45results about How to "Easy to remove by filtration" patented technology

The invention relates to a heavy metal trapping agent in the field of environment protection. The heavy metal trapping agent is prepared from polymer containing a polyethylene diamine tetra-acetic acid unit, wherein by weight percentage, the content of the polyethylene diamine tetra-acetic acid unit is 45-100% of polymer; the polymer is homopolymer or copolymer; the polyethylene diamine tetra-acetic acid unit is a form of sodium salt, potassium salt or ammonium salt. The defect that a chelate compound of existing ethylenediamine tetra-acetic acid and the heavy metal is generally soluble is overcome, and the provided heavy metal trapping agent has strong heavy metal chelating power, and the solubility can be controlled by pH of the solution; moreover, the trapping agent is free of toxicity.

The invention provides equipment for treating waste emulsion. The equipment is characterized by comprising a floating oil removal device, an oil-water separation device, and an electrochemical treatment device, wherein the floating oil removal device is used for removing floating oil from to-be-treated waste emulsion, and removing the floating oil floating on the level of the waste emulsion; the oil-water separation device is used for performing oil-water separation to the waste emulsion without floating oil, and removing the dispersion oil suspending in the waste emulsion; and the electrochemical treatment device is used for performing electrochemical treatment to the waste emulsion which is subjected to oil-water separation treatment, so that emulsifying oil and dissolved oil are flocculated, wherein an electrified aluminum plate and a nanoceramic membrane are used for performing electrochemical treatment; a disconnected nanoceramic membrane is used for performing ultrafiltration treatment to the stand and precipitated crude emulsion. After being treated through the equipment, the quality of effluent water is good, and the effluent water can completely meet the emission limit requirement of a public sewage treatment system in Beijing Integrated discharge standard of water pollutants DB11/307-2013.

The invention discloses a pressure stabilizing type non-negative pressure water supply system which comprises a water inlet pipe, a water inlet pipe pressure stabilizing device, a water supply power combination device and a water supply pipe. The water inlet pipe pressure stabilizing device is integrally arranged on the water inlet pipe communicated with a municipal tap water pipe, and the water inlet pipe is supplied to all users after being treated and pressurized by the water supply power combination device; the water inlet pipe pressure stabilizing equipment comprises a high-level water tank, a hydraulic cylinder and a pressurizing barrel, the high-level water tank is communicated with the water inlet pipe through an L-shaped pipe, a water replenishing valve is arranged on the L-shapedpipe, the bottom of the high-level water tank is communicated with the pressurizing barrel through a folding pipe, a first electromagnetic control valve and a third check valve are arranged on the folding pipe, and a liquid level sensor is arranged in the high-level water tank; and an output shaft of the hydraulic cylinder is fixedly connected with a piston in the pressurizing barrel, the bottomend of the pressurizing barrel is communicated with the water inlet pipe through a pressurizing pipe, and a second electromagnetic control valve and a fourth check valve are arranged on the pressurizing pipe.

The invention discloses anti-corrosion secondary water supply non-negative pressure equipment. One end of a water conveying pipe is connected with a treatment tank; a granular activated carbon filterscreen is fixedly mounted at the top of a treatment tank; an annular fixing frame is fixedly connected to a position, which is located below the granular activated carbon filter screen, in the treatment tank; an annular fixing groove is formed in the bottom end of the annular fixing frame; an ion exchange resin filter element is mounted in the middle of the treatment tank; and the top end of the ion exchange resin filter element is fixedly connected with an upper mounting block. The structure is scientific and reasonable, the equipment is safe and convenient to use, by using the ion exchange resin filter element, free anions and cations in the water are removed, the pH value of water is reduced, corrosion of water to the equipment is reduced, water in the equipment will not be polluted bythe rusts, chlorides in the water can be absorbed by using the granular activated carbon filter screen, and the probability that the equipment is corroded is further reduced.

The invention discloses a method for recovering, treating and recycling quaternary ammonium base. According to the invention, the method overcomes disadvantages in conventional recovery and treatmentof quaternary ammonium base produced in preparation of p-aminodiphenylamine by using a nitrobenzene process; the method of the invention has an extra procedure of solvent extraction and recovery of p-aminodiphenylamine and macromolecular viscous organic substances in the quaternary ammonium base, thereby lowering the content of p-aminodiphenylamine and macromolecular viscous organic matters in theammonium base, reducing the viscosity of the recovered quaternary ammonium base, decreasing difficulties in desalting filtering of the recovered quaternary ammonium base, improving desalting effect on the recovered quaternary ammonium base and promoting normal implementation of subsequent condensation reactions and reduction reactions.

The invention discloses a preparation method by using amine and imine nitrogen methylation and application thereof. The preparation method comprises the following steps: A, adding an active carbon loaded platinum catalyst into a Schlenk tube, and after vacuumizing to replace argon, adding a solvent; B, under protection of argon, separately adding phenylsilane, an initial raw material and formic acid; C, stirring the whole reaction system at a certain temperature to react; and D, after reaction, adding ethyl acetate into the system to dilute, stopping the reaction by using a sodium hydroxide aqueous solution, performing extraction with ethyl acetate, separating out an organic phase, drying and filtering the organic phase, and performing rotatable evaporation to remove the solvent. Column chromatography is performed on residues by using ethyl acetate/petroleum ether mixed solvent to obtain a target product, wherein the ethyl acetate and petroleum ether are different in proportion. According to the application of the method in isotope labeled drug synthesis, the dosage of a catalyst is extremely low, the cost is quite low, and the method is suitable for large-scaled production, can be suitable for amine and imine with different substituents, and suitable for realizing methylation conveniently on nitrogen atoms in a natural product structure to prepare drug molecules.

The invention relates to an acidic sewage heavy metal trapping agent, which is prepared from the following raw materials by weight: 12-21 parts of sodium dimethyl dithiophosphate; 6-10 parts of sodiumdimethyldithiocarbamate; 3-6 parts of sodium thiosulfate; 1-3 parts of trisodium phosphate; 0.2-0.5 part of sodium nitrite; and 59.5-77.8 parts of water . The preparation process is simple, the operation is easy, the acidic sewage heavy metal trapping agent can be effectively subjected to chemical reaction with heavy metals in acidic sewage with a pH value of 0-5 to generate insoluble substancesinsoluble in a dilute acid solution, and almost can capture various heavy metals including Cu<2+>, Cd<2+>, Hg<2+>, Pb<2+>, Mn<2+>, Ni<2+>, Zn<2+>, Cr<3+> and Co<3+>. Precipitation is rapid, and afterthe acidic sewage is treated, the solid-liquid separation is rapid, simple and convenient.

The invention belongs to the technical field of wastewater treatment and particularly relates to a treating agent for removing heavy metals in wastewater; the treating agent is prepared from 30-60 parts of Chinese medicine fermentation broth, 20-50 parts of tannins, 15-35 parts of dipotassium phosphate, and 5-20 parts of sodium polyacrylate. The treating agent according to the invention has the advantages that various heavy metal ions can be removed at a time, a varieties of heavy metal ions can be treated, the removal rate reaches 99% and above, the national specified emission standard is met, the Chinese medicine fermentation broth and tannins are natural materials and have low secondary pollution caused to water, a treating method is simple, and treating cost is low.

The invention discloses a treatment method of A landfill leachate concentrate, specifically comprising the following steps of: (1) adding a heavy metal ion precipitation agent to a landfill leachate concentrate, stirring, standing, and filtering to obtain a concentrate I; (2) sequentially adding sodium sulfate and calcium sulfate into the concentrate I, and stirring to obtain a concentrate II; and(3) adding Portland slag cement or Portland fly-ash cement into the concentrate II, stirring, curing and landfilling. According to the invention, the Portland slag cement or Portland fly-ash cement is used to solidify the landfill leachate concentrate therein, thereby achieving the purposes of harmlessness and stabilization, and effectively solving the treatment problem of the landfill leachate concentrate.

The invention provides a method for neutralizing sulphur acidity by using refined lime, belonging to the field of sulfuric acid production processes. According to the technical scheme, the method comprises the steps of: adding the refined lime in melted liquid sulphur, stirring for reacting to generate micro-soluble calcium sulfate, and removing the calcium sulfate through a filter net. The method has the beneficial effects that the price of the refined lime is lower than that of sodium carbonate, thus the production cost is lowered for enterprises, and a neutralizing effect same as that of a method based on sodium carbonate is achieved, the production is ensured; and insoluble calcium sulfate is generated after the refined lime is used and insoluble calcium sulfate can be filtered and removed conveniently, thus the method is more convenient and rapid.

The invention discloses a processing technology of wall-broken glossy ganoderma tritici. The processing technology comprises the following steps of P1, selecting glossy ganoderma tritici raw materials; P2, obtaining cleaned raw materials; P3, obtaining cooked raw materials; P4, obtaining cooled raw materials; P5, obtaining molten raw materials; P6, obtaining mixed raw materials; P7, obtaining treated raw materials; P8, performing filtering to remove a solution to obtain wall-broken raw materials; and P9, drying the wall-broken raw materials to complete processing of the tritici, cooking and softening the tritici raw materials, then performing repeated liquid nitrogen freezing operation, treating spore walls through rapid thermal expansion and contraction characteristics, and then performing ultrasonic treatment by mixing sodium chloride particles, so that filtration and removal are convenient, and mixing is avoided. Besides, the wall breaking rate and treatment efficiency are effectively improved, the product quality is guaranteed, processing is convenient, and application and popularization are facilitated.

The invention relates to a method for determining thiocyanate in water containing an iron-cyanogen complex in a gold cyaniding process, and belongs to the technical field of thiocyanate determination.The method comprises the following steps: adjusting a sample solution to be acidic, adding 0.1 g of ferrous sulfate to form iron ferrocyanide precipitate, adjusting to be alkaline, adding 0.1 g of zinc sulfate to flocculate the precipitate, heating to boil for 20 minutes, taking down, cooling, fixing the volume to a 100mL volumetric flask, performing dry filtration, taking a proper volume of testsolution, and determining the content of thiocyanate by adopting an iron salt colorimetric method. Aiming at the water quality containing high-content ferricyanide complex, the invention successfullyfinds out a combined masking agent for masking the ferricyanide complex, finds out an organic solvent capable of inhibiting fading of thiocyanate, and solves the problem that thiocyanate in wastewater containing the ferricyanide complex cannot be accurately determined.