68 results about "Tetramine" patented technology

The present application relates to a kind of carbon dioxide mineralization method and carbon dioxide mineralization device.The carbon dioxide mineralization method includes the following steps: mixing absorption liquid and industrial solid waste at room temperature, obtain mortar;Make mortar solid-liquid separation, obtain clear liquid and thick slurry;Carbon dioxide in flue gas is absorbed by clear liquid, obtain carbon-rich absorption liquid;Carbon-rich absorption liquid and thick slurry occur mineralization reaction at 180 DEG C-220 DEG C, obtain mineralized slurry;Make mineralized slurry solid-liquid separation, obtain mineralized ash and mineralized clear liquid;Wherein, absorption liquid includes inorganic base and organic base, organic base includes monoethanolamine, diethanolamine, triethanolamine, 3-methylaminopropylamine, N-methyl diethanolamine, piperazine, diethylene triamine, triethylene tetramine, tetraethylene pentamine and 2-amino-2-methyl-1-propanolamine at least two kinds.The method greatly improves CO2 capture rate and CO2 utilization rate, and organic base consumption is less, absorption liquid regeneration energy consumption is low, and overall economy is good.

The invention relates to the technical field of zinc hydrometallurgy, and discloses an analysis method for measuring high cobalt content by an EDTA complexing back titration method, which is based on the following steps: oxidizing Co < 2 + > into Co < 3 + > by using potassium nitrite in an acetic acid medium to form cobalt potassium nitrite precipitate so as to realize separation of cobalt and interfering ions, dissolving the precipitate, complexing with excessive EDTA, and performing back titration by using a zinc standard solution. Xylenol orange is used as an indicator, and determination is completed at room temperature in a hexamethylenetetramine buffer system with the pH value being approximately equal to 5.8. Coexisting ion interference is effectively eliminated through tartaric acid, sodium fluoride, thiourea and other masking agents, the method has the advantages of being easy and convenient to operate, sensitive in end point, high in accuracy and low in cost, and the requirement for conventional analysis of high-cobalt materials can be met.

The invention discloses a magnesium carbonate crystal prepared based on hexamethylenetetramine and a preparation method thereof, and belongs to the technical field of magnesium carbonate materials. The preparation method comprises the following steps: dissolving urea and magnesium chloride, adding hexamethylenetetramine, oscillating in water bath ultrasonic to fully react, then transferring the reaction system into a hydrothermal reaction kettle to perform hydrothermal reaction, and washing and drying a reactant to obtain magnesium carbonate crystals. According to the invention, magnesium chloride and urea are taken as raw materials, hexamethylenetetramine is taken as an additive, the nucleation-growth process is directionally regulated by the hexamethylenetetramine additive, and an optimized reaction process is adopted, so that the magnesium carbonate crystal with high purity, good crystallinity and an excellent pore structure is successfully synthesized; the prepared magnesium carbonate crystal has an optimized porous structure. According to the structure, the mass transfer efficiency is effectively improved, diffusion and transmission of substances in the material are facilitated, and the preparation method is simple and has wide application potential.

This invention proposes a method for preparing and applying an indium sulfide photocatalytic material with specific vacancies. The method involves forming a first solution with ethanol and deionized water; dissolving InCl3·4H2O and thioacetamide, or InCl3·4H2O, thioacetamide, and hexamethylenetetramine, in the first solution by stirring; obtaining a clear solution; reacting the clear solution at a constant temperature; cooling after the reaction; and collecting the product by centrifugation; washing the product; and drying it at a constant temperature; finally, obtaining the photocatalytic material with specific vacancies. This invention introduces vacancies into In2S3, thereby regulating the surface active sites, enhancing its light utilization efficiency and the separation and transfer ability of photogenerated carriers, and improving the photocatalytic activity of N2 to NH3 reduction.

A method of cleaning a fouled reverse osmosis (RO) membrane using a comb-shaped polymer which includes dissolving the comb-shaped polymer and a base in water to form a solution, contacting the fouled RO membrane with the solution to produce a cleaned RO membrane. The comb-shaped polymer includes reacted units of poly(isobutylene-alt-maleic anhydride) and an oligoethylene amine where, the oligoethylene amine is triethylenetetramine, tetraethylene pentaamine, or pentaethylenehexamine.

The invention discloses a modified molecular sieve for PSA nitrogen preparation and a preparation method and application thereof, and belongs to the technical field of gas separation materials. The modified molecular sieve comprises a silicon-aluminum molecular sieve matrix, a transition metal oxide and an organic amine compound; the molar ratio of SiO2 to Al2O3 of the silicon-aluminum molecular sieve matrix is 5-8; the transition metal oxide is a compound of copper oxide and cobalt oxide, the mass ratio of the copper oxide to the cobalt oxide is 2: 1, and the total loading amount of the transition metal oxide is 3%-8% of the mass of the silicon-aluminum molecular sieve matrix; the organic amine compound is ethylenediamine or triethylene tetramine, and the loading capacity of the organic amine compound is 1-5% of the mass of the silicon-aluminum molecular sieve matrix. The modified molecular sieve takes a silicon-aluminum molecular sieve as a matrix, bifunctional modification is performed by loading transition metal oxides (copper oxide and cobalt oxide) and an organic amine compound, and the synergistic effect of the modified molecular sieve and the silicon-aluminum molecular sieve is optimized, so that the limitation of the prior art is broken through, and the sustainable development of the ammonia synthesis industry is promoted.

The present invention describes a new crystalline form of triethylenetetramine tetrachloride which has improved room temperature stability over known forms and over the dichloride salt. The new crystalline form is characterised by having peaks in an XRPD spectrum at 22.9, 25.4, 25.8, 26.6, 34.6 and 35.3±0.1° 2θ and Raman shifts 943, 1173, 1527 and 1612±5 cm−1. The crystalline form of triethylenetetramine tetrachloride is useful in the treatment of Wilson's disease.

The invention discloses anti-cracking and anti-corrosion concrete and a preparation method thereof, and relates to the technical field of concrete preparation, the concrete comprises the following raw materials by weight: 350-400 parts of cement, 80-90 parts of fly ash, 170-190 parts of water, 5-8 parts of a water reducer, 1100-1200 parts of gravel, 700-800 parts of medium sand, 3-5 parts of a modified filler, 8-10 parts of a modified additive, and 3-5 parts of triethylene tetramine. In the raw material mixing process, epoxy groups in the modified additive and epoxy groups on the surface of the modified filler can react with amino groups on triethylene tetramine to form a cross-linked network, and the modified filler contains iron-based layered double hydroxides which can quickly absorb chloride ions, so that the corrosion resistance effect of the concrete is improved, and the service life of the concrete is prolonged. The modified additive forms a polysiloxane network, so that a hydrophobic network is formed in the concrete, and the anti-permeability effect of the concrete is effectively improved.

The invention discloses a method for measuring the calcium content of a seamless pure calcium line, and aims to solve the problem of inaccurate detection of a sample containing an oxide layer. According to the method disclosed by the invention, a two-step acidolysis strategy of diluted hydrochloric acid-hexamethylenetetramine and glacial acetic acid warming is adopted, so that comprehensive and rapid dissolution of metal calcium and calcium oxide and super-strong protection of iron sheets are realized; a gradient alkalization masking strategy of triethanolamine-ammonia water-potassium hydroxide is adopted, so that deep masking of interference ions and an acute titration end point are realized. The method has the advantages of good selectivity, strong anti-interference capability, high accuracy and simple operation, and is especially suitable for accurate quality evaluation of seamless pure calcium line products in iron and steel enterprises.

The application discloses a carbon dioxide capturing agent and a preparation method and application thereof, relates to the technical field of chemical synthesis, and the formula of the carbon dioxide capturing agent comprises the following components: diethanolamine 2-15 mL, triethylenetetramine 6-20 mL, tetraethylenepentamine 20-80 mL, ethanolamine 2-15 mL, triethanolamine 5-20 mL, methanol 10-50 mL, polyethyleneimine 1-10 mL, piperazine 1-12 g and an initiator 2-10 mL. The carbon dioxide capturing agent can simultaneously meet the three conditions of efficient capturing, low-cost absorption and normal application (temperature 15 DEG C-30 DEG C, pressure 101 kPa), and can very properly compatibly solve the bottleneck problem of the development of the CCUS technology, i.e. economic benefits and cost.

The application provides a nanocrystalline magnetic core and a preparation method thereof, and the preparation raw material of the magnetic core comprises the following components in parts by weight: Nd2Fe 14 B magnetic powder 30-35 parts; Fe 75 CuNb2V2Si 15 B9 nanocrystalline magnetic powder 20-30 parts; hydrogenated bisphenol A type epoxy resin 15-30 parts; polypropylene 10-20 parts; hexamethylenetetramine 5-10 parts as a curing agent; triallyl isocyanurate 6-15 parts as a crosslinking agent. 75 CuNb2V2Si 15 After the annealing pretreatment of the B9 nanocrystalline magnetic powder, the ball milling and the reannealing are beneficial to improving the dispersity of the Nd2Fe 14 B magnetic powder, and further improving the anisotropy of the whole magnetic core and the magnetic permeability of the nanocrystalline magnetic core.

The invention belongs to the technical field of metal surface treatment, and particularly discloses a corrosion inhibition inhibitor for hydrochloric acid pickling and a preparation method and application thereof, and the corrosion inhibition inhibitor comprises hexamethylenetetramine, ferric chloride, ethyl silicate, glacial acetic acid, dibutyl phthalate, sodium hydroxide, ethylenediamine tetraethanol and desalted water. The inhibitor can form a protective film on the metal surface, effectively inhibits corrosion of acid liquor to a strip steel matrix, reduces iron loss, hydrogen embrittlement and acid mist emission, is suitable for a cold-rolled strip steel hydrochloric acid pickling process, and has the advantages of being small in addition amount, high in inhibition efficiency, environmentally friendly and the like.

The application provides a double metal Schiff base complex, a preparation method thereof and application of the double metal Schiff base complex in catalyzing synthesis of cyclic carbonate. A tetraamine benzene compound containing a substituent group and a salicylaldehyde compound containing a substituent group are dissolved in an organic solvent A, a metal source MZ is added, an organic acid B is added as a catalyst, and the reaction is heated to reflux to obtain the double metal Schiff base complex. The double metal Schiff base complex prepared by the application can weaken the problem of self-polymerization of an active center to a certain extent by adjusting the overall electron cloud density through an X group. The double metal Schiff base complex is used as a catalyst for preparing a cyclic carbonate by reacting carbon dioxide with an epoxide compound, and the catalyst has high activity, good selectivity and is easy to separate from the product; the reaction condition is mild and the process is simple. Moreover, the application can realize one-step production, is simple to prepare and can realize large-scale production.

The present invention relates to a process for the preparation of an aromatic amine by hydrogenation of an aromatic nitro compound, comprising the following steps: (I) providing a copper tetramine salt-based impregnation catalyst, in particular an impregnation catalyst obtainable by the incipient wetness method, comprising a metal or metal oxide on a support as a hydrogenation catalyst. At least metallic or oxidic copper (in particular CuO) is present and the mole fraction of Cu based on all metals present is in the range of 075 to 1, and wherein the support comprises shaped silicon-dioxide shaped bodies or silicon-carbide shaped bodies; (II) optionally, activating the hydrogenation catalyst by treating with hydrogen in the absence of the aromatic nitro compound; and (III) reacting the aromatic nitro compound with hydrogen in the presence of the, optionally activated, hydrogenation catalyst to obtain the aromatic amine.

This invention relates to pharmaceutical formulations comprising triethylenetetramine tetrahydrochloride (TETA·4HCl). Specifically, it relates to pharmaceutical compositions which are suitable for once a day administration to a subject in need of treatment.

The invention discloses a preparation method and application of europium-doped zinc oxide graphene composite filler. The preparation method comprises the following steps: (1) dissolving zinc nitrate and europium nitrate in deionized water; adding hexamethylenetetramine to obtain a mixed solution; transferring the mixed solution into a high-pressure reaction kettle, and reacting at 120-200 DEG C; after cooling, centrifuging, washing and carrying out vacuum drying to obtain Eu-ZnO NRs powder; (2) adding graphene oxide into ethylene glycol, and performing ultrasonic dispersion to form dispersion liquid; adding Eu-ZnO NRs powder, and carrying out ultrasonic mixing; adding hydrazine hydrate, and carrying out reflux reaction at 65-95 DEG C; and centrifuging, washing and drying to obtain the europium-doped zinc oxide graphene composite filler. The europium-doped zinc oxide graphene composite filler disclosed by the invention is used for ship anticorrosive paint, a conductive network can be constructed, the corrosion resistance is enhanced, and corrosive media such as seawater and oxygen are prevented from being in contact with a metal surface, so that the occurrence of corrosion is slowed down or prevented.

The application discloses a kind of integrated circuit chip package lead frame's electroless gold plating solution and its gold plating method, it is related to integrated circuit chip packaging field.Therein, electroless gold plating solution is following concentration component aqueous solution: water-soluble gold compound, with Au, concentration is 1-1.5g / L;Sodium hypophosphite 10~20g / L;Malic acid 15~20g / L;Citric acid 15~20g / L;N,N'-bis (2-hydroxyethyl) ethylenediamine 10~15g / L;Triammonium citrate 15~20g / L;EDTA-2Na 5~10g / L;5,5'-dimethyl hydantoin 5~10g / L;Metal ion catalyst, with metal ion, concentration is 2~3ppm;Mercaptoimidazole 0.01~0.015g / L;Hexamethylenetetramine 5~10g / L.The electroless gold plating solution in the application can consider stability, high deposition rate and plating layer deposition uniformity.

The invention discloses a method for preparing 2, 3, 5, 6-pyridine tetramine from liquid ammonia, and belongs to the field of organic chemical synthesis. According to the method, liquid ammonia or ammonia water is used as an amination reagent, and the amination reagent and a raw material 2, 3, 5, 6-tetrachloropyridine are subjected to a high-pressure temperature-control nucleophilic substitution reaction in an inert solvent, a protective gas atmosphere and under the action of a catalyst to prepare a target product. The prepared 2, 3, 5, 6-pyridine tetramine is stable in structure and reliable in performance, can be directly applied to the fields of organic synthesis intermediates, functional material preparation, drug molecule precursors and the like, provides a new path for efficient and green preparation of the compounds, and has remarkable practical value and popularization prospects.

The invention provides a bionic multilevel structure super-hydrophobic coating as well as a preparation method and application thereof. The bionic multilevel structure super-hydrophobic coating comprises a submillimeter layer, a micron layer and a nano layer, wherein the submillimeter layer is a substrate made of high-temperature laminated resin; the micron layer is a bulge made of high-temperature laminated resin; the raw materials of the nano layer comprise a substrate coating and a functional coating; wherein the substrate coating is prepared from epoxy resin (E-51), polydimethylsiloxane (PDMS), ethyl acetate, triethylene tetramine and a curing agent; the functional coating is prepared from the following raw materials: hydrophobic modified TiO2 nanoparticles, PDMS (Polydimethylsiloxane) and ethyl acetate. According to the bionic multilevel structure super-hydrophobic coating, the preparation method and the application, anisotropic liquid drop control performance (forward / reverse direction sliding angle difference), an adjustable liquid drop bouncing behavior and efficient resistance reduction (gt; 66%) at a high shear rate (such as 200s <-1 >) are achieved.

The invention relates to the technical field of epoxy resin curing agents and functional epoxy resin, and discloses a phosphorus-containing phenolic multifunctional curing agent, a preparation method of the phosphorus-containing phenolic multifunctional curing agent and heat-resistant flame-retardant epoxy resin of the phosphorus-containing phenolic multifunctional curing agent. The preparation method comprises the following steps: preparing modified phenolic aldehyde amine by taking a DOPO type phenol monomer containing a flexible ether chain, phenol, paraformaldehyde and triethylene tetramine as raw materials; based on an amino-chlorine nucleophilic substitution reaction mechanism, modified phenolic aldehyde amine and chloropropyl heptaisobutyl POSS are subjected to reactive compounding to obtain the phosphorus-containing phenolic aldehyde multifunctional curing agent, and the curing agent is used for carrying out curing reaction on epoxy resin to obtain the phosphorus-containing phenolic aldehyde multifunctional curing agent. The epoxy resin cured product prepared by the method has high heat resistance, excellent toughness balance and efficient phosphorus-silicon-nitrogen synergistic intrinsic flame retardant property.

The application belongs to the field of oil field chemicals, and particularly relates to a self-emulsifying resin curing agent, a curing system and a preparation method thereof. The preparation method of the self-emulsifying epoxy curing agent comprises the following steps: (1) mixing an epoxy resin E-44 solution with triethylenetetramine, and reacting to obtain a modified epoxy resin; (2) adding 2,3-epoxypropyltrimethylammonium chloride into the modified epoxy resin, and reacting to obtain the self-emulsifying epoxy curing agent. The self-emulsifying curing agent has high adaptability, small addition amount and simple on-site construction process. The self-emulsifying resin curing system for resin cement has significantly improved toughness and corrosion resistance.

The invention relates to the technical field of self-repairing coatings, in particular to a self-repairing silicon-based water-based coating and a preparation method thereof. The self-repairing silicon-based water-based paint is prepared from the following raw materials in parts by mass: 5 to 15 parts of water-based fluorine-containing hydroxyl acrylic emulsion, 10 to 20 parts of water-based epoxy resin emulsion, 5 to 15 parts of hydroxyl-terminated polydimethylsiloxane, 1 to 5 parts of activated graphene oxide, 1 to 5 parts of micro-nano silicon dioxide, 1 to 2 parts of catalyst, 5 to 10 parts of methoxytrimethylsilane and 1 to 4 parts of diamino type silane coupling agent. 0.5 to 1.5 parts of amino-terminated polyamidoamine, 10 to 20 parts of aliphatic modified isocyanate curing agent and 0.5 to 1 part of triethylene tetramine. After the coating is damaged, rapid self-healing can be achieved, the coating has good self-repairing performance, and the preparation method is simple and suitable for large-scale application and popularization.

The invention discloses a high-temperature-resistant salt-resistant inhibition type coating agent as well as a preparation method and application thereof, and belongs to the technical field of petroleum and natural gas drilling. Comprising the following components in parts by weight: 250 to 480 parts of water, 130 to 270 parts of methacrylic acid, 25 to 50 parts of sulfuric acid, 60 to 120 parts of polyethylene glycol, 80 to 150 parts of triethylene tetramine, 20 to 30 parts of sodium p-styrenesulfonate, 120 to 210 parts of acrylamide, 170 to 280 parts of 2-acrylamido-2-methanesulfonic acid, 18 to 53 parts of sodium hydroxide, 3 to 15 parts of azodiisobutyronitrile and 7 to 18 parts of persulfate. The high-temperature-resistant and salt-resistant inhibition type coating agent disclosed by the invention is relatively excellent in dissolving property, has a good coating capability on drilling cuttings in a high-temperature and high-salt environment, is helpful for cooperating with sodium bentonite to form a compact mud cake, plays a good role in coating clay, and is helpful for improving borehole cleanliness.

The present invention describes a new crystalline form of triethylenetetramine tetrachloride which has improved room temperature stability over known forms and over the dichloride salt. The new crystalline form is characterised by having peaks in an XRPD spectrum at 22.9, 25.4, 25.8, 26.6, 34.6 and 35.3±0.1° 2θ and Raman shifts 943, 1173, 1527 and 1612±5 cm−1. The crystalline form of triethylenetetramine tetrachloride is useful in the treatment of Wilson's disease.

The application discloses an additive for a stainless steel polishing liquid and a polishing method, and belongs to the technical field of stainless steel polishing liquids, and particularly relates to a stainless steel polishing process for electronic components. The additive for the stainless steel polishing liquid comprises 40-60 grams / liter of hexamethylenetetramine, 130-160 grams / liter of polyethylene glycol, 40-60 grams / liter of dimethyl silicone oil, 40-60 grams / liter of sodium dodecyl diphenyl ether disulfonate, and the rest is water. When used, the surface treatment additive is added into the polishing liquid containing nitric acid to prepare the polishing liquid containing the surface treatment additive, the adding amount of the surface treatment additive in the polishing liquid is 15-20 ML / L, the prepared additive is added into the polishing liquid according to the proportion, the polishing liquid is heated to 90-110 DEG C, the stainless steel pressure sensor base is put into the polishing liquid for polishing for 10-25 seconds, and thus the glossy metal surface can be obtained, and the damage to the glass part on the stainless steel pressure sensor base in the polishing process can be avoided.

A kind of method for testing the content of alumina in ilmenite sand, comprising the following steps in sequence: (1) adding sodium hydroxide, ilmenite sand sample into nickel crucible, cooling after sample fusion; (2) adding distilled water to leach the fused block, then adding ethanol to obtain leaching solution; then diluting the leaching solution with water, filtering to obtain filtrate; (3) transferring the filtrate into a triangular flask, then adding EDTA solution, adding potassium sodium tartrate solution, shaking uniformly; boiling, cooling; (4) adding hexamethylenetetramine solution into the triangular flask, then adding dimethyl phenol orange indicator; adding 1+1 hydrochloric acid solution, adjusting to yellow solution, excess 2-3 drops; adding zinc acetate standard solution, until the solution is purple red, not reading; (5) adding sodium fluoride, boiling after cooling; adjusting according to the color of solution, then titrating with zinc acetate standard solution. The present application can accurately measure the content of alumina in ilmenite sand, and the operation is relatively simple, fast, and the test cost is relatively low.

A preparation method of a long-acting tracer is disclosed: a water-soluble rare earth salt is added to a nano-silicon dioxide dispersion liquid; triethylene tetramine and hexyl hydroxamic acid are added dropwise, and stirring reaction is carried out; the solvent is removed, and drying is carried out to obtain a product. In addition, the long-acting tracer and the application thereof are also disclosed. The long-acting tracer product is non-toxic, harmless and non-radiation, has high detection precision, does not react with reservoir fluid, has simple injection construction, and has better long-term release performance.

The invention relates to the technical field of polymer nano-composite coatings, and particularly discloses a galvanic corrosion resistant nano-composite coating material and a preparation method thereof. The invention relates to an anti-galvanic corrosion nano-composite coating material, which comprises a component A and a component B which are independently stored and are mixed during use, the component A is prepared from the following raw materials in parts by weight: 10-20 parts of epoxy resin type A, 5-15 parts of epoxy resin type F, 55-80 parts of p-chlorobenzotrifluoride, 1-3 parts of hexagonal boron nitride, 2-5 parts of nano silicon dioxide and 1-5 parts of inorganic toner; the component B is prepared from the following raw materials in parts by weight: 40-60 parts of phenolic aldehyde amine; 30 to 40 parts of triethylene tetramine; 5 to 10 parts of N-aminoethyl piperazine; the hexagonal boron nitride and the nano silicon dioxide are pretreated before being used. The anti-galvanic corrosion nano-composite coating material provided by the invention can significantly improve the shielding property and electrochemical stability of an ultrathin coating, and realizes the protection effects of high impedance, low corrosion current and long-term stability.

The invention relates to the technical field of pipeline repair, and discloses a pipeline trenchless repair material and a preparation method thereof, the repair material is a bi-component solvent-free thixotropic fluid, and is composed of a component A and a component B, wherein the component A takes bisphenol A type and bisphenol F type liquid epoxy resin as a matrix, and is matched with hydrophilic fumed silica and quartz powder to construct a thixotropic network; the component B comprises a reaction product of tall oil fatty acid and triethylene tetramine, benzyl alcohol, an alicyclic amine curing agent, an aromatic amine curing agent and a tertiary amine accelerator. Through compounding of an amine curing system and thixotropic adjustment, the problems that an existing material is prone to sagging during construction on a vertical plane and the bonding strength of a wet base plane is low are effectively solved. The material has excellent thixotropy, wet surface bonding strength and chemical corrosion resistance, is compact in curing, low in shrinkage rate and free of solvent residues, and is particularly suitable for non-excavation in-situ repair construction of underground drainage pipelines.

The application discloses a kind of covalent organic framework materials for photocatalytic cracking of water vapor and preparation method thereof, belong to covalent organic framework field.The material with pyrene-based tetramine derivative and a series of nonlinear dialdehyde derivatives with hydrophilic site as raw material, dioxane and mesitylene as solvent, acetic acid as catalyst, solvent hot reaction for several days.After reaction, in turn with DMF, THF extraction washing, soxhlet extraction 24 hours vacuum drying target product.The synthesized covalent organic framework has ultra-small microporous structure, rich water absorption site and conjugated pyrene-based light absorption unit, which gives the material fast air water collection capacity and excellent photocatalytic activity, and covalent organic framework is applied to photocatalytic cracking of water vapor for the first time.