50results about How to "Serious pollution" patented technology

The invention belongs to the field of complicated copper-lead-zinc sulphide ore beneficiation separation and provides a copper-lead separation flotation inhibitor and applications thereof. The copper-lead separation flotation inhibitor is formed by mixing polymeric ferric sulfate solution with a mass concentration of 5.0%-6.0% and glycerin solution with a mass concentration of 0.8%-1.2%, wherein the mass ratio of the polymeric ferric sulfate solution to the glycerin solution is 1:1-4. Addition of the inhibitor in copper-lead separation operation can remarkably improve copper and lead concentrate qualities, evidently lower mutual containing of copper and lead, and improve flotation recovery rate of copper and lead minerals. The copper-lead separation flotation inhibitor and the applications thereof have the advantages that the copper-lead separation flotation inhibitor is environment-friendly, efficient in sorting, low in reagent cost, easy to operate and the like and applicable to the complicated copper-lead-zinc sulphide ore beneficiation separation.

The invention relates to a process for treating and comprehensively utilizing a vanadium-titanium magnetite. The process is characterized by comprising the following steps: (1) treating a raw vanadium-titanium magnetite by crushing, tailings discarding, fine grinding, low-intensity magnetic separating, high-intensity magnetic separating, and separating by a shaking table, so as to obtain a titanium concentrate and a high-vanadium-ferrum concentrate; (2) adding an adhesive to the high-vanadium-ferrum concentrate; uniformly mixing and pelletizing; drying; uniformly mixing with pulverized coal or coke powder; distributing; performing controlled reduction that V is not reduced through a coal based shaft furnace so as to obtain sponge iron, wherein the amount of used reducing agents such as the pulverized coal is 30 to 70% of the weight of high-vanadium-ferrum concentrate powder, and the reduction is performed for 10 to 18 hours at the temperature of 850 to 1060 DEG C; (3) heating the obtained sponge iron for 0.5 to 1.0 hour at the temperature less than 1050 DEG C through an intermediate frequency/ main frequency furnace under a weak reduction atmosphere; then heating until the temperature is more than 1500 DEG C; performing melt separation to enable vanadium to enter slag, thus obtaining high-grade vanadium slag and high-purity molten iron. With the adoption of the process, a plurality of valuable elements in the vanadium-titanium magnetite can be effectively separated and utilized with high additional value.

The invention belongs to the technical field of medicines, and relates to a method for extracting astaxanthin from haematococcus pluvialis. The method comprises the steps of culturing a seed stock solution in a glass apparatus with a drainage system, and carrying out later amplification culture of the haematococcus pluvialis and accumulation culture of the astaxanthin after 10-15 d; centrifuging a culture in an exponential growth period of seed culture; and inoculating cell clusters in a BBM basal medium to obtain a primary culture. The later accumulation culture of the astaxanthin is amplification culture by using a breathable plastic bag type simple device provided by the invention. In the accumulation stage, a stress culturing method is adopted to obtain a lab-scale test haematococcus pluvialis culture; and haematococcus pluvialis powder is obtained by spray drying. According to a preparation technology that extracts astaxanthin from the haematococcus pluvialis by adopting an ultrasonic cell disruption assisted mixed solvent extraction method, the haematococcus pluvialis powder is added in an organic solvent to carry out ultrasonic cell disruption, and then the astaxanthin is obtained by the steps of reflux extraction in a water bath, suction filtration, filtrate merging and concentration. Compared with a conventional direct extraction method, the method provided by the invention saves extraction time, and increases astaxanthin yield.

The invention relates to a remaining heat pressure self-decompression treatment method of solid thermal steel slag, which is characterized by comprising the following steps: 1) loading slag: the solid thermal steel slag is loaded in an self-decompression tank; 2) spraying water and elevating pressure: the spraying water and cooling are carried out on the slag so as to generate steams with pressure; 3) constant pressure self-decompression: self-decompression is carried out on the slag in the self-decompression tank at a constant steam pressure kept; 4) cooling: water is sprayed so as to continuously cool the steel slag; and 5) completing self-decompression: a release valve is opened to give out steam so as to finish self-decompression. The treatment method has the advantages of good product quality, high efficiency, saving lands, reducing pollution and reducing investment.

The invention discloses a preparation method of a nanocellulose film precipitated by applying a water solution. The preparation method comprises the following steps: dissolving cellulose with concentration of 10-40g/L into a mixed solution of sodium hydroxide, urea and water at minus 15-minus 8 DEG C; after heating the cellulose solution to the room temperature, dropwise adding water to the cellulose solution to precipitate cellulose to obtain nanocellulose colloid dispersion liquid; filter-pressing the nanocellulose colloid dispersion liquid to obtain the nanocellulose film, wherein the mixed solution contains 5-10% of sodium hydroxide, 10-15% of urea and the balance of water by mass percent, and the volume ratio of water to the cellulose solution is (1-3):1. The method overcomes the defects of difficulty in acid waste liquor recovery, high preparation cost, high preparation energy consumption, heavy environmental pollution and the like in the existing preparation method of nanocellulose and the film thereof, and has the advantages of simplicity and high efficiency in operation, solvent reusability, environment friendliness and low energy consumption.

The invention relates to a mobile airport ground static inversion power source system mainly applied to the field of civil aviation aircrafts and used for supplying power for aircrafts landing on ground in specific working conditions. The system includes a large power rectifier, a power lithium battery power storage system and a large power inverter. The system also includes a start power system,an operation interface and a high voltage output cable. In a charging mode, after three-phase AC is connected to the rectifier, a main control system sends commands to a battery management system through CAN communication so as to close a high voltage relay of the power lithium battery power storage system. The main control system starts a charging module for charging after detecting high voltagesignals. A discharge mode includes three-phase AC on-load, power lithium battery power storage system DC on-load and AC/DC on-load. The invention can solve a problem of power supply for remote boarding gates of aircrafts and is low in noise, small in fossil fuel consumption, free of pollution and discharge and low in economic cost.

The invention relates to a purification method of river wastewater comprehensive treatment, relates to the field of ecological restoration treatment, and aims to solve the problem of solving river wastewater purification and establishment of self purification restoration ability. The high performance coagulating sedimentation pretreatment technology and strengthened coupling membrane bioreactor technology are used for river wastewater comprehensive treatment, river wastewater with poor water quality and serious suspended solids pollution can be pretreated by the high performance coagulating sedimentation technology, the effluent is clear and transparent, the effect is quick, by use of the strengthened coupling membrane bioreactor technology, the river wastewater treatment effect is good, operation is stable, occupation of land is small, cost is low, operation cost is low, layout is flexible, and the method helps to establish and improve the river ecological restoration capacity.

The sloping-type double-strip diamond saw machine is aslope arranged on a column by a large frame with enough intensity. Two pairs of light flywheels with the diameter of 1600mm-1610mm are arranged on the large frame, and two driving flywheels are connected together at the lower end of the large frame and rotate under the driving of the driving motor. Two driven flywheels at the upper end of the large frame are respectively and correspondingly arranged on the slideways with different tensioners. The thickness of boards is made by anti-slip circles with different thickness. Two welding edge of the diamond knife head is strip steel in form of wave with the width of 200mm and the thickness of 1.4mm, the strip steel is welted into a circle and arranged on the two flywheels. The knife head is welted on the wave-shaped chimb by laser. When the host machine rotates, the knife head and the saw blades do high-speed rotation movement from top to down in the eight roller-type controllers. The cooling water pipe is located at the two sides of the top end of the saw blade and sprinkles water over the incision line of the saw blade. Under the driving of the frequency conversion motor, the flat vehicle filled with crude materials facilitates the crude materials to pass through the edge of the crude materials at different speeds and the demanded thickness under the control of the numerical control stowing tool. The working form that the saw blade B is at the front and the saw blade C is at the rear is formed gradually, and the two boards after being cut fall on the transportation bracket wheel which is horizontal to the bottom of the crude materials. When the flat vehicle returns to the stop point, the two boards on the bracket wheel are rotated by a plurality of bracket wheels simultaneously in the guard to the storage point, and the numerical control stowing tool carries out a second circulation to the thickness designed by pulsion of the crude materials.

The invention discloses a preparing method of rapid soluble typed dicyandiamide, which comprises the following steps: adding 23.16-25.85% formaldehyde, 39.30-43.38% water, 22.57-25.62% dicyandiamide and 2.59-3.73% amchlor into reacting stove sequently; heating to 70-85 Deg C; adjusting pH value at 7.5-9.5; reacting 1.5-5.5h thermostatically; moving the material into polymeric autoclave; supplementing 6.22-7.44% amchlor; controlling the temperature at 75-95Deg C with pH value at 4.0-6.8 for 1.5-5.0h; moving to opsonizing stove; controlling the temperature at 55-70 Deg C; adding 0.17-0.20% primary alcohol for 0.3-1.0h; obtaining liquid dicyandiamide formaldehyde resin; drying directly; obtaining the product.

A technology for enzymatic efficient deacetylation and chitin degradation by using Thermophilic Bacillus belongs to the fields of the food processing technology, the bio-pharmaceuticals and the chemical engineering technology. The above strain has the biological characteristic of generation of highly active extracellular chitin deacetylase and chitin degrading enzyme, and can efficiently degrade chitin. The technology mainly comprises the following steps: inoculating preserved slant strain into a double layer plate with chitin as a sole carbon source, culturing at 46DEG C for 24h, inoculating a certain amount of the above obtained substance into a liquid medium with chitin as the sole carbon source, carrying out liquid seed culturing at 46DEG C for 72h, and inoculating the obtained production strain into a fermentation medium with chitin as the sole carbon source according to a certain ratio. The technology can degrade chitin to produce chitosan, chitosan oligosaccharide with different molecular weights, glucosamine (aminoglucose), acetylglucosamine and other relevant products, and also can produce chitin deacetylase and the chitin degrading enzyme.

The invention discloses a preparation method of a baloxavir key intermediate and the intermediate thereof. The method includes subjecting 3,4-difluoro-2-methyl benzaldehyde shown as a formula (I) as araw material to a bromination reaction to obtain 3,4-difluoro-2-bromomethyl benzaldehyde shown in a formula (II), carrying out a substitution reaction to obtain 3,4-difluoro-2-(((2-bromophenyl) thio)methyl)-benzaldehyde shown in a formula (III), and finally, carrying out a nucleophilic addition reaction to synthesize a target product, namely 7,8-difluorodibenzo[b, e]thiepin-11(6H)-ol shown in aformula (IV). The specific reaction process is shown in the specification. According to the method, 2-bromothiophenol is used for replacing foul and virulent thiophenol, the reaction steps are reducedto three steps, and the preparation method is high in yield, low in cost, environmentally friendly and easy to operate.

The invention discloses an application of eutrophic water to resistance regulation of lawn plants, wherein the eutrophic water is the eutrophic water with 25 percent-75 percent of the original concentration; the eutrophic water has TN of 9.7mg/L-13.1mg/L, TP of 0.6mg/L-0.9mg/L and pH value of 8.12-8.99; and the evaluation indicator of the resistance refers to the change in contents of proline, soluble sugar and malonaldehyde. Results show that the diluted eutrophic water is applied to irrigation to improve the resistance of the lawn plants to adverse growing environment and achieve the purpose of resource conservation and environmental protection.

The invention discloses an efficient flotation collecting agent for zinc sulfide and application of the efficient flotation collecting agent, and the efficient flotation collecting agent is composed of the following components in percentage by mass: 92%-98% of 2-hydroxyethyl dibutylcarbamodithioate, 1.5%-5% of 2-hydroxy-1-mercaptomercaptan and 0.5%-3% of octanol. According to the synergistic effect of the medicament, the 2-hydroxyethyl dibutylcarbamodithioate, the 2-hydroxy-1-mercaptomercaptan and a non-ionic collecting agent octanol are used as the zinc combined collecting agent. The combinedcollecting agent has good collecting performance on zinc sulfide minerals, the collecting performance on pyrite is weak, and the purpose of efficiently recycling zinc can be achieved. According to the zinc combined collecting agent HQ-Zn, when a higher zinc recovery rate is obtained, the dosage of copper sulfate is 1/5-1/2 of that of copper sulfate in a sodium butyl xanthate system, and the dosage of HQ-Zn is 1/4-3/5 of that of sodium butyl xanthate. After the agent and the method are adopted, raw ore containing 0.3%-5% of lead, 0.3%-7% of zinc and 1%-25% of sulfur is treated, the zinc gradein the zinc concentrate can be larger than 50%, and the zinc operation recovery rate is larger than 88%.

The invention discloses a method for synthesizing nano hydrated crystalline sodium silicon titanate by utilizing an inorganic raw material. According to the method, Na2Si2O3.9H2O and NaOH are used as silicon sources and an ethanol solution of TiCl4 is used as a titanium source; a nano CST (Crystalline Silicotitanate) crystal without an impure phase is successfully prepared by adopting a sol gel-hydrothermal synthesis method; the difficulty that the prepared CST contains the impure phase is solved; the method is low in operation cost and simple in preparation process.

The invention provides a preparation method of a gasification slag magnesium-nickel alloy hydrogen storage composite material. The method is characterized in that after magnesium powder, nickel powderand gasification slag are mixed, by means of a porous structure of the gasification slag, pore channels of the gasification slag are filled with the magnesium powder and the nickel powder through ball milling, ultrasonic vibration and other modes, and a mixture is uniformly mixed; and then through pressing, sintering and cooling, the gasification slag magnesium-nickel alloy hydrogen storage composite material is prepared. When the composite material is used for hydrogen storage, the porous gasification slag serving as a catalyst is distributed in a magnesium-nickel alloy matrix, so that alloyhydrogenation and hydride dehydrogenation can be promoted, alloy hydrogen collection and hydrogen desorption speed can be increased, and the activation energy of a hydrogen storage system can be reduced; and fine magnesium-nickel alloy particles are distributed in the gasification slag pore channels, so that the growth, caused by heating in a hydrogen desorption process, of the magnesium-nickel alloy particles can be effectively inhibited, and then the hydrogen storage cycle stability of the composite material is maintained. The preparation method is low in cost and wide in raw material source, has the effects of solid waste gasification slag treatment, and reclamation and higher value application of the gasification slag at the same time, and is remarkable in advantage and suitable for popularization.

The disclosure discloses a method for recycling lead paste in a spent lead-acid battery, comprising: (1) pretreating lead paste in a spent lead-acid battery as a raw material under vacuum; mixing the pretreated lead paste with a chlorination reagent to obtain reactants; and heating the reactants under vacuum to carry out a chlorination volatilization reaction, so that lead element in the pretreated lead paste is combined with chlorine element in the chlorination reagent to form lead chloride, which is then volatilized, and after the reaction is completed, chlorination residue and a crude lead chloride product are obtained by condensation and crystallization after volatilization; (2) purifying the crude lead chloride product obtained in the step (1) under vacuum to obtain a refined lead chloride product. The disclosure improves the overall process flow of the recycling method as well as parameter conditions of the respective steps thereof, and can effectively solve the problem of serious pollution in lead paste recycling in the prior art.

The invention relates to a preparation method of shark chondroitin sulfate chelated zinc salt. The method comprises the following steps: pretreating shark cartilage to obtain shark cartilage powder, and preparing shark chondroitin sulfate by utilizing an enzyme extraction and centrifugal machine separating synergistic nanofiltrating membrane purification linkage technology. The shark chondroitin sulfate zinc salt crude product is prepared by taking the shark chondroitin sulfate as a raw material and utilizing an ultrasonic cavitation and shark chondroitin sulfate zinc chelation technology. And a shark chondroitin sulfate zinc salt powder finished product is prepared by utilizing a centrifugal separating electrodialysis purification and spray drying integrated technology. The method is mild in reaction condition, controllable in quality and suitable for large-scale production. The shark chondroitin sulfate zinc salt prepared by the preparation method disclosed by the invention is concentrated in average relative molecular mass, good in solubility, high in bioavailability, high in safety and free from toxic and side effects, and can be applied to the fields of antiinflammatory health foods and medicines.

The present disclosure discloses a one-component type multi-functional fracturing fluid additive and a process for preparing the same. The process the following steps: mixing ethylene glycol, isopropanol, 1-butanol, 1-hexanol and 1-octanol, and heating to uniformly disperse the mixture to obtain an aqueous dispersant; adding a high molecular polymer thickener and an auxiliary agent to the aqueous dispersant, and stirring the mixture at a high speed to obtain a suspension, wherein the auxiliary agent is one or more selected from clay stabilizers, drainage aids, drag reducers, emulsion inhibitors, filtrate reducers, corrosion inhibitors and fungicides; and slowly stirring the suspension at a low speed, and cooling the suspension to room temperature to collect a sample of suspension. This auxiliary agent has good characteristics such as temperature resistance, shear resistance, salt resistance, and sand suspension.

A selective biocatalytic hydrogenation composition comprises glucose dehydrogenase, ketoreductase and coenzyme. The present invention also provides a preparation method of tert-butyl (3R, 5S) 3,5,6-trihydroxy hexanoate, and the tert-butyl (3R, 5S) 3,5,6-trihydroxy hexanoate is prepared by mixing tert-butyl (S)-5,6-dihydroxy-3-oxo-hexanoate with the glucose dehydrogenase, the ketoreductase and the coenzyme for reaction. The present invention also provides a method for synthesis of a Rosuvastatin intermediate, and the Rosuvastatin intermediate is mainly prepared from the selective biocatalytic hydrogenation composition. Compared with the prior art, the method has the advantages of being mild in reaction conditions, safe, environmentally-friendly, low in cost, high in product stereoselectivity, and the like.