90results about How to "No pollution hazard" patented technology

The invention discloses a device system to recover and re-use the drilling mud, which comprises connected by turns: a storage tank to store the waste drilling mud, a vibration screen for coarse purification, a hydrocyclone to separate the mud conveyed by a mud pump and discharge the particulate from its lower end, a first-stage centrifuge for filter and purification, a microwave oven to dry the mud, a crusher to crush the mud again, and an automatic packaging machine to pack and recover the mud. This invention is simple and convenient, has low cost and no pollution danger, and brings hundred millions economic benefits every year.

The invention discloses a sorting and separation process for utilizing slag comprehensively. The process comprises the following steps of: crushing pretreated original slag in a wet method, performing magnetic separation to select crushed iron granules, and performing gravity separation on slag charge, so that light products, heavy products and intermediate fine materials are separated out by taking water as a separating medium; and purifying metal subjected to the gravity separation by an ore dressing table concentrator, and sorting the metal. In the process, four kinds of products are sorted by combining crushing equipment and gravity separation equipment under the hydraulic action, and also cay be recycled, wherein like natural gravels, the sorted intermediate fine material sand is a high-quality material for producing high-quality building materials; and in the key point of the process, metal substances in the slag are sorted and separated, so the problems of secondary pollution (including the radiation pollution of heavy metal) during application and the like are solved.

The invention discloses washing liquid used in the semiconductor industry to wash plasma etching residues. The washing liquid contains citric acid/citrate buffer solution, fluorides, macromoledular corrosion inhibitor, anti-freeze agent and solvent. The washing liquid can effectively wash the plasma etching residues during the process of manufacturing a semiconductor, have low etching velocity on nonmetals and metal substrates such as Si, SiO2, tetraethoxy silane silicon dioxides (PETEOS), low-medium materials, Ti, Al, Cu and so on, is safe and harmless to the environment and the human body, and has good application prospect in the microelectronic field such as washing of semiconductor wafers and so on.

The utility model relates to a rapid preparation method of SiO2 aerogel sphere, belonging to a field of inorganic metallic materials, in particular to a method of rapidly preparing SiO2 aerogel sphere. Water glass is used as raw material that performs ion exchange to obtain the silicic acid PH=2-3, after added with alkaline catalyst, the silicic acid is added into the hydrophobic oil, and then is mixed to cut into micro liquid drops that are spherically suspended in the oil under the action of surface tension, the silicic acid is mixed until aerogel sphere is generated, afterwards, the oil and the sphere perform solid-liquid separation, and then are cleaned with water to obtain aerogel sphere, the aerogel sphere is soaked by the ethanol and absolute alcohol in sequence to perform solvent exchange to obtain alcohol gel sphere, after dried, aerogel sphere with micrometer or millimeter grade particles can be otained. The invention has low cost, easy and controllable process, mass production, good product quality and wide application prospect in the heat isolation and catalysis fields.

The invention provides a process for extracting lithium from lithionite by fluorine chemistry, comprising the following steps: throwing raw materials of lithionite powder, an additive and sulfuric acid based on the weight ratio of 1: (0.1-2): (0.5-5) into a pre-reactor, and then stirring to react or simply stirring and then throwing the raw materials into the reactor to react, wherein, the additive is one or more of a fluorine-containing mineral substance, salt or acid; reaction conditions in the pre-reactor are as follows: preheating the raw materials at the temperature of 50-150 DEG C for 0.1-2 hours, and then transferring into the reactor to react at the temperature of 150-350 DEG C for 0.5-4 hours; immediately evacuating the gas generated during the reaction process; leaching the obtained reaction residue with water and then carrying out liquid-solid separation to obtain a sulfate liquor; and adjusting pH into 5.0-10.0 to eliminate ionic impurities such as aluminum, magnesium, calcium, ferrum and the like; and after the liquid-solid separation is carried out, concentrating the sulfate liquor, precipitating lithium ions and then filtering to obtain a crude lithium salt product or the corresponding refined lithium salt product as required. The process of the invention has the advantages of low reaction temperature, small production energy consumption and high lithium extraction efficiency; and various valuable components of the lithionite mineral substance can be comprehensively utilized during the production process of lithium salt.

The invention discloses a method for extracting and separating nickel and molybdenum from nickel-molybdenum-containing coal gangue. The method comprises the steps of: pulverizing raw ores and blending sodium carbonate to prepare pellets, and smelting the coal gangue at high temperature by using carbon contained in the coal gauge per se to extract nickel and obtaining ferro-nickel alloy and molten slag; lixiviating the ferro-nickel alloy with water to obtain molybdenum-containing lixivium; and carbonating the molybdenum-containing lixivium by using CO2-containing furnace gas generated in high-temperature smelting to precipitate sulfur and sodium hydroxide in sequence, and filtering to obtain the sulfur and the sodium hydroxide, wherein the sodium carbonate is recycled for the step of high-temperature smelting, and filtrate is further subjected to a molybdenum wet-process smelting process for molybdenum extraction. Compared with the traditional method, the method disclosed by the invention is an efficient, economic and harmless production method and has the advantages that a carbon reducing agent is unnecessary to add, the nickel and the molybdenum are effectively separated and have high purity and raw materials are utilized comprehensively and favorably.

The invention provides a method for modifying a carbon porous material, characterized in that by applying a high pressure pulse voltage on two opposite plate electrodes and inserting an electrolyte plate which has a high dielectric constant and a compact structure and has an area that is slightly larger than the size of the plate electrodes between the two opposite plate electrodes, a uniform discharge plasma reaction zone is formed between the plate electrodes; mixed gasses containing oxygen are uniformly mixed at normal temperatures and pressures, the mixed gasses are subject to ionization activation by the plasma reaction zone to generate a plurality of oxygen-containing plasma gasses, after gas distribution is carried out, the gasses vertically flow through a pre-cleaned carbon porous material in the thickness direction to react to obtain the activated carbon porous material. The method has the advantages of environmental protection, low cost, mild treatment conditions, easy control of function group quantity, and outstanding improvement of the activity of the electrode material, and the method can realize gradient treatment, can reduce the area resistance of the contacting surface of the porous material and the bipolar plate, so as to increase the battery efficiency. The method uses devices, thus the method is easy for industrialized operation.

The invention discloses a method for cultivating pleurotus eryngii uniformly rich in selenium with a mixed organic selenium source. The method is characterized in that the method comprises the steps of mixing selenium-rich cultivating material additive accounting for 1-10 percent of the total weight of dried cultivating material into the dried cultivating material, and cultivating pleurotus eryngii according to an ordinary cultivation method to obtain pleurotus eryngii uniformly rich in selenium; the selenium-rich cultivating material additive has a total selenium content of 5-50 mg/kg, and needs to be crushed first and then compressed to form particles of certain grain sizes, the grain sizes of the particles in the selenium-rich cultivating material additive are in the range of 0.005-5.0 mm with multi-grain-size regional distribution, the particles having a grain size of 1.0-5.0 mm account for about 10 weight percent of the total weight of the additive, while the particles having a grain size of 0.005-0.1 mm account for at least 40 weight percent of the total weight of the additive. The method has the advantages that the selenium utilization factor of the cultivating material in pleurotus eryngii is high, the selenium content in different batches of picked pleurotus eryngii is stable, therefore, the method is highly safe, convenient to operate, and easy to promote.

The present invention discloses a post-tensioning pre-stress duct grout material for a low temperature condition, and belongs to the technical field of building materials. The post-tensioning pre-stress duct grout material comprises a coagulation accelerating component, an anti-freezing component, a polycarboxylic acid water reducing agent, an expanding agent, an antifoaming agent, polyacrylamide, a plasticizer and a mineral admixture, wherein the anti-freezing component is a mixture obtained by compounding a nitrite and a sulfate according to a weight ratio of 0.5-2.0:0.5-1.0. The post-tensioning pre-stress duct grout material has characteristics of significant low-temperature resistance effect, controllable setting time, appropriate initial setting time, appropriate final setting time, high compressive strength, high bending strength, zero free bleeding rate, stable performance, and easy and convenient use, and can be widely used in highway bridge and culvert construction.

The invention, which belongs to the field of platinum group metal analysis and detection, discloses a method for accurately detecting contents of platinum, palladium and rhodium in a waste automobileexhaust catalyst. According to the invention, burdening, smelting trapping, ash blowing separation of metal bismuth and platinum, palladium and rhodium content detection are performed based on bismuthtest gold pyrometallurgy metal enrichment technological process and the process optimization is performed, so that problems of matrix interference and incapability of ash blowing in the traditional method are solved and a defect that platinum, palladium and rhodium in the waste automobile tail gas catalyst are difficult to effectively capture, separate and detect by adopting the existing method is overcome. Therefore, the recovery rate of platinum, palladium and rhodium is increased and the accurate detection of the contents of platinum, palladium and rhodium in the waste automobile tail gascatalyst is ensured.

The invention discloses a pressurized acid-leaching potassium extracting technology for potassium feldspar. Products such as potassium sulphate, aluminum hydroxide, quartz and gypsum are obtained from the raw materials such as potassium feldspar powder, fluorosilicic acid, sulfuric acid and cyclic dilute sulphuric acid. The pressurized acid-leaching potassium extracting technology disclosed by the invention is low in sulfuric acid consumption, high in percent conversion, low in reaction temperature, small in energy consumption in production, and low in potassium extraction cost; and various ingredients in potassium feldspar ore are comprehensively utilized.

The invention provides hydroxypropyl chitosan microspheres as well as a preparation method thereof and application thereof in reduction of dielectric loss of vegetable oil, belonging to the field of chitosan modification. The preparation method of the hydroxypropyl chitosan microspheres comprises the following steps: mixing chitosan, having viscosity of 0.25-0.65Pa.s with isopropanol and a first sodium hydroxide solution, adding tetramethyl ammonium hydroxide into the mixture, dropwise adding epoxypropane for carrying out a reaction, cooling and adjusting the pH value to 7, dispersing the product into acetone or water, stirring and carrying out suction filtration, washing with anhydrous ethanol, and carrying out vacuum drying to obtain hydroxypropyl chitosan; preparing the hydroxypropyl chitosan into a solution, spraying the solution onto sodium polyphosphate, carrying out ultrasonic treatment and crosslinking, then washing with water, filtering, adding the product into a sodium hydroxide solution and stirring, and adding glutaraldehyde for carrying out a reaction so as to obtain microspheres; washing the microspheres with water, then leaching the microspheres respectively with organic solvents with volume percentages of 21-29%, 41-49%, 61-69% and 85-89%, and carrying out freeze drying. The modified chitosan prepared by the method can reduce the dielectric loss of the vegetableoil.

The invention relates to waterborne weather-resisting anticorrosive coating and a preparation method thereof and relates to the field of waterborne anticorrosive coating. The coating is prepared by uniformly mixing and stirring a resin component and an isocyanato curing agent component, wherein the resin component contains fluorocarbon resin, and the ratio of the hydroxyl mol number of the fluorocarbon resin to the isocyanato mol number of the isocyanato curing agent component is 1 to (1.02 to 1.05); the resin component also contains graphene powder which accounts for 0.1 to 5.0 percent of thetotal weight of the coating; the coating can be used for effectively improving the water resistance, acid resistance, alkali resistance, temperature and heat resistance, salt mist resistance and weather resistance of a whole body, so that the safe, green, environment-friendly and pollution-free utilization requirements on the coating in the market can be effectively met.

The invention relates to marine antifouling paint, i.e., waterborne graphene paint and a preparation method thereof. The paint is prepared by evenly mixing a component A with a component B containinggraphene according to a mass percent of (1-2) to (2-4). The paint can effectively solve the problem that marine microorganisms adsorb on the surfaces of ships.

The invention discloses a concrete antifreezing agent. The concrete antifreezing agent comprises the following component in parts by weight: 35 to 45 parts of macrogol ester, 12 to 25 parts of nitrate, 5 to 6 parts of ethanediol perhydrol, 3 to 8 parts of N-sulfoacid, and 25 to 30 parts of para-melamine. The concrete antifreezing agent has the beneficial effects that 1, the concrete antifreezing agent is a composite product which can obviously improve the peaceability of concrete while improving the early strength, and the dosage is 2 to 5% of the total gum quantity; 2, chloride-free antifreezing admixture serving as the concrete antifreezing agent avoids corrosion of a reinforcing steel bar; 3, the novel antifreezing components adopted greatly decrease the alkali content and also avoid the alkali aggregate reaction in concrete, and the antifreezing agent does not settle and crystallize while being stored under a negative temperature; 4, novel components added do not contain ammonia component, so that no pollution and harm are brought to the environment; 5, the concrete doped with the concrete antifreezing agent is high in durability, i.e.,, the loss rate of the intensity of freezing and thawing at 100 times is less than 5%, and the shrinkage rate at 90 days is less than 120%.

A door frame cover board comprises a cover board body, a leather coat and edge sealing battens. The cover board body is provided with an L-shaped groove and two installation grooves for decorating plates. The leather coat includes a first coat and a second coat, the first coat is provided with a first edge and a third edge, the second coat is provided with a second edge and a fourth edge, the first edge and the third edge are fixed onto the L-shaped groove through the edge sealing battens and fastening nails, and the second edge and the fourth edge are fixed onto the two installation grooves for decorating plates through fastening nails. A door frame cover board processing method includes steps of 1, manufacturing the cover board body and the edge sealing battens and cutting the leather coat; 2, fixing the first coat and the second coat onto the L-shaped groove with the edge sealing battens and coating the cover board body respectively towards two lateral sides. The doorframe cover board is simple in structure and convenient in processing, needs no binding agent, causes no hidden trouble, indoor environment pollution, and accords with the consumption concept of pursuing environment-friendly products.

The invention provides a cleaning method of a graphite boat for manufacturing solar cells. The cleaning method of the graphite boat for manufacturing the solar cells comprises the steps that the graphite boat with impurities is put into a vacuum sintering furnace to be subjected to vacuum high-temperature sintering, the impurities attached to the graphite boat are changed into gas to be separatedfrom the graphite boat in the vacuum high-temperature sintering process, the gas converted from the impurities is pumped away by a vacuum pump and conveyed to a tail gas treatment system to be subjected to tail gas purifying treatment, and then the impurities such as foreign matter film on the surface of the graphite boat are burnt off. According to the cleaning method of the graphite boat for manufacturing the solar cells, the graphite boat can be cleaned up in a short time, no chemical agent such as HF acid is used in the whole process, no environmental pollution hidden danger exists, the environmental protection pressure for factories is reduced, no harm is generated to operating personnel, and the cleaning efficiency and the cleaning effect are improved; the graphite boat does not needto be disassembled, and damage to the graphite boat in the disassembling process is avoided; and in addition, few treatment link is needed, the cleaning time is short, and the production efficiency is higher.