pyrrole monomers to obtain the Fe3O4-SiO2-polypyrrole functional particles. The heavy-metal ion adsorbent has the characteristics of stable property, high adsorption rate and reproducibility, has favorable adsorption and recovery properties on dichromic ions, and has the advantages of simple preparation process, low material price and no environmental pollution. Compared with the normal chemical absorbent, the product of the invention is convenient to use and achieves the effects of waste water treatment, pollution abatement and environment protection.

A process for leaching laterite ores containing limonite and saprolite. Sufficient mineral acid is added to a slurry of limonite which is leached at atmospheric pressure to dissolve most of the soluble non-ferrous metals and soluble iron. After adding saprolite the slurry is further leached at a temperature above the normal boiling point and at a pressure above atmospheric pressure for a time sufficient to leach most of the contained nickel in the saprolite and to precipitate most of the iron in solution. The pressure of the slurry is then reduced, and nickel and / or cobalt is subsequently recovered from the leach solution by solvent extraction, resin-in-pulp or other ion exchange, sulfide or hydroxide precipitation, or other recovery method.

The invention discloses a repair medicament for compound heavy metal polluted soil. The repair medicament comprises the following components: phosphate compound, soluble ferric salt, magnesium oxide, inorganic clay, an organic chelating agent and silicon dioxide, wherein the phosphate compound adopts one or the combination of phosphate, hydrophosphate or dihydric phosphate. The repair medicament is applicable to compound heavy metal polluted farmland soil, compound heavy metal polluted industrial site soil and compound heavy metal polluted mine site soil. Stirring and mixing of the repair medicament and the heavy metal polluted soil belong to in-site stirring and mixing or off-site stirring and mixing. The repair medicament is short in repair cycle and low in cost, has wide spectrum, and is simple in technical operation.

The invention discloses a modified nanometer nulvalent ferric particle and preparing method with grain size at 20-50nm and even grain size at 30-40nm and specific surface at60-70m<2> / g, which comprises the following steps: allocating soluble ferric salt solution and NaBH4 or KBH4 alcohol-water composite solution with bulk rate at 1: 1-20, adding polyvinyl pyrrolidone in the soluble ferric salt solution according to rate, stirring evenly, adding NaBH4 or KBH4 alcohol-water composite solution in the soluble ferric salt solution, stirring continually until the solution becomes black, adopting magnetic method to select nanometer nulvalent ferric particle, washing through distilled water completely, washing through acetone or alcohol then, reserving in the acetone or alcohol.

The invention relates to the elimination of the arsenic in drinking water, in particular to a preparation method of a supported type nano-adsorbent for removing arsenic from drinking water; the method includes the following steps: (1) activated carbon material with pore volume of 0.100-0.500cm<3> / g is selected for pretreatment; (2) soluble ferric salt solution is firstly used for soaking the activated carbon for 10-120 min; (3) alcoholic solution is taken as a dispersant to be added into the ferric salt solution; (4) under the protection of inert gases at room temperature, a strong reductant, potassium borohydride or sodium borohydride, is used for titrating the ferric salt, and agitation is carried out under the protection of inert gases; after the titration of potassium borohydride or sodium borohydride solution, agitation lasts for 10-120 min; (5) after agitation, centrifugation is carried out; oxygen-free water is firstly used for washing for 1-3 times, then organic solvent is adopted for washing for 1-3 times, and vacuum drying is done at 40-100 DEG C for 12-48h to obtain the product. The adsorbent of the invention has large adsorption capacity and small volume and is safe, stable and easy to store and transport.

The invention discloses a method for preparing nanometer iron particle with a modified liquid phase reduction method. The main steps comprise: preparing soluble ferric salt solution and NaBH4 or KBH4 solution; adding polyethylene pyrrolidone into said soluble ferric salt solution according to a certain proportion, stirring evenly; adding NaBH4 or KBH4 solution into said soluble ferric salt solution under continuous stirring condition, stirring continuously until solution changes into black; selecting nanometer iron particle with magnetic method; washing with distilled water firstly, then washing with acetone or alcohol, storing in acetone or alcohol. The invention needs no nitrogen protective device, process is easy for operation, production cost is low; the distribution of got nanometer iron particle is homogenous (40-80nm), average particle size is 60 nm, specific surface area is 45-56m2 / g, and there is no ferric oxide.

The invention discloses a high specific capacity spindle-shaped ferroferric oxide / carbon nano composite material for a negative electrode of a lithium ion battery. A raw material, namely soluble ferric salt is solved in a mixed solvent of glycerol and distilled water; after low-temperature treatment, precipitates are collected, and a spindle-shaped iron oxide hydroxide (FeOOH) precursor is obtained; and after the precursor is subject to carbothermal reduction, the ferroferric oxide / carbon nano composite material with the same appearance is obtained. The invention discloses a preparation method of the spindle-shaped ferroferric oxide / carbon, which has the advantages that the operation is simple, convenient and simple to do, the used raw material has a cheap price, mass production is facilitated, and the synthetized spindle-shaped ferroferric oxide / carbon nano composite material shows high first time coulomb efficiency and high specific capacity when being used as the negative electrode of the lithium ion battery, and is a promising negative electrode material of the lithium ion battery.

The invention discloses a chelated iron desulfurizer and application method thereof, and belongs to the technical field of gas purification. The chelated iron desulfurizer comprises the following components: soluble iron salt, an iron salt chelating agent, a sulfide absorbent, a stabilizing agent, a composite particle settling agent, and a multifunctional corrosion inhibitor; wherein the mole ratio of Fe<3+> to Fe<2+> in soluble iron salts is 1:3-5:1; the mole ratio of chelating agent to iron salts is 1.2:1-3:1, and the pH value of the solution is 8.0 to 9.5. The chelated iron desulfurizer is used to remove sulfur under the assistance of a hyper-gravity technology; the desulfurization efficiency is high, the work sulfur capacity is high, the performance of the desulfurizer is stable, and the oxidation regeneration performance is good. The hyper-gravity chelated iron desulfurization technology has the advantages that the technology is simple, the mass transfer efficiency between gas and liquid is high, the equipment is small and can be easily assembled or disassembled, and the technology can be used to remove H2S from natural gas or associated gas in an offshore oil and gas platform.

Methods for improving surface roughness of an environmental barrier coating including providing a component having a plasma sprayed environmental barrier coating; applying a slurry to the environmental barrier coating of the component, the slurry being a transition layer slurry or an outer layer slurry; drying the environmental barrier coating having the applied slurry; and sintering the component to produce a component having an improved surface roughness where the slurry includes a solvent; a primary transition material, or a primary outer material; and a slurry sintering aid selected from iron oxide, gallium oxide, aluminum oxide, nickel oxide, titanium oxide, boron oxide, alkaline earth oxides, carbonyl iron, iron metal, aluminum metal, boron, nickel metal, iron hydroxide, gallium hydroxide, aluminum hydroxide, nickel hydroxide, titanium hydroxide, alkaline earth hydroxides, iron carbonate, gallium carbonate, aluminum carbonate, nickel carbonate, boron carbonate, alkaline earth carbonates, iron oxalate, gallium oxalate, aluminum oxalate, nickel oxalate, titanium oxalate, solvent soluble iron salts, solvent soluble gallium salts, solvent soluble aluminum salts, solvent soluble nickel salts, solvent titanium salts, solvent soluble boron salts, and solvent soluble alkaline earth salts.

The invention discloses a method for preparing a supported iron oxide series desulfurizing agent. The preparation method comprises the following steps: a) preparing soluble iron salt solution and alkali solution; b) putting a porous material serving as a carrier into the soluble iron salt solution prepared in the step a), and soaking under the condition that the pressure is less than 3MPa and not equal to normal pressure; c) drying the carrier soaked in the step b) at the temperature of between 30 and 85 DEG C for 1 to 24 hours; d) putting the dried carrier obtained in the step c) into the alkali solution, and soaking under the condition that the pressure is less than 3MPa and not equal to normal pressure; e) drying or draining the carrier obtained in the step c), and eluting the carrier by using water of 20 to 80 DEG C till the eluted water has no negative ions; and f) drying the carrier obtained in the step e) for 1 to 24 hours at the temperature of between 30 and 85 DEG C to obtain the desulfurizing agent. The desulfurizing agent prepared by adopting the method has the advantages of high accumulative sulfur capacity, high mechanical strength, abrasion resistance and the like, is easy to regenerate, and is widely applied in the fine desulfuration process of petroleum industry, chemical industry and the like.

The invention relates to a hair dye, especially a natural plant hair dye. Wherein, it is formed by mixed A and B solutions; A agent is formed by agent and metal chelant, while the agent can be guar gum, polyquaternary ammonium salt or glycol cellulose, and the chelant can be soluble ferric salt or ferrous salt; B agent contains pomegranate bark extractive and glycol cellulose; while it also can contain logwood extractive as color agent. The invention has short dye time, uniform dye and washing resistance, nearly without side effects.

The invention discloses a method for preparing lithium iron phosphate serving as a positive active material of a lithium battery, and relates to a method for preparing lithium iron phosphate serving as a positive active material of a high-power lithium ion secondary battery by adopting a sol self-propagation method. The method is characterized by comprising the following preparation processes: manufacturing sol by using soluble iron salt, lithium salt, phosphoric acid, complexing agent and doped metal source and carbon source precursors as raw materials, concentrating the sol, and then initiating self-propagation combustion at the temperature of between 650 and 750 DEG C to synthesize olivine-type pure lithium iron phosphate, doped lithium iron phosphate or composite powder of carbon and one of the olivine-type pure lithium iron phosphate and the doped lithium iron phosphate. By using the method of the invention, the self-propagation combustion is directly initiated at the background temperature of between 650 and 750 DEG C in the non-oxidizing atmosphere without a gel process, so high-performance lithium iron phosphate powder with controllable components, uniformity and fine grains in 3 to 60 minutes can be obtained, wherein the lithium iron phosphate powder can be used as the high-quality positive material of the secondary lithium battery. The method can be used for batch production.

The invention relates to an in-situ preparation method for a functional nullvalent nanometer iron / polyelectrolyte composite fibrofelt. The method comprises the following steps: (1) preparing polyelectrolyte mixed solution with concentration between 7 and 12 percent by polyacrylic acid PAA, and preparing a nanometer fibrofelt according to a principle of electrostatic spinning; (2) carrying out heat treatment on the nanometer fibrofelt to prepare a water-fast polyelectrolyte fibrofelt; (3) preparing soluble iron salt solution, and preparing reducing agent solution with concentration 4 to 6 times of the iron salt solution; (4) dipping the (2) in the iron salt solution; (5) rinsing; (6) dripping the reducing agent solution onto the complex iron ion fibrofelt; (7) rinsing by deionized water; (8) drying and storing. In the fibrofelt prepared by the method, nanometer iron particles are dispersed evenly without aggregation phenomenon, and the fibrofelt can effectively fix nanometer iron particles, thereby ensuring effective recycle of the nanometer iron particles in practical application without secondary pollution.

The invention relates to a preparation method of a supported type denitration catalyst. The preparation method comprises the following steps of: adopting soluble iron salt and cerate as active components, adding water for dissolving and mixing to prepare mixed solution; adding corresponding carriers into the mixed solution, dipping, dripping an alkaline precipitating agent till the pH is equal to 9-10, precipitating completely, then filtering, and cleaning to obtain a filter cake; putting the filter cake into a microwave experiment table for microwave treatment, then drying, finally calcining, and activating to prepare the catalyst. The catalyst prepared by the invention has the advantages that a denitration temperature window is wide, the low-temperature denitration activity is good, the energy consumption of the preparation method is low, and the preparation of the denitration catalyst is reduced.

A method, system and apparatus for treating water is provided including a treatment mode comprising the steps of drawing said water from a pressurized water source through a controlling device to a treating vessel, the water inlet of said treating vessel being substantially at the top of a treating vessel, contacting said water with pressurized air present at the top of said treating vessel to release substantially all hydrogen sulfide and offensive odors present in the water and to dissolve oxygen in the water which reacts with soluble iron in the water to form ferric oxides, flowing the water through a filter bed of calcite mineral to remove substantially all sediment present in the water and to neutralize the ph of the water and to remove substantially all the ferric oxides from the water, the ferric oxides fastening to the calcite minerals and to already fastened ferric oxides, flowing the water to a final media means and to the outlet of the treating vessel.

The invention discloses a ferric-carbon biologic particle and a preparation method and application thereof. The preparation method of the ferric-carbon biologic particle comprises the following steps: 1) drying, smashing, pyrolyzing, grinding, sieving and washing forestry and agricultural residues to obtain charcoal; 2) soaking the charcoal in a NaOH solution to perform surface activation treatment; 3) sequentially utilizing a polyethyleneimine / ethanol solution and a glutaric acid solution to treat the charcoal with the surface activated to obtain a charcoal particle with amino grafted on the surface, 4) dispersing a soluble molysite solution or a ferrite solution into absolute ethyl alcohol, adding the charcoal particle and a NaBH4 solution, loading nanometer zero-valent iron generated in reaction on the charcoal particle to obtain the ferric-carbon biologic particle. The ferric-carbon biologic particle is good in dispersibility, high in load rate of the nanometer zero-valent iron, good in soil remediation effect, stable in effect, simple in preparation technology, low in energy consumption, low in cost, economical, practical and suitable for being widely used as a remediation material of soil which is polluted by heavy metal.

The invention discloses a synthesizing method, a preparation method and application of a Fe-N-C oxygen reduction catalyst. The synthesizing method comprises the following steps that 1, a carbon-nitrogen precursor, a morphology control agent and soluble ferric salt are added into water, heating and stirring are conducted for reacting, suction filtration is conducted after reacting is complete, and drying is conducted to a solid substance; 2, the solid substance obtained in the step 1 is calcined to obtain a catalyst precursor; 3, the catalyst precursor obtained in the step 2 is treated with acid to obtain the Fe-N-C oxygen reduction catalyst. According to the Fe-N-C compound synthesized through the method, the microstructure is a novel multi-layer-steamed-bread-similar structure formed in the mode that a large quality of nanotubes are wound into laminates, and then the laminates are mutually stacked; in addition, due to the fact that Fe metal particles with active centers are wrapped in the nanotubes, the obtained Fe-N-C oxygen reduction catalyst has the good stability and activity.

The invention discloses a catalyst for preparing yellow phosphorus through catalytic decomposition of phosphine gas and a preparation method thereof, and belongs to the technical fields of the discharge control technique for industrial tail gas pollutants and phosphine tail gas resource comprehensive utilization. The catalyst is characterized in that the catalyst takes fe-ni alloy containing M element or free of the M element (the M is boron or phosphorus) as an active component, takes a natural halloysite nanotube as a carrier, and has the advantages of being low in cost, high in activity, good in selectivity and the like. The preparation method includes taking soluble ferric salt and nickel salt, the natural halloysite nanotube, the compound containing the M element or free of the M element as the raw materials; and generating active components which are evenly loaded on the carrier in a nano particle form after processes of impregnation, evaporation, drying, calcinations, hydrogen reduction and the like. The preparation method is simple in process, low in cost, mild in conditions and free of pollution. According to the catalyst and the method, phosphine gas can be subjected to catalytic decomposition with a high efficiency and a low cost, and remarkable environmental and economical benefits are provided.

The invention discloses a nano-loading zero-valent-iron-based PVDF (Polyvinylidene Fluoride) compound material as well as a preparation method and application thereof. The main preparation method comprises the following steps of: (1) pretreating a PVDF microfiltration membrane; (2) functioning the PVDF filter membrane by taking acrylic acid (AA) as a functional monomer; (3) respectively immersing the functioned PVDF filter membrane into sodium salt and soluble iron salt solutions for ion exchange, loading iron ions on the functioned PVDF filter membrane; and (4) immersing the PVDF filter membrane into a borohydride salt solution so as to prepare the nano-loading zero-valent-iron-based PVDF compound material under the strong reduction action. By respectively repairing simulative dyeing wastewater, heavy metal wastewater and anionic organic wastewater at the room temperature through using the reduction function of the material, the nano-loading zero-valent-iron-based PVDF compound material as well as the preparation method and the application thereof disclosed by the invention are conveniently and simply operated and easily recycled, have the advantages of low cost and good dispersity of nano iron particles, and are capable of reducing ecological risks caused by that the nano iron particles flow into water so as to improve the service cycle of the compound material. The nano-loading zero-valent-iron-based PVDF compound material can be regarded as an environment-friendly environment restoration material.

The invention relates to a preparation method for a manganese dioxide hollow sphere, which is as follows: manganese sulfate, potassium permanganate and soluble ferric salt are weighed and added into a hydrothermal reactor; deionized water is added till manganese sulfate, potassium permanganate and soluble ferric salt are dissolved; the mixed liquor is fully mixed and added with sulfuric acid; the molar ratio of manganese sulfate, potassium permanganate, soluble ferric salt and sulfuric acid are 1:6:0.04-1:36.8; the hydrothermal reactor is put in a baking oven, hydrothermally reacted for 10 to 1440 minutes in the constant temperature of 130 to 180 DEG C and naturally cools to the room temperature; the prepared product is washed for five times by deionized water, and dried in the 50 DEG C of the air of the drying oven to prepare manganese dioxide hollow sphere. The prepared manganese dioxide hollow sphere is tested by an x-ray diffraction instrument, a scanning electron microscope and a transmission electron microscope, has spherical appearance, big cavity, about 3mu m p grain size distribution, big specific surface area, and can be used as electrode material and battery material of a super capacitor.

The invention relates to food additive silica gel and a production process of the food additive silica gel, belonging to the technical fields of food additive silica gel and the production process of the food additive silica gel. The food additive silica gel is silica gel with a three-dimensional spatial reticular structure and an X-ray amorphous material, with the soluble iron ion content being less than 2ppm, the granularity median value being controlled to 14-16mum, granules less than 10mum being controlled to below 15%, the specific surface area being greater than 450 m<2> / g, the pore volume being greater than 1.2ml / g, and the average pore diameter being equal to or greater than 10nm. The production process of the food additive silica gel comprises the steps of: (1) raw material preparation; (2) reaction to prepare gel; (3) aging to remove iron and enhance activity; (4) washing; (5) instantaneous drying; and (6) grinding and size grading. The food additive silica gel provided by the invented is reasonable in granularity median value control and large in specific surface area and pore volume, has the soluble iron content being less than 2ppm, and can effectively adsorb proteins easy to haze, effectively improve the quality and the shelf life of beer as the effective grain size distribution in the silica gel is concentrated and the content of the granules less than 10mum is low, and ensure the filtration velocity of the beer so as not to affect the production capacity of the beer.

The invention relates to the technology of air and water purification, and discloses a nano-iron and graphene compound purification material and a preparation method and the application of the nano-iron and graphene compound purification material. According to the nano-iron and graphene compound purification material, graphene serves as a base body, the base body is loaded with nano-iron and nano-sliver, and the nano-iron and graphene compound purification material comprises, by mass, 20-80% of the nano-iron, 1-2.5% of the nano-silver and 79-17.5% of the graphene. After a soluble iron compound and a soluble sliver compound are mixed to form an aqueous solution, then oxidized graphene powder or an oxidized graphene aqueous solution is added and stirred to enable iron ions and sliver ions to be fully exchanged or be adsorbed on oxidized graphene, then a combination body is obtained, and the oxidized graphene with the iron ions and the sliver ions is obtained; the oxidized graphene with the iron ions and the sliver ions is filtered to remove a residual solution, and is aired and dried after being washed; the dried oxidized graphene is sintered and then is cooled in a furnace so as to obtain the nano-iron and graphene compound purification material. The nano-iron and graphene compound purification material can be coated on other filter media to be used.

The invention relates to a preparation method and application for a supported catalyst based on iron and molybdenum. The supported catalyst based on iron and molybdenum is prepared by simultaneously introducing soluble iron salt and a molybdenum salt precursor in the process of preparing a titanium silicate molecular sieve (TS-1), so accurate control of distribution of two active components of Fe2(MoO4)3 and MoO3 in the channels of the TS-1 is realized. The TS-1 is used as a carrier, is a highly-efficient oxidation catalyst at the same time, and forms a synergistic effect with iron and molybdenum components. According to the invention, by using of the catalyst provided by the invention, highly-efficient conversion of methanol can be realized under the conditions of normal pressure, a reaction temperature of 250 to 400 DEG C, an inlet methanol volume content of 0.5 to 15% and a carrier space velocity of 5000 to 25000 h<-1>. The preparation method provided by the invention has simple operation, facilitates amplification, can be applied to the fields of production of formaldehyde by methanol oxidation, etc., and has good industrial application prospects.