38 results about "Sodium pyrosulfate" patented technology

The invention discloses a method for regenerating a positive electrode active material in a LiNi1/3Co1/3Mn1/3O2 waste lithium ion battery. The method includes the steps that the waste lithium ion battery is subjected to discharging and dismantling or positive pole leftover materials and positive electrode fragments are collected to obtain waste positive plates, and the waste positive plates are subjected to roasting, water dissolving and filtering to obtain waste LiNi1/3Co1/3Mn1/3O2 powder; the waste LiNi1/3Co1/3Mn1/3O2 powder and sodium pyrosulfate are roasted after being mixed according to a certain proportion, roasted products are leached by water, then a sodium carbonate solution is added into liquor, filtering is conducted, after the proportion of Li, Ni, Co and Mn in carbonate modulation filter residues is supplemented, the Li, Ni, Co and Mn are subjected to ball milling, compressing and roasting, and accordingly the LiNi1/3Co1/3Mn1/3O2 positive electrode material is obtained again. Components of filter liquor are adjusted through sulfuric acid, crystallization processing is carried out, and then sodium hydrogen sulfate is obtained.

The invention discloses a quick dry adhesive for a corrugated paper box. The quick dry adhesive is prepared from the following components: corn starch, bentonite, sodium hypochlorite, sodium pyrosulfate, ferrous sulfate, a drier, a 3% (volume concentration) sodium hydroxide solution, borax, sodium sulfite, clean water and a defoamer. The adhesive disclosed by the invention is stable in quality, short in reaction time, fast in natural drying speed, simple in process and easy to operate. A catalyst used in the quick dry adhesive disclosed by the invention is low in cost, stable in performance and can be stored for a long time, and gelation and stratification phenomena cannot be easily caused.

The invention discloses a determination method of total aluminum content in steel and alloy. The method comprises the steps of pretreatment and determination, and particularly comprises the following steps: adding distilled water, hydrochloric acid and nitric acid to a sample to be determined to heat and dissolve at low temperature; filtering by slow speed filter paper; taking filtrate as main liquid, fusing the residue by using sodium pyrosulfate, leaching by hydrochloric acid, and merging the main liquid; fixing the volume by using the distilled water, so as to obtain a sample solution to be determined; and determining by using a spectrograph, so as to obtain the target content data. By adopting the determination method, the defects that the wet-process analysis operation process is complicated, the operation is not easy to grasp, more interference elements exist, more chemical reagents are used and the like are avoided, and the characteristics that a plasma emission spectrum is low in detection limit, good in accuracy, small in matrix effect and the like are fully and effectively utilized. The determination method disclosed by the invention is simple and convenient to operate, less in reagent dosage, high in analysis accuracy, short in detection period, and small in environmental pollution, and the determination requirements of total aluminum content in daily steel and alloy can be met.

The invention discloses a composite sludge deep dehydration agent, and a preparation method and a use method thereof. The composite sludge deep dehydration agent comprises a modifier, the modifier ispowder, the effective content is more than 90%, and the passing rate of the modifier with fineness of 100 meshes is more than 85%; wherein the main component of the modifier is a combination of multiple of magnesium sulfate, magnesium chloride, aluminum sulfate, magnesium oxide, ammonium chloride, sodium gluconate, ferric chloride, ferric sulfate, ammonium sulfate, aluminum chloride, sodium aluminate and sodium pyrosulfate. The method includes steps of: carrying out mechanical dehydration on the sludge to be treated to obtain plastic sludge with the water content of 75-85%; mixing the modifierwith water to prepare a modifier solution, wherein the mass ratio of the modifier to the water is 1:1-1:5; adding the modifier solution into the plastic sludge, wherein the adding amount of the modifier solution is 0.5-2% of the mass of the plastic sludge; and carrying out re-dehydration treatment through high-pressure deep dehydration equipment, so that the water content of the sludge with the water content of 75-85% can be reduced to 45-70%.

The invention discloses water purifying and disinfection effervescent tablets and a preparation method thereof. The water purifying and disinfection effervescent tablets contain the following components in parts by mass: 4-6 parts of chlorine dioxide powder, 1-3 parts of sodium chloride, 4-6 parts of sodium pyrosulfate, 4-6 parts of food-grade chitosan, 3-5 parts of citric acid, 5-7 parts of NaHCO3, 4-6 parts of polyvinylpyrrolidone, 5-7 parts of sesame oil, 4-8 parts of ethanol solution, 1-3 parts of catalyst, 3-5 parts of active halogen preparation, 2-4 parts of polyhexamethylene biguanidine and 0.8-1 part of flavoring agent. The purifying agent disclosed by the invention has the advantages of simplicity in preparation technology, low cost and good purifying effect and is suitable for disinfecting the drinking water for military personnel, field workers, tourists and residents in regions without tap water and the industrial drinking water.

The invention discloses nutrient-rich monascus blueberry wine, which is characterized by comprising the following ingredients (by weight): 100-120 parts of blueberry, 4-5 parts of monascus, 4-6 parts of maltose, 5.8-8.2 parts of aroma-producing yeast, 1-2 parts of pectase, 2.3-3.2 parts of yeast cell wall, 2-3 parts of konjac glucomannan, 1-2 parts of beta-glucanase, 1-2 parts of alkaline amino acid, 0.3-0.4 part of sodium pyrosulfate and 3-5 parts of 600 DEG C heating modified attapulgite. With the nutrients of monascus, the product is enriched. According to the production technology, two kinds of yeasts, namely aroma-producing yeast for promoting fermentation and aroma-producing yeast for inhibiting fermentation, are adopted during the main fermentation stage to conduct cooperative fermentation at 16-20 DEG C; in the late fermentation stage, konjac glucomannan is hydrolyzed to generate sugar for aroma-producing yeast, then fermentation time of aroma-producing yeast is prolonged, and nutrition and taste of the fermented final product are more optimized; and with addition of attapulgite, the blueberry wine can be clarified. The technology is simplified.

The invention discloses a water clarifying agent capable of flocculating fast.The water clarifying agent comprises, by weight, 25-35 parts of brewer's grain, 5-6 parts of wheat gluten flour, 2.1-2.3 parts of sodium pyrosulfate, 3-4 parts of xanthan gum, 3-4 parts of polyacrylamide, 3-4 parts of activated carbon powder, 68-70 parts of sunflower head, 1.8-2.2 parts of ferroferric oxide powder, 29-30 parts of 0.1mol/L ferrous oxalate solution, an appropriate amount of acetic acid solution and an appropriate amount of water.The water clarifying agent has the advantages that the water clarifying agent is capable of flocculating fast in water by adding raw materials such as the xanthan gum and the polyacrylamide, the suspended matter, harmful heavy metal and the like in the water can be absorbed in a short time, the visibility of the water can be improved, sunlight transmission is promoted, the photosynthesis of aquatic plants is intensified, oxygen release of the water is increased, and good economic value and environment protection value are achieved.

The invention relates to a novel municipal sewage treatment method. The method comprises the following steps: firstly, performing adsorption treatment on sewage; then adding hydrogen peroxide and sodium pyrosulfate into the sewage to carry out ultraviolet optical irradiation treatment; then adding a processing agent for treatment; performing biological degradation treatment; finally sterilizing byadopting chlorine to carry out processing of the sewage. According to the novel municipal sewage treatment method disclosed by the invention, the problem of unbalance of C-N ratio of the municipal sewage can be effectively solved, so that processing speed of the sewage is higher, the efficiency is higher, the effect is better and the quality of effluent water is good; in a whole processing procedure, harmful gas and sludge are basically not produced, so that the water treatment cost is lower.

The invention discloses a reaction kettle with a smashing function for sodium pyrosulfate production. The reaction kettle comprises a reaction kettle body, a driven roller, a fixing plate, a stirringmotor, stirring blades, a discharging outlet, a smashing motor and a driving roller; a feeding inlet is formed above the reaction kettle body, a guide plate is arranged below the feeding inlet, the driven roller and the driving roller are arranged below the guide plate through the driven shaft and the driving shaft respectively, the fixing plate is welded to the interior of the reaction kettle body, the stirring motor is arranged at the lower end of the reaction kettle body, the stirring blades are welded to the outer side of a stirring shaft, the discharging outlet is formed in the lower endof the reaction kettle body, and the smashing motor is arranged on the outer side of a protective outer shell through a driving shaft. According to the reaction kettle with the smashing function for sodium pyrosulfate production, the lower portions on the outer sides of the driven roller and the driving roller are each provided with an anti-sticky plate, the effect of scraping away raw materials attached to the surfaces of the driven roller and the driving roller is achieved, and raw materials can fall into the reaction kettle body conveniently.

The invention relates to the technical field of coal chemical industry, and concretely relates to a method and a system for preparing sodium pyrosulfite by using sodium sulfate crystal salt. The method comprises the following steps: (1) contacting the sodium sulfate crystal salt with a calcium hydrogen sulfite solution to carry out first reaction to obtain a first mixed system, and carrying out centrifugal separation on the first mixed system to obtain a gypsum precipitate and a sodium hydrogen sulfite solution; and (2) introducing furnace gas containing sulfur dioxide into the sodium hydrogen sulfite solution to form a sodium hydrogen sulfite supersaturated solution, and separating out sodium pyrosulfite crystals in the sodium hydrogen sulfite supersaturated solution to obtain a second mixed system. Sodium pyrosulfate is produced by replacing sodium carbonate with the byproduct sodium sulfate crystalline salt of the coal chemical industry wastewater, so that the adding cost of sodium carbonate can be effectively saved, and sodium pyrosulfate meeting the national standard is produced for downstream markets to use; and the byproduct gypsum can be used as a building material and a cement raw material, so that the resource utilization efficiency and the economic benefit of the byproduct crystal salt are improved.

The invention relates to a foamed polystyrene resin with high flame retardancy and a preparation method thereof. The method for preparing the foamed polystyrene resin with high flame retardancy comprises the following steps of: in a reaction kettle at 69-71 DEG C, mixing and dissolving 0.3-1 weight parts of sodium pyrosulfate or cellulose, 0.25-0.6 weight parts of calcium phosphate, 0.02-0.05 weight parts of sodium dodecylbenzenesulfonate and 180-300 weight parts of deionized water to obtain a first mixture; adding a fire retardant and 100 weight parts of styrene monomers into the first mixture, and allowing the reaction to take place at 89-91 DEG C for 3-5 hours to obtain a second mixture; when the second mixture becomes hard, heating up to 95 DEG C and curing for 30 min to obtain polystyrene resin particles; and performing foaming treatment on the polystyrene resin particles to obtain foamed polystyrene resin with high flame retardancy. The foamed polystyrene resin with high flame retardancy, prepared by the method, has good flame retardancy, low thermal conductivity and high strength.

The invention provides a method for resource utilization of chromium-containing sodium hydrogen sulfate, which comprises the following steps: dissolving chromium-containing sodium hydrogen sulfate, carrying out solid-liquid separation, and adding a reducing agent into the obtained liquid phase for reaction; and mixing the reacted solution with an adsorbent for adsorbing, carrying out solid-liquidseparation, and and evaporating, cooling and crystallizing the obtained liquid phase to obtain anhydrous sodium hydrogen sulfate. According to the method, chromium in the chromium-containing sodium hydrogen sulfate is reduced and selectively adsorbed, so that components in the chromium-containing sodium hydrogen sulfate are separated, chromium is subjected to harmless treatment, sodium hydrogen sulfate salt is purified, and the purity of the anhydrous sodium hydrogen sulfate product can reach 98% or above, the purity of the further prepared sodium pyrosulfate reaches 95% or above, and the added value of the products is high; and the method is simple in process, the adsorbent can be regenerated and recycled, the operation and raw material cost is low, and good economic benefits and application prospects are achieved.

The invention provides a concrete waterproof agent, which is prepared from the following raw materials by weight: 1-60 parts of ammonium ferric sulfate, 1-30 of glacial acetic acid, 1-40 parts of 8-hydroxyquinoline, and 1-50 parts of sodium pyrosulfate. According to the present invention, the waterproof agent has good adaptability to concrete, has advanced and reasonable waterproof mechanism, andcan generate iron hydroxide colloid at the appropriate timing of cement hydration, wherein the colloid can be generated at the micro-gap, and block the gap, and has characteristics of good waterproofand anti-crack performance, good aging resistance, high anti-penetration strength and environmental protection.

The invention discloses a preservative suitable for the fresh-keeping of bananas. The banana preservative is characterized in that the finished product comprises the following components: sodium benzoate, sodium pyrosulfate, sodium chloride, citric acid, edible salt, tartaric acid, chitin, lignin and deionized water. The fruit and vegetable preservative of the invention uses the sodium benzoate and the sodium pyrosulfate as fresh keeping agents which can prevent the deterioration of fruits and vegetables and prolong the fresh-keeping time. The citric acid can effectively prevent discolorationand prevent bacterium breeding, and plays a good protective and fresh-keeping effect on fruits and vegetables. The preservative is simple in formula and convenient to use.

The invention discloses a method for coproducing sodium pyrosulfate and sulfuryl chloride. The method comprises the following steps: reacting the industrial byproduct sodium chloride with sulfur trioxide-containing gas at a high temperature to prepare sodium pyrosulfate, carrying out condensation reflux treatment on generated tail gas to recover sulfur trioxide, and introducing the tail gas into asulfuryl chloride synthesis device to synthesize sulfuryl chloride. The method is not reported at home and abroad, and is a pioneering technology; and the method prepares the high-content sodium pyrosulfate, overcomes the problems of accumulation and high treatment cost of the byproduct sodium chloride at present, converts the low-value byproduct sodium chloride into a high-value product which can be directly used for downstream production, and truly realizes the comprehensive utilization of resources.

The invention discloses a reagent for detecting formaldehyde in food. The reagent is prepared from the following raw materials in parts by weight: sodium periodate, potassium hydroxide, petroleum ether, sodium benzoate, sodium pyrosulfate, sodium thiosulfate, anhydrous ethanol, methyl dihydrojasmonate, tea polyphenol, carzenide, disodium edetate, acetylacetone, disodium hydrogen phosphate dodecahydrate, luminol, chalcanthite, oxalic acid, lauryl sodium sulfate, ginkgo leaf, polyacrylamide, diatomaceous earth, cetyltrimethylammonium chloride, lead acetate, fuchsin sulfite, and distilled water.The raw materials are widely available, the preparation process is simple, and the reagent can be used to effectively detect formaldehyde in food and to determine the content of formaldehyde in food very simply and fast with low cost, can be operated by non-professionals, has the characteristics of high reaction speed, high sensitivity and stable water solubility and meets the usage requirements of people.

The invention relates to the field of organic synthesis, and particularly provides a preparation method of triphenyl sulfonium salt, which is characterized by comprising the following steps: step 1, taking difluorobromoacetic acid and alcohol as raw materials, and carrying out condensation reaction to obtain difluorobromoacetate; 2, carrying out a substitution reaction on the bromo difluoroacetate and sodium pyrosulfate to obtain sodium sulfonate; and 3, reacting the sodium sulfonate with triphenyl sulfur chloride to obtain the triphenyl sulfonium salt. The invention aims to provide a novel synthesis method which has the advantages of simplicity in operation, safety, high yield, easiness in purification and convenience in industrial production.

The invention discloses a treatment method for improving the conductivity of an anode plate for electrolytic manganese dioxide production. The treatment method comprises the following steps: (1), injecting an acid waste electrolyte produced during the electrolytic manganese dioxide production into a treating tank 1 and a treating tank 2 respectively, adding hydrogen peroxide into the treating tank1, and then pretreating the anode plate with poor conductivity, so as to remove residual electrolytic manganese dioxide on the surface of the anode plate; (2), adding sodium thiosulfate, sodium sulfite or sodium pyrosulfate into the acid waste electrolyte in the treating tank 2, and then performing redox soaking treatment to the pretreated anode plate; (3), after completion of the soaking treatment, taking out the anode plate and washing with clear water for reuse. With the treatment method, an oxide layer on the surface of the anode plate for the electrolytic manganese dioxide production canbe removed without damage to an anode body, and the service life of the anode plate can be prolonged.