1477 results about "Iron sulfate" patented technology

The invention relates to a method for recycling lithium carbonate from a lithium iron phosphate waste material, and belongs to the technical field of waste lithium oil battery recycling. The technical problem to be solved by the invention is that a method for recycling lithium carbonate from the lithium iron phosphate waste material is provided. The method provided by the invention comprises the following steps of: roasting the lithium iron phosphate waste material at 500-800 DEG C for 1-4 hours; adding sulfur into the roasted waste material and leaching, and filtering so as to obtain a mixed solution of lithium phosphate, iron phosphate and ferric sulfate; heating the mixed solution to 80-100 DEG C, and adjusting the pH value to 2-2.5, reacting for 1-4 hours, filtering, washing, and drying to obtain iron phosphate; adjusting the pH value of a filtrate obtained by filtering to be 6-7, adding calcium chloride and dephosphorizing, and filtering; and adjusting the pH value of the filtrate obtained by filtering to be 10-12 by sodium carbonate, reacting for 0.5-2 hours, filtering, washing, and drying so as to obtain battery grade lithium carbonate.

A Fe-based catalyst for the Fischer-Tropsch synthesis contains Re2O3, Fe3O4, La2O3, CuO, K2O and SiO2. It is prepared through using oxidant to oxidize partially the ferrous sulfate to obtain the mixed solution of iron sulfate and ferrous sulfate, mixing with the mixed solution of lanthanum nitrate and copper salt, fast depositing by alkaline compound, washing the deposited slurry, adding potassium silicate-water glass solution, and spray drying.

The invention discloses a PFS-PDMDAAC compound coagulant, a corresponding preparation method and an application method. The PFS-PDMDAAC compound coagulant is prepared as the following steps: the PFS dry powder or solution is arranged in a mixing reactor, and water is added to obtain a ferric-salt PFS solution which is stirred under normal temperature and a PDMDAAC colloid is added into the solution; the mixed solution is stirred under normal temperature till the PDMDAAC colloid is completely dissolved to obtain a stable PFS-PDMDAAC. The application of the PFS-PDMDAAC compound coagulant is to adopt the PFS-PDMDAAC compound coagulant for the coagulation treatment to raw water and waste water and sewage and the dehydration treatment to sludge or silt directly or after dilution with water by any proportion. The component structure and content scope of the invention are distinct to guarantee the capability and stability of the obtained PFS-PDMDAAC compound coagulant, and the materials on industrial manufacturing are available. The various functions of the PFS-PDMDAAC compound coagulant can be adjusted during water treatment with high adaptability so as to reduce cost, reinforce coagulation effect and dramatically enhance the quality of obtained water.

The invention discloses a modifying agent for soda-alkalized paddy field soil. The modifying agent is prepared by mixing polyferric sulfate with polyaluminum sulfate according to the weight ratio of 1:(0.6-1.4) and is suitable for modifying severe soda-alkalized soil into a paddy field; and the modifying method comprises the following steps of: applying the modifying agent to the paddy field soil of the field prior to soil preparation, wherein the application rate is 5.6-18 tons per hectare of soil; carrying out normal soil preparation; and soaking and leaching the soil after the modifying agent is sufficiently mixed with the soil. Compared with the polyferric sulfate, the unit cost of the modifying agent for the soda-alkalized paddy field soil disclosed by the invention is reduced by 9.4-15% under the condition that the same effect is maintained; and compared with the aluminum sulfate soil modifying agent, the macromolecular polymer of the modifying agent has a better flocculation effect and higher modifying efficiency, and meanwhile, the concentration of activated aluminum of soil is controlled to be in a low-concentration level, which is harmless to crops.

The invention relates to the technical field of sewage treatment and particularly relates to an industrial wastewater treating agent. The industrial wastewater treating agent comprises the following components in parts by mass: 0.8-3 parts of polyacrylamide, 25-35 parts of aluminium polychlorid, 25-55 parts of alums, 3-8 parts of iron trichloride, 0.8-3.4 parts of polymeric ferric sulfate, 1.2-2.5 parts of a coagulant aid, 2-10 parts of plant fiber, 10-30 parts of coal ash, 0.8-2.5 parts of sodium silicate, 2.5-5 parts of sodium sulfite, 0.5-3.5 parts of sodium hypochlorite, 5-10 parts of hydrogen peroxide, 8-15 parts of a sodium carbonate-sodium bicarbonate buffer system and 10-20 parts of sodium-based bentonite. The treating agent has the beneficial effects of wide treated pollutant range, good effect, wide production raw material source, environmental friendliness, no toxicity, good discharged water quality, short process flow, and high process operating safety. The treating agent disclosed by the invention can treat various kinds of wastewater such as chemical wastewater produced in oil fields, mining, steel, electroplating wastewater, dyes, pesticides, wine-making and chemical engineering, and sanitary sewage, papermaking wastewater, river and lake water, rubbish seeping water, leather-making wastewater, and the like; and the treating agent is good in treatment effect.

This invention discloses a method for synthesizing bio-diesel oil by halogenated oil including the following steps: putting halogenated oil, methyl alcohol and catalyst iron sulfate into a reactor to be mixed and reacted for 2-6 hours to separate the iron sulfate from it after the reaction, then, adding KOH into the container to be mixed and heated for 0.5-2 hours, laying it still or centrifugating and laminating it, the upper layer of which contains methyl alcohol and bio-diesel oil, the lower contains glycerin and KOH, discharging the lower layer to get the upper solution to be vacuum distilled to recover the methyl alcohol to be washed by hot water to be centrifugated and separated to get niger and rough diesel oil to be vacuum-distilled to get refined bio-diesel oil.

A polishing composition for a memory hard disk, which comprises the following components (a) to (d):(a) from 0.1 to 50 wt %, based on the total amount of the polishing composition, of at least one abrasive selected from the group consisting of silicon dioxide, aluminum oxide, cerium oxide, zirconium oxide, titanium oxide, silicon nitride and manganese dioxide,(b) from 0.001 to 10 wt %, based on the total amount of the polishing composition, of at least one iron salt selected from the group consisting of iron nitrate, iron sulfate, ammonium iron sulfate, iron perchlorate, iron chloride, iron citrate, ammonium iron titrate, iron oxalate, ammonium iron oxalate and an iron chelate complex salt of ethylenediaminetetraacetic acid,(c) from 0.01 to 30 wt %, based on the total amount of the polishing composition, of at least one peroxydisulfate salt selected from the group consisting of ammonium peroxydisulfate, potassium peroxydisulfate and sodium peroxydisulfate, and(d) water.

The invention discloses a selenium-rich nutrient solution for a pear. The nutrient solution comprises, by weight, 20 to 30 parts of magnesium sulfate, 5 to 15 parts of zinc sulfate, 10 to 15 parts of copper sulfate, 10 to 25 parts of iron sulfate, 10 to 25 parts of urea, 8 to 15 parts of potassium sulfate, 10 to 15 parts of potassium dihydrogen phosphate and 25 to 40 parts of sodium selenite. Through application of the nutrient solution provided by the invention, selenium content of the pear can be substantially increased, production of the pear is promoted, net weight of fruit is increased, resistance of the pear to insect attack is enhanced, and attack by diseases and insect pests is reduced.

The invention provides a method for processing waste copper/iron-based diamond tool bit. The method comprises the following steps: firstly, electrochemically dissolving the waste diamond tool bit in a sulfuric acid system so that most part of copper and iron are dissolved into the solution, while silver, diamond and the like are enriched into anode mud; secondly, roasting and oxidizing the anode mud and then adding the oxidized anode mud to the sulfuric acid so that the residual most part of copper is dissolved; next, adding the rest undissolved copper, silver and diamond particles to the sulfuric acid solution of hydrogen peroxide for further oxidizing leaching, recovering the diamond particles which are not dissolved, precipitating the silver in the solution by use of the hydrochloric acid and reducing the hydrazine hydrate to generate simple substance silver powder; finally, after displacing copper with iron powder, concentrating and crystalizing the electrolyte to directly prepare iron sulfate heptahydrate. The recovery rate of the copper is above 96%, while the recovery rate of the diamond particles and the silver is above 99%; the industrial-grade iron sulfate heptahydrate is directly produced, the recovery rate of iron is greater than 98%, closed-loop circulation can be realized, the production labor intensity is low and the method is environmental friendly.

The invention discloses a preparation method and application of multifunctional high-water absorption humic acid resin with water conserving, water retention and trace fertilizer sustained-release functions. The preparation method comprises the following steps of chelating borax, zinc sulfate, manganese sulfate, ammonium molybdate, iron sulfate and the like by using a chelating agent, mixing the raw materials at the ratio of sodium (or potassium) humate solution to acrylic acid to cross-linking agent to trace fertilizer being (300-400):(80-100):(1-3):(6-10), adding an initiator, and performing reaction to prepare the high-water absorption humic acid resin. The resin has the water conserving, water retention and trace fertilizer sustained-release functions, and can be applied to the industries of agriculture, forestry, gardening and the like to fulfill the aim of increasing both production and income, and the growth and development requirements of crops can be well met.

The invention discloses an industrial wastewater treating agent which comprises the following components in parts by weight: 15-30 parts of polymeric aluminum silicate-sulfate, 15-30 parts of ferric sulfate, 1-5 parts of polyacrylamide, 1-5 parts of microorganisms, 15-30 parts of potato starch, 3-13 parts of chitosan, 7-17 parts of attapulgite powder, 5-10 parts of tannin, 4-11 parts of kaolin, 20-40 parts of modified vesuvianite, 10-20 parts of calcium hydroxide, 10-20 parts of activated carbon, 5-15 parts of sodium diphosphate, 1-5 parts of sodium hypochlorite and 5-20 parts of lignin. The raw materials of the industrial wastewater treating agent are wide in source, pollutants in the water can be effectively removed, the sewage treatment is thorough, the treatment cost is low, the treating agent does not has toxicity and does not cause pollution, and the treated wastewater meets the national sewage comprehensive emission standard requirements. The preparation method is simple and convenient to produce.

The invention belongs to the technical field of a sewage treatment agent, in particular to a treatment agent of steelmaking waste water. The treatment agent comprises the following raw materials in parts by weight: 25 to 45 parts of polyacrylamide, 5 to 15 parts of sodium hydroxide, 2 to 5 parts of sodium carbonate, 5 to 15 parts of magnesium oxide powder, 10 to 20 parts of polysilicon ferric sulfate, 10 to 20 parts of quaternary ammonium salt lignin flocculant, 20 to 30 parts of sodium base bentonite, 0.5 to 2 parts of amino trimethylene phosphonic acid, 5 to 15 parts of pentasodium diethylenetriaminepentaacetate, 10 to 20 parts of polyaspartic acid, and 12 to 25 parts of polyaluminium chloride. The treatment agent of steelmaking waste water disclosed by the invention is good in treatment effect, obvious in corrosion and scale inhibiting effect, capable of reducing scaling and corrosion effectively, lowering the production cost, high in purity, free of toxicity, and has no influence on operating workers and problems such as secondary pollution after treatment.

The invention discloses a process for preparing battery-grade high-purity nano iron phosphate. The process comprises the steps that the pH is improved by using a titanium dioxide by-product, impurities are removed and a solution is purified by adding iron powder, then ferrous oxidization is performed to obtain ferric iron, the pH of iron sulfate is regulated, ferric ions in the iron sulfate are extracted by adopting di(2-ethylhexyl) phosphoric acid, a washed organic phase is obtained through 5-6 level counter-current extraction, 5-6 level counter-current acid solution washing and 2-3 level counter-current pure water washing, sulfonated kerosene is distilled out, the organic phase obtained after distillation is mixed with a catalyst, reaction is performed at the temperature of 300-320 DEG C for 3-4 hours, and the material obtained after reaction is washed by adding ethyl alcohol and is dried to obtain the high-purity nano iron phosphate. According to the process for preparing the high-purity nano iron phosphate, the high-purity nano iron phosphate can be prepared through the titanium dioxide by-product, the obtained iron phosphate is high in purity, small in particle size and large in specific surface area, the ferro-phosphorus ratio is 0.995-1.01, and the wastewater production amount is small.

The invention relates to a wastewater treating agent, a preparation method and a wastewater treatment method. According to the oil paint wastewater treating agent, the formula comprising a corrosion inhibitor, a scale inhibitor, a sterilizing agent and a flocculating agent is adjusted, and an auxiliary chemical is added, so that the wastewater treatment process is easy to control, the treatment period is short, and the treatment effect is remarkably improved; the wastewater treating agent comprises the corrosion inhibitor, the scale inhibitor, the sterilizing agent, the flocculating agent and the auxiliary chemical; the corrosion inhibitor comprises sodium polyphosphate, calcium gluconate, alkyl epoxy sodium carboxylate, potassium iodide and gelatin; the scale inhibitor comprises trisodium phosphate, tannin, sodium humate, sulfoacid copolymers and TH-0100 type reverse osmosis scale inhibitors; the sterilizing agent comprises potassium permanganate, didodecyl dimethyl dibenzyltinoammonium chloride and nano-zinc oxide; the flocculating agent comprises lignin, chitosan, quaternary amine type cationic starch, polyaluminum chloride , polymeric ferric sulfate and diatomite earth; the auxiliary chemical comprises polyaspartic acid and alky epoxy carboxylate. An experiment result proves that the wastewater treating agent has an excellent effect.

The invention relates to an iron super-micro particle preparation technique, belongs to radiation chemical nanometer material production technique. The technique of the invention is that: nanometer material preparation: obtain iron hydroxide colloid solution by using iron sulfate as raw material and ammonia liquor as precipitant; control the crystal core accumulating speed and the particle size by hydrophilic surface-activator polyvinyl alcohol with isopropyl alcohol as free radical scavenger and in radiation chemistry principles; develop the radiation chemical reaction by the bunch of electrons generated by industrial electron accelerator; the radiated solution produces nanometer triple iron quadoxide which deoxidated with high purity hydrogen to obtain nanometer iron powder. The advantages of the invention are that: simple technical processes, short production cycle, non-pollution, the obtained particles are of uniform diameter and finely divided. The nanometer iron produced in above ways is of higher satiating hard magnetism and coercive force which is applicable on high intensity magnetic recording material..

The invention discloses a denitration catalyst for a wide temperature window under a high sulfur condition and a preparation method thereof. The catalyst is prepared from the following components in percentage by weight of the denitration catalyst: 1wt% of vanadium pentoxide, 6wt% of tungsten trioxide, 5wt% of one of manganese oxide, cerium oxide, ferric oxide without sulfur or ferric oxide with sulfur, and the balance of titanium dioxide. The preparation method comprises the following step: adjusting a commercial V2O5-WO3/TiO2 catalyst by adding traditional metals iron and manganese and rare earth cerium, specifically, in the preparation process of the catalyst, adding ferric nitrate, ferric sulfate, manganese acetate or cerous nitrate to obtain the highly active catalyst which has good SO2 poisoning resistance and has the denitration activity over 80% under the condition that the temperature is 260-420 DEG C in a relatively wide high-temperature region and the SO2 concentration is high (1000ppm).

The present invention discloses a novel sludge dehydrating agent, a preparation method and applications thereof, and belongs to the sludge treatment field, wherein poly aluminium chloride, calcium oxide, ferric sulfate, bentonite, starch, and polyacrylamide are mixed according to a certain ratio, and then drying is performed for 20-40 min at a temperature of 80-100 DEG C to prepare the novel sludge dehydrating agent. According to the present invention, the novel sludge dehydrating agent has the good dehydrating effect, the water content of the dehydrated sludge is 40-50%, the polyacrylamide content is low, the environmental pollution is low, the preparation process is simple, the cost is low, and the novel sludge dehydrating agent is suitable for large-scale sludge dehydrating treatment.

The invention belongs to the field of mineral processing, and specifically relates to a method for extracting valuable metals from high-iron bauxite with step-by-step acid leaching. The technical scheme of the invention is to extract multiple valuable metal elements in minerals with a step-by-step acid leaching method by taking high-iron bauxite as a raw material. The method comprises the following steps of: firstly, leaching the elements of scandium, gallium, iron and the like in the minerals at low temperature by use of low-concentration sulfuric acid; adding the aluminum-containing mineralphase into the first-step leached slag, and crystallizing the first-step leached liquid to obtain ferric sulfate; in the second-step leaching, extracting aluminum in the first-step leached slag underthe pressure leaching condition by use of the first-step leached liquid after iron removal and acid supplement; crystallizing the second-step leached liquid to obtain the aluminum sulfate product, and returning the second-step leached liquid after the crystallization to the first-step leaching for circular use; and after multiple times of circular enrichment of the elements of scandium, gallium and the like in the leached liquid, separating by an extraction method to obtain the scandium and gallium products. In the invention, the comprehensive utilization, acid and water circulation and zero discharge of wastes of the valuable elements in high-iron bauxite are realized through a step-by-step extraction method.

The invention belongs to the technical field of industrial wastewater treatment, and particularly discloses a method for removing arsenic from sulfate acidic wastewater. The method comprises the following steps that 1, the sulfate acidic wastewater is neutralized through a calcium carbonate suspension of 5 wt%-8 wt%, and solid-liquid separation is conducted after neutralization is conducted; 2, neutralized filtrate is neutralized again through a lime milk suspension of 5 wt%-8 wt%, solid-liquid separation is conducted, and more than 98% of the arsenic is removed in the process; 3, ferric sulfate or polymeric ferric sulfate flocculent settling is conducted, and flocculent settling is conducted on the filtrate in the second step to remove the residual arsenic. The method for removing the arsenic from the sulfate acidic wastewater is low in treatment cost and simple in operation condition, and the treated wastewater can reach a corresponding national emission standard; meanwhile, high-concentration arsenic residues can be obtained, and resource recycling or stabilizing or curing of the arsenic is facilitated.

The invention relates to a non-ferrous metal smelting high-arsenic contaminated acid arsenic fixing process which sequentially includes the steps: pre-neutralization, to be specific, mixing iron-containing slag or iron-containing reagents and smelting contaminated acid, controlling Fe/As molar mole ratio, throwing mixed slurry and the contaminated acid into a pre-neutralization tank, performing reaction, controlling the pH (potential of hydrogen) value of solution, thickening pre-neutralization slag slurry to obtain bottom flow, supernate and gypsum slag, and using the gypsum slag as a cementretarder for sales; oxidation, to be specific, supplementing iron sulfate serving as an iron source reagent as required, heating the pre-neutralized supernate, adding hydrogen peroxide serving as an oxidizing agent for oxidation, controlling oxidation-reduction potential, and completely oxidizing trivalent arsenic into pentavalent arsenic; crystal form iron arsenate precipitation arsenic fixing, to be specific, controlling reaction temperature, adding seed crystals, controlling reaction endpoint pH values by adding lime milk, and conveying bottom flow subjected to two-stage arsenic precipitating reaction to a landfill through filter-pressed crystal form iron arsenate solids. The arsenic fixing process has the advantages of simple process, low cost, good treatment effects, low environmentalpollution risk and the like and is applicable to non-ferrous metal metallurgy industries.

The invention relates to the field of fertilizers, and concretely relates to a multielement composite foliar fertilizer. The multielement composite foliar fertilizer is composed of the following substances in percent by mass: 10-20% of urea, 5-7% of diammonium phosphate, 3-5% of potassium sulfate, 0.05-0.15% of ferric sulfate, 0.02-0.04% of zinc sulfate, 0.03-0.05% of sodium molybdate, 0.1-0.3% of borax, 0.03-0.05% of magnesium sulfate, 0.07-0.09% of potassium chloride, 0.07-0.09% of iodoacetic acid, and 1-3% of a plant-growth regulator.

The invention provides a method for separating protein from yellow slurry of bean curd by using a flocculating agent, comprising the following steps: chitosan and one or more than two of the following mixtures (is) are added into the yellow slurry of bean curd as compound flocculating agent: polymerized aluminium trichloride, polymerized iron sulfate and sodium alginate; the total volume of the flocculating agent is 0.1-3mg/mL; the flocculating agent is first stirred and dispersed, then stirred and mixed mechanically for 5-10 min at 20 DEG C, placed still for 10-24h at the temperature between 0-4 DEG C, centrifugated and precipitated, finally, the protein is gained. In the invention, the combination of the chitosan and other flocculating agents is used as the compound flocculating agent, especially the natural giant molecule amphiprotic flocculating agent-chitosan composition is used, and compared with the traditional synthesized high molecule flocculating agent, the chitosan composition is more environmental friendly, the protein recycling rate is high, bigger molecule copolymer can be formed, the flocculating effect is good, the using amount is small, the cost is low, and the recycled protein product has good quality; in addition, the flocculating agent can be used in acid protein drinks or used as protein extender in the industries of baking, meet product, etc.

The invention discloses a method for synthesizing polymeric ferric sulfate, which employs air, oxygen or oxygen-enriched air as an oxidizing agent, uses ferric persulfate, sulfuric acid or waste acid of titanium white by sulfuric acid process raw materials, using acid nitric ferric sulfate as an accelerating agent and synthesizing the polymeric ferric sulfate in an enamel autoclave which is provided with a packed tower, finally, using ferric persulfate to process the oxidation off-gas. The invention has the advantages of low energy consumption, low cost and convenient operation, not only effectively utilizing the industrial waste acid and the industrial waste slag, but also avoiding polluting to the environment.