95results about How to "Applicable removal" patented technology

The invention discloses a weak acid cation exchange microballoon resin of magnetic acrylic acid series and a synthesis method thereof, belonging to the field of magnetic resin. The method comprises the following steps of: evenly mixing magnetic particles with the size of 0.01-10mu m with an oil phase, carrying out suspension polymerization under a certain temperature and conditions, and hydrolyzing to finally form the weak acid cation exchange resin. The microballoon resin consists of weak acid cation exchange microballoon resin frames and the magnetic particles packaged therein, wherein the weight ratio of the resin frames to the magnetic particles is 1:(0.05-1), a basic structure formula of the resin frames is shown following the specification of the invention: wherein n can be 1,2,3......; the weak acid volume exchange capacity of the resin is 1.0-5.0mol/L, the average particle diameter thereof is 20-500mum, the specific saturation magnetization intensity thereof is 5.1-33.4emu/g, and the weak acid exchange capacity is 1.0-5.0mol/L. The microballoon resin of the invention can be used in treatment of various water bodies and used for removing ammonia nitrogen and a plurality of metal ions, such as calcium, magnesium, copper, nickel, cadmium, and the like.

The invention relates to a waste solution mercury removal adsorbent, a preparation method and an application method thereof. A material with high specific surface area and large pore volume is adopted as the adsorbent carrier, the material is immersed into a reaction precursor solution of a metal sulfide or metal selenide nanometer adsorbent, organic acid, organic amine, sulfhydryl compound or polyhydric alcohol is used as a reactant ligand, the reactant ligand reacts with a sulphur and selenium precursor through metal ions to generate the metal sulfide or metal selenide nanometer adsorbent, the adsorbent deposits on the surface of the carrier, and the mercury removal adsorbent with high adsorption capacity is prepared. According to the invention, the mercury removal adsorbent is prepared to a filter layer to filter the waste solution containing mercury ions; the mercury ions in a liquid phase are adsorbed onto the adsorbent to fulfill the purpose of liquid phase mercury removal by utilizing exchanging of the metal ions on the material and the mercury ions. The waste solution mercury removal adsorbent is suitable for removal and recycling of mercury in waste water of mercury-involved industries.

A craft that makes use of paper making white mud to eliminate sulfur dioxide in soot comprises the steps of: Add the circular water from pellucid pool and white mud to slurry pool; After mixing round, put them to serum pool, put them to desulfurization tower by add-pressure pump to contact with soot; Reacted liquor flow from the bottom of desulfurization tower and go to deposition pool; The circular water goes to pellucid pool to be used again. The present invention uses simple equipment, has high efficiency of desulfurization and low cost. It uses paper making white mud as desulfurization to change waster to treasure and has a large value to apply and extend.

The invention provides a method for preparing a polymerized ferrotitanium water purifying agent by adopting waste metatitanic acid and belonging to the technical field of water treatment, wherein waste metatitanic acid, sulphuric acid, sodium hydroxide and additives are taken as raw materials. The method for preparing the polymerized ferrotitanium water purifying agent by adopting waste metatitanic acid comprises the following steps: adding sulphuric acid into paste of waste metatitanic acid, controlling temperature to be 90-100 DEG C, filtering, adding sodium hydroxide into filtrate, adjusting pH to be 0.5-2.5 for obtaining an adjusting solution, carrying out polymerization for 0.1-0.5 hour at room temperature or under heating condition, adding the additives, standing and curing for 5-24 hours at room temperature to obtain a polymerized ferrotitanium water purifying agent liquid product, and solidifying for obtaining a polymerized ferrotitanium water purifying agent solid product. The method for preparing the polymerized ferrotitanium water purifying agent by adopting waste metatitanic acid has the advantages that waste metatitanic acid with high titanium content is utilized for preparing a high-efficiency water treatment reagent with good pollution cleaning and decolorizing performances, the polymerized ferrotitanium water purifying agent can be widely applied to the fields of municipal sewage and industrial wastewater and is especially applicable to removal of pollutants such as sewage chromaticity, organic matters and heavy metals, a preparation technology is simple, and preparation equipment is simple and low in cost.

The invention discloses a preparation method of an activated carbon adsorption material for removing medium and low-concentration formaldehyde, and belongs to the technical field of preparation of activated carbon adsorption materials. The key point of the technical scheme provided by the invention is that the preparation method comprises the following steps: by using walnut shells as a raw material, sequentially performing grinding, acid pickling, water washing and carbonization; sequentially performing washing, drying, modifying, ultrasonic combination, soaking, washing and drying on prepared activated carbon, thus obtaining the activated carbon adsorption material for removing the medium and low-concentration formaldehyde. The activated carbon adsorption material prepared by the preparation method disclosed by the invention is stable in performance, and is suitable for removing the low-concentration formaldehyde in a room; in addition, the raw material is simple and easy to obtain, and a treatment process is simple; the activated carbon adsorption material is suitable at home; when the concentration of formaldehyde gas is 0.8 to 1.0mg/m<3>, the adsorption rate of the prepared activated carbon adsorption material to the formaldehyde gas reaches 60 to 70 percent.

The invention discloses a method for preparing cationic cross-linked starch xanthate. The method comprises the following steps of: dissolving NaOH and 2,3-epoxypropyltrimethyl ammonium chloride in cold water, and stirring and mixing with starch; reacting for 9 minutes at the temperature of 60 DEG C in a fast microwave reactor; washing products by using an aqueous solution of ethanol, and finally, drying to obtain etherified starch; adding an alkaline solution prepared by water, sodium hydroxide and sodium chloride into etherified starch to be mixed to form slurry; dissolving epoxy chloropropane in the alkaline solution, dripping the mixture into the slurry, and reacting for 2 hours at the temperature of 50 DEG C; regulating the pH value of the solution to be at 7 by using hydrochloric acid; washing by using absolute ethyl alcohol after suction filtration, and drying to obtain the cross-linked etherified starch; dissolving the etherified starch into the water, adding a solution of sodium hydroxide and adding carbon disulfide, stirring to react for 2 hours at the temperature of 50 DEG C, adding a solution of magnesium sulfate, and continuously reacting for 10 minutes; and performing suction filtration, washing by using distilled water, acetone and diethyl ether in sequence, and drying to obtain the cationic cross-linked starch xanthate. When the cationic cross-linked starch xanthate is used for treating heavy metal wastewater, a cationic polymer is not required to be added.

A preparation and an application of an environmental-protective aqueous paint remover are disclosed. The environmental-protective aqueous paint remover is prepared from following raw materials, by weight, 22-25% of benzyl alcohol, 15-18% of sodium p-toluene sulfonate, 3.0-4.0% of potassium hydroxide, 0.8-1.4% of sodium gluconate, 4-8% of a cosolvent and 45-55% of tap water. The paint remover is prepared by following steps: (1) adding the sodium p-toluene sulfonate, the sodium gluconate, the potassium hydroxide to the tap water to obtain a mixture and stirring the mixture to enable the sodium p-toluene sulfonate, the sodium gluconate and the potassium hydroxide to be completely dissolved; and (2) adding the benzyl alcohol, triethanolamine and ethanol to obtain a mixture and stirring the mixture for dissolving the benzyl alcohol, the triethanolamine and the ethanol to obtain a transparent liquid product with a color from white to yellow. The paint remover is alkaline and is subjected to a paint removing experiment during a use process with a heating temperature being 50-70 DEG C. The environmental-protective aqueous paint remover is advantaged in that: (1) the paint remover is water-soluble and is environmental-protective when being used for replacing a volatile solvent paint remover; (2) the paint remover is free of toxic chemical products; (3) the paint remover is suitable for removing various paints; (4) the paint remover is alkaline and is free of damaging a base material; and (5) the paint remover is not liable to volatilize, can be used repeatedly and is low in comprehensive cost.

The invention discloses Acinetobacter baumannii AL-6 and an application thereof. The strain is preserved in the China General Microbiological Culture Collection Center (CGMCC) in November 8th, 2016, and the preservation number is CGMCC No. 13248. The strain can conduct denitrification through heterotrophic nitrification-aerobic denitrification. Under the aerobic condition, with CH3COONa as a carbon source and NH4+-N as a nitrogen source, removal of 81.9-99.9% of NH4+-N and 59.7-90.8% of TN can be achieved; with NO3--N as a nitrogen source, the removal rate of NO3--N is 50.2%, and the removal rate of TN is 48.2%; with NO2--N as a nitrogen source, the removal rate of NO2--N is 50.3%, and the removal rate of TN is 48.8%. The strain AL-6 has good application prospects in the field of treatment of wastewater containing highly concentrated ammonia-nitrogen or nitrate nitrogen or nitrite nitrogen.

The invention discloses a method for degrading antibiotics in water by activating peracetic acid through zero-valent metal. According to the method, peracetic acid which is high in oxidation-reduction potential, widely applied to the disinfection field and few in by-products is selected as a precursor for generating hydroxyl radicals, and the peracetic acid is activated by the zero-valent metal to generate strong oxidizing free radicals so as to degrade antibiotics in the water body. The method comprises the following specific steps: adding a proper amount of a strong oxidant, namely the peroxyacetic acid into a to-be-treated water body containing antibiotics, then adding the zero-valent metal with a concentration of 0.02 g/L-0.1 g/L as an activating agent, adjusting the pH value of a reaction solution to 3-9, and carrying out uniform stirring and reacting at room temperature for 30 minutes so as to oxidize and degrade the antibiotics. The zero-valent metal used in the method has the advantages of being low in cost, high in activation efficiency, easy to recycle and the like, the peracetic acid can be completely activated within 30 min, and high antibiotic degradation efficiency is achieved, so the method is a novel antibiotic degradation technology which is rapid, efficient and environmentally friendly.

The invention belongs to the technical field of gas purification treatment, relating to a catalyst for removing low-concentration formaldehyde in gases and the application thereof. The catalyst is characterized by using at least two of Ag, Co, Fe and Cu as main active components which are loaded on an HZSM-5 type molecular sieve carrier and are 1-20 percent by weight of the catalyst. The catalyst is filled in a reactor and applied to two alternately operating stages, i.e. a storage stage and a regeneration stage, wherein the reactor can be inflated with ozone, can be used for heating at a controlled temperature and can carry out DBD (Dielectric Barrier Discharges). At the storage stage, low-concentration formaldehyde in the gases is firstly stored on the catalyst; and at the regeneration stage, ozone or oxygen-contained gas is introduced for heating or carrying out the DBD so that the formaldehyde stored on the catalyst is fully oxidized into carbon dioxide and water, wherein the oxygen content in the introduced oxygen-contained gas at the regeneration stage is 20-100 percent, and air can be directly used as the oxygen-contained gas at the regeneration stage. In the invention, the provided catalyst with the function of selective storing and catalytic oxidation on the formaldehyde has the advantages of low energy consumption and no secondary pollution, is extremely suitable for removing low-concentration formaldehyde in gases and is particularly suitable for removing formaldehyde pollutants in indoor air.

The invention relates to a method for preparing a high-molecular ferro-silicon-titanium coagulant used for water treatment; wherein the high-molecular ferro-silicon-titanium coagulant is formed by production of nontoxic titanium mud solid refuse during a titanium white production process. The preparation method comprises the following steps: performing an acid leaching reaction at a first phase on titanium mud by a hydrochloric acid solution to obtain a leaching liquid I and a filter residue I; performing the acid leaching reaction at a second phase on the filter residue I by a concentrated sulfuric acid solution to obtain a leaching liquid II and a filter residue II; then performing an alkali leaching reaction on the filter residue II by highly basic; and finally performing an oxidation slaking reaction on a mixed leaching liquid of the leaching liquid I, the leaching liquid II and a leaching liquid III by an oxidizing agent. The coagulant used for water treatment has high efficiency for removing organic matter and chroma, and can be used for pretreatment and deep treatment for city sewage or industrial wastewater.

The invention provides a Pseudomonas nitroreducens. strain and application thereof. The strain is Pseudomonas nitroreducens. Pf2, and is preserved in China Center for Type Culture Collection, and the preservation number is CCTCC NO: M2021274. The strain can synchronously perform nitrification and denitrification by taking organic carbon as a carbon source under an aerobic condition, and is suitable for removing organic wastewater containing ammonia nitrogen or nitrate, the NH4 < + > -N removal rate can reach 92.7 percent, and the NO3 < - > -N removal rate can reach 100 percent; and the treatment process can be greatly simplified, the treatment efficiency is improved, and the operation and maintenance cost is reduced.

The invention relates to an environment-friendly type high-temperature denitrification catalyst and a preparation method thereof. The preparation method comprises the following steps: taking tungstenzirconium composite oxide as a main catalyst component, one or more of barium, erbium, tin, iron, molybdenum, cobalt, copper, manganese or lanthanum as a co-catalyst, titanium white powder as a carrier component and aluminum oxide as an auxiliary molding agent; preparing co-catalyst ion salt into a saturated solution; immersing the titanium white powder carrier into the co-catalyst solution according to the equal volume; after drying and pulverizing, uniformly mixing with the auxiliary molding agent aluminum oxide; uniformly stirring a tungsten zirconium ion saturated solution of the main catalyst component, an organic molding agent and a powder material, mixing, ageing and extruding and molding; and drying and roasting to obtain an integral honeycomb catalyst. The catalyst provided by theinvention has the advantages of relatively good high-temperature denitrification effect and thermal stability, toxin-free components, environment friendliness, simple preparation technology and the like; and the environment-friendly type high-temperature denitrification catalyst is especially applicable to removal of high-temperature NOx in tail gas of high-speed diesel engines and denitrification of fixed-source high-temperature tail gas of a petrochemical industry and the like.

The present invention discloses a paint remover for a metal surface. The paint remover is characterized by comprising the following components, by weight, 30-70% of dichloromethane, 5-25% of phenol, 1-5% of paraffin, 5-25% of benzyl alcohol, 2-10% of an organic acid, 1-6% of methyl cellulose, 0.5-3% of an emulsifier, 0.3-1% of a corrosion inhibitor LAN-826, and 10-30% of water. The metal paint remover of the present invention has characteristics of low solvent evaporation, good paint removing effect, rapidness, low use cost, and no corrosion on metal substrates, and can be widely applicable for paint layer removing of surfaces of carbon steel, stainless steel, copper, aluminum and other metal substrates.

The invention relates to a method for removing nitrogen oxides in waste gas or flue gas, comprising the following steps of: connecting an absorbing tower in series on a waste gas or flue gas conveyingpipeline at the front of an exhaust pipe, adding NO2 at the front of the absorbing tower and introducing the NO2 into flue gas or waste gas flow for mixing after being metered, then using a removingagent to treat the mixed gas by absorbing and removing of the absorbing tower with the removing agent and then discharging the mixed gas from the exhaust pipe; and adopting the following technical scheme: connecting the absorbing tower in series on the waste gas or flue gas conveying pipeline, connecting a nitrogen dioxide cylinder laterally at the front of the tower to directly add NO2 into the waste gas or flue gas conveying pipeline or connect a catalytic converter and an oxidizer laterally at the front of the absorbing tower, oxidizing NH3 released by a liquid ammonia cylinder into NO2 which is then mixed in the flue gas or waste gas conveying pipeline, and then carrying out absorbing and removing treatments by the absorbing tower. The method overcomes the defects that the existing method for denitrifying and denitrating waste gas or flue gas has complex treating technique, high cost, large waste and higher condition and requirements on treated flue gas and waste gas and the like,is applicable to denitration of flue gas and waste gas of nitrogen oxides containing nitric oxide as main material, and is especially applicable to removing nitrogen oxides of flue gas of a boiler.

The invention discloses a method for deoxidizing a low-concentration oxygen-containing coal bed gas. The method comprises the following steps: preheating a fixed bed deoxidization reactor; feeding the oxygen-containing coal bed gas into the reactor after penetrating through a flame arrester, a preheater and a preheater bypass; carrying out deoxidization reaction when the reaction temperature is 350-650 DEG C, the operation pressure is 0-0.4MPa and the gaseous hourly space velocity is 2,000-20,000h<-1>; feeding a hot deoxidized coal bed gas into the preheater and exchanging heat with a cold oxygen-containing coal bed gas; and feeding the cooled oxygen-containing coal bed gas into a cooler, cooling and dewatering, and feeding to a coal bed gas delivery pipeline. The method has the advantages of being good in safety, good in deoxidization effect, low in investment, convenient to operate and low in operation cost.

The invention provides a three-dimensional composite oxide catalyst for removing NO and coal smoke particles simultaneously and a preparation method and application thereof.The preparation method comprises the steps that under the stirring condition, a cerium source, an iron source and a zirconium source are dissolved in an organic solvent, the mixture is stirred to be uniform at the temperature of 20 DEG C to 45 DEG C, and a precursor solution is formed; a template agent is weighed and added to the precursor solution to be dipped, and then suction filtration and drying are carried out; solids obtained through drying are heated in a heating furnace for the first time and heat preservation is carried out, and then the solids obtained through drying are heated for the second time and heat preservation is carried out, and the three-dimensional composite oxide catalyst is obtained.The three-dimensional composite oxide catalyst is a cerium, iron and zirconium composite oxide, and the composition of the catalyst is Ce0.9-xFexZr0.1O2, wherein x ranges from 0.1 to 0.4.According to the catalyst, the temperature at which the coal smoke particles are combusted to be converted into CO2 and the temperature for NO conversion can be reduced to the same range, meanwhile, the NO conversion rate is increased, and the activity of catalytic coal smoke combustion is improved.

The invention provides an environment-friendly aqueous paint remover. The environment-friendly aqueous paint remover is characterized by being prepared from, by weight, 15-20% of phenylcarbinol, 20-28% of paratoluenesulfonic acid sodium salt, 6.0-8.0% of potassium hydroxide, 3.0-4.0% of sodium gluconate, 2-5% of a cosolvent and 30-40% of tap water. The environment-friendly aqueous paint remover has the advantages of being environmentally friendly, free of toxicity, free of damage to base materials, capable of being repeatedly applied and low in integrated cost.

The invention provides a bacterial strain with heterotrophic nitrification and aerobic denitrification functions and application. The bacterial strain is (Achromobacter xylosoxidans) pf1, the bacterial strain is preserved in the China Center for Type Culture Collection, and the preservation number is CCTCC NO: M2021273. The bacterial strain can synchronously perform nitrification and denitrification for nitrogen removal by taking organic carbon as a carbon source under an aerobic condition, and is suitable for removal of organic wastewater containing ammonia nitrogen, nitrate and nitrite. In the ammonia nitrogen wastewater with the initial concentration of 175 mg/L, the total nitrogen removal rate can reach 100%, the accumulation of intermediate products is less, and secondary pollution is avoided; in nitrate or nitrite wastewater with the initial concentration of 100 mg/L, the total nitrogen removal rate can reach 87.1% or 65.1%. After the industrial turtle breeding wastewater is treated, nitrogen and phosphorus in the industrial turtle breeding wastewater can be remarkably removed.

The invention relates to removing equipment for trace metal magnetic impurities in ceramic powder, belongs to the technical field of high-purity ceramic powder preparing, and particularly relates to a full-automatic wet process high-gradient magnetic field magnetic separation device. The device comprises a ladder, a hopper, a stirring tank, a magnetic separation machine, a diaphragm pump, a concentrate collecting tank, a tailing tank, an automatic control box, other control valves and the like. The full-automatic wet process high-gradient magnetic field magnetic separation device is a magnetic separation device capable of achieving automatic control, has high feasibility and reliability and is high in control precision. The background magnetic field and the gradient magnetic field of the magnetic separation device are large and adjustable, the maximum magnetic field gradient is higher than 1,000 T, and the magnetic separation device is suitable for removing high-content metal impurities and can also be suitable for removing trace metal impurities. Water or absolute ethyl alcohol can be adopted in the magnetic separation device to serve as media, and the application range is wider.