2170 results about "Sodium thiosulfate" patented technology

A system for abating undesired component(s) from a gas stream containing same, such as halocompounds, acid gases, silanes, ammonia, etc., by scrubbing of the effluent gas stream with an aqueous scrubbing medium. Halocompounds, such as fluorine, fluorides, perfluorocarbons, and chlorofluorocarbons, may be scrubbed in the presence of a reducing agent, e.g., sodium thiosulfate, ammonium hydroxide, or potassium iodide. In one embodiment, the scrubbing system includes a first acid gas scrubbing unit operated in cocurrent gas/liquid flow, and a second "polishing" unit operated in countercurrent gas/liquid flow, to achieve high removal efficiency with low consumption of water. The scrubbing system may utilize removable insert beds of packing material, packaged in a foraminous containment structure. The abatement system of the invention has particular utility in the treatment of semiconductor manufacturing process effluents.

The subject invention pertains to materials and methods for the prevention and treatment of gastrointestinal diseases, including inflammatory bowel diseases such as Crohn's disease and ulcerative colitis. Therapeutic compositions of the invention include compositions that can neutralize hydrogen peroxide, such as reducing agents and oxidizing agents. In one embodiment, a therapeutic composition of the invention comprises a reducing agent such as sodium thiosulfate. Therapeutic compositions of the invention can optionally include compounds with antibacterial activity, compositions that inhibit bacterial adherence to cells and tissue, compositions that inhibits epithelial lipid peroxidation, compositions that add viscosity to a solution, compositions that inhibit most cells, and/or compositions that help to seal or repair tight junctions between cells of the colonic epithelium of the gastrointestinal tract. Methods of the invention include administration of compounds or compositions of the invention. In one embodiment, compounds or compositions of the invention are rectally instilled in a patient.

The invention relates to a gel plugging agent for deep profile control of a higher temperature oil reservoir, and a preparation method of the gel plugging agent. The gel plugging agent comprises 0.3-0.8 percent of nonionic polyacrylamide, 0.6-1.3 percent of a cross-linking agent A, 0.45-1.44 percent of a cross-linking agent B, 0.02-0.04 percent of a temperature stabilizer and 0.01-0.08 percent of a pH value regulator, wherein the cross-linking agent A is methenamine; the cross-ling agent B is hydroquinone or resorcinol; the temperature stabilizer is sodium thiosulfate, sodium bisulfite or sodium sulfite; and the pH regulator is sodium hydroxide, potassium hydroxide, sodium carbonate or sodium bicarbonate. The gel plugging agent disclosed by the invention has strong temperature resisting performance and can be used for the profile control operation of the high temperature oil reservoir with 100-160DEG C; the gel plugging agent has the characteristics of high strength after being gelatinized, stronger plugging capability for the stratum and favorable thermal stability; and in addition, after the gel plugging agent is stood at the temperature of 130 DEG C for 90 days, the strength change is little and gel breaking and hydration are avoided.

The invention relates to a beneficiation method, in particular to a beneficiation method for separating the polymetallic sulphide ore containing copper, lead, zinc and tin. The method comprises the following steps: (1) carrying out ore grinding on the raw ore before carrying out bulk flotation on copper, lead and sulphur, using diethyl mixed with xanthate as collecting agent of copper and lead mineral, using zinc sulphate and sodium sulfite as inhibitor of zinc mineral; (2) carrying out phase-2 ore grinding and selection; (3) separating copper, lead and sulphur, using sodium sulfite and sodium thiosulfate as the inhibitor of the lead and sulphur mineral, using Z-200 as collecting agent for separation and scavenging and then carrying out lead flotation after the separation and scavenging; (4) carrying out zin flotation on the bulk flotation tailings; and (5) finally, carrying out reselection on the zinc flotation tailings to recover tin. The metalliferous mineral of the invention has the advantages of good separating effect, high metal recovery rate, more complete comprehensive recovery of useful minerals, low cost of medicament, simple method, easy operation and energy conservation.

The invention discloses a method for efficiently recovering active materials of positive poles in waste lithium batteries, which is mainly characterized by adding crushed electrical core fragments into hot water, stirring the mixture, and performing first vibration screening after the filtration and drying to separate most of an active material; dissolving aluminum foil through alkaline leaching after an oversize part is magnetically separated, adjusting the pH value of an alkaline leaching filtrate by dilute acid and ammonium bicarbonate solution, and recovering aluminum; performing second vibration screening after the filtration and drying to separate a residual powder material; and placing the oversize part into water for water cyclone separation, dumping to remove an upper-layer plastic diaphragm, then using dilute sulfuric acid and sodium thiosulfate solution to wash a copper sheet to ensure that carbon powder and active powder which are adhered to the copper sheet are loosened and fall off, making the powder float on an upper layer through cyclone separation after the washing, mixing the powder and the active powders obtained by two screenings, using NaOH solution to soak the mixture after the magnetic separation, calcining the alkali-leached active powder material after the filtration and drying, and taking the active powder material as active powder for subsequent treatment. The use of the method can ensure that the recovery rates of copper and aluminum in waste lithium ion batteries reach 98.5 percent and 97 percent respectively, and the recovery rate of the active materials is about 99 percent.

The invention discloses a silicate cement grinding aid and a preparation method thereof. The silicate cement grinding aid is prepared from the following main raw materials by weight: 3-6 parts of sodium hexametaphosphate, 2-5 parts of aluminum sulfate, 5-8 parts of tetra sodium salt of amino trimethylene phosphonic acid (ATMP.Na4), 4-6 parts of ethylene diamine tetra (methylene phosphonic acid) sodium, 38-45 parts of polymeric alkylol amine, 34-42 parts of triisopropanolamine, 8-12 parts of waste engine oil, 2-5 parts of sodium alpha-olefin sulfonate, 10-16 parts of sorbitol, 15-20 parts of diethylene glycol, 8-13 parts of polypropylene wax, 6-10 parts of oxidized polyethlene wax, 4-8 parts of lignite wax, 20-30 parts of odium thiosulfate, 12-18 parts of sodium thiosulfate and 15-20 parts of quicklime powder. The prepared silicate cement grinding aid has the advantages that the quality is stable, the effect is remarkable, the adding amount is small, the use is simple, and the adding is more convenient and reliable to control.

The invention discloses a liquid cement grinding aid. The liquid cement grinding aid comprises the following components by weight percent: 10-24% of triethanolamine, 10-16% of polymeric polyol, 10-13% of molasses, 1-3% of calcium formate, 3-5% of sodium acetate, 5-10% of sodium thiosulfate and the balance water. Compared with the prior art, the liquid cement grinding aid has the advantages that the grain composition of a cement material is changed, the strength of cement is improved, enhancing effect of the cement mixed with a large quantity of limestone is improved obviously; the cost is lower as the using amount of triethanolamine is reduced; the cement output in the unit time is increased effectively, and the power consumption of per unit output is reduced as the mixing amount in the cement finishing process is low; the liquid cement grinding aid is green and environmental-friendly and cannot hurt people, or cannot damage buildings and the like as chloridion content is not contained.

The invention relates to a liquid cement grinding aid which can obviously reduce the dosage of trolamine and does not contain urea. The grinding aid comprises the following compositions in weight percentage: 1 to 10 percent of trolamine, 5 to 10 percent of diglycol, 1 to 10 percent of trimeric sodium phosphate, 10 to 30 percent of molasses, 0 to 20 percent of sodium thiosulfate, 0 to 10 percent of air entraining component and the balance being water, wherein the air entraining compositions are triterpenoid saponin air entraining agent, sodium lignin sulfonate or a mixture of the triterpenoid saponin air entraining agent and the sodium lignin sulfonate at any proportion. The invention obviously reduces the dosage of the trolamine, does not contain the urea, lowers product cost and simultaneously facilitates the environmental protection. The sodium thiosulfate has the function of exciting mixed materials of cement and can improve the initial strength and the later strength of the cement, thereby effectively improving the service performance of the cement grinding aid. The triterpenoid saponin air entraining agent and the sodium lignin sulfonate have the action of the auxiliary aided grinding and simultaneously properly entrain air to reduce the water consumption of the cement standard consistence.

The invention discloses a method for separating enriched nickel and cobalt from a laterite nickel ore lixivium, which comprises the following steps: after solid and liquid separation between the laterite nickel ore lixivium and ore slag is implemented, a vulcanizing agent is added into the lixivium, the solid and the liquid are separated after reaction precipitation, and precipitated solid is washed by a new lixivium, thus obtaining sulfide precipitate; after the sulfide precipitate is pulpified, sulphuric acid and solution of nitric acid and mixed acid are added so as to implement oxidizing leaching; the goethite method is adopted for removing iron from a superior pickle liquor; a sodium thiosulfate solution is added so as to implement copper removing; a filtering liquor that is the enriched nickel and cobalt solution is obtained. Compared with the prior art, the method for separating enriched nickel and cobalt from the laterite nickel ore lixivium is implemented at normal temperature and normal pressure, does not need a high-pressure caldron, has less device investment, low running cost, simple technical path, short process and controllable production scale; the vulcanizing agent and acids that are used in the technique can be recycled to the utmost extent and do not have emissions and environment pollution; the extraction yield of nickel and cobalt can achieve over 95 percent, and the method for separating enriched nickel and cobalt from the laterite nickel ore lixivium has low production cost and easy industrialization.

The invention belongs to the technical field of chromium residue detoxifying, and discloses a chromium residue detoxifying process. The process comprises the following steps of: performing wet grinding on chromium residue, adding water into the chromium residue to prepare chromium residue slurry; and after being subjected to acid-leaching reduction reaction, performing solid-liquid separation on the chromium residue slurry to obtain a filter cake, namely the detoxified chromium residue. The process is characterized in that: under the condition of not changing the original alkaline environment of the chromium residue, a reducing agent 1 is added into the chromium residue directly, and then the reducing agent and the chromium residue are subjected to wet grinding to form particles with 100 to 300 meshes; and the water is added to prepare the chromium residue slurry with 30 to 45 baume degrees, wherein the reducing agent 1 is sodium sulphide, sodium bisulfide, sodium thiosulfate or sodium pyrosulfite. The process has simpleness, thorough detoxification, no chromium return phenomenon and easy implementation of mass production; and the process prolongs effective reduction reaction time, improves reaction efficiency, saves the using amount of acid during the acid-leaching reduction, and has low processing cost because Cr6+ in the chromium residue is subjected to two times of dissolution and reduction.

The invention discloses a super-hydrophobic/super-oleophilicity copper wire mesh for oil and water separation and a preparation method and application thereof. The preparation method comprises the steps that firstly, the copper wire mesh is ultrasonically cleaned through diluted hydrochloric acid, absolute ethyl alcohol and deionized water respectively and dried through nitrogen; chemical deposition liquid of copper sulfate and a sodium thiosulfate solution is prepared; the cleaned copper wire mesh is placed into the chemical deposition liquid for a deposition reaction; the copper wire mesh is taken out and cleaned through the deionized water and dried in the air; the dried copper wire mesh is placed in a solution of a curing agent and polydimethylsiloxane with hydroxyl sealed end, and the copper wire mesh is taken out and heated. No expensive fluorine-containing substance is needed, the copper wire mesh has the advantages that the preparation technology is simple, reaction conditions are mild, no strong acidity or strong basicity or corrosivity reagents are needed, and no harm is caused to the environment, separation of oily wastewater can be achieved rapidly and efficiently, the good separation effect on chloroform, normal hexane, petroleum ether, plant oil, diesel oil, aviation kerosene and the like is achieved, and separation of strong acidity, strong basicity and high salinity oily wastewater can be achieved.

The invention provides a preparation method of an S/TiO2 composite material for an anode of a sodium-sulfur battery. The preparation method comprises the following steps: dissolving butyl titanate, a template agent and a hydrolysis inhibitor into absolute ethyl alcohol; adding a mixed solution of de-ionized water and the absolute ethyl alcohol to form semi-transparent sol; transferring the sol into a high-pressure reaction kettle to react; calcining a solid product in air to remove the template agent to obtain meso-porous titanium dioxide; dispersing the meso-porous titanium dioxide into a sodium thiosulfate solution dissolved with a surfactant; adding hydrochloric acid to react; washing the solid product by a lot of the de-ionized water and drying; and eating under the protection of an inert atmosphere to obtain the S/TiO2 composite material. The meso-porous titanium dioxide prepared by the preparation method is large in specific surface area, high in porosity and strong in adsorption capability; the electrical conductivity of sulfur can be improved and a lot of nano sulfur and polysulfide can be contained; the polysulfide can be effectively prevented from being dissolved and diffused in electrolyte, and the utilization rate of the sulfur is improved; meanwhile, the structure of the meso-porous titanium dioxide is stable and a pore channel cannot be easily damaged, so as to have buffering effects on volume expansion and retraction in a charging/discharging process of a sulfur electrode.

A method for treating desulfurization waste liquid of a wet oxidation method. The method comprises the following steps: firstly adding a decolorant into desulfurization waste liquid for decolorizing treatment, filtering after decolorization, adding alkali into the filtrate, controlling the PH to be 8-9, performing evaporation concentration under a condition with a negative pressure, condensing the evaporated ammonia gas and water vapor to obtain concentrated ammonia liquor which can be returned to the system for recycle or be used to produce ammonium sulfate, performing fractional crystallization of the concentrated desulfurization liquid to respectively obtain high-purity sodium thiocyanate and sodium hyposulfite. The invention has a simple process, and stable operations, and effectively solves the problem of difficult HPF desulfurization waste liquid treatment in coking enterprises; the method not only reduces the discharge of the waste liquid, but also recovers a lot of chemical products with economic value, and the method has quite significant economic benefits and environmental benefits.

A process of silver coating with no cyanogens at the action of magnetic field and impulse current. The main process is impulsive silver coating. Ingredients of the solution are as follow. AgNO3,50-60g/L; sodium thiosulfate, 250-350g/L; potassium, 90-110g/L; K2SO4,20-30g/L; boracic acid, 25-35g/L; brightener,5m/L. Stir at 20-40deg.C for 10min. pH of silvering solution is 4.2-4.8. Mean impulse current density is 0.5-1ms. Duty ratio is 5-15%. Orientation of magnetic field is parallel with that of impulse current. Square ratio of positive and negative pole is bigger than 2.

The invention discloses a graphene/polyaniline/sulfur composite material characterized in that graphene oxide is reduced to graphene by aniline, meanwhile, the aniline is oxidized and polymerized to polyaniline, and sulfur particles produced by sodium thiosulfate and hydrochloric acid are evenly distributed on a graphene polyaniline conducting layer in a reaction process. The invention further discloses a preparation method of the graphene/polyaniline/sulfur composite material. The method comprises the steps as follows: firstly, dispersing the graphene oxide in water to form a uniform graphene oxide solution, then dissolving an aniline solution into the hydrochloric acid to form an aniline salt solution, and adding the aniline salt solution into the graphene oxide solution; dissolving a sodium thiosulfate solid into the water to form a sodium thiosulfate solution, dropwise adding the odium thiosulfate solution into a graphene oxide and aniline mixed solution, stirring the mixture at a certain temperature for a moment, and separating, washing and drying produced deep green precipitation to obtain the graphene/polyaniline/sulfur composite material. The method is low in energy consumption, simple to operate, good in controllability, high in yield and suitable for mass production.

The invention discloses an iron pyrite inhibitor for use under a low-alkalinity condition. The iron pyrite inhibitor consists of the following components in parts by weight: 40-50 parts of sodium thiosulfate, 40-50 parts of citric acid and 5-15 parts of polyacrylamide, wherein the polyacrylamide is hydroxyl-containing low molecular polyacrylamide of which the molecular content is 400-600. The inhibitor is prepared by using a method comprising the following steps of weighing sodium thiosulfate, citric acid and polyacrylamide; uniformly mixing to obtain 1-5 percent by weight of aqueous solution; and stirring. The iron pyrite inhibitor is used for selectively inhibiting iron sulfide minerals under a low-alkalinity condition, has good inhibition effects on minerals such as pyrite, magnetic pyrite and the like, has the advantages of stable performance, small using amount, low cost and environment friendliness, can be widely applied to sulfide ore dressing of copper, copper lead, copper zinc, lead zinc, copper lead zinc, gold and the like, and contributes to effectively increasing the scoring indexes of copper, lead, zinc, metal minerals and pyrite, effectively enhancing the flotation separation effect of multi-metal sulfide minerals and increasing the recovery rate of associated gold and silver.

The invention discloses a concrete reinforcing agent which is mainly prepared from the following components by mass parts: 30-40 parts of an isopropanolamine compound, 10-12 parts of triethanolamine, 1-5 parts of polyalcohol and 3-5 parts of sodium thiosulfate. The preparation method comprises the following steps: preparing the isopropanolamine compound, mixing the isopropanolamine compound, triethanolamine, polyalcohol and sodium thiosulfate with water, adding water for diluting, and uniformly stirring to obtain the concrete reinforcing agent. When being applied, the concrete reinforcing agent is directly mixed with cement, mineral powder, coal ash, a water reducing agent, water, sand and stone. The concrete reinforcing agent is well adaptive to an additive, and the later concrete strength is remarkably improved.