30results about How to "Can be recycled" patented technology

The invention provides a compound method for restoring soil polluted by heavy metal. The compound method comprises the following steps that bracketplant is planted in the soil polluted by the heavy metal, and the bracketplant is overall removed after 85-95 days; a mixture of biological carbon base fertilizer and heavy metal activated bacterium liquid is applied into the soil; sugarcane is planted in the soil polluted by the heavy metal, the bracketplant is continuously planted next spring, the bracketplant is overall removed after 85-95 days and the sugarcane is overall removed in August or September; a mixture of the biological carbon base fertilizer and the heavy metal activated bacterium liquid is applied into the soil and mixed evenly, and seasoning is conducted for 75-80 days; and the steps from the first step to the fifth step are executed circularly and repeatedly until the content of the heavy metal in the soil is up to the safety standard. According to the compound method, the heavy metal absorption efficiency of plants is improved and the soil remediation effect is good; in addition, the compound method has the characteristics of being friendly to the environment, free of secondary pollution, high in practicability and the like.

The invention relates to an oil sludge carbon supported metal catalyst, and a preparation method and application thereof. The catalyst is prepared by taking oil sludge carbon as a carrier and CoFe2O4as an active component, wherein the supporting mass of the active component CoFe2O4 is 5-20%, and the specific surface area of the carrier is 100-120 m<2>/g. An oil sludge carbon based supported metalcatalyst CoFe2O4@OS is prepared by taking oil sludge carbon as a carrier and Co(NO3)2.6H2O and Fe(NO3)3.9H2O as precursors through an impregnation method, and the CoFe2O4@OS can be used as a heterogeneous catalyst to efficiently activate peroxymonosulfate (PMS) to generate free radicals to degrade pollutants in water. The carbon component in the catalyst is used as a carrier of metal oxides, so that catalytic sites are uniformly distributed, and catalytic activity and degradation efficiency of the system are improved. The oil sludge carbon based supported metal catalyst has the advantages ofhigh efficiency, convenience, wide pH application range, high stability, low catalyst preparation cost and the like, and has great potential in the aspect of pesticide wastewater treatment.

The invention discloses a method for carbonylation synthesis of diaryl ketones through iron catalysis and belongs to the technical field of catalytic synthesis. According to the method, in a solvent alcohol or alcohol aqueous solution, and in the action of alkali, acid and iodide, an iron catalyst is added for catalyzing a direct cross-coupling reaction of an aryl halogenated compound, an aryl boron compound and a carbonyl source including haloform or carbon tetrahalide to prepare a diaryl ketone compound. The method for preparing a diaryl ketone compound through a coupling reaction is safe in carbonyl source and easy to treat and is cheap; the catalyst is available in sources and low in toxicity and is cheap; the reaction is free of ligand and good in activity; the reaction condition is mild and the selectivity is high; the substrates are available in sources and are stable; the functional groups of the substrates are good in compatibility and the substrates are wide in application range; and the reaction medium is green and can be reused. In an optimized reaction condition, the separation yield of a target product can reach 94%.

The invention relates to rare earth-containing foundry molding sand, which is prepared from the following raw materials by weight: 15-20 parts of coal gangue, 3-4 parts of vitrified micro-bead, 2-2.5 parts of calcium stearate, 220-240 parts of clay, 2-3 parts of calcium ricinate, 4-6 parts of dioctyl sebacate, 6-9 parts of diopside, 6-9 parts of limestone, 3-4 parts of rare earth, a proper amount of water, and 20-30 parts of an auxiliary agent. According to the rare earth-containing foundry molding sand of the present invention, the rare earth is used, such that the surface abrasion resistance of the cast can be increased; the molding sand has characteristics of particle shape, good gas permeability, good fluidity, good dispersion and recycling; the auxiliary agent of the present invention adopts alumina and other high temperature resistance materials, such that the auxiliary agent can not melt during casting, the adhesion of the clay particles can be prevented, and the recycling is easily performed; the clay is wrapped on the surface, and the binding force with the clay particles is strong, such that the molding sand plasticity is increased; the fluidity of the auxiliary agent is good; and the molding sand has characteristics of high strength, good cast surface quality and high production efficiency.

The invention relates to a preparation method of a catalyst for ultraviolet catalytic wet-type oxidation. The catalyst is a LaCoO3 perovskite catalyst formed by adopting La(NO3)3 and Co(NO3)2 as precursors and adopting citric acid as a complexing agent in a high-temperature calcining way by virtue of a sol-gel method. The catalyst can be sufficiently synergistic with the ultraviolet, under an acidic condition, the hydrogen peroxide is used as an oxidant to efficiently catalyze the oxidation of coal chemical waste water membrane concentrated solution at relatively low temperature and pressure,and the catalyst is controllable in structure, good in heat stability, recyclable, and high in environmental and economical benefits.

The invention discloses a process for purifying Cu<2+> impurity in zinc electrolytic solution with SO2 in flue gas and simultaneously producing cuprous oxide as a byproduct. The invention is characterized in that the process comprises adding zinc oxide into zinc leaching solution containing Cu<2+> to adjust the pH to 5-6; allowing flue gas containing SO2 and the zinc leaching solution containing Cu<2+> to react in a desulphurizing tower to get precipitants including SO4<2-> and Cu2O; stopping the reaction when the pH of the mixed reaction solution is assayed to be 2.5-3.5; after heating and heat preserving, filtering the mixed solution after reaction to obtain cupric-removed purified liquid and cuprous oxide filter cakes. The invention overcomes the shortcoming of low cost of the prior method for processing Cu<2+> contained in the zinc electrolytic solution and provides a new process which treats the waste with another waste, and can save energy and simultaneously produce cuprous oxide.

The invention relates to a high temperature resistant molding sand, which is prepared from the following raw materials by weight part: 10-20 of loess, 20-30 of steel slag, 3-4 of beta-semi-hydrated gypsum, 5-6 of methyl sodium silicate, 1-2 of tea saponin, 4-7 of CaO, 5-8 of MnO, 5-8 of furnace black, 5-8 of titanium dioxide, 3-5 of polyethylene oxide, 200-220 of clay, a proper amount water, and 20-30 of an assistant. By using clay, the molding sand provided by the invention has appropriate particle size, good air permeability, good fluidity and good dispersion, also the casting surface is smooth, and the molding sand can be recycled. By using steel slag, the high temperature resistance of clay particles is increased, the molding sand is difficult to cake, and resources are saved. By using methyl sodium silicate, furnace black and polyethylene oxide, the molding sand not only has good caking property, but also has good fluidity and good high temperature collapsibility.

The invention discloses a transition metal modified montmorillonite phosphorus removing adsorbent prepared based on a cross precipitation method. The transition metal modified montmorillonite phosphorus removing adsorbent prepared based on the cross precipitation method is prepared by the following steps of cleaning montmorillonite with acetone, ethanol, tap water and deionized water to obtain a substance A, and modifying the substance A with a mixed liquid prepared from ammonium paratungstate, lanthanum nitrate, lithium niobate, cerous nitrate, sodium aluminate, aluminum nitrate, ammonium molybdate and ferric nitrate to prepare a substance J; and modifying the substance J with a mixed liquid prepared from aluminum nitrate, ferric nitrate, lanthanum nitrate and cerous nitrate to obtain a substance, i.e. the transition metal modified montmorillonite phosphorus removing adsorbent prepared based on the cross precipitation method. The transition metal modified montmorillonite phosphorus removing adsorbent prepared based on the cross precipitation method has the beneficial benefits that the transition metal modified montmorillonite phosphorus removing adsorbent prepared based on the cross precipitation method has the characteristics of high adsorption efficiency to phosphorus, rapidness in speed, large adsorption capacity, capability of regeneration and reuse and the like.

The invention relates to high gas-permeability mold core molding sand, which is prepared from the following raw materials by weight: 5-8 parts of silicon carbide fibers, 8-10 parts of potassium feldspar, 2-3 parts of carboxymethyl cellulose, 1-2 parts of polyethylene ethyl acetate, 3-4 parts of manganese oxide, 4-5 parts of a polyamide-imide resin, 200-220 parts of clay, 2-3 parts of sodium fluorosilicate, 1-2 parts of sodium disilicate, 10-15 parts of phosphorite powder, a proper amount of water, and 20-30 parts of an auxiliary agent. According to the high gas-permeability mold core molding sand of the present invention, the molding sand is granular and has characteristics of excellent gas permeability, excellent fluidity, excellent dispersion, low moisture absorption, good collapsibility, easy removing, and recycling; the auxiliary agent of the present invention adopts alumina and other high temperature resistance materials, such that the auxiliary agent can not melt during casting, the adhesion of the clay particles can be prevented, and the recycling is easily performed; the clay is wrapped on the surface, and the binding force with the clay particles is strong, such that the molding sand plasticity is increased; the fluidity of the auxiliary agent is good; the carbon fibers are adopted so as to increase the strength and the heat resistance of the molding sand; and the high gas-permeability mold core molding sand of the present invention is suitable for mold core production.

The invention discloses a gas-liquid distribution system for absorbing flue gas based on a cavitation machine coupling aid. The gas-liquid distribution system comprises a multi-pollutant flue gas source, an absorption tower, a gas-liquid distributor, a U-shaped drying pipe, a flue gas analyzer, a particle collector, a cavitation machine and an absorption liquid collector; the lower part of the absorption tower is connected with the multi-pollutant flue gas source through a rotor flow meter, and the upper part of the absorption tower is provided with the gas-liquid distributor; the multi-pollutant flue gas source is also connected with the flue gas analyzer and the particle collector in sequence; the upper end of the absorption tower is sequentially connected with the U-shaped drying pipe,the flue gas analyzer and the particle collector; the gas-liquid distributor is connected with the lower part of the absorption tower through a water pump; the gas-liquid distributor is also connectedwith a cavitation machine; the cavitation machine is positioned on one side of the absorption tower; the absorption liquid collector is connected with the bottom of the lower end of the absorption tower. The invention also provides an absorption process of the system. The aid is high in utilization rate; various pollutants are removed, the pollutant removal rate is high, and the treated gas amount is large; the energy consumption is relatively low; the method is simple in process, simple in device and easy to operate.

The invention provides a method for restoring heavy metal contaminated soil through combination of biological activated carbon and plants. The method includes the steps that cotton is planted in the heavy metal contaminated soil and after the cotton is picked, the cotton is completely removed; biological activated carbon base fertilizer is applied to the heavy metal contaminated soil where the cotton is planted and the base fertilizer is evenly mixed with the soil and aged; willows are planted after cotton biological activated carbon aging is finished, the willows are completely removed after 10 months to 12 months; the biological activated carbon base fertilizer is applied in the heavy metal contaminated soil where the willows are planted again, and the base fertilizer is evenly mixed with the soil and aged; after willow biological activated carbon aging is finished, cotton is continuously planted, and cotton plants are completely removed after the cotton is picked; the steps mentioned above are cyclically repeated till the content of heavy metal in the soil reaches the safety standard. By the adoption of the method, the soil treatment effect is good, the environment can be beautified when the heavy metal contaminated soil is treated, and practicality is high.

The invention relates to a movable wheeled pallet turnover box. The box is provided with a tray, and the bottom of the tray is provided with a plurality of piers; a telescopic steel member is connected with the outer sides of the piers of one end of the tray, and the telescopic steel member is connected with a mobile damping wheel; the outer sides of the piers at the other end of the tray are connected with the mobile damping wheel or connected with the mobile damping wheel through the telescopic steel member. The box solves the problems of high difficulty, high risk, high cost, low efficiency, easy damage and the like of front end logistics machinery handling and tail end logistics manual handling and the problem that the secondary packaging in the traditional logistics process cannot berecycled.

Disclosed is a kitchen oil-storage plastic bottle capable of effectively recovering dripping cooking oil, which relates to the field of machinery, and specifically belongs to a bottle for holding oil. When existing oil bottle does not reclaim and pour oil, the function of leaking a small amount of oil. The purpose of the present invention is to provide a kitchen oil storage plastic bottle that can effectively recover dripping cooking oil. In order to achieve the above purpose, the present invention includes a cylindrical body, a cover, and an oil outlet. The surrounding and slightly inwardly inclined secondary oil collection container, the secondary oil collection container is concave near the oil outlet, and on the wall of the oil outlet pipe at the lowest point of the concave part, there is also a residual oil recovery Small hole. The invention has the advantage of recovering residual oil.