397 results about "Lead salt" patented technology

The invention discloses a lead regeneration method for recovering lead paste from a waste lead acid storage battery by a wet method, and belongs to the field of lead regeneration from the lead paste of the waste lead acid battery. The lead regeneration method comprises the following steps of: adding the lead paste into an acid liquor reaction kettle containing a catalyst to perform oxidation reduction reaction on lead and lead dioxide in the lead paste to obtain soluble lead salt solution; meanwhile, reacting lead oxide with acid to obtain lead salt; separating to obtain insoluble filter residue mainly containing soluble lead salt solution and lead sulfate; and electrolyzing the lead salt solution to obtain lead, oxygen and acidic electrolyte, wherein the electrolyte can be returned to a leaching process for recycling, and the filter residue A is treated by the conventional reselection process to obtain the lead sulfate and the filter residue D. According to the lead regeneration method, the production cost is reduced, and high comprehensive lead recovery rate is obtained.

The invention discloses a three-layer noise reduction drainage pipe, which comprises a drainage pipe body, wherein the drainage pipe body is a three-layer co-extrusion composite pipe formed by an impact-resistance outer layer, a noise reduction middle layer and an impact-resistance inner layer through co-extrusion. The noise reduction middle layer is a sound-absorbing middle layer or a sound insulation middle layer made of expandable polyvinyl chloride composition materials. The above layers are prepared with the following materials. The impact-resistance outer layer is made of polyvinyl chloride resin, chlorinated polyethylene, dibasic lead phosphite, tribasic lead sulfate, calcium stearate, lead stearate, paraffin, PVC processing and modifying agent, active light calcium carbonate, titanium dioxide and dioctyl phthalate. The sound-absorbing middle layer is made of polyvinyl chloride resin, chlorinated polyethylene, lead salt stabilizer, calcium stearate, stearic acid, paraffin, dioctyl phthalate, active light calcium carbonate and barium sulfate. The sound insulation middle layer is made of polyvinyl chloride resin, methacrylic ester polymer and inorganic foaming agent. Compared with the outer layer, the impact-resistance inner layer comprises the same components with the outer layer, except that PVC is adopted instead of polyvinyl chloride resin. The noise of the drainage pipe can be effectively reduced and the intensity of the drainage pipe is enhanced.

The invention discloses a method for recovering a lead-containing raw material by using a wet process. The method comprises the steps: (1) leaching the lead-containing raw material by using a solution, adding a reducing agent to reduce lead dioxide or lead orthoplumbate in the lead-containing raw material into a soluble lead salt, after a lead compound is completely dissolved, filtering the solution, and separating to obtain a filtrate A and an insoluble substance, wherein the solution contains sulfate, a complexing agent and a catalyst; (2) adjusting the pH value of the filtrate A, separating to obtain lead sulfate and a filtrate B, and returning the filtrate B to the step (1) after sulfate radicals are replenished and the pH value is adjusted; (3) directly using lead sulfate as battery materials or commodities, subjecting a sulfate-containing alkaline solution and lead sulfate to reaction, and separating to obtain basic lead sulfates and a filtrate C, wherein the basic lead sulfates include tribasic lead sulfate and tetrabasic lead sulfate. The method can be used for purifying the lead-containing raw material to form lead sulfate and basic lead sulfates directly used for producing lead-acid batteries, thereby being an environment-friendly wet-process recovery method.

In an example of a method for recovering lead from a lead material including lead sulfide, methane sulfonic acid is selected as a leaching acid for the lead material. The lead material is exposed to a solution including the methane sulfonic acid and i) ferric methane sulfonate or ii) oxygen, which leaches lead from the lead sulfide in the lead material, and generates a liquid leachate including a lead-methane sulfonate salt. The liquid leachate is purified, and lead is recovered from the purified liquid leachate using electrolysis.

The invention relates to a preparation method of compound thermal stabilizer in plastic processing additive and pertains to the technical field of plastic processing additive. The invention discloses a ternary hydrotalcite-rare earth-Ca/Zn innoxious compound thermal stabilizer and a preparation method thereof. The invention comprises the materials of the stabilizer such as ternary hydrotalcite, organic rare earth compound, Ca compound and Zn compound, a synthetic preparation method thereof and an optimal compounding method of ternary hydrotalcite-rare earth-Ca/Zn innoxious compound thermal stabilizer. The ternary hydrotalcite-rare earth-Ca/Zn innoxious compound thermal stabilizer provided by the invention serves as a new generation high-efficiency innoxious stabilizer, can replace the traditional lead salt and expensive organic stannum thermal stabilizer and can be widely applied to the fields of PVC pipe material, section material, wire and cable, medical instrument and membrane, etc.

The invention discloses a preparing method for nano micron lead sulfate with electrochemical activity and a method adopting the lead sulfate to prepare a lead-acid cell. The preparing method for nano micron lead sulfate includes the following steps: using a morphological control agent for controlling the crystal growth of lead sulfate; enabling a water solution of soluble lead salt to react with a water solution of soluble sulfate/sulfuric acid, or enabling an aqueous dispersion of lead elementary substance/insoluble lead compound to react with a water solution of sulfuric acid in a clash flow reactor; finally obtaining the nano micron lead sulfate. The preparing method for the lead-acid cell includes the following steps: adopting the lead sulfate as active substances for an anode and a cathode; preparing a positive plate and a negative plate through adding fibers, a conductive agent, an expanding agent and the like; adding membranes between the two poles; then placing the two plates in a cell box for battery charging and formation. The invention has the advantages that the nano micron lead sulfate is high in electrochemical activity; the performance of the lead-acid cell is high and the service life of the lead-acid cell is long after the nano micron lead sulfate is adopted as the active substances of the lead-acid cell; besides, the preparing methods for the lead sulfate and the lead-acid cell are simple and feasible and have the characteristics of energy conservation and environmental protection.

The invention discloses a lead compound nano-powder preparation method for recovery and manufacture of lead-acid battery. The lead compound nano-powder preparation method comprises the following steps that 1, lead, a lead salt or waste lead-acid battery lead paste reacts with one or more organic or inorganic compounds to produce a soluble lead salt solution or a lead hydroxide solution; 2, one or more alkalis or caustic alkalis are added into the soluble lead salt solution, or a part or excess amount of H2CO3 or CO2, sulfuric acid, one or more organic acids or their salts are added into the lead hydroxide solution, and 3, lead oxide or lead hydroxide precipitates obtained by the step 2 are filtered and are subjected to drying and pyrolysis to form the lead compound nano-powder. The lead compound nano-powder preparation method realizes environmentally friendly recovery and production, has low energy consumption, greatly reduces a production cost, and shortens a production period. The lead compound nano-powder obtained by the lead compound nano-powder preparation method is conducive to improvement of technical product performances.

The invention discloses a preparation method of a Pb oxide nano powder for recovery and manufacture of a lead acid battery. The method comprises the steps of: (1) reacting lead salt or waste lead acid battery lead paste with an organic or inorganic compound capable of complexing with Pb atom / ion, so as to realize desulphurization or reloading of acid radical; and (2) carrying out treatment processes of filtering, drying for removing water and heating for decomposition, so as to obtain the Pb oxide nano powder. The method of the invention realizes an environment-friendly and energy-efficient recovery and production process with substantially reduced production cost; meanwhile, the prepared Pb oxide powder is beneficial for enhancement of product performance.

This application relates to an apparatus and method for providing snapshot action thermal infrared imaging within automated process control article inspection applications. More specifically, it pertains to the use of snapshot mode lead salt area-array imaging sensors (20) as the imaging front-end in high-speed machine vision inspection systems (12). the relatively low-cost, good measurement sensitivity at temperatures consistent with thermo-electric cooling means, and the ability to be operated in snapshot mode enables lead salt-based image acquisition sensors (20) to be used in a variety of automated process control and article inspection applications.

The invention discloses PVC (polyvinyl chloride) power pipeline material. The PVC power pipeline material comprises, by weight, 100 parts of polyvinyl chloride resin 0.1-0.2mm in particle size, 20-30 parts of calcium carbonate 300-mesh to 700-mesh in particle size, 6-10 parts of impact modifier ACR, 3-6 parts of composite lead salt stabilizer, 0.5-2 parts of lubricant oxidized polyethylene wax, and 4-10 parts of nano-scale inorganic flame retardant. The PVC power pipeline material is high in flame retardancy with oxygen index up to more than 40. PVC power pipelines of the power pipeline material is high in rigidity, heat resistance and ageing resistance, low in manufacturing cost and simple in processing technique.

The invention relates to a preparation method of a low-toxic environment-friendly type novel precious metal beneficiation agent. Raw materials of the low-toxic environment-friendly type novel precious metal beneficiation agent comprise a cyanate, sodium hydroxide, sodium sulfate, sodium ferrocyanide, a bromide, and a lead salt. The preparation method comprises following steps: sodium cyanate, sodium hydroxide, sodium sulfate, and sodium ferrocyanide are mixed at a certain ratio; an obtained mixture is delivered into a smelting pot which is heated to be slightly red, and is heated to 650 to 750 DEG C so as to obtain a fused material, temperature is maintained to be 750 DEG C for 30 to 50min of reaction, and then an obtained product is collected and cooled; the obtained product is smashed, the bromide and the lead salt are added for stirring, and the environment-friendly type precious metal beneficiation agent is obtained via combination. The environment-friendly type precious metal beneficiation agent can be widely used for precious metal beneficiation metallurgy of nonferrous metals ores, contains no hypertoxic compounds, is safe for human and animal, and is friendly to the environment. Compared with other metal beneficiation agents, the environment-friendly type precious metal beneficiation agent is excellent in effects, stable in performance, and low in production cost; the preparation method is simple; and environmental protection can be realized.

The invention relates to PVC (Polyvinyl Chloride) stone-bumping resistant paint and a preparation method thereof. The PVC stone-bumping resistant paint is formed by mediating, reacting and finely rolling dioctyl phthalate, dibutyl phthalate, dioctyl sebacate, light calcium carbonate, heavy calcium carbonate, nano active calcium carbonate, zinc stearate, barium stearate, organic bentonite, polyamide resin, carbon black, titanium pigment and PVC resin. The low-temperature flexibility of the PVC stone-bumping resistant paint can be improved by compounding three plasticizers of the dioctyl phthalate, the dibutyl phthalate and the dioctyl sebacate; the thixotropic performance of the paint can be improved by combining the organic bentonite with the nano active calcium carbonate; the adhesive force and the high-temperature yellowing resistance of the paint can be enhanced by combining the polyamide resin with heat stabilizers of the zinc stearate and the barium stearate and the paint has no foaming, crack and falling after baked at 210DEG C, so that the coating effect of the automobile body can be improved and the service life of the automobile body can be prolonged. The PVC stone-bumping resistant paint has no lead salt heat stabilizers and avoids the damage to the environment and human body; and the produced PVC stone-bumping resistant paint has excellent performance and can carry out the multilayer anticorrosion protection of the body and the bottom of the automobile.

The invention discloses a preparation method of a composite oxide. In the method, one or more of ammonium salt, magnesium salt, calcium salt, strontium salt, aluminum salt, lead salt, titanium salt, chromium salt, manganese salt, ferric salt, cobalt salt, nickel salt, copper salt, zinc salt, zirconium salt, silver salt, lanthanum salt and cerium salt are dissolved in water to form a solution A; and one or more of ammonia water, ammonium carbonate, sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, sodium silicate and sodium aluminate are dissolved in water to form a solution B. The solution A and the solution B are quickly mixed, stirred and ground after being cooled, and water is solidified quickly in the process of generating sediments so as to form a powder with ice and the sediments highly dispersed. The powder is aged, washed, dried and baked to obtain target material. In the preparation process, liquid-solid phase transformation is quick so as to ensure high dispersion of different components, and the synthetic material has the advantages of high specific surface, low bulk density, high catalytic performance and the like. The method has the characteristics of simple operation and low cost, and is generally suitable for synthesizing a variety of composite oxides.

The invention discloses a manufacturing heat stability improving method of chlorinated polychloroethylene resin, which is characterized by the following: adding the composition of 3-5% Ca/Zn composite stabilizer and 2-5% hydrotalcite in the CPVC manufacturing course corresponding to 100% chlorinated polychloroethylene resin; replacing present organic tin system and composite lead salt system; possessing excellent static and dynamic heat stability without toxicity.

The invention discloses a cathode electrode composite material, which comprises a plurality of ferriferous oxide particles and a conductive aid which is selected from copper, cobalt, nickel, tin, antimony, bismuth, indium, silver, gold, lead, cadmium, carbon black, graphite, cupric salt, cobalt salt, nickel salt, tin salt, antimonic salt, bismuth salt, indium salt, silver salt, gold salt, lead salt, cadmium salt, cupric hydroxide, cobalt hydroxide, nickel hydroxide, tin hydroxide, stibine hydroxide, bismuth hydroxide, indium hydroxide, silver hydroxide, gold hydroxide, lead hydroxide, cadmium hydroxide and a group consisting of the combinations. When applied to an electrochemical device, the cathode electrode composite material can show high charging and discharging characteristics and high electric capacity. Moreover, the invention provides a preparation method of the cathode electrode composite material and an electrochemical device applying the same.

A luminescent plastic product and its production are disclosed. The plastic product consists of polyvinyl chloride resin 100 proportion, plasticizer 1-80 proportion, stabilizer 0.1-6 proportion, rare-earth long-acting fluorescent powder 0.5-6 proportion, and coupler 1-4 proportion. The plasticizer is made from dibutyl phthalate, dioctyl ester, non-toxic plasticizer or flame-retardant plasticizer or its combination; stabilizer is made from lead salt, metal soap, organic tin, composite stabilizer and ultraviolet absorbent or its combination; rare-earth long-acting fluorescent powder is strontium aluminate. The process is carried out by furnishing, forming, adding mixture into mono-screw extruder or bi-extruder, heating, extruding into products with various shapes by mould ram head, vacuum sizing, cooling by water, inspecting and packing. It can be used for household furniture, indoor and outdoor ornaments, door and window seal and road sign. It's economical and practical, has long life and better luminescent effect and saves resources.

The invention provides a Ca/Zn compound heat stabilizer, which is prepared by synthesizing a Ca/Zn main stabilizer by using higher fatty acid, ZnO and Ca(OH)2, matching with hydrotalcite and similar hydrotalcite substances and adding proper amount of auxiliary stabilizer, antioxidant, ultraviolet absorber, lubricant and talcum powder, wherein the Ca/Zn main stabilizer accounts for 40-60 percent, the hydrotalcite and similar hydrotalcite substances account for 7-20 percent, the auxiliary stabilizer accounts for 8-30 percent, the antioxidant accounts for 0.1-2.5 percent, the ultraviolet absorber accounts for 0.1-1.5 percent, the lubricant accounts for 1-15 percent and the calcium powder accounts for 1-15 percent, and the percent refers to weight percent. In the stabilizer, the hydrotalcite and similar hydrotalcite substances are mixed according to a certain proportion, thereby the heat resistance is very good, and the color changing time of Congo red can reach more than 80 min. The stabilizer can effectively restrain the degradation of polrvinyl chloride (PVC) material, which is caused by physical actions during forming and processing, such as heating, rubbing, cutting and the like, and exterior conditions in using process, such as light, heat, oxygen and the like, avoid the degradation or aging of the product and prevent the performance reduction of the PVC products. The invention can replace traditional lead salt and organo-tin heat stabilizer with expensive price, can be widely applied to the aspects of PVC processing and forming, and has remarkable social benefits and economic benefits.

Disclosed are dispensation of perchlorinated polyvinyl chloride wave-shaped pipe and its productive technique, especially that for high volume cable and its productive technique. The dispensation (mass ratio) is: perchlorinated polyvinyl chloride resin(50-80), polyvinyl chloride resin (20-50), compound lead salt stabalizer (4.5-7.5), stearic acid (0.6-0.8), polyethylene(0.3), paraffin(0.3), calcium carbonate (4-10) and anti-impact ACR (6-8). Its productive technique is: mix the mixture for 10-13min, till the temperature reaches 120-135deg.c, cool it to be 45-55deg.c and feed the material, finally press and plasticize to form the product in 170-185deg.c. The invention produces the wave-shaped pipe whose hot deformative temperature is not lower than 93deg.c, with sentific dispensation and reasonable productive technique, which can solve the protective jacket problem existing in high volume cable underground.

The present invention provides a method for stachyose hydrate extraction. Leaf bamboo shoot or Yintiao are cleaned, grinded and soaked, and then are Paste-pasteurized. The plant protein of the leaf bamboo shoot or Yintiao is coagulated. The fruit compound enzyme which is ten thousandth of the weight of the extraction is added into the extraction for degumming. After the degumming, the solution is filtered by 10000D ultrafiltration membrane, and then is bleached and concentrated in vacuum, and is dried into stachyose hydrate powders. The method solves the problem of the use of chemical reagents which generates lead salt residue. The method shortens the processing time. The production rate of the method is more than 90 percent and the purity is of 95 percent. Raw materials utilization in the method is high.

The invention discloses a method for preparing a high-purity lead compound through wet recovery and impurity removal of waste lead plaster. The method comprises the following steps that 1, strong basecontaining Na and K elements is used as a basic desulfurizer for carrying out normal-temperature desulfuration on waste lead paster, the obtained desulfurated lead paster reacts with an acid leachingagent mixed with a hydrogen peroxide reducing agent, after reaction is finished, a lead salt solution is obtained by adjusting the pH value and carrying out filtration according to the variety of theacid leaching agent, or the lead salt solution is obtained through direct filtration; 2, the lead salt solution is subjected to liquid phase reaction conversion to prepare a solid phase lead compound, and lead oxide and other products can also be produced through follow-up roasting. By means of the whole process technological set of wet recovery and parameter conditions adopted by key technologysteps are improved and optimized, the high-purity lead compound (and high-purity lead oxide) can be prepared from waste lead paster through an acid leaching wet recovery method, and the problems thattwo impurity elements Ba and Fe are high in content and not likely to be removed are solved.

The invention discloses a preparation method for modified actived carbons. The modified active carbons are actived carbons modified by adopting hydrogen inhibitor; and the hydrogen inhibitor is lead oxide loaded on the surfaces of the actived carbons. The preparation process comprises the following steps: firstly, lead ions are absorbed by using the actived carbons; then the lead ions are deposited on the surfaces of the actived carbons by using alkali; and finally, lead hydrogen is decomposed to lead oxide through the heat treatment, and the lead oxide is loaded on the surfaces of the actived carbons; the actived carbons, lead salt and the alkali are chemically reacted through the ball milling method, and are treated at the high temperature under the protecting air environment to prepare the modified actived carbons. The method has the advantages of simple preparation technique, short production period, facilitation of industrial production, lower equipment investment, environmental friendliness and wide application, and can increase the specific capacitance of the active carbons.

The invention relates to a preparation method for an anti-radiation ethylene-vinyl acetate copolymer composite material. The steps comprises: weighing 100 parts of lead salt, 1-5 parts of coupling agent and 15-50 parts of solvent by weight, wherein the solvent is one or more of water and ester organic solvents, dissolving the coupling agent into the solvent, then adding the solution into the lead salt, stirring and evenly mixing the solution, activating the solution at constant temperature to obtain surface modified lead salt; and weighing 100 parts of ethylene-vinyl acetate copolymer, 50-250 parts of surface modified lead salt, 0-10 parts of polar monomer, 0-1 parts of initiator, 0.1-2 parts of antioxygen and 0-15 parts of lubricating agent, stirring and evenly mixing the mixture, fusing and compositing the mixture to obtain the composite material. The anti-radiation ethylene-vinyl acetate copolymer composite material prepared through the method of fusing forming processing can serve as an anti-radiation coating or gel film to be used in textile and to be formed into clothes and cord fabric and the like with the anti-radiation function, and has wide application prospects.