1867 results about "Tetramine" patented technology

The invention discloses a method for synthesizing a novel amphoteric slow-breaking quick-setting asphalt emulsifier, belonging to the technical field of organic chemical synthesis. The method comprises the following steps of: reacting oleic acid with polyamine to generate acid amide polyamine, and then adding chloroactic acid to generate halogenating reaction to prepare the asphalt emulsifier, wherein the polyamine is the mixture of diethylenetriamine and triethylene tetramine. The water solubility of the hydrophilic radical of the emulsifier synthesized by the process is stronger than those of like emulsifiers, thereby obviously lowering the critical micelle concentration (CMC) value, and the particles of the produced asphalt emulsion are finer, smoother and evener. The emulsifier can effectively prevent asphalt from settling, increases the storage stability of the asphalt emulsion, reasonably regulates the charge ratio, widens the selectivity on stone materials in the application of slurry seal construction, enables the mixing time to be sufficient, and has obvious quick-setting effect and improved project quality.

The invention discloses graphene aerogel and a preparation method thereof. The method comprises the following steps: (1) uniformly mixing graphene oxide dispersion liquid with an amine water-soluble compound to obtain graphene oxide mixed liquid, wherein the amine water-soluble compound is selected from one or more of diethylamine, ethidene diamine, propane diamine, butane diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, allylamine polymer and N,N'-bis(2-aminoethyl)-1,3-propane diamine; (2) irradiating the graphene oxide mixed liquid by high-energy rays under the anaerobic condition to obtain amino-modified graphene aerogel; (3) performing freeze-drying or supercritical CO2 drying to obtain the graphene aerogel. The graphene aerogel adopts a porous and macroporous structure, is relatively uniform in structure, and can be used for adsorbing an organic solvent; moreover, the preparation method is simple and environment-friendly.

The invention provides a metal surface oil and rust removal agent, and belongs to the technical field of cleaning agents. The metal surface oil and rust removal agent comprises the following components by weight: 2 to 4 parts of hydrochloric acid, 5 to 10 parts of phosphoric acid, 3 to 6 parts of oxalic acid, 3 to 5 parts of glacial acetic acid, 2 to 4 parts of citric acid, 3 to 4 parts of polyvinyl alcohol, 1 to 2 parts of hexamethylene tetramine, 2 to 3 parts of ethylene oxide, 1 to 2 parts of glyoxal, 2 to 3 parts of magnesium stearate, 2 to 4 parts of glycerol, 2 to 4 parts of thiourea, 2 to 4 parts of ammonium molybdate, 1 to 2 parts of polyaspartic acid, 2 to 4 parts of EDTA-Na2, 1 to 2 parts of ethylene diamine tetra sodium, 1 to 3 parts of poly maleic acid sodium, 2 to 3 parts of HEDPA, 2 to 6 parts of surface active agent and 70 to 100 parts of water. The metal surface oil and rust removal agent is convenient to use, and removes light rust for about 2 minutes and heavy rust for 6 to 7 minutes, and the oil removal rate can reach more than 97%.

The invention discloses a method for modifying epoxy resin through amino-terminated hyperbranched polymer-grafted graphene oxide. The method comprises the following steps: preparing graphite oxide from flake graphite utilized as a raw material by adopting a Hummers oxidation method, adding the graphite oxide into a beaker, adding distilled water and forming a graphene oxide mixed solution by virtue of ultrasonic waves; stirring for dissolving triethylene tetramine in N,N-dimethylformamide, raising the temperature to 55-65 DEG C, dropwise adding a mixed solution of methyl methacrylate and methanol, continuously raising the temperature to 80-120 DEG C and reacting for 6-10 hours to get an amino-terminated hyperbranched polymer; further adding the graphene oxide mixed solution and NaOH, regulating the PH value to be 5-10, performing ultrasonic dispersion for 2-8 hours at the temperature of 80-120 DEG C, evaporating the methanol, cooling to room temperature, adding water to precipitate a product, drying to get the amino-terminated hyperbranched polymer-grafted graphene oxide capable of toughening and modifying the epoxy resin. The method disclosed by the invention is wide in raw material source, simple in preparation process, pollution-free, lower in cost and beneficial to industrial large-scale production.

The invention discloses temperature-resisting salt-tolerant high-temperature self-cross-linking onsite polymerization water plugging gel which mainly consists of, by mass, main agent 4%-6%, cross-linking agent 1%-2% and the balance saline water. The main agent consists of a monomer A and a monomer B, wherein the monomer A is acrylamide, and the monomer B is ester matter. The cross-linking agent is one of or a mixture of two or more formaldehyde, phenolic resin, resorcinol, hexamethylene tetramine, paraformaldehyde and polyethyleneimine. The temperature-resisting salt-tolerant high-temperature self-cross-linking onsite polymerization water plugging gel spontaneously produces cross-linking polymerization under the condition of high temperature, an initiator is not added, the gelling time can be controlled to be 2 hours to 28 hours at the temperature of 120 DEG C, the water plugging gel can be directly prepared by high-salinity water, the gelling strength can be up to the visual inspection code level I, and synaeresis does not occur after 90 days. The temperature-resisting salt-tolerant high-temperature self-cross-linking onsite polymerization water plugging gel is low in initial viscosity, has the advantages of being few in components, good in instant solubility and pumping injection performance, high plugging strength, good in thermohaline stability, low in cost and the like and has wide application prospect on the aspect of high-temperature high-salinity oil reservoir profile control water plugging.

The invention discloses a visible and reversible fluorescent probe which comprises a cyanine fluorescent group and a benzothiazole group, and the general formula of the probe is shown in the description. The preparation method of the reversible fluorescent probe comprises the following steps: (1) dropwise adding phosphorus oxychloride into salicylaldehyde and paraformaldehyde for reaction, so as to obtain a product 1; (2) enabling the product 1 and hexamethylene-tetramine to react, so as to obtain a product 2; (3) enabling the product 2 and 2-aminobenzenethiol to react at the room temperature, so as to obtain a product 3; (4) enabling the product 3 and a compound 4 to react, so as to obtain the visible and reversible fluorescent probe. According to the ratiometric fluorescent probe provided by the invention, obvious color variation can be found out under natural light or an ultra-violet lamp, and the qualitative detection of sulfur dioxide gas can be implemented under natural light or a hand-held ultra-violet lamp, so that the operation is simple, high convenience and quickness are achieved, and the effect is remarkable; the fluorescent probe can effectively prevent interference from other impurities in samples, and is excellent in selectivity; in addition, the cumbersome pre-processing process of samples is avoided, so that the detection efficiency is high.

The invention provides a chemical etching liquid for metals. The chemical etching liquid comprises ferric chloride, hydrochloric acid, phosphoric acid, hydrogen nitrate, a corrosion inhibitor and a surface active agent. The corrosion inhibitor is at least one of hexamethylene tetramine, ethidene diamine, triethanolamine and heptadecane amide; and the surface active agent is one or two of sodium lauryl benzenesulfate and dodecyl alcohol amine. The invention further discloses a chemical etching method for metals; with the method, the metals are etched through spraying the etching liquid; and the etching liquid is provided by the invention. The etching liquid provided by the invention can be applied to surface etching of various metals, particularly stainless steel, copper and aluminum alloy; and since the metals can be etched with the same etching liquid, the consumption of equipment is reduced.

The invention relates to a method for preparing a self-emulsifying aqueous epoxy resin curing agent. The method comprises the following steps: taking triethylene tetramine and liquid-state epoxy resinCYD128 as raw materials and obtaining an epoxy resin CYD128-TETA addition compound by a synthetic reaction, wherein the mole ratio of the materials of the triethylene tetramine and the epoxy resin CYD128 is (1-2.2):1; then, dripping a mixed end sealing agent to the epoxy resin CYD128-TETA addition compound, neutralizing the secondary amine hydrogen salification of a generated product after end sealing by organic acid, and finally, diluting with water so as to obtain the self-emulsifying aqueous epoxy resin curing agent, wherein the chemical metering ratio of epoxy radicals in the mixed end sealing agent and primary amine hydrogen in the epoxy resin CYD128-TETA addition compound is 1:1. The invention adopts the common end sealing agent to carry out mixed end sealing, thereby enhancing theproperty of a condensate greatly, meeting the performance requirement of aqueous epoxy land lawn paint, and being widely applied to aqueous epoxy land lawns, steel product preservatives and woodenwarelacquer.

The invention relates to a preparation method of a formaldehyde-free active dye fixing agent. The compound prescription of the active dye fixing agent consists of two components, component 1 is chitosan quaternary ammonium salt produced by 3-chlorine-2-hydroxypropyl trimethyl ammonium chloride grafted with chitosan under ultrasonic, and component 2 is reactive fixing agent produced after reaction of one weight part of triethylene tetramine and three weight parts of epoxy chloropropane; the mass ratio of the component 1 and the component 2 is 1:3. The method of the invention can be applied to fixing treatment of cotton fabric dyed by active dye, can improve rubbing fastness, washing fastness and light fastness of the fabric without influence on the chromatic light and the fabric hand feel; the prepared fixing agent which is free from formaldehyde, nontoxic and environment-friendly is a novel printing and dyeing assistant.

The invention discloses a preparation method of a cobalt oxide anode material or an amorphous carbon coated cobalt oxide anode material, which comprises the following steps of: placing a conductive metal substrate in aqueous solution containing soluble cobalt salt and hexamethylene tetramine and carrying out heat preservation for 3h to 12h at a temperature of 80 DEG C to 150 DEG C to obtain the conductive metal substrate on which a cobalt hydroxide thin film is deposited; calcining the conductive metal substrate for 1h to 3h at a temperature of 200 DEG C to 400 DEG C to obtain the cobalt oxide anode material; and soaking the cobalt oxide anode material into aqueous solution of glucose, drying and calcining for 1h to 8h at a temperature of 300 DEG C to 500 DEG C to obtain the amorphous carbon coated cobalt oxide anode material. The preparation method has a simple preparation process and good reproducibility, is easy to implement, has an environmental-friendly production process and low cost and is beneficial to industrial production. The invention also provides the cobalt oxide anode material and the amorphous carbon coated cobalt oxide anode material. The cobalt oxide anode material and the amorphous carbon coated cobalt oxide anode material have high capacity retention ratios and good high-rate capabilities and are particularly suitable to use as a cathode electrode of a lithium ion battery.

The present invention discloses one kind of coated low-nitrogen sand and its preparation process. The coated low-nitrogen sand consists of phenolic resin 1.5-4.0 wt% of the material, hexamethylene tetramine in 0-6 wt% of the phenolic resin, lubricant in 3-7 wt% of the phenolic resin, and raw sand for the rest. It has greatly lowered hexamethylene tetramine consumption, low nitrogen content and capacity of ensuring the surface quality of the casting. During its heated formation, the thermosetting phenolic resin can speed the curing, raise the hardening rate and raising the hot strength of the sand mold.

The present invention provides a tectorial membrane sand solidifying system suitable for low-temperature reservoir sand prevention, which is a solidifying system with high reactive activity under water environment and low-temperature condition formed by mixing low-temperature tectorial membrane sand using complex novolac epoxy as plasteringagent and a water-soluble firming agent. Wherein liquid phenolic resin, liquid novolac epoxy and solid novolac epoxy are mixed according to a certain proportion, and then, are stirred evenly when temperature is raised to the softening point of the solid novolac epoxy to prepare the complex novolac epoxy; then, the complex novolac epoxy is used as the plasteringagent, and quartz sand, resin acceptor, intensifier and the like as raw material to prepare the low-temperature tectorial membrane sand is prepared by coating. The water-soluble firming agent is formed by mixing triethylene tetramine, quadrol, phenol, formaldehyde, acetone and the like. Under the function of the water-soluble firming agent, the low-temperature tectorial membrane sand can be solidified during the temperature range of 30 DEG C to 50 DEG C; the pressive strength and the permeability of the formed induration are high; the present invention has the strong abilities of temperature resistance, aging resistance and scour resistance; and the present invention can satisfy the needs of low-temperature reservoir sand prevention.

The invention relates to an adhesive remover and a preparation method thereof. The basic composition of the adhesive remover formula is as follows in percentage by weight: 12-25% of fatty alcohol-polyoxyethylene ether sodium sulfate and fatty alcohol-polyoxyethylene ether silane, 20-30% of alkylphenol polyoxyethylene ether, 4-5% of ethylene oxide / propane segmented copolymer, 5-7.9% of sodium chloride, 10-12% of triethyl phosphate and dimethyl adipate, 5-10% of tricarboxyl triethylamine, triethylamine, diethanol amine, EDTA, urea, triethanolamine and hexamethylene tetramine, 2-10% of ethylene glycol, butyl cellosolve, propylene glycol methyl ether, ethanol, isopropanol, benzyl alcohol and methyl isoamyl ketone and 0.1-42% of deionized water. Compared with the prior art, the invention has the advantages that the adhesive remover is aqueous and low irritating, is wide in application range, can rapidly remove various trade mark adhesives, eliminate adhesiveness, degrease, remove adhesive and deliquate adhering oil stain in the aspect of removing advertising posters on the surfaces of glass, ceramics, marbles, stainless steel, etc. The invention also provides an environment-friendly and safe method for preparing the adhesive remover.

The invention relates to a non-noble metal fuel cell oxygen reduction electrocatalyst which is a product obtained by a method comprising the steps of: (1) pretreatment of acetylene black; (2) mechanical grinding: mixing cobalt chloride (CoC12. 6H2O), nitrogen source (melamine or hexamethylene tetramine) and carbon black (acetylene black or Vulcan XC-72R) which have the mass ratio of 1: 2: 10 into a mortar for mechanical grinding for 30min until even dispersion; and (3) heat treatment: adopting a way of sectional type temperature rise under the nitrogen protection, namely, maintaining for 10min when raising 100 DEG C at every time, then raising the temperature again, and so on; finally, maintaining for 1-5h at the required temperature (500-900 DEG C), and stopping heating; and naturally cooling to the room temperature, and then closing nitrogen. The non-noble metal fuel cell oxygen reduction electrocatalyst is low in the price of raw materials, and greatly reduces the preparation cost of oxygen reduction catalyst. The method is simple, convenient and easy, and is suitable for large-scale production and preparation of the catalyst.

A novel polyimide which retains the characteristics of polyimides, that is, excellent heat resistance, electrical insulation and chemical resistance, of which dielectric constant is lower than those of the known polyimides, as well as a composition containing the same and a process for producing the same, is disclosed. The polyimide of the present invention is a cross-linked polyimide having a dielectric constant of not more than 2.7, which was produced by polycondensing (a) tetramine(s), (a) tetracarboxylic dianhydride(s) and (an) aromatic diamine(s) in the presence of a catalyst.

The invention provides a carbon-coated Li3VO4 lithium ion battery anode material. The anode material is prepared according to the following method: employing vanadium pentoxide, lithium carbonate and hexamethylene tetramine as raw materials, performing a hydrothermal reaction to obtain an intermediate-phase solution, then adding citric acid into the intermediate-phase solution, mixing uniformly, and drying to obtain a solid product, and sintering the solid product in a high-temperature atmosphere, so as to obtain the lithium ion battery anode material with the Li3VO4 surface coated by amorphous carbon. The anode material is granular, and has the particle size of 90-120 nm. The carbonization effect of citric acid is utilized for fining Li3VO4 particles and uniformly coating the particle size with a carbon layer. The synthetic technology simple and easy to operate, and the material preparation cost is low. The prepared sample Li3VO4 is a uniform nano-particle, and has the dimension of 90-120 nm. In the obtained sample, the Li3VO4 particle surface is uniformly coated by amorphous carbon. The prepared material is high in charge / discharge capacity and excellent in cycle performance.

The invention provides a normal-temperature sealer for an anodic oxide film of aluminum and aluminum alloy. The sealer is characterized by comprising the following components in concentration (g / L): Ni<2+>0.8-1.3, F<-> 0.4-0.8, triethanolamine 0.1-5.0, hexamethylene tetramine 0.1-1.0, sodium dodecanesulphonate0.001-0.1, bloom inhibitor 0.01-2.0 and the balance of water. The invention also discloses a sealing method for the sealer. Compared with the prior art, the sealer has the advantages of low cost, easy preparation, easy operation, and great improvement on the surface anti-pollution ability, the anti-corrosion property and the electric insulativity of the anodic oxide film of the aluminum alloy.

The invention discloses a reticulate nanopore zinc-oxide micron hollow sphere and a preparation method thereof. The hollow sphere of the invention comprises the following materials: the surface of the zinc-oxide micron hollow sphere is provided with reticulate nanopore, wherein, the diameter of the hollow sphere is 1 to 10mum and the aperture of the nanopore is 50 to 100nm; the method of the invention comprises a liquid-phase chemical method, particularly (a) according to the mole ratio that zinc salt: chelating agent: sodium citrate: water is equal to 1:(0.5-1.5):(0.05-0.15):(50-150), the materials are weighted, then put into a vessel, stirred, dissolved and kept warm for three hours at the temperature of 70 to 100 DEG C under the sealing state to obtain a product; (b) the obtained product is filtrated, washed more than one time and heated for 1 to 3 hours at the temperature of 300 to 500 temperature, and the reticulate nanopore zinc-oxide micron hollow sphere is obtained; the zinc salt is zinc nitrate or zinc acetate or zinc chloride or zinc sulfate, and the chelating agent is urea or ammonia or hexamethylene tetramine or ammonium hydroxide. The hollow sphere can be widely applied to the fields of drug transportation, chemical reaction carrier, cosmetics, coating material, catalytic and photocatalysis material, etc.

The invention discloses a preparation method of zinc oxide / cuprous oxide heterojunction, aiming at solving the technical problem that the existing preparation method of zinc oxide / cuprous oxide nano-heterojunction photocatalytic material is complicated in technology. The preparation method adopts the technical scheme comprising the steps of: carrying out ultrasonic cleaning on a flexible indium tin oxide (ITO) substrate; weighing Zn (NO3)2. 6H2O and hexamethylene tetramine; dissolving the weighed Zn (NO3)2. 6H2O and hexamethylene tetramine into deionized water to prepare electrolyte; carrying out electrochemical deposition on an electrochemical working station, wherein the flexible ITO substrate is a working electrode, and a platinum sheet is a counter electrode; controlling the deposition temperature to be 40-70 DEG C and the cross potential to be -1.3 to -1.6V to obtain a ZnO nanorod array; washing and drying; adopting CuSO4 and citric acid to prepare electrolyte; carrying out electrochemical deposition on the electrochemical working station, wherein the flexible ITO substrate is the working electrode, and the platinum sheet is the counter electrode; controlling the deposition temperature to be 40-70 DEG C and the cross potential to be -0.5 to -0.6V; and depositing Cu2O on a ZnO nanorod to obtain the ZnO / Cu2O heterojunction. The zinc oxide / cuprous oxide heterojunction is prepared by an electrochemical deposition method under the conditions of the flexible ITO substrate and the low temperature, so that the method is simple.

The invention relates to a body anti-corrosive preservation solution. The raw materials in percentage by weight of the preservation solution are: 10 to 40 percent of glycerol, 10 to 70 percent of ethanol, 1 to 20 percent of metacetonic acid, 0.1 to 20 percent of hexamethylene tetramine, 0.2 to 10 percent of 5-chloro-2-methyl-4-isothiazoline-3-ketone, 0.1 to 1 percent of peppermint oil and the balance being water. The application mode of the preservation solution comprises the following steps: the anti-corrosive preservation solution is injected into the digestive system of a body from the oral cavity or the nose and the throat of the body; the anti-corrosive preservation solution is injected through an aortic arch, a brachial artery or a femoral artery; and the anti-corrosive preservation solution can also be used to wipe the surface of a body by a tampon dipped in the preservation solution. The body anti-corrosive preservation solution is nontoxic and harmless to an operator and is easy to operate; moreover, the preservation solution has no influence on the environment and excellent anti-corrosive effects, and can ensure that a body maintains a natural state and softness in a natural state (at room temperature) for 5 to 12 days. In addition, the preservation solution can be used repeatedly and has a simple preparing method, easily obtained raw materials and strong maneuverability; moreover, the preservation solution has convenient practical application and is propitious to popularize and use.

The technological process of preparing spherical Li4Ti5O12 as negative material for lithium ion cell includes: hydrolyzing TiCl4 to form sol A; dissolving hexamethine tetramine and urean in water to prepare solution B; adding solution B into sol A to prepare mixed sol; dropping the mixed sol into kerosene medium and heating to convert the sol into deposited gel; separating, washing, ageing and drying to obtain spherical precursor; adding lithium and performing heat treatment to prepare spherical Li4Ti5O12. When doping, the dopant ion is added into sol A. The technological process is simple and easy to dope carbon to raise the conductivity of the product, and has high application value, and the prepared Li4Ti5O12 is spherical and high in bulk density.

The invention discloses a titanium dioxide sol and a coating type denitration catalyst. The titanium dioxide sol is prepared from a titanium dioxide precursor, a dispersing agent, organic chelating agents, alcohol solvents, deionized water and auxiliaries, wherein the organic chelating agents include one or two of acetylacetone, tert-butyl ketone and 1,3-diphenyl-1,3-propanedione, the alcohol solvents include one or two of methanol, ethanol, isopropanol and n-butanol, and the auxiliaries include one or two of methylcellulose, polyethylene glycol-400, sodium dodecyl sulfate, hexamethylene tetramine, tetrahydrofuran and ethanolamine. A substrate of the coating type denitration catalyst is made of cordierite honeycomb ceramics, and the substrate is coated with active components of a vanadium-tungsten impregnation solution, an iron-cerium impregnation solution or a manganese-cerium impregnation solution with the titanium dioxide sol as a carrier. The grain size of the titanium dioxide sol is at the nanometer level. A coating formed by the coating type denitration catalyst has high bonding fastness, coating capacity and solid content.

Epoxy cement group road nonskid paint consists of three components, namely epoxy latex, a curing agent and powder materials. The curing agent is prepared from triethylene triamine or triethylene tetramine and versamid resin which are mixed. The powder materials consist of silicate cement, quartz sand and a water reducing agent. The invention also discloses a preparation method for the epoxy cement group road nonskid paint. The epoxy cement group road nonskid paint saves resources with healthfulness, environmental friendliness, safety and convenience during use.

The invention relates to a HAS composite plug removal process, comprising two parts that: firstly, compound acid is injected into a wellhead of a water injection well by adopting a high pressure pump; secondly, after the interval between 5 to 24 hours, an active agent is injected in by using a high concentration slug or an instillation device, wherein the compound acid is formed by the following composition in percentage by weight: 10 to12 percent of hydrochloric acid, 1 to 2 percent of hydrofluoric acid, 8 to 10 percent of fluoboric acid, 2 percent of glacial acetic acid, 2.0 percent of corrosion inhibitor, 0.1 to 0.2 percent of citric acid, 4.0 to 6.0 percent of isobutanol and 68 to 72 percent of water; the active agent is formed by the following composition in percentage by weight: 0.1 to 0.2 percent of negative nonionic surfactant, 0.3 to 0.5 percent of sodium chloride, the balance being water; the corrosion inhibitor is formed by compositely preparing hexamethylene tetramine and formaldehyde in the proportion of 1 to 1; the negative nonionic surfactant is formed by compositely preparing petroleum benzene sulfonic acid sodium salt and fatty acid alkanolamide in the proportion of 1 to 1. The composite plug removal agent has the effect in the comprehensive plug removal for near bore zones and the deep parts of oil layers, which is long in valid period and obvious in plug removal effect.

The invention relates to an n-shaped titanium oxide nanotube / p-shaped diamond heterojunction photocatalytic material and a preparation method, belonging to the technical field of photocatalytic materials and the preparation thereof. The photocatalytic material is formed by growing an n-shaped TiO2 nanotube with an anatase structure on a p-shaped diamond. The preparation method comprises the following steps of: 1. growing a boron-doped p-shaped polycrystalline diamond film or boron-doped p-shaped diamond single crystal; 2. sputtering a ZnO seed crystal layer on a p-shaped diamond; 3. growing a ZnO nano rod on the ZnO seed crystal layer in the mixed water solution of zinc acetate and hexamethylene tetramine; and 4. growing the n-shaped TiO2 nanotube on the p-shaped diamond in the mixed solution of ammonium fluorotitanate and boric acid by using the ZnO nano rod as a template. The.TiO2 nanotube is prepared on the diamond by utilizing a liquid-phase synthesis method, thus heterojunction with excellent photocatalytic performance is obtained; and the method is simple, has low cost, and is suitable for large-scale production and application.

The invention discloses an organic amine compound absorbent for removal of carbon dioxide in fire coal flue gas; the organic amine compound absorbent comprises the following components: by mass, 10%-45% of a main absorbent component, 0-10% of an assistant absorbent component, 0.01%-6% of a corrosion inhibitor, 0.01-3% of an antioxidant, 0-5% of a defoaming agent and the balance of water; wherein the main absorbent component comprises the following components: account for the total mass percentage of the organic amine composite absorbent, 3%-20% of monoethanolamine MEA, 0-12% of 2-amino-2-methyl-1-propanol AMP, 1%-15% of sun of piperazine PZ and N-aminoethyl piperazine AEP and 1%-12% of sum of aminoethyl ethanolamine AEEA and N-methyl monoethanolamine MMEA; and the assistant absorbent comprises one or a plurality of component selected from the group comprising diethanol amine DEA, diethylenetriamine DETA, triethylene tetramine TETA, N-methyldiethanolamine MDEA, sulfolane and tertbutylaminoethoxyethanol TBEE. The organic amine compound absorbent has the advantages of good stability, large absorption capacity, high purification degree, low regeneration energy consumption, good desorption effect, great reduction of degradation loss of the compound absorbent in the process of using, and the like.

The invention discloses zinc oxide hollow microspheres and a preparation method thereof. The invention relates to an inorganic nano material, and provides the zinc oxide hollow microspheres and the preparation method thereof. The zinc oxide hollow microspheres are made of wurtzite structural zinc oxide with powder diffraction standard joint committee number 36-1451, the diameters of the microspheres are 5 to 8 microns, and the thicknesses of the sphere walls are 0.5 to 1 micron. The preparation method comprises the following steps of: dissolving zinc nitrate hexahydrate and hexamethylene tetramine into water to obtain solution A, and adding sodium citrate into the solution A to obtain solution B; putting the solution B into a closed high pressure reactor, and putting the high pressure reactor into a drying oven to perform hydrothermal reaction; and after the hydrothermal reaction, cooling the reaction product to room temperature, opening the high pressure reactor, and filtering, washing and drying the sediment to obtain the zinc oxide hollow microspheres. The preparation method has the advantages of simplicity, convenience, low temperature, high yield and low sample dislocation density; and the zinc oxide hollow microspheres have broad application value in the fields of medicament release, photocatalysis, dye-sensitized solar cells and the like.

The invention provides an inhibitor for pyrrhotite flotation. The inhibitor comprises sodium carbonate, sodium pyrosulfite and triethylene tetramine, pyrrhotite in pulp can be effectively and selectively inhibited, meanwhile basically no affect is brought to the flotation of pentlandite and copper pyrite, and the inhibitor is particularly suitable for the flotation and separation of minerals difficult to select such as high content of pyrrhotite and low quality of cooper-nickel; and the invention further provides a preparation method and an application method of the inhibitor for pyrrhotite flotation, the operations are extremely simple and convenient, and excellent industrial prospect is provided.

The invention discloses a production method of a cellulose-based hydrogel adsorber used for treating heavy metal wastewater. The production method of the cellulose-based hydrogel adsorber used for treating the heavy metal wastewater comprises the following steps of placing cotton yarn in cellulose dissolving liquid, and after stirring and dispersing are conducted, conducting freezing to obtain a cellulose solution; adding sodium hydroxide into a mixed solution of dimethyl sulfoxide, epoxy chloropropane and triethylene tetramine, and conducting stirring to obtain a modifying solution; adding a polyvinyl alcohol solution into the cellulose solution, mixing the polyvinyl alcohol solution and the cellulose solution evenly, sequentially adding ammonium persulfate, an acrylic acid monomer and N,N'-Methylenebis(2-propenamide), and conducting stirring and polymerization to obtain a gelatinous polymer; and placing the gelatinous polymer into the modifying solution, conducting soaking, carrying out a heating reaction, and washing a product, which is obtained after the reaction is completed, with alcohol and water repeatedly to obtain the cellulose-based hydrogel adsorber used for treating the heavy metal wastewater. According to the production method of the cellulose-based hydrogel adsorber used for treating the heavy metal wastewater, a large number of amino groups are introduced to the surface of the cellulose-based hydrogel adsorber which is produced by means of cellulose in the waste cotton yarn so that heavy metal ions in the heavy metal wastewater can be efficiently and fast removed, and double purposes of using waste for treating waste are achieved.