138results about How to "Craft green" patented technology

The invention discloses a method for preparing a polyacrylonitrile (PAN)-base microporous membrane, which adopts a thermally induced phase separation (TIPS) technology and comprises the steps of: 1, preparing meltable acrylonitrile-base copolymer: adopting a mixture of acrylonitrile monomer and second monomer, which has the mixing molar ratio of 95:5-70:30, and preparing the meltable acrylonitrile-base copolymer through a polymerization technology; 2, preparing acrylonitrile-base casting film liquid: adding the copolymer and diluent into a reactor according to a weight ratio of 1:9-5:5wt%, heating to 140-230 DEG C, forming the uniform solution, then defoaming for 10-60 minutes, and producing PAN-base casting film liquid; and 3, preparing a microporous membrane: adopting a flat membrane preparation method which comprises of pouring the casting film liquid into a mould which is preheated to 150-230 DEG C, calendaring molding, cooling, solidifying, and extracting to obtain the product; adopting a hollow membrane preparation method which comprises of pouring the casting film liquid into a spinning machine, extruding at 150-230 DEG C, and extracting the diluent to obtain the product.

The invention discloses an advanced purification method for drinking water and a device thereof. The advanced purification process for drinking water is explored aiming at generally existing micro-polluted source water and the process combines a biological activated carbon filter and an ultrafiltration membrane biological reactor to purify the drinking water in an advanced way. After the raw water being treated enters the biological activated filter first, the particulate matters in the water being partly intercepted; pollutants like organic matters and ammonia nitrogen and so on are partly degraded and the water quality is purified to some degree; load of the ultrafiltration membrane biological reactor is reduced; the water in the filter is discharged into the ultrafiltration membrane biological reactor; the activated sludge in the reactor biologically treats the water from the filter and the pollutants ammonia nitrogen and the organic matters in the water are degraded again; at last, the water after two-level biodegradation is drawn form ultrafiltration membrane component by a draw-suck pump and the remarkable effect of removal of particulate matters as well as interception of two insects, daphnia, red worms, alga, bacteria and even virus of the ultrafiltration membrane can be brought into play.Therefore, the safe and clean drinking water with excellent quality can be prepared.

The invention provides a high-valued comprehensive utilization method of lithium slag, in particular to mineral waste residues obtained by lithium extraction of spodumene by a sulfuric acid method. The high-valued comprehensive utilization method comprises the following steps: firstly, carrying out size mixing and stirring on the lithium slag and enabling sulfate mineral in the lithium slag to bein a dispersed suspension state; secondly, carrying out desulfurizing treatment on a product obtained in the first step by using a physical ore dressing mode to obtain desulfurized slurry and tailingdiscarding produced slag and enabling the sulfur content of slag phase in the desulfurized slurry to be smaller than or equal to 0.5 percent; thirdly, under the condition that the magnetic field strength is 0.5 to 2.0T, carrying out magnetic separation on the desulfurized slurry obtained in the second step to obtain magnetic separation slurry and magnetic separation tailings and reducing the content of ferric oxide in the magnetic separation slurry to be smaller than or equal to 0.05 percent; then concentrating, filtering and drying the obtained magnetic separation slurry to obtain a pyrophyllite raw material for glass fibers. The treatment method of the lithium slag, disclosed by the invention, has the advantages of greenness and environmental protection, obvious economic benefits and capability of realizing the leap of high-valued recycling of the lithium slag.

A catalyst Cu-VSB-5 for hydroxylating phenol in water to become O-phenol and p-phenol is composed of the millipore nickel phosphate material VSB-5 as carrier and Cu as active center. Its preparing process features that the Cu is led into the arteries of carrier by ion exchange.

The invention belongs to the technical field of surface treatment and provides an oxidation process of an aluminum alloy titanium-color-imitated anode. The oxidation process is used for manufacturing a titanium-color-imitated aluminum alloy workpiece by the steps including wax-removing, water-washing, oil-removing, electrolytic polishing, stripping, ash-removing, oxidizing, electrolytic coloring, cold-sealing, coloring adjustment, hot-sealing, drying and the like. The oxidation process of the aluminum alloy titanium-color-imitated anode has the advantages that the whole process is green, environment-friendly and safe; each process step is simple; the yield and the qualification rate are improved; the production cost is lowered; the maintenance is easy; the treated aluminum alloy workpiece surface has a titanium-color-imitated color, a smooth and bright surface, a uniform color without mixed color; and an oxidation film and a base body are firmly combined, so that the surface hardness is higher and the corrosion resistance is good.

The invention discloses a low-pressure vacuum carburizing process. The low-pressure vacuum carburizing process comprises a temperature rising stage, a carburizing stage, a diffusing stage and a precooling stage. The temperature rising stage comprises the steps that a workpiece is vacuumized, and the vacuum degree is controlled within 1 Pa-20 Pa; and after vacuumizing is completed, heating is started, and the carburizing temperature ranges from 800 DEG C to 1050 DEG C. The carburizing stage comprises the steps that after the temperature of the workpiece reaches the set temperature of the process, acetylene gas is introduced into a furnace to maintain the carburizing gas partial pressure, which is named as a carburizing gas inflation pulse stage; after the carburizing gas inflation pulse stage is kept for a set time, vacuumizing is started, a certain time is kept under vacuum, which is named as a vacuumizing diffusion stage, and the carburizing gas inflation pulse stage and the vacuumizing diffusion stage are combined to serve as a carburizing pulse period; the whole carburizing stage is composed of a plurality of carburizing pulse periods; and when the carburized layer depth reaches the carburized layer depth set by the process, the carburizing pulse is stopped. The low-pressure vacuum carburizing process can effectively control the surface carbon content and the carburized layer depth of the workpiece, and the optimal carburizing effect of the workpiece is achieved.

The invention discloses a preparation method of a bio-based polyurethane flame-retardant coating. The bio-based polyurethane flame-retardant coating is prepared from the raw materials polyalcohol, diisocyanate, ammonium polyphosphate (APP), phytic acid, layered dihydroxyl compound, dimethylolpropionic acid, 1,4-butanediol and triethylamine by the steps of prepolymerization, neutralization, emulsifying and forming. In the invention, the phytic acid and layered dihydroxyl compound are pretreated and serve as flame-retardant additives which cooperate with an intumescent flame retardant APP for flame retardance of waterborne polyurethane so as to obtain the bio-based polyurethane flame-retardant coating with excellent comprehensive properties.

The invention relates to a PET (Polyethylene Terephthalate) reflective film, in particular to a method for removing the surface coating of a reflective PET aluminium plating film. The method is characterized by comprising the steps of: immersing the reflective PET aluminium plating film into a cleaning solution, and heating at the temperature of 40-100 degrees centigrade, rinsing by using clean water to remove the coating adhered on the PET surface, and airing to obtain the recyclable PET film. The recycled PET film is colourless and transparent on the appearance and has the intrinsic viscosity being about 0.723; the melt strength of the recycled PET film can satisfy requirements of PET extrusion-blown molding (bottle) or even extrusion blown film; and in the same extrusion technological conditions, the intrinsic viscosity of the PET film, which has a yellow appearance and is recycled by using the traditional method of hermetically boiling by using 20% caustic soda at high temperature for more than 24 hours, is reduced to about 0.564 and cannot satisfy the requirements of the extrusion-blown molding (bottle). The test in the invention proves that the method has the advantages of high-efficiency technology, time/water/electricity-saving performance, environment friendliness, zero discharge of waste water and practicability, is benefiical to realization of recycle of the reflective PET aluminium plating film, and is suitable for recycling and practical.

The invention provides a method for preparing nano-silver composite particles from emblica polysaccharide and belongs to the technical field of nanometer materials. The method comprises the steps of preparation of emblica polysaccharide and preparation of nano-silver. According to the prepared composite particles, the diameter, measured through bacteria inhibition experiments, of inhibition zones is 27.9+/-0.01 mm; a theoretical value and an experimental value are basically equal. This shows that the process for preparing AgNPs through a response surface optimization method is green and reliable.

Belonging to the technical field of nutritional health products, the invention discloses a preparation method of an ultralow molecular weight yak collagen peptide. The preparation method of the ultralow molecular weight yak collagen peptide includes: conducting dilute alkali soaking, high temperature and high pressure pulping, filtration, enzymolysis, concentration, spray drying and other processes on yak hide to obtain yak hide collagen peptide hydrolysate, the ultralow molecular weight collagen peptide (less than 300D) content of which is greater than 75%. The ultralow molecular weight yak collagen peptide prepared by the method provided by the invention can combine with a mannose receptor on macrophage to stimulate macrophage proliferation and enhance immunity.

The invention belongs to the field of flue gas purification, and discloses a method and a device for capturing carbon dioxide and simultaneously producing sulfuric acid by using sodium bisulfate. According to the method, a desulfurization byproduct (NaHSO4) is converted into H2SO4 by using a three-grid electrodialysis device, and CO2 in flue gas is captured in a cathode chamber. Under the action of electric field driving and an ion exchange membrane, HSO4<-> enters an anode chamber to generate H2SO4 and is concentrated, and Na<+> enters the cathode chamber to generate NaOH; and CO2 containinggas to be treated is introduced from the cathode chamber and is absorbed and captured by NaOH. The technology is simple, green and economical, carbon dioxide in the flue gas is captured in the comprehensive utilization process of the sodium bisulfate solution, good environmental benefits are achieved, updating and upgrading of the flue gas treatment technology in China are promoted, and the treatment pressure of desulfurized gypsum is relieved.

The invention relates to a supported platinum-cobalt catalyst and a preparation method thereof, and a method for producing pentanediol from biomass and biomass derivatives by using the supported catalyst. In the supported platinum-cobalt catalyst, different contents of platinum and cobalt are loaded on a carrier, and a weight ratio of platinum to cobalt is in a range of 1: 20 and 10: 1; and the carrier may be at least one selected from the group consisting of an acidic molecular sieve, activated carbon, ZrO2, Nb2O5 and Al2O3. The preparation method for catalyst is simple in process. The methodfor preparing pentanediol from biomass and the derivatives thereof by using the catalyst can realize high-selectivity preparation of 1,2-pentanediol or 1,5-pentanediol. Compared with traditional routes, the method provided by the invention has the obvious advantages of renewability of raw materials green, reaction process and the like, and has good application prospects.

The invention relates to a preparation method of a niobium diselenide (NbSe2) or niobium disulphide (NbS2)/carbon wear-resistant nano composite material. According to the preparation method, solid-phase method is adopted to prepare the niobium diselenide or niobium disulphide/carbon wear-resistant nano composite material. The preparation method comprises following steps: niobium powder, selenium powder or sulfur powder, and graphite powder are weighed and added into a dispersion medium, and an obtained mixture is mixed via magnetic stirring; the mixture is allowed to stand, a supernatant is removed, and an obtain product is dried; the product is heated at a temperature increasing speed of 10 DEG C/min, thermal preservation reaction is carried out, the product is collected, and is subjected to natural cooling to room temperature so as to obtain the NbSe2/graphite composite material or the NbS2/graphite composite material. Beneficial effects are that: the niobium diselenide or niobium disulphide/carbon wear-resistant nano composite material is prepared via solid-phase method, so that pollution caused by traditional liquid-phase method is reduced, and the preparation method is green and friendly to the environment; preparation difficulty of NbSe2 or NbS2 is reduced, nano material preparation cost is reduced effectively, and application prospect of NbSe2 or NbS2 in machinery industry is improved; the prepared niobium diselenide or niobium disulphide/carbon wear-resistant nano composite material possesses excellent antifriction performance.

The invention discloses a preparation method of an intumescent flame retardant synergist adopting saccharide derivatives and belongs to the technical field of flame retardant materials. The method comprises steps as follows: 1) a high-carbon graft polymer is prepared from chitosan graft polyacrylic acid; 2) N-acetylated chitosan graft polyacrylic acid is prepared, that is, solid chitosan graft polyacrylic acid is dissolved in an acetic acid aqueous solution, 1,2-propylene glycol is added, the mixture is left to stand at the room temperature for degassing for 1 days, and a degassed mixed liquid is obtained; an acetylated solution is slowly added to the degassed mixed liquid through a constant-pressure dropping funnel, the mixture is stirred at the room temperature to react for 5 h, the obtained solution is adjusted to be alkaline with 1 mol/L of sodium hydroxide after the reaction, and an N-acetylated chitosan graft polyacrylic acid aqueous solution is obtained; 3) solid N-acetylated chitosan graft polyacrylic acid, namely, the intumescent flame retardant synergist adopting saccharide derivatives, can be obtained through evaporative crystallization and drying. The preparation method adopts the simple and green process, and the prepared flame retardant synergist is efficient and environment-friendly.

The invention relates to a high-voltage all-solid-state lithium battery electrolyte and a preparation method therefor, and belongs to the field of solid-state electrolyte preparation. The electrolytecomprises 50%-85% of a lithium ion-conducting polymer, 15%-50% of lithium salt, and 0%-50% of a nano inorganic particle filler. The nanofiller contains one or two of SiO2, TiO2 and Al2O3. The lithiumion-conducting polymer is polyvinylidene fluoride (PVDF). The solid electrolyte prepared by the method adopts the PVDF with high voltage resistance and high ionic conductivity as an ion transport phase, and the prepared solid electrolyte has the advantages of good compatibility with the positive electrode, high voltage resistance and environmental friendliness.

The invention relates to a method for preparing nanometer chromium dioxide, belonging to the preparation field of inorganic materials, in particular to a method for preparing the nanometer chromium dioxide with an oxidation process; the method is characterized in that: chromium hydroxide hydrate is taken as raw material and is mixed with water according to the proportion that water/ chromium hydroxide hydrate (w/w) is 0.001-5 after being crushed by a ball-milling method or other ways, the initial oxygen pressure is 0.001-7MPa, constant reaction temperature with 350-390 DEG C generally is kept, and the mixture is reacted for less than 60min, so as to obtain purified nanometer CrO2. The method has simple process and the reaction condition is mild compared with the existing process, thereby having promotional value.

The invention discloses a method for preparing a Co3O4 nano material by Co2O3 powder, comprising the following steps: taking the Co2O3 powder as a precursor, wherein, if deionized water and ethanol are taken as solvents, the volume ratio of the deionized water to the ethanol of absolute ethanol is 9:1 to 0:10; or when the water solution of glucose is taken as the solvent, the mass fraction of theglucose is between 5-30 percent; mixing and stirring 0.1-0.2mol/ 1 Co2O3 powder and deionized water and ethanol or glucose aqueous solution solvent to form a uniform mixed material; putting the mixedmaterial in a container, then putting the container in a constant temperature cabinet, raising the temperature at a speed of 8.5-11.5 DEG C/min, and heating the mixed material within the temperaturerange of 120-160 DEG C for 6-24h; taking the container out for cooling to the room temperature; alternately washing a synthetic product by the deionized water and the absolute alcohol, and drying at low temperature to obtain the Co3O4 nano material. The Co3O4 nano material prepared by the method has easily controlled shape and granularity, high purity, good crystallinity and environment-friendly production process.

The invention relates to a method for synthesizing a drug, and concretely relates to a method for synthesizing berberrubine from catechol. The method comprises the following steps: carrying out a selective methylation reaction on the raw material catechol and 2-chloromethane to obtain o-methoxyphenol, and carrying out a selective formylation reaction to obtain 2-hydroxy-3-methoxybenzaldehyde; carrying out a methylenation reaction on catechol and 2-chloromethane to obtain piperidine, and carrying out a catalytic addition reaction on the piperidine and 2-chloroethylamine to obtain homopiperonylamine; carrying out a one-pot condensation hydrogenation reaction on the homopiperonylamine and 2-hydroxy-3-methoxybenzaldehyde under the action of a nickel-based catalyst, adding hydrochloric acid tothe obtained reaction product, cooling obtained crystals, and performing filtration to obtain a hydrochloride condensate; and refining the hydrochloride condensate, carrying out a cyclization reactionon the refined hydrochloride condensate and glyoxal under the action of a copper-based catalyst, refining the obtained reaction product, adding hydrochloric acid, performing cooling for crystallization, and filtering and washing obtained crystals to obtain the product berberrubine. The method realizes industrial total synthesis of the berberrubine, and opens up a chemical synthesis method for berberrubine drugs.