154 results about "Sulfallate" patented technology

The invention relates to a method for preparing thiocyanate and sulfate by utilizing desulfuration waste liquor in a coking plant, which comprises the following steps of: preparing saturated solution of copper sulfate, mixing the saturated solution with desulfuration waste liquor, and heating and stirring; performing solid-liquid separation to obtain a solid and sulfate liquid; adding aqueous alkali into the solid, heating at the temperature of between 50 and 98 DEG C, and stirring and reacting for 10 to 120 minutes; performing solid-liquid separation on slurry obtained by heating; concentrating the obtained liquid, and freezing for crystallizing and drying to obtain a high-purity thiocyanate product; calcining the obtained solid, adding solution of sulfuric acid, and stirring to produce the copper sulfate for circular use; adding activated carbon into the sulfate liquid, and aerating and oxidizing to purify sulfate; and concentrating the sulfate, and crystallizing and drying to obtain a high-purity sulfate product. The method solves the problem of pollution of the desulfuration waste liquor to the environment, and simultaneously, pollutants can become value products through the production of the high-purity thiocyanate product and the high-purity sulfate product.

The invention provides a method for recycling spent lithium-ion batteries to manufacture NCM salt (a sulfate mixture containing nickel, cobalt and manganese). The process comprises the steps of crushing, pyrolyzing, sorting, leaching, purifying, dosing and crystalizing. The method provided by the invention has the beneficial effects that on one hand, no soluble alkali metal ions (such as potassiumand sodium) is carried in the whole production process, so that water recycling can be realized, wastewater zero discharging is realized, and a lot of water resources are saved; on the other end, after a purification liquid is dosed, a certain proportion of NCM salt is obtained by utilizing a crystalizing principle, so that an extraction process is avoided in the process, and the generation of alot of wastewater and waste gas is avoided. In addition, the NCM slat provided by the invention can be used as a raw material for producing a precursor, and according to a proportion requirement of the precursor material, bits of nickel sulfate, cobaltous sulfate and manganese sulfate are used for adjusting so as to accomplish the preparation before precursor synthesis, so that the process is simplified, and meanwhile, the production efficiency is improved.

The invention discloses the technical field of flue gas demercuration method, and in particular to a mercury re-releasing inhibitor in wet flue gas desulfurization slurry and application method thereof. The inhibitor disclosed by the invention comprises the following components by weight percent: 25 to 45 percent of thiosulfate and 55 to 75 percent of sodium sulfide. The additive is added into the desulfurization slurry to inhibit the release of mercury; the adding amount of the additive is 100ml/L to 600mg/L. The inhibitor can react with Hg<2+> in the slurry well by utilizing the synergistic effect of thiosulfate and sodium sulfide to form stable HgS sediment; the sediment and desulfurization gypsum enter a solid phase together and are separated and removed. Meanwhile, the inhibitor disclosed by the invention is suitable for being added under the operating conditions of a wet desulfurization system, so that the waste of the additive is reduced. By the inhibitor, the re-release of the mercury in the limestone-gypsum wet flue gas desulfurization slurry can be inhibited effectively, the demercuration efficiency of a limestone-gypsum wet flue gas desulfurization system can be improved, and the problem of mercury pollution caused by coal-fired flue gas emissions can be solved effectively.

The invention provides a test method of the sulphate content in a flue gas desulfurization system, relating to the technical field of a test method of the sulphate content in a desulphurization system. The test method is characterized in that two samples to be tested are taken simultaneously, wherein one sample is used for determining the sulphite content, and the other sample is used for determining the total content of the sulphite and sulphate; and the sulphate content is calculated by the difference between the total content of the sulphite and sulphate and the sulphite content. The test method has the positive effects that the method is accurate, thus greatly improving the accuracy and the reliability of analysis results of the sulphate in the desulphurization system, and providing reliable analysis results for the operation of the desulphurization system. As the sulphite content in the desulphurization system is an indispensable project to be tested in the conventional analysis, thus not increasing the workload when determining the sulphate content. As the test can be completed only by using an analytical instrument in a conventional laboratory, and a determining project and a determining instrument do not need to be increased, the test method is a very practical analysis method.

A lubricant composition for internal combustion engines is provided, which comprises a lubricant base oil and a sulfonate detergent, wherein the content of the sulfonate detergent is 0.8% to 1.5% (by weight) calculated on the basis of the composition; the sulfonate detergent comprises calcium sulfonate with a ultra-high base number more than 400 mg KOH/g, calcium sulfonate with a high base number of 300 to 350 mg KOH/g and lithium sulfonate with a base number less than 150 mg KOH/g. The lubricant composition has low contents of S, P and sulfuric ash, the additives used have a low cost and are easily available, and the economical efficiency is better. The lubricant composition can not only meet the requirements for normal operation of engines but also meet the requirements for normal operation of automobile exhaust gas recirculation (EGR) systems.

The invention discloses a method for treating isobutyrate-containing wastewater by alcohol etherification, comprising the following steps: 1), acidifying isobutyrate-containing wastewater with concentrated sulfuric acid, adding alcohol, subjecting a reaction system to etherification under reflux condition so as to generate isobutyrate, and stopping reacting until no water is generated in the reaction system; 2), cooling reaction liquid obtained in step 1) to room temperature, re-adding water separated from the reaction system and obtained in step 1), into the cooled reaction liquid, and stirring and standing to obtain oil phase and water phase; subjecting the water phase to solid-liquid separation to obtain low-COD wastewater and sulfate; 3), rectifying the oil phase obtained in step 2); collecting an alcohol fraction and an isobutyrate fraction. The wastewater treated by the method has low COD value.

A solid composition including calcium and/or magnesium hypochlorite, a builder (e.g., one or more of carbonate, bicarbonate, sesquicarbonate), an acid, a water-soluble polymer, at least one anionic surfactant, and optionally, a hydrotrope. The composition does not include any potassium hypochlorite, sodium hypochlorite, lithium hypochlorite, N-halogenated compounds, peroxides, persulfates, hydantoins, isocyanurates, or carboxylic acids that also have hydroxyl, amino, amido, imino, or imido groups. Upon dissolution of the composition in water, the calcium and/or magnesium hypochlorite and acid react to form hypochlorous acid. The use of hypochlorous acid, rather than direct use of an alkaline or alkaline earth hypochlorite results in a composition that is typically acidic rather than basic, and that results in improved cleaning. The composition is particularly suited for cleaning and disinfecting dentures.

To provide a toner for developing an electrostatic charge image, the toner containing at least a colorant obtained by reacting a polymer with a basic dye, wherein the polymer contains 10 mol % or more of a monomer unit having any one of a sulfonic acid group, a sulfonic acid salt group, a sulfuric acid group and a sulfuric acid salt group as a constitutional unit, and the toner is obtained by forming a toner composition liquid containing at least the colorant into oil droplets in an aqueous medium, and solidifying the oil droplets into solid particles.

The invention provides a self-degradable leaking-prevention and stoppage material and a preparation method thereof, a self-degradable leaking-prevention and stoppage product and an application thereof. The self-degradable leaking-prevention and stoppage material comprises the following raw materials in mass by part: 95-105 parts of water, 6-20 parts of an acrylic acid monomer, 12-20 parts of water-soluble starch, 0.5-1.0 parts of persulfate, and 0.2-0.5 parts of a silane coupling agent. In the above raw materials, the acrylic acid monomer is taken as a polymeric monomer, sulfate is taken as an initiator for initiating polymerization of acrylic acid, a silane coupling agent is used for coupling water-soluble starch and the acrylic acid monomer, at the same time, by controlling the usage amount of the raw materials in the above ratio scope, synergism between raw materials is optimized, and the self-degradable leaking-prevention and stoppage material has excellent permeability restoration ratio and self-degradation performance.

The invention provides a comprehensive recovery method for arsenic in arsenic sulfide residues and a smoke leaching liquid in copper smelting. The smoke leaching liquid and the arsenic sulfide residues are subjected to normal-pressure vulcanization copper precipitation treatment to obtain solid state copper sulphide and a vulcanized liquid; the vulcanized liquid is discharged into a reaction tankII, and sulfur dioxide is introduced into the reaction tank II to make the vulcanized liquid converted into an arsenic-containing mother liquid; the arsenic-containing mother liquid is discharged intoa reaction tank III, the arsenic-containing mother liquid is subjected to concentration and crystallization, and filtration is performed to obtain a sulfate mixed crystal and a concentrated liquid; the sulfate mixed crystal is added into a reaction tank IV, copper sulfate and zinc sulfate in the sulfate mixed crystal are dissolved into water, and filtration is performed to obtain arsenic oxide and a solution of the copper sulfate and the zinc sulfate. The method provided by the invention has the advantages that the process collocation is reasonable, parameters in each process are strictly controlled, the arsenic can be safely disposed, and valuable elements such as copper, lead and zinc are recycled and effectively utilized, the purposes of environmental protection, economy, energy conservation and a high resource utilization rate are achieved, and harmlessness and resource utilization maximization of the arsenic are realized.

The present invention relates to a method for recovering rare earth metals from waste sulphate materials, such as waste gypsum, which is a known secondary resource of rare earth metals and widely present e.g. in areas, where industrial phosphate production takes place. The present invention combines sulphate reduction treatment, such as bioreduction with sulphate reducing bacteria, and magnetic separation, which is based on an exceptionally high magnetic susceptibility of rare earth compounds compared to e.g. calcium compounds in such reductively pretreated gypsum precipitate.

The invention relates to a method for determining the content of sulfite in a wet desulphurization slurry. The method comprises the following determination steps: 1, adding 50ml of an acetic acid-sodium acetate buffer solution having a pH value of 4.0-5.7 and 10.00ml of a 0.1mol/L iodine standard solution to a stopper possessed measuring flask; 2, adding a tested sample filtrate until the iodine solution becomes flavescent or tannish, and carrying to a laboratory under a dark condition; 3, adding 1ml of a 1% starch solution to make the tested sample become blue; 4, titrating the sample solution with a 0.1mol/L sodium hyposulfite standard solution until the blue color disappears, and recording the consumption amount of the sodium hyposulfite standard solution; carrying out a blank experiment; and 6, calculating to obtain the content of sulfite. The method which allows the buffer solution to be added in the sampling process has the advantages of avoiding of the oxidation in the sampling process, prevention of the interference of components comprising S2O3<2-> and the like in the test process, increase of the interference resistance of the slurry in the sampling and testing process, and improvement of the accuracy and the reliability of the test result.

The present invention provides a method for measuring a lubricant's total basicity by measuring one or more preselected infrared absorption bands of a lubricant and correlating the measured bands to the basicity. Preferably, the measured bands are due to carbonate or sulfate species in the lubricant.

The invention discloses a preparation method for 2,4,6-trimethyl pyridine. The method comprises the following steps of: adding raw materials of 2,4,6-trimethyl pyridine, an industrial ethanol solvent and concentrated sulfuric acid into a reactor, and reacting with stirring till crystals are formed in the reactor; filtering or performing suction filtering; washing the crystals including a part of impurities at high temperature after filtering; and recrystallizing the crystal lattice of 2,4,6-trimethyl pyridine sulfate including a part of impurities after filtering. The invention has the advantages: according to basic property of a pyridine-series compound, by performing vitriolization, crystallization in ethanol, recrystallization and alkaline hydrolysis and purifying 2,4,6-trimethyl pyridine from a crude 2,4,6-trimethyl pyridine fraction extracted by primary rectification, the concentration of refined 2,4,6-trimethyl pyridine can be increased to 97-98 percent, the recovering rate is not lowered greatly, and the concentration can be increased to over 99 percent in further recrystallization.

The invention discloses a method for synergically removing sulfate and Cr (VI) in wastewater through sponge iron and microorganisms. The method comprises the steps that under anaerobic conditions, a sponge iron solution A, a bacterial suspension B of sulfate reducing bacteria and a bacterial suspension C of sulfate reducing bacteria are mixed according to the volume ratio of 1 to 3 to 4, aging is performed for 30-60 minutes, sponge iron/microbial microspheres are repeatedly washed with deoxidized deionized water after the reaction finished and are soaked in a sterile saline solution to obtain a mixture of sponge iron and sulfate reducing bacteria/iron reducing bacteria; the mixture of sponge iron and sulfate reducing bacteria/iron reducing bacteria is mixed with sulfate and Cr (VI) in the wastewater, reaction is performed at room temperature for more than 24 hours, and meanwhile the sulphate and Cr (VI) in the wastewater are purified. The Cr (VI) metal removal rate of the method is above 89%, the required equipment is simple, reaction is completed at normal temperature and pressure, a product is a solid phase, a reaction system is a liquid phase, the product is easy to separate, and the method is used for large-scale industrial production.

The invention discloses application and a method of degrading organic wastewater with a Ce-OMS-2 catalyst, and relates to the field of catalyzing and water treatment. The Ce-OMS-2 catalyst conducts degradation on the organic wastewater by activating persulfate. The method comprises the steps of adding persulfate and the Ce-OMS-2 catalyst to a wastewater solution, performing stirring and blending evenly and standing, converting nonbiodegradable organic pollutant into micromolecule pollution free matter, and achieving the purpose of degrading the organic wastewater. According to the application and the method of degrading the organic wastewater with the Ce-OMS-2 catalyst, the Ce-OMS-2 catalyst can steadily and efficiently catalyzes and activates persulfate to degrade the organic wastewater at ambient temperature and pressure, is wide in pH application rage, fast in degrading rate and low in reaction device requirement, can be applied repeatedly for many times, and has a large application prospect in the field of nonbiodegradable organic wastewater treatment.

A thiosulfate polymer composition includes an electron-accepting photosensitizer component, either as a separate compound or as an attachment to the thiosulfate polymer. The thiosulfate polymer composition can be applied to various articles, or used to form a predetermined polymeric pattern after photothermal reaction to form crosslinked disulfide bonds, removing non-crosslinked polymer, and reaction with a disulfide-reactive material. Such thiosulfate polymer compositions can also be used to sequestering metals.

The invention relates to a detection reagent for detecting sulfate contents in a water body. The detection reagent is prepared by steps of weighing barium chromate, calcium chloride, trichloroacetic acid, absolute ethyl alcohol, and polyvinylpyrrolidone according to a weight ratio of 2:1:4:10:20; dissolving the trichloroacetic acid into the absolute ethyl alcohol, adding the polyvinylpyrrolidone and mixing uniformly; allowing the mixture to stand and be exposed to air for 24h; grinding into powder after the ethyl alcohol is volatilized; and mixing with the barium chromate and the calcium chloride. When the detection reagent is used, after steps of adding 0.1-0.3 g of the detection reagent into 5-10 mL of a water sample, shaking and mixing for 3 min, adding 0.1g of potassium hydroxide and mixing uniformly, and filtrating, then the filtrate can be detected by the detection reagent by using a spectrophotometer or a colorimeter. The detection reagent provided by the invention has advantages of carry convenience, low price, and accurate and reliable results, and can be applied for on-site quantitative determination of sulfate concentrations for surface water, underground water, production water, domestic water, and the like.

The invention discloses a sulphate aluminum cement clinker and a preparation method thereof. The sulphur aluminate cement clinker is prepared from, by weight, 20-25 parts of gypsum, 30-35 parts of pulverized fuel ash, 20-25 parts of kaolin, 5-10 parts of coal gangue, 10-15 parts of bauxite and an additive, wherein the additive is the mixture of potassium permanganate, manganese dioxide and barium sulfate, and the mass of the additive accounts for 0.02-0.05% of the total mass of the mixture of the gypsum, the pulverized fuel ash, the kaolin, the coal gangue and the bauxite. Compared with a sulphate aluminum cement clinker production process, the resource and energy consumption is low, the sintering temperature is low, and the recycling, reducing and harmless purposes of solid industrial waste residues are achieved.