91 results about "Ferrous ammonium sulfate" patented technology

A corrosion-inhibited fire retardant composition is provided that comprises at least one ammonium polyphosphate, at least one suspending agent, at least one phosphonate selected from a group consisting of aminotri(methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, hexamethylenediaminetetra(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid), salts thereof, and mixtures thereof and a corrosion inhibiting system. The corrosion inhibiting system is comprised of at least one corrosion inhibiting compound selected from a group consisting of azoles, insoluble ferric pyrophosphate, soluble ferric pyrophosphate, ferrous oxalate, ferric citrate, ferrous sulfate, ferric ammonium citrate, insoluble ferric orthophosphate, soluble ferric orthophosphate, ferric ammonium oxalate, ferric ammonium sulfate, ferric bromide, ferric sodium oxalate, ferric stearate, ferric sulfate, ferrous acetate, ferrous ammonium sulfate, ferrous bromide, ferrous gluconate, ferrous iodide, ferric acetate, ferric fluoroborate, ferric hydroxide, ferric oleate, ferrous fumarate, ferrous oxalate, ferrous oxide, ferric lactate, ferric resinate, and any combination thereof. Methods of making and using the same are also described. In addition, agricultural plant nutrients comprising the same are provided.

Corrosion-inhibited fire retardant compositions and methods of making and using the same are provided. The corrosion-inhibited fire retardant compositions are comprised of at least one fire retardant component, at least one biopolymer having a particle size diameter of less than about 100 microns, and a corrosion inhibiting system. The corrosion inhibiting system is comprised of at least one corrosion inhibiting compound selected from a group of compounds including azoles, insoluble ferric pyrophosphate, soluble ferric pyrophosphate, ferrous oxalate, ferric citrate, ferrous sulfate, ferric ammonium citrate, soluble ferric orthophosphate, insoluble ferric orthophosphate, ferric ammonium oxalate, ferric ammonium sulfate, ferric bromide, ferric sodium oxalate, ferric stearate, ferric sulfate, ferrous acetate, ferrous ammonium sulfate, ferrous bromide, ferrous gluconate, ferrous iodide, ferric acetate, ferric fluoroborate, ferric hydroxide, ferric oleate, ferrous fumarate, ferrous oxide, ferric lactate, ferric resinate and any combination thereof. In a specific embodiment, the corrosion-inhibited fire retardant composition includes a xanthan biopolymer.

The present invention discloses a repairing agent of a saline alkali land for planting cotton. The components in the formula of the repairing agent comprise, by weight, 28-44 parts of desulfuration gypsum, 20-35 parts of a microbial agent, 5-11 parts of polyacrylate potassium, 25-45 parts of silica, 16-32 parts of sodium-based bentonite, 3-7 parts of sulfur, 8-19 parts of soluble humic acid, 4-12 parts of ferrous ammonium sulfate, and 8-17 parts of amino acid powder. According to the present invention, with the added soluble humic acid, the added ferrous ammonium sulfate and the added amino acid powder, the soil can be further improved, the growth environment of the cotton can be improved, the salt rejection rate of the soil can be increased, and the growth of the cotton can be promoted; and the rich raw materials are used to replace the single raw material in the traditional repairing agent, such that the repairing time of the saline alkali land can be substantially shortened, and the repairing agent and the repairing method can be widely promoted and used.

The invention provides a method for preparing micaceous iron oxide, which has the advantages of controllable grain size and color change, high purity, complete and reliable production process, easy operation and high resource utilization rate, by a molten salt growth method. In the method, ammonium ferrous sulfate or ferrous sulfate or a mixture of ammonium ferrous sulfate and ferrous sulfate serving as an iron source and sulfates or chlorides or a mixture of sulfates and chlorides serving as a fluxing agent are mixed and melted to form the micaceous iron oxide, wherein the main component of the micaceous iron oxide is a-Fe2O3. The method has the advantages of low cost, easy operation, complete process, no toxicity, high chemical stability, high purity, high crystallinity, high heat resistance, easy realization of industrialization and the like.

The invention relates to a water gel modified anti-protein pollution ultrafiltration membrane and a preparation method thereof. Vinyl materials (CH2=CH(CONH2)n, wherein n is greater than 1 but smaller5) containing multiamides groups at the lateral chain are used as monomers; ferrous ammonium sulphate are used as polymerization inhibitors; water and methanol are used as solvents; through ultraviolet radiation grafting, a gel layer with hydrophilicity is obtained on the surface of the PVDF ultrafiltration membrane. The initial contact angle of the modified membrane surface is reduced to 55 degrees from the initial 120 degrees, and can reach 0 degree in 10 to 12s; the water flux restoration rate can reach 90 to 99 percent. The surface of the prepared separation membrane has excellent anti-protein pollution capability; the biocompatibility is relatively good. Compared with a conventional method of coating water gel onto the surface of the membrane, the method has the advantages that the gel layer grafted onto the surface of the membrane has more excellent stability; the preparation method is simple; the addition of chemical crosslinking agents is not needed; the performance is stable;the cleaning is easy.

A method for determining chromium content in a tungsten matrix with singly or simultaneously added chromium and vanadium, characterized in that a test sample is subjected to melting with sodium peroxide and hot water leaching; meanwhile said sodium peroxide is also used as an oxidizing agent to oxidize all the chromium to high valences; the main body of tungsten is coordinated by ammonium hydrogen fluoride to prevent tungstic acid from precipitating; precipitation and turbidity are avoided throughout the analysis, titration can be carried out in a quite clear condition with accurate and reliable results. In this invention, the clearness of the solution when titrating is very important for the accuracy of titrimetric analysis; the solution is always clear throughout the determination, ensuring that the interference with determination of chromium from vanadium is accurately and quantitatively eliminated; the interference from vanadium is eliminated by subtraction method, by means of titrating with ferrous ammonium sulfate standard solution after oxidation with potassium permanganate. In this invention, the determination method allows the determination to be carried out in the quite clear condition, and eliminates the interference from vanadium completely and quantitatively, thus the accuracy and speed of the determination of chromium content in a tungsten matrix with singly or simultaneously added chromium and vanadium are improved.

The invention discloses an adhesive for a corrugated cardboard and a preparation method, and belongs to the technical field of cardboard manufacturing. The adhesive for the corrugated cardboard comprises, by weight: 30-40% of plant starch, 1-2% of an epoxy resin, 0.1-0.5% of a toughening agent, 0.4-0.8% of a sodium hydroxide solution, 0.5-0.8% of carboxymethyl cellulose, 0.5-1% of an antiseptic, and 0.01-0.02% of ammonium ferrous sulfate, with the balance being water. The adhesive for the corrugated cardboard has advantages of high bonding speed, firm bonding, quick drying, gelation simplicity, and easy and uniform application. The adhesive is simple to prepare and convenient to use; the manufacturing efficiency is high; and the cost is low. The adhesive does not precipitate and mould, and is stable in quality and long in service life. The firmness of the prepared corrugated cardboard can reach 5-6 kg/cm. The invention also discloses a preparation method of the adhesive for the corrugated cardboard.

The invention relates to a determination method for the content of silicon in a high strength aluminum welding wire. The content of silicon in the high strength aluminum welding wire is determined by a spectrophotometric method. The determination method comprises the following steps: (1) sampling; (2) adding water and sodium hydroxide, heating until the sample is completely and clearly dissolved, and cooling; (3) acidizing; (4) heating to boil, removing nitrogen oxides, cooling, and diluting; (5) dividing the sample solution into colorimetric tubes, adding nitric acid and ammonium molybdate solution, and performing water bath; (6) cooling by running water, adding sulfuric acid-ammonium oxalate solution and ferrous ammonium sulphate solution, diluting with water to the mark, and shaking uniformly; (7) preparing a reagent blank along with the experiment; and (8) drawing a standard curve; determining an absorbance, and calculating a numerical value by the standard curve. A spectrophotometer is used for successfully determining the mass content of silicon in the high strength aluminum welding wire, a determining range of the mass content is 1.00% to 7.00%, and the accuracy is comparable to that of a gravimetric measurement method. The method saves a lot of analysis time and also increases silicon measurement method types.

The invention relates to a remedy method for the mistakes in vanadium content determination with ammonium ferrous sulfate volumetric analysis, which comprises the following steps: the vanadium in the solution to be test that is over-titrated or is titrated insufficiently is oxidized to be V5+ with potassium permanganate, while the chromium in the solution is not oxidized; the excessive potassium permanganate is deoxidized with sodium nitrite with the existence of urea; meanwhile, the excessive sodium nitrite is also decomposed with the existence of urea, thus the interference of excessive sodium nitrite to titration is eliminated; then n-phenylanthranilic acid is used as indicator and the vanadium is re-titrated with ammonium ferrous sulfate standard solution. The invention corrects the titration mistakes in vanadium content analysis operation, wherein, the mistakes results from the concentration of the chosen ammonium ferrous sulfate titrating solution does not matched with the vanadium content in the sample, or titration end-point is judged inaccurately, or other reasons. Compared with the prior international standard, the invention has the advantages of enlarged determination range, reduced reworking rate in operation, and better service for scientific research and production. The invention is suitable for vanadium content determination in sample of total vanadium content more than 1.00% and chromium content less than 1.00%.

The invention discloses a cultivation method for pleurotus eryngii and belongs to the cultivation field of pleurotus eryngii. The method comprises the following parts: straw, bean dregs, coal ashes, lime, ammonium ferrous sulfate, cottonseed casing, wood chips, cinnamyl acetate, orange peel powders, biogas residues and water. The method comprises the following preparation steps: A, adding straw, bean dregs, wood chips, orange peel powders and biogas residues into water, stirring and standing the mixture to obtain a mixed solution; B, adding coal ashes, lime, cottonseed casing, cinnamyl acetate and ammonium ferrous sulfate into the mixed solution obtained in the step A, and stirring the solution to make the solution to be pasty; C, machining the pasty solution into a cylinder and drying the cylinder at the temperature of 100-120 DEG C to obtain a pleurotus eryngii medium. According to the technical scheme of the invention, the compositions of the medium are extensive in source, low in cost and easily obtained. Cultivated pleurotus eryngii is good in growth vigor and obviously shortened in cultivation period. Therefore, the method is suitable for large-scale production.

The invention discloses a method capable of accurately measuring chemical oxygen demand in water. Accurately absorb 10.00mL of potassium dichromate standard solution into a 500mL conical flask, add water to dilute to about 110mL, slowly add 30mL of concentrated sulfuric acid, and add 3 drops of test Ferrous spirit indicator solution, titrate with ferrous ammonium sulfate solution, the color of the solution changes from yellow to blue-green to reddish brown as the end point; add 5g of silver sulfate to 500mL of concentrated sulfuric acid; take 20.00mL of uniformly mixed water sample and place it in 250mL Accurately add 10.00mL potassium dichromate standard solution and a few small glass beads or zeolite to the ground-mouth reflux conical flask, connect the ground-mouth reflux condenser, and slowly add 30mL sulfuric acid-silver sulfate solution from the top of the condenser Get 20.00mL double distilled water, do blank test according to the same operation steps, record the consumption of ferrous ammonium sulfate standard solution when titrating the blank, you can get the chemical oxygen demand in the water. The method can accurately measure the chemical oxygen demand in water, determine whether it meets the requirements of environmental protection, and avoid direct discharge into the environment to cause environmental pollution.

The invention relates to a method for preparing an electrode material of a lithium-ion-mixed capacitor. The method comprises: a water solution having ammonium ferrous sulfate and iminodiacetic acid is placed in a reaction still, reaction is carried out under a certain temperature, and a precursor Fe-IDA is generated; the precursor Fe-IDA is cleaned and dried and then is placed in a tube furnace with argon protection, an annealing experiment is carried out to obtain a negative electrode material Fe3O4@C; the negative electrode material is corroded in a dilute acid solution, thereby obtaining positive-material porous carbon; and the positive electrode, the negative electrode, and a diaphragm are arranged in a button battery, the button battery is placed into a lithium hexafluorophosphate solution as an electrolyte, and packaging is carried out to obtain a lithium-ion-mixed capacitor. According to the invention, the negative electrode material and the positive electrode material of the lithium-ion-mixed capacitor are prepared by one way, so that problems of long preparation time, high cost, and compatibility of capacities and volumes of the positive electrode and negative electrode can be solved. The prepared lithium-ion-mixed capacitor has advantages of wide operating voltage range, excellent performances, high energy density, and ultra-high power density.

A high molecular weight cationic polyacrylamide chemical polymerization method, the weight of each polymerization component is: solid acrylamide monomer: 490-520kg; DAC cationic monomer: 104-124kg; deionized water: 1356-1956kg; : 1.6-2.0kg; ammonium persulfate: 10-14g; ferrous ammonium sulfate: 6-10g. Ammonium ferrous sulfate with a stable chemical structure is selected as an auxiliary agent for reducing the activation energy of the polymerization reaction. Make the polymerization reaction occur in a large amount at a relatively low temperature, even in the case of low temperature in winter, the polymerization reaction can be completed in about 4 hours, the production is smooth, the molecular weight of the product is stable, and the product has good solubility in water.

The present invention is a kind of preparation method of oil well cement filtrate reducer, comprising the following steps: (1) dissolving lignin in deionized water, adding redox initiator ferrous ammonium sulfate and hydrogen peroxide, feeding nitrogen to initiate; ( 2) Weigh two anionic monomers of acrylic acid and sodium p-vinylbenzenesulfonate, dissolve them in water and adjust the pH to 6-7, add potassium persulfate as an initiator, and feed nitrogen to initiate; (3) Mix the lignin monomer and two kinds of anionic monomers, add aluminum citrate cross-linking agent and continuously feed nitrogen to carry out graft modification; (4) after the reaction is completely finished, add absolute ethanol, demulsify and filter, A solid product was obtained. In the present invention, lignin macromolecules and modified monomers are respectively initiated to increase the grafting rate of the polymerization reaction, and aluminum citrate is used as a crosslinking agent, which is stable and conducive to the production of high-quality products. The method of the present invention is simple and can For a variety of grafting monomers, the feasibility is very high.

Ferrous sulfate and ferrous ammonium sulfate are known to kill moss and liverwort. They impart acidity in the lawn. Moss grows better in an acidic pH. The current invention proposes a formulation of ferrous sulfate or ferrous ammonium sulfate and zero valent iron with lime. Lime neutralizes the acidity produced by the ferrous salt and keeps the pH of the soil at 7 to 7.5. The formulation produces an immediate effect to eradicate moss and also provides a sustained effect over a long period. Another embodiment contains an addition of antimicrobial agents such as benzalkonium chloride, dichlorophen, and didecyldimethyl ammonium chloride to the ferrous sulfate-lime formulation.

The invention discloses a preparation method of doped lithium iron oxide, and belongs to the technical field of new energy. The preparation method comprises following steps: a lithium hydrogencarbonate solution, an ammonium ferrous sulfate solution, a titanyl sulfate solution, and an acidifying or alkalizing agent are mixed, and are added into a base solution, wherein in the adding process, the pHvalue is maintained to be 7 to 7.5, the temperature is controlled to be 50 to 60 DEG C, and the stirring speed is controlled to be 300 to 400r/min; after material adding, the temperature is increasedto 90 to 95 DEG C, stirring reaction is carried out for 30 to 60min, and filtering washing are carried out to obtain a precipitate; the precipitate is subjected to drying, is introduced into a rotarykiln for calcining at 700 to 900 DEG C for 8 to 10h to obtain a calcined product, wherein air is introduced in calcining; and the calcined product is subjected to crushing, sieving, and removing of iron to obtain the doped lithium iron oxide. According to the preparation method, preparation of the doped lithium iron oxide can be realized, the surface area is large, the activity is high, and the surface is of a porous structure.

The invention relates to an anti-pollution and high-flux modified polymer separation membrane and a preparation method thereof. The preparation method comprises the following steps of adding an acrylic monomer into an ammonium ferrous sulfate aqueous solution to prepare a grafting solution, and putting a polymer separation membrane into the grafting solution, introducing inert gas to remove oxygen, and carrying out electron beam radiation grafting to prepare the modified polymer separation membrane. The acrylic monomer is grafted on the polymer separation membrane through radiation, so that the hydrophilicity of the membrane is obviously improved, and the water content exceeds 3-5 times of that before modification; when the modified polymer separation membrane is used for filtering a BSA solution, the water flux is improved by 20-50% compared with the water flux when pure water is filtered, the flux decline rate is remarkably reduced, and the pollution resistance of the membrane is remarkably improved. The preparation method provided by the invention is simple to operate, low in cost and easy to realize industrial application, and has important significance in promoting the application of the separation membrane.

The invention provides a composition for on-line silicon meter detection, a preparation method thereof and an on-line silicon meter detection method. The composition for on-line silicon surface detection comprises a color developing agent, a masking agent and a reducing agent, wherein the color developing agent is an acidic ammonium molybdate solution which comprises ammonium molybdate with the concentration of 49.8-50.2 g/L, H2SO4 with the concentration of 79.5-81.2 g/L and the balance of water; the masking agent is an oxalic acid solution which comprises oxalic acid with the concentration of39.8-40.2 g/L and the balance of water; the reducing agent is a ferrous ammonium sulfate solution which comprises ferrous ammonium sulfate with the concentration of 19.8-20.2 g/L, H2SO4 with the concentration of 22.1-22.6 g/L and the balance of water. The composition is used for replacing an outsourcing medicament for on-line silicon meter detection, has higher accuracy, effectively solves the problem of high cost of the outsourcing medicament, can ensure the normal operation of the silicon meter, and improves the efficiency of water quality detection of a thermal power plant and the continuity of related production.

A method for coloring black on purple teak includes such steps as shaping, polishing, immersing in the aqueous solution of ferrous sulfate or ferrous ammonium sulfate, washing, drying in air, and immersing in hot flax oil.

The present invention discloses a fiber coating for metal. The fiber coating consists of the following raw materials in parts by weight: 10-13 parts of hydroxyethyl cellulose, 600-700 parts of diphenylmethane diisocyanate, 340-370 parts of 2-(perfluoroalkyl)ethanol, 450-490 parts of polyoxytertramethylene glycol, 1-2 parts of 1,4-butylene glycol, 1.3-2 parts of 4-vinylcyclohexane, 90-100 parts of nano silicon dioxide, 16-20 parts of hydrogen-containing silicone oil, 2-3 parts of methanol, 2-5 parts of calcium aluminate, 1-2 parts of ferrous ammonium sulfate, 3-4 parts of sodium potassium silicate, 20-27 parts of phthalate polyester, 7-9 parts of diacetone acrylamide, 4-8 parts of carboxymethyl cellulose, and 0.01-0.02 parts of chloroplatinic acid. According to the present invention, hydroxyethyl cellulose and carboxymethyl cellulose are subjected to blending treatment, so that the compatibility between materials is improved, dispersibility of particles in resin is improved, agglomeration is effectively prevented, and coating surface strength can also be increased.