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 process for moderate-temperature self-assembly preparation of nano starch from enzymolysis short amylose. The process particularly comprises the following steps: (1) preparing a buffer solution; (2) preparing a starch water solution; (3) past-forming; (4) enzymolyzing, and then using anhydrous ethanol to precipitate the degreased starch solution; (5) preparing short amylose; (6) preparing nano starch. According to the process, enzyme hydrolysis starch is adopted to prepare nano starch at 30-70 DEG C in an anabiosis manner, the nano starch prepared by the method is high in productivity, low in cost, safer and more environment-friendly, and can serve as embedding materials of medicines, active ingredients and the like, and the application field of the process in the food industry is widened.

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 preparation method of a graphene-rubber composite. The method comprises the following steps: dispersing graphene in a dispersing agent to prepare a dispersion solution; adding latex into the dispersion solution to obtain a mixture; and drying the mixture. Mechanical mixing and ultrasonic agitation are utilized to prepare the graphene-latex mixture. The prepared high-adsorptivity graphene-rubber composite has communicating three-dimensional channels inside, thereby reducing the graphene interlaminar interaction force, and reducing the phenomenon of interlaminar superposition; and thus, the graphene is uniformly dispersed in the rubber without easily aggregating, and the graphene structure can not be destroyed, thereby maintaining the properties of the graphene material. The graphene-rubber composite has very high oil absorption number, and has the property of adsorbing heavy metal ions and organic pollutants in a water phase.

The invention discloses a preparation method of waxy corn starch nano particle-insulin sustained-release capsules. Debranched starch nano particles are prepared by adopting a biological enzyme method; an insulin solution is embedded into an amylase double helix cavity, and thus the waxy corn starch nano particle-insulin sustained-release capsules are prepared. The nano starch prepared by the method is high in yield, low in cost, and relatively safe and environmentally-friendly in method, and is used as an embedded material of insulin. Through determination of the characteristics in the sustained-release capsules, such as particle size, endothermic character, crystallinity and digestibility, the digestibility of the waxy corn starch nano particle-insulin sustained-release capsules in a stomach is low, and the waxy corn starch nano particle-insulin sustained-release capsules are mainly used for releasing drugs in intestines.

The invention provides a method for preparing aluminum polychlorid from byproducts generated in methyl diethyl phosphate production. The method comprises the following steps: (1) dispersing byproductsolid dregs into a solvent, analyzing, and collecting a solution; (2) cooling the solution with water, and separating aluminum chloride hydrate crystal; (3) hydrolyzing and polymerizing the aluminum chloride hydrate crystal, and aging, thereby obtaining the aluminum polychlorid. By adopting the method, solid dregs rich in sodium tetrachloroaluminate are adopted as a raw material, an inorganic polymeric flocculant, namely the aluminum polychlorid, is successfully prepared through steps of simple processes, and not only is the problem of waste disposal solved, but also a high additional value product can be successfully made.

The invention relates to a method for producing diethylformamide. The invention relates to a preparation method for continuous production of diethylformamide, which comprises the following steps: mixing diethylamine and methyl formate, converting to diethylformamide through an amidation reaction, and refining to obtain the finished product diethylformamide; wherein the mol ratio of diethylamine to methyl formate is 1.0-1.1: 1.0, space velocity of the liquid phase is 1.0-20.0h<-1>, the reaction temperature is controlled at 10-80 DEG C, and the reaction pressure (gauge pressure) is between normal pressure and 0.2MPa. The method has the advantages of high yield, because that high mol ratio of methyl formate to diethylamine is not required, diethylamine conversion rate is high, and the material consumption of whole process is little. The preparation method makes DEF production to serialization, so that the production efficiency of the process is increased, and the investment and production cost can be greatly reduced.

The invention relates to a cotton yarn scouring method by applying pectinase and neutral cellulase, and belongs to the technical field of cotton yarn dyeing and finishing pretreatment. The pectinase penetrates a cuticular and primary cell walls through micro holes and cracks on the surface of the cotton fiber, forms a composite with pectin, and reacts with the composite to allow the pectin to be converted into a water soluble product, so that the pectin is dissolved from the fiber. Along with dissolution of the pectin, a wax material structure adnascent with the pectin is loosened, is easily brought into contact with an added surfactant, emulsified and removed. The neutral cellulase can act on cellulose in the primary cell walls, and promote removal of the pectin, cotton wax, and other impurities by degrading the cellulose. Enzymes are mild in acting conditions, high in specificity and low in impurity removal rate and have selectivity, so that enzyme scouring can replace traditional scouring for cotton yarns with low requirements on pretreatment.

The invention belongs to the technical field of agricultural planting, in particular to an organic mesona blume planting method, which includes the steps of seedling cultivation, soil preparation of aseedbed, selection of cuttings, cuttage, seedbed management, soil preparation of a field, application of a base fertilizer, mulching film, planting, field management, harvesting and the like. The organic mesona blume planting method has the advantages of regular cultivation from seedling cultivation to transplanting cultivation, reasonable fertilization, proper pest control, scientific managementand cultivation of mesona blume, safety, environmental protection, innocuity and harmlessness, high survival rate of the planted mesona blume, good growth potential, strong resistance and fewer pestsand diseases; compared with the traditional mesona blume planting method, the organic mesona blume planting method greatly improves the yield and quality of the mesona blume; and moreover, the mesonablume obtained by organic planting is natural and pollution-free and does not have the problem of pesticide residue, so that the method has a wide market prospect in the popularization of the mesonablume planting method.

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 polyurea floor coating material, a preparation method and a use method thereof, and a polyurea resin, wherein the polyurea resin is a polyaspartic ester polyurea resin, and diethyl maleate and 3,3-dimethyl-4,4-diaminodicyclohexylmethane are used as raw materials and are subjected to a reaction for 70-74 h at a temperature of 60-80 DEG C according to a weight ratio of 1.0:1.55-1.60 to prepare the polyaspartic ester polyurea resin. According to the present invention, the polyaspartic ester polyurea resin can stably exist at a normal temperature; the polyurea floor coating material can be prepared by using the polyaspartic acid ester polyurea resin as the matrix component and adding the filler, the auxiliary agent and the like; and after the polyurea floor coating material and the HDI type curing agent are mixed according to a certain ratio, the advantages of good wear resistance, good aging resistance, good water resistance, controlled elasticity and high impactresistance can be 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 provides a method for preparing yuba by using a soybean water enzyme method emulsion and residue, and relates to the technical field of food processing. According to the present invention, the method mainly comprises: crushing, puffing, enzymolysis, deodorization, centrifugation, spray drying, blending, homogenization, heating, drying and other steps; and the method overcomes the disadvantages in the prior art, effectively improves the nutrient content of the traditional yuba product, improves the composition of the nutrients, reduces the waste of the bean residue during the production, improves the taste of the yuba, and reduces the bean odor, such that the obtained yuba has advantages of nutrition, delicious taste and the like.

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.

The invention discloses a soil remediation method for landscape ecological environmental protection and belongs to the technical field of soil remediation. The method comprises the following steps of:(1) preparing a soil remediation agent; (2) broadcasting the soil remediation agent and plowing soil; and (3) watering. The method disclosed by the invention is simple in process step, beneficial topopularization and application, low in labor intensity and application cost, safe and environment-friendly, and capable of effectively and fully repairing and improving the soil and promoting the recovery and enhancement of soil quality.

The invention discloses a preparation method of a rubber accelerator CBS, which synthesizes the rubber accelerator CBS by using an accelerator M, cyclohexylamine and water as raw materials, hydrogen peroxide as a main oxidant and sodium hypochlorite as a secondary oxidant, and comprises the steps of firstly, mixing the accelerator M and water, pulping, mixing with cyclohexylamine, slowly dropwiseadding hydrogen peroxide at a certain temperature, and after a certain amount of hydrogen peroxide is dropwise added, dropwise adding sodium hypochlorite, detecting the end point of the reaction by using starch potassium iodide and an ammonium sulfate reagent, stopping dropwise adding sodium hypochlorite when the reagent becomes blue, then carrying out solid-liquid separation, drying the separatedsolid to obtain a rubber accelerator CBS, and distilling the separated liquid to recover cyclohexylamine. The melting point of the rubber accelerator CBS prepared by the method reaches 99 DEG C, theyield of the CBS can reach 98.2, and the method adopts normal-pressure operation and is simple, easy to implement, high in operability and high in safety.

The invention relates to the technical field of chemical analysis, in particular to a method for determining quinoline insoluble substances in coal pitch, which comprises the following steps: continuously extracting toluene insoluble substances extracted by a toluene insoluble substance determinator in the coal pitch by using quinoline as a solvent to separate quinoline soluble substances from theinsoluble substances; and continuously washing the residual quinoline by using toluene, reducing the amount of the quinoline soluble substance, and calculating the content of the quinoline insolublesubstance according to the relationship among the toluene insoluble substance, the toluene quinoline soluble substance and the quinoline insoluble substance. According to the relationship between thetoluene insoluble substance and the quinoline insoluble substance, the determination steps of the toluene insoluble substance and the quinoline insoluble substance in the coal pitch are combined, so that the degree of harm to the environment and a human body during operation is reduced, the operation steps are simplified, and the manpower and time consumption is reduced.

The invention provides a preparation method of graphene, which comprises the steps of: obtaining an organic solution of graphene oxide; under the conditions of no oxygen and no water, adding an alkyl derivative of tungsten hexachloride and lithium into an organic solvent for reacting, then adding the organic solution of the graphene oxide for carrying out reduction reaction to obtain a graphene crude product; and thermally treating the graphene crude product by using microwaves to obtain the graphene. A low valent tungsten chemical reduction method and a microwave reduction method are combined, thus the preparation method of the graphene has the advantages of safety, environmental friendliness, thorough reduction, short time and high efficiency; and an SP2 hybridized structure of the graphene is repaired, so that the prepared graphene is low in oxygen content and high in conductivity.

The invention relates to a method for preparing anhydrous ethylenediamine from bisaminosilane by-product ethylenediamine hydrochloride, belonging to the technical field of fine chemicals. In the present invention, ethylenediamine hydrochloride and calcium oxide powder, the by-products of bisaminosilane, are stirred and neutralized at 80-115°C in the presence of ethylenediamine solvent, and directly distilled after the reaction to obtain a moisture content of 2%~ 3% water-containing ethylenediamine, then add water-containing ethylenediamine to calcium oxide powder under the action of a catalyst, stir and dehydrate at 100~115°C, and then distill to obtain anhydrous ethylenediamine with a moisture content of less than 0.2%. The invention has the advantages of simple equipment process, cheap and easy-to-obtain raw materials, safety and environmental protection, high product quality and low moisture content, can be directly used as raw materials, improves economic benefits, and is suitable for industrial production.

The invention discloses a green manure organic material combined application method for improving soil fertility, and belongs to the technical field of soil improvement. The method comprises the following steps: S1, treatment of organic materials; S2, planting of green manure; and S3, harvesting and turning over of green manure. The invention provides a green manure organic material combined application method for improving soil fertility. Soil organic matters, alkali-hydrolyzable nitrogen, rapidly available phosphorus, rapidly available potassium and soil microbial quantity are all higher than those of a basic soil sample after green manure organic material combined application by the method provided by the invention. The method is conducive to changing the physical and chemical properties of soil and improving the soil fertility, and the method is safe, environmentally friendly and beneficial to application and popularization.

The invention provides a quality-controllable isatis root extract and a method for identifying raw medicinal material isatis root contained in a Chinese patent medicine. The isatis root extract is detected by gas chromatography and at least contains the following characteristic peaks: peak 1: retention time of 9.46+ / -0.050 min, and peak 2: retention time of 10.95+ / -0.050 min; the gas chromatographic conditions are as follows: a chromatographic column is a DB-WAX capillary column; the carrier gas is nitrogen, and the flow rate of the carrier gas is 1-3 mL / min; the detector is an FID detector, and the detection temperature is 220-240 DEG C; the temperature of a sample inlet is 220-240 DEG C. Furthermore, the radix isatidis extract is used as a reference substance, the radix isatidis medicinal material in the Chinese patent medicine (such as wind-heat type common cold granules) can be accurately identified by adopting the gas chromatography condition, and the identification method is safe, environment-friendly, good in specificity, good in durability, good in selectivity and high in sensitivity; and a basis is provided for establishing the quality standard of the Chinese patent medicine containing the isatis root medicinal material.

The invention relates to a preparation method of a composite fabric with a hydrogen sulfide detection function. The preparation method comprises the steps that a silver nitrate solution is dropwise added into a dispersion solution of sulfonic acid silica gel at the temperature of 50 DEG C-60 DEG C under the stirring condition, stirring continues to be conducted for 30-60 min, the temperature is lowered to 30 DEG C-40 DEG C, stirring continues to be conducted for 30-60 min by keeping the temperature, and silver ion-modified sulfonic acid silica gel Ag-SSA is formed; a fabric is soaked into a NaOH solution with the concentration of 10-20 g / L, heating is conducted for 30-60 min at the temperature of 70 DEG C-90 DEG C, the fabric is washed, placed into an aqueous solution of the Ag-SSA, subjected to ultrasonic oscillation, taken out and air-dried, and the composite fabric with the hydrogen sulfide detection function is obtained. The preparation method is simple, easy to operate, safe, environmentally friendly and low in requirement on equipment performances; a chemical bonding agent is not adopted, and the fabric is soft and air-permeable and can be applied to a portable hydrogen sulfide detection garment.

The invention relates to a preparation method and application of a feed additive, in particular to a preparation method and application of an anti-hydropericardium syndrome feed additive. The invention solves the problems of high cost and poor effect of the existing method for preventing the hydropericardium syndrome by using the vaccine. The preparation method comprises the following steps of: 1,preparing an egg yolk antibody solution of the hydropericardium syndrome; 2, preparing egg yolk antibody freeze-dried powder of the hydropericardium syndrome; and 3, mixing the egg yolk freeze-driedpowder with astragalus polysaccharide, angelica polysaccharide and lycium barbarum polysaccharide to obtain the feed additive. The invention also discloses application of the feed additive in resisting the hydropericardium syndrome. The method is simple and low in cost, the death rate of chicken suffering from the hydropericardium syndrome is reduced to 8% or below in the application of resistingthe hydropericardium syndrome, and the effect is good.

The invention discloses a precoated sand lubricant and a preparation method thereof. The precoated sand lubricant consists of the following raw materials in parts by weight: 10-90 parts of calcium stearate and 10-90 parts of barium stearate. The lubricant disclosed by the invention has the characteristics that due to adoption of the barium stearate, the fineness of the product is increased, whichis up to about 500 meshes, and the melting point is up to 160 DEG C; while precoated sand is produced, the product can be directly added and used, the product can be well fused with the precoated sand, high adhesion is achieved, the precoated sand is not liable to cake and is good in flowability, the strength of the precoated sand is improved, the melting point and the flowability of the precoatedsand can be ensured under a condition of a relatively small addition amount, a good demolding effect is achieved, and a cast part is high in smoothness and precision. The method disclosed by the invention is safe and environmental-friendly, and free of process wastewater.

The invention discloses a powder catalytic material. The powder catalytic material is composed of FeCoGeMoO8. Particle size of the powder catalytic material is 0.10mu m to 0.25mu m. The powder catalytic material can photocatalytically degrade organic pollutants rhodamine B, diclofenac and decabromodiphenyl ether in water. At the same time, the invention discloses a preparation method of the powdercatalytic material. The preparation method comprises a solid-phase sintering method, a laser cladding method and a sol-gel-low-temperature self-combustion method, and a combination method of a tape-casting method and a solid-phase reaction method. The invention also discloses a preparation method of a graphite phase-containing carbon nitride composite nano catalytic material; a g-C3N4 / FeCoGeMoO8composite nano catalytic material is prepared, and can be used for photocatalytically removing the organic pollutants rhodamine B, diclofenac and decabromodiphenyl in the water.