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201 results about "Lead phosphate" patented technology

Technology of removing lead and recycling rare earth from saponified wastewater generated during process of rare earth extraction

The invention discloses a technology of removing lead and recycling rare earth from saponified wastewater generated during the process of rare earth extraction. The technology comprises the following steps: (a) making saponified wastewater which is generated during the process of rare earth extraction go through an oil separation tank to remove the oil; (b) adding a NaOH solution, adjusting the pH to 10.5-13, and separating the solid and the liquid to obtain a supernate containing lead and rare earth precipitate; (c) subjecting the precipitate to plate-frame pressure filtration to obtain press filtrate and pressure-filtered residues; or dissolving the rare earth precipitate by hydrochloric acid or an acidic extractant to obtain a chlorinated rare earth solution, and the extracting rare earth from the chlorinated rare earth solution; (d) adding a Na3PO4 solution into the supernate and / or the press filtrate to obtain lead phosphate precipitate and supernate, wherein the content of total Pb in the supernate is not more than 0.2 mg / L; (e) press-filtering the precipitate, stacking the precipitate together, handing over the precipitate to factories, which has the qualification to process the dangerous solid wastes; acidifying the supernate, adding lime milk to remove the excess PO4<3->, then discharging the wastewater, wherein the content of total Pb in saponified wastewater is not more than 0.2 mg / L, the discharged wastewater can meet the requirements of Pollutant Discharge Standards Of Rare Earth Industry, and at the same time, the rare earth in the wastewater is effectively recycled.
Owner:GUANGDONG ZHUJIANG RARE EARTHS

PET (polyethylene glycol terephthalate) fiber/mulberry bark composite sound absorbing cotton and preparation method of PET fiber/mulberry bark composite sound absorbing cotton

The invention discloses PET (polyethylene glycol terephthalate) fiber/mulberry bark composite sound absorbing cotton, which comprises the following ingredients in parts by weight: 70 to 80 parts of PET fibers, 40 to 50 parts of mulberry bark fibers, 10 to 15 parts of emulsifying agents OP-9, 5 to 10 parts of peregal O-25, 80 to 100 parts of PP (propene polymer), 30 to 40 parts of EVA (ethylene vinyl acetate), 15 to 20 parts of nanometer barite powder, 10 to 15 parts of modified kieselguhr, 2 to 3 parts of stearic acid, 5 to 8 parts of dioctyl phthalate, 4 to 6 parts of decabromodiphenyl ether, 2 to 3 parts of tristearin, 1 to 2 parts of vinyltriethoxysilane, 2 to 3 parts of calcium stearate, 1 to 2 parts of dibasic lead phosphate, 0.5 to 1.5 parts of anti-ageing agents OD (octyl decyl) and 1 to 2 parts of antioxidants DLTP (dilauryl thiodipropionate). The sound absorbing cotton prepared by the invention has the advantages that the appearance evenness is good, the thickness is uniform, the hand feeling is soft, the product bonding degree is good, the tensile performance is high, the sound absorbing performance is excellent, the flame retardant effect is good, and the like.
Owner:芜湖跃飞新型吸音材料股份有限公司

Method for solidifying and stabilizing fly ash through synergy of ardealite and red mud

The invention relates to the technical field of resource utilization of bulk industrial solid wastes, in particular to a method for solidifying and stabilizing fly ash by synergy of ardealite and red mud, which comprises the following steps: uniformly mixing washing liquid and fly ash to obtain fly ash slurry; mixing and stirring fly ash, mineral powder, an additive ardealite powder and red mud powder to prepare a curing agent; and naturally curing the fly ash slurry for 2-24 hours, and adding a curing agent into the fly ash slurry to further cure and stabilize the heavy metals in the fly ash. According to the method disclosed by the invention, in the fly ash curing process, the alkalinity of the fly ash is neutralized by utilizing purified ardealite water washing liquid, soluble phosphoric acid, hydrogen phosphate radicals, dihydrogen phosphate radicals and fluorine ions react with Pb<2+> to generate stable mineral precipitates such as lead phosphate, lead fluorophosphate and lead chlorophosphate, so that the effect of curing and stabilizing the fly ash is achieved, and the leaching rate of lead in the fly ash is reduced. The curing agent is added into the fly ash slurry, and is excited to react to generate a hydration product to secondarily cure / stabilize heavy metals in the fly ash.
Owner:CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY

Electrochemical immune sensor for phosphating protein

The invention relates to an electrochemical immune sensor for phosphating protein. In the electrochemical immune sensor, a magnetic nanometer-antibody composition MPs-p53<15>Ab1 is used as an adsorbent to separate the phosphating protein, a carbon nanometer sphere CNS is used as a carrier, lead phosphate-apoferritin (LPA) and a phosphating protein antibody p5315Ab2 are modified on the surface of the CNS, and thus, LPA-p53<15>Ab2-CNS nanometer complexing agent is prepared for detecting signal amplification. According to the sandwich immunoassay principle, the content of the phosphating protein to be detected is in proportion to the captured LPA-p5315Ab2-CNS, and the content of lead ions encapsulated in LPA is detected according to a dissolving volt-ampere method to measure the concentration of the phosphating protein in a sample. The method has the advantages of simplicity and convenience for operation and simple and efficient separation, and the advantage that an integral immunologic reaction is finished in an epoxy (EP) tube; a large number of LPA signal molecules are introduced by taking the CAN as the carrier, and each LPA molecule contains a large number of Pb<2+>, so the sensitivity of detection is improved; and the dissolved Pb<2+> is used as a detection signal without adding an enzyme substrate, so the electrochemical immune sensor is a reagent-free sensor. In the electrochemical immune sensor for the phosphating protein, the linear concentration range of the phosphating protein phosphor-p53<15> is from 0.02 to 20 ng mL<-1>, and the detection limit is 0.01 ng mL<-1>.
Owner:HUAZHONG NORMAL UNIV

Ageing resistant cable sheath material

The invention discloses an ageing resistant cable sheath material which comprises the following raw materials in parts by weight: 95-101 parts of neoprene A-30, 20-30 parts of nano calcium carbonate, 10-16 parts of modified filler, 6-9 parts of ethylene bis stearamide, 4-6 parts of epoxidized soybean oil, 15-20 parts of chlorinated polyethylene, 2-3 parts of diphenylamine, 10-15 parts of potassium feldspar powder, 2-4 parts of dibasic lead phosphate, 2-3 parts of antioxygen DSTP, 3-5 parts of barium stearate, 0.8-1 part of a cross-linking agent ATC, 0.8-1 part of an accelerant TMTD and 1-2 parts of dipentamethylenethiuram. The prepared ageing resistant cable sheath material has excellent performance, size stability, low shrinking percentage, has strong tensile strength, strong tearing strength, strong resilience force performance and also has good oil resistance, heat resistance, sunlight resistance, ozone resistance, acid/alkali resistance and chemical reagent resistance; and the modified filler has good dispersity and surface tension, can further improve the tensile strength and stress at definite elongation of the cable sheath material and reduce heating and compression set of the cable sheath material, is capable of slowing down the aging speed of the cable sheath material, resisting acid and alkali corrosion and reducing production cost.
Owner:ANHUI KANGLIYA CO LTD

Environmental stress crack-resistant polyethylene sheath material for power wire and preparation method thereof

The invention discloses an environmental stress crack-resistant polyethylene sheath material for a power wire and a preparation method thereof. The environmental stress crack-resistant polyethylene sheath material is prepared from the following substances in parts by weight: 80-100 parts of linear low-density polyethylene, 15-20 parts of polystyrene resin, 10-15 parts of polyphthalamide, 4-8 parts of dimethyl silicon oil, 2-3 parts of dibasic lead phosphate, 1-2 parts of calcium stearate, 1-2 parts of zinc stearate, 0.5-1 part of antioxidant 1010, 1-2 parts of antioxidant 168, 2-4 parts of ethylene distearate amide, 4-6 parts of chlorinated paraffin and 3-5 parts of pine tar. The sheath material has the advantages of excellent environmental stress crack resistance, high-low temperature resistance, acid-base resistance, salt mist resistance, ozone aging resistance, ultraviolet radiation resistance, abrasive resistance and tensile strength, is capable of working normally in a working environment at a temperature ranging from 60 DEG C below zero to 105 DEG C, is non-deformable and non-cracking in long-time use, is safe and reliable and is applicable to internal and external sheathes of overhead power wires in the outdoor.
Owner:天长市富达电子科技股份有限公司

Production technology of simulated beautifying plastic module for human face

The invention discloses a production technology of a simulated beautifying plastic module for a human face, which comprises the following steps: mixing a certain proportion of toner, fluorescein, resorcinolphthalein, white toner, lipoprotein, dibasic lead phosphate and tribasic lead sulfate; milling the mixture with a small amount of dioctylphthalate to be uniformly mixed and stirred with a proper amount of dioctylphthalate, PVC resin, stabilizer A, heat-resistant oil A, zinc powder and calcium powder in a storage tank of a pulping machine; filtering impurities in a filtering basin, and depositing and despumating serous fluid; then, pouring the filtered serous fluid into a heated mould, and pouring the redundant serous fluid out after the serous fluid stays in the mould for 60-75 seconds; putting the mould in a rubber stove to be heated for 60-120 seconds, taking the mould out, putting the mould in water with room temperature to be cooled for 10-15 seconds, and then, forming a beautifying module; and finally, soaking the beautifying module in a lucent softener for 5-10 minutes to enable the beautifying module to be smoother and softer. The beautifying module produced by the technology of the invention has the advantages of good simulated effect, repeated use, abundant colors and various shapes.
Owner:HENAN REBECCA HAIR PRODS TNC +1
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