48results about How to "The method is safe and environmentally friendly" patented technology

The embodiment of the invention discloses a silicon-based cathode composite material and a preparation method thereof, and belongs to the field of lithium battery cathode materials. An embodiment of the invention is as below: coating nickel hydroxide on the surface of a carbon-nano silicon composite material with a first carbon layer, calcining to remove the first carbon layer, so as to obtain nickel oxide-nano silicon composite material with gaps; then coating a second carbon layer on the surface of the nickel oxide-nano silicon composite material to obtain the silicon-based cathode composite material. The composite material comprises nano silicon particles, a nickel oxide layer arranged outside the nano silicon particles and carbon coating on the nickel oxide; gaps between nickel oxide and nano silicon particles are for containing embedded lithium ions, so as to keep stable structure of the cathode material during lithium deintercalation; and the method reduces the volume effect of the Si-based material and improves specific capacity and cycle performance of the cathode material. The method provided by the embodiment of the invention is safe and environment-friendly, and does not cause environment pollution.

The invention discloses a polyurea floor coating and preparation and application methods thereof as well as carbamide resin. The carbamide resin is polyaspartic acid ester carbamide resin; the polyaspartic acid ester carbamide resin is prepared by reacting diethyl maleate and 3,3-dimethyl-4,4-methylenebis(cyclohexylamine) as raw materials at 60-80 DEG C for 70-74 DEG C, with the weight ratio of the diethyl maleate to the 3,3-dimethyl-4,4-methylenebis(cyclohexylamine) is 1.0 to (1.55-1.60). The polyaspartic acid ester carbamide resin can stably exist at a room temperature; the polyaspartic acid ester carbamide resin is taken as a base component; and packing, an assistant and the like are added, so as to prepare the polyurea floor coating disclosed by the invention. The polyurea floor coating and an HDI curing agent are mixed to use at a certain ratio, so that the polyurea floor coating has the advantages of good abrasive resistance, ageing resistance, waterproofness, controllable elasticity and high-strength shock resistance.

The invention belongs to the field of environmental protection; and aiming at problems of high quantity, complex components and no proper process treatment of mercury-contained tailings generated by nonferrous metal mines and nonferrous smelting enterprises in a production process, the invention discloses a method for recovering mercury from the mercury-contained tailings through complexing extraction and consolidating decomposition. The method comprises the following steps: the complexing extraction is performed for the mercury-contained tailings by adopting mixed solution of thiosulfate and selenium generation of sulfate, so that transfer-state mercury in the mercury-contained tailings is transferred into leaching agent; and the consolidating decomposition is performed for the mercury in the leaching agent and a complex, formed by a thiosulfuric acid radical and a selenium generation of sulfuric acid radical, through a method of heating and feeding carbon dioxide gas, so that the mercury is finally converted to stable mercury sulfide / mercury selenide to form precipitates. The method is simple in operation; and the transfer-state mercury in the mercury-contained tailings is converted to a form of mercury sulfide and / or mercury selenide precipitates with low solubility, high stability and low toxicity, so that the pollution harm of the mercury in the mercury-contained tailings to environment is effectively reduced.

The invention discloses a rapid heat dissipation coating and a preparation method thereof. The rapid heat dissipation coating comprises the following components in parts by weight: 15.0-40 parts of water, 15.0-20.0 parts of a compound material, 20.0-40.0 parts of fillings, 12-35 parts of an emulsion, 1.0-5.0 parts of a film-forming auxiliary, 1.0-3.0 parts of an anti-freeze agent, 0.2-0.5 parts of a thickening agent, 0.1-1.0 part of a dispersing agent, 0.1-0.5 part of a wetting agent, 0.1-0.5 part of bactericide, 0.1-0.5 part of a mildewproof agent, 0.1-0.5 part of an antifoaming agent, 0.1-0.5 part of cellulose and 0.1-0.3 part of a pH adjusting agent. The rapid heat dissipation coating disclosed by the invention has excellent heat dispersion performance, and favorable water resistance and alkali resistance, can enable the difference between the indoor temperature and the outdoor temperature to be decreased, and reduces heat conduction, so that the absorbed indoor heat is reduced, and the effects of insulation and energy conservation are achieved.

The invention discloses a method for evaluating the influence of a whole vehicle feedback overcharge behavior on the service life of a battery, and the method comprises the steps: carrying out the pulse charging cycle test experiment of different overcharge working conditions on a plurality of experiment groups, and carrying out the cycle test of each overcharge working condition until a battery cell reaches an EOL state, wherein the target pulse voltages under different overcharge working conditions are sequentially set to be different voltage gears, and the capacity and power of the battery cell sample are regularly measured during the experiment period; dividing the plurality of voltage partitions according to voltage gears, counting overcharge information of different voltage partitions in each overcharge working condition and cell life attenuation in each overcharge working condition in a segmented manner, and acquiring cell acceleration factors associated with different overcharge degrees; counting historical overcharge information of different voltage partitions of the power battery; and quantitatively analyzing the influence of the whole vehicle feedback overcharge behavior on the battery cell life of the power battery according to the battery cell acceleration factor and the historical overcharge information. The quantitative analysis of the overcharge behavior of the power battery is realized, and the evaluation precision of the quality guarantee life is improved.

The invention relates to the technical field of graphene preparation, and particularly discloses a preparation method of high-quality graphene. The preparation method of the high-quality graphene comprises the following steps: mixing graphite powder with a stripping agent, an auxiliary stripping agent and an intercalation agent, then carrying out a reaction for 1-12 h, then carrying out a quenching reaction with water, and then washing and drying a reaction product to obtain the high-quality graphene. The method disclosed by the invention is safe and environment-friendly, simple and convenient to operate and low in production cost, and can be used for efficiently preparing high-quality graphene with few layers and few defects.

The invention discloses a powder catalyst which can catalyze a reaction of organic pollutants including p-chloroaniline, methyl orange and benzotriazole in photo-degradation water, and meanwhile discloses preparation methods of the powder catalyst. The preparation methods include a solid-phase sintering method, a self-propagating combustion method and a high-temperature thermal decomposition method, and further comprise a method combining an electrostatic spinning method and a precipitation method. The invention further discloses a preparation method of a modified fly ash floating bead composite porous catalytic material. The prepared YbInTiCrO8-modified fly ash floating bead composite porous catalytic material can be used for removing the organic pollutants including p-chloroaniline, methyl orange and benzotriazole in a water body through photocatalysis.

The invention discloses a method for preventing and controlling wind-eroded desertified soil. The method for preventing and controlling wind-eroded desertified soil comprises the following steps: pretreatment of desertified soil, preparation and use of a soil curing agent and vegetation recovery. By the method, while it effectively ensures that land is not desertified by a green way, the physicochemical property of soil can be improved, soil is improved, and the structure and environment of the soil are improved. The soil curing agent is mixed with organic matters such as horseradish tree leaves, in combination with a biological crosslinking agent, the method has functions of improving fertility, retaining water, improving inorganic salt tolerance and increasing the yield of land vegetation, humic acid in the implemented organic fertilizer provides nutrients for the biological crosslinking agent in the treated soil, and the water-retaining property of aggregates is further improved.