30 results about "Hexylamine" patented technology

The invention discloses a flame-retardant polyurethane composite material and a preparation process thereof, and relates to the field of high polymer materials. When the flame-retardant polyurethane composite material is prepared, tetramethyl tetravinyl cyclotetrasiloxane reacts with DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) to obtain phosphorus modified cyclotetrasiloxane; then, lignin sequentially reacts with 3-aminopropyldimethoxymethylsilane and phosphorus modified cyclotetrasiloxane, and modified lignin microspheres are obtained; the preparation method comprises the following steps: reacting 2, 4-pentanedione, 1, 5-dichloro and hydroxylamine hydrochloride to obtain a dioxime monomer; and uniformly mixing isophorone diisocyanate, 1, 4-butanediol, a dioxime monomer, N, N-dimethyl hexylamine, the modified lignin microspheres and deionized water, pouring into a mold, and curing to obtain the flame-retardant polyurethane composite material. The flame-retardant polyurethane composite material prepared by the preparation method disclosed by the invention has excellent antibacterial property, flame retardance and self-repairing property.

The invention discloses a degradable and recoverable epoxy Vitrimer as well as a preparation method and application thereof, and belongs to the technical field of functional materials and preparation thereof. The problems that existing epoxy resin is not melted and unrecyclable, and the mechanical property and breakdown field strength are seriously reduced after recycling are solved. According to the invention, 2-AFD is used as a curing agent of DGEBA, and a dynamic disulfide bond is introduced in the curing process of DGEBA, so that the epoxy resin is endowed with degradable and recoverable properties. DGEBA is used as a raw material, and vanillin-based epoxy resin (VOEP) with a reversible dynamic covalent bond (-C = N-) is further used for replacing a part of DGEBA, so that the epoxy resin realizes high-performance retention rate hot-pressing recovery, and meanwhile, the epoxy resin can be degraded in a mercaptan solution and can also be degraded in an n-hexylamine solution.

The present application relates to the technical field of robot protection and polymer injection molding, in particular to an anti-skid and anti-seepage injection glove for bionic robots and a preparation method thereof. The glove is based on an inner container, which is formed by zoned weaving of nylon 66 filaments and spandex elastic fibers to form a circular arc fingertip section, a density gradient transition zone and a knuckle section. After surface activation and polyacrylic acid grafting, the knuckle section and the density gradient transition zone are subjected to axial zoned grafting with dodecylamine, and then global supplementary grafting is performed with hexylamine to obtain a hydrophobic modified glove inner container. After heat setting, a continuous injection molding plastic layer is formed on the outer surface of the glove. The present application is conducive to reducing the inner container slip and plastic seepage during injection molding, and also takes into account the fingertip cushioning and the stability of the injection molding layer combination, and is suitable for the protection and coating of multi-finger and multi-joint bionic robot dexterous hands.

The invention discloses an oil exploitation aid and a preparation method thereof, and relates to the technical field of oil exploitation aids. The oil exploitation aid comprises the following raw materials in parts by weight: 30-40 parts of a modified carboxylate surfactant, 15-20 parts of a nonionic surfactant, 5-6 parts of a cosolvent, 4-6 parts of a stabilizer, 3-5 parts of an anti-scaling agent and 140-160 parts of deionized water. The preparation method comprises the following steps: firstly, carrying out a ring-opening acylation reaction by taking n-hexylamine, 1, 8-naphthalic anhydride and 12-bromo-1-dodecene as raw materials, carrying out an alkylation reaction to obtain 1-(dodecyl-11-ene-1-yl (amyl) carbamoyl)-2-sodium naphthoate, then carrying out a reaction with a first-generation polymer prepared from urotropine and p-aminophenol, and carrying out a reaction to obtain the 1-(dodecyl-11-ene-1-yl (amyl) carbamoyl)-2-sodium naphthoate. Finally, the modified carboxylate type surfactant is obtained. The oil exploitation auxiliary agent prepared by the invention has the effects of changing the wettability of a rock core and preventing swelling of clay, and the recovery rate of oil displacement of a low-permeability reservoir is improved.

The invention discloses a magnetic supported molybdenum-based catalyst as well as a preparation method and application thereof, and belongs to the field of organic synthesis catalysis. The preparation method comprises the following steps: taking FeCl3 and ZrOCl2. 8H2O as metal precursors, and preparing a ZrO2-Fe2O3 carrier by adopting a coprecipitation method; ammonium molybdate tetrahydrate is used as a precursor of molybdenum, molybdenum metal is loaded on the ZrO2-Fe2O3 carrier through an impregnation method, and the magnetic loaded molybdenum-based catalyst is prepared. The method for catalyzing carboxylic acid and amine to prepare amide is suitable for a continuous flow reactor and a traditional batch-type reaction device. In a continuous flow reactor, the catalyst does not need to be frequently separated in the reaction process, and the catalyst still keeps high activity after long-time operation. After phenylpropionic acid and n-hexylamine are catalyzed to react for 100 hours in a continuous flow reactor, more than 3 g of product can be generated, and excellent catalytic stability and cycle performance are shown while high yield is kept.

The present invention relates to a <110>-oriented low-dimensional perovskite thin film and a method for preparing a solar cell thereof, belonging to the field of optoelectronic materials and devices. In this invention, a specific organic diamine salt (2,2-hexanedioxy-bis-hexylamine iodide, EDBEI2), chloromethylamine, and lead iodide are dissolved in a methylammonium acetate solution according to different stoichiometric ratios to prepare a perovskite precursor solution. Then, the solution is spin-coated onto an ITO substrate deposited with PEDOT:PSS by a heating spin-coating method, and annealed to form a dense, uniform, and highly stable low-dimensional perovskite thin film. The whole process is completely operated in air. Then, a PCBM electron transport layer is spin-coated on the thin film, and a modified layer LiF and a metal Al electrode are deposited by vacuum evaporation technology to complete the preparation of the device.

This invention discloses a synthetic chiral N -benzoyl- N The method for synthesizing dihexylamino-thio-phenyl sulfoxide imine belongs to the field of organic synthesis. Starting with sodium benzenesulfinate, a key intermediate, chlorosulfoxide imine, is obtained through a multi-step reaction. Then, the following steps are employed: A) an asymmetric chloro-fluorine exchange reaction at a hexavalent sulfur center yields an optically active fluorinated sulfoxide imine, which undergoes a nucleophilic substitution reaction with di-n-hexylamine to give the R-type product; B) using a bifunctional small organic molecule catalyst, 4-arylpyridine N-oxygenate, as the catalytic system, a nucleophilic substitution reaction is carried out with di-n-hexylamine to asymmetricly synthesize the S-type product. This method is characterized by mild conditions, simple steps, high overall yield, and chiral product. N -benzoyl- N Dihexylamino-thiophenyl sulfoxide imine exhibits micromolar levels of biological activity in human lung cancer cells.

The present invention discloses an oil production aid and a preparation method thereof, relating to the technical field of oil production aids. The oil production aid comprises the following raw materials in parts by weight: 30-40 parts of a modified carboxylate surfactant, 15-20 parts of a non-ionic surfactant, 5-6 parts of a co-solvent, 4-6 parts of a stabilizer, 3-5 parts of a scale inhibitor, and 140-160 parts of deionized water; first, 1-(dodec-11-en-1-yl(pentyl)carbamoyl)-2-naphthoic acid sodium is obtained by a ring-opening acylation reaction and an alkylation reaction using n-hexylamine, 1,8-naphthalic anhydride, and 12-bromo-1-dodecene as raw materials, and then it reacts with a first-generation polymer prepared from hexamine and p-aminophenol to finally obtain the modified carboxylate surfactant. The oil production aid prepared by the present invention has the effects of changing the wettability of the core and preventing clay swelling, and improves the oil recovery rate of low-permeability oil reservoirs.

The invention provides a long-acting injection preparation based on an alpha-lipoic acid derivative and a preparation method and application thereof, and the preparation method of the long-acting injection preparation comprises the following steps: taking alpha-lipoic acid as a carboxylic acid donor and n-hexylamine as a primary amine donor, and carrying out reaction in a system of EDC and NHS to generate N-hexyl lipoic amide; n-hexyl lipoic amide and alpha-lipoic acid are dissolved in dimethyl sulfoxide according to the mass ratio of 1: 1 for a reaction, and the long-acting injection preparation is obtained. The long-acting injection preparation can realize in-situ phase change and drug long-acting slow release through solvent diffusion response, has good injectability and biocompatibility, can be used as a drug delivery carrier, and is used for long-term treatment of chronic metabolic diseases.

This invention discloses an α-n-hexylaminododecanoic acid, its preparation method, and its applications, belonging to the field of mineral flotation and separation technology. This invention synthesizes α-n-hexylaminododecanoic acid using α-bromododecanoic acid and n-hexylamine as raw materials through a simple method. The synthesized α-n-hexylaminododecanoic acid can be used as an amphoteric collector for the flotation of spodumene ore. As an amphoteric collector, α-n-hexylaminododecanoic acid has advantages such as low reagent dosage, good selectivity, excellent foaming performance, and strong collecting ability. The α-n-hexylaminododecanoic acid synthesized in this invention can be directly used as an amphoteric collector for the flotation of raw ore. The process is simple, has a wide range of applications, and low operating costs, which helps to improve the economic efficiency of beneficiation plants.

The present invention relates to a carbonized polymer molecular cluster-stabilized foam system, a preparation method, and applications thereof. The carbonized polymer molecular clusters are prepared by dispersing citric acid, taurine, and hexylamine in an alcohol solvent and subjecting them to a hydrothermal reaction. The carbonized polymer molecular cluster-stabilized foam system comprises the following components, measured by weight: 0.03 to 0.1 parts of carbonized polymer molecular clusters, 0.5 to 0.8 parts of an amphoteric surfactant, and 50 to 100 parts of water. The stable foam system provided by the present invention comprises carbonized polymer molecular clusters, which have excellent salt tolerance. The foam system not only improves foam stability and reduces the risk of formation damage, but also effectively enhances the environmental friendliness of the system by optimizing the selection of raw materials.

Salts of hexylamine, for example, hexylamine succinate and tri-hexylamine citrate and their method of production are described. The disclosure also relates to compositions comprising hexyalmine, for example, for reducing appetite in a human subject, treating obesity in a human subject, preventing obesity in a human subject, preventing weight gain in a human subject, increasing fat loss in a human subject, treating an overweight human subject, increasing athletic performance in a human subject, increasing endurance in a human subject, increasing muscle strength in a human subject, improving cognitive function in a human subject, treating ADHD in a human subject, increasing sweating in a human subject, reducing reaction time of a human subject, increasing psychomotor vigilance of a human subject, enhancing memory in a human subject, increasing central nervous system activity in a human subject, and enhancing alertness, attention, concentration, and / or memory in a human subject.

The invention discloses low-temperature copper paste capable of being sintered in an atmospheric environment. The low-temperature copper paste comprises the following raw materials in percentage by mass: 20-40% of nano copper powder, 20-50% of micron copper wires, 1-10% of flaky copper powder, 0.15-3% of a binder, 10-30% of a solvent and 6.45-17% of a dispersing agent. The dispersing agent is selected from one of n-hexylamine, N, N-dimethyl decylamine, 3-aminopropanamide, a silane coupling agent and N, N-diisopropyl methylamine. The use of the reducing agent and the additive is reduced, the functions of the reducing agent and the additive are achieved at the same time through the dispersing agent material, the use of the dispersing agent reduces the necessary components for preparing the copper paste, the process is simplified, and the cost is further reduced.

The invention belongs to the technical field of printing electronics, and relates to conductive copper paste and a laser sintering process thereof. The conductive copper paste contains micron-sized copper powder, a copper ligand and a solvent, the copper ligand is formed by coordination of anhydrous copper formate and an amino ligand; and the amino ligand is more than one of hexylamine, 2-ethyl hexylamine, butylamine, beta-alanine, glycine, 2-amino-2-methyl-1-propanol, octylamine and oleylamine. The laser sintering process comprises the following steps: printing conductive copper paste on the surface of a substrate, sintering by adopting a picosecond or femtosecond pulse laser system in the atmosphere of air, nitrogen, inert gas or reducing gas, and performing multi-path scanning on the surface of a sample by controlling a laser scanning program through software in the sintering process. The problems that in the prior art, atmosphere control equipment needs to be additionally arranged, the production cost is increased, and the process openness and large-scale continuous production are limited by the closed atmosphere are solved.

The invention belongs to the field of chemical engineering, and relates to a production method for preparing n-hexylamine by using a high-performance catalyst with Al2O3 as a carrier. The invention provides a supported catalyst. The supported catalyst is composed of a catalyst carrier and cobalt, copper, zinc and molybdenum which serve as active components. The invention also provides a method for preparing n-hexylamine by taking n-hexanol as a raw material, and n-hexanol, liquid ammonia and hydrogen are subjected to amination reaction on a catalyst bed layer by using the supported catalyst. The preparation method of the n-hexylamine is free of an external hydrogen source and depends on hydrogen transfer in the catalyst; all atoms in reactants enter a product or byproduct water, and the atom utilization rate is close to 100%; the byproduct is only water, toxic waste is avoided, and the method has the characteristics of clean and environment-friendly process and the like.

The invention belongs to the technical field of temporary plugging agents, and particularly relates to a polymer gel temporary plugging agent and a preparation method and application thereof. The polymer gel temporary plugging agent provided by the invention is a novel temporary plugging agent taking a ternary comb polymer of sodium p-styrenesulfonate, alpha-olefin and 2-(6-isocyanate hexylamine amide)-6-methyl-4-[h]-pyrimidone as a main agent. The temporary plugging agent has the advantages of good thermal stability and water solubility, strong tensile strength and viscosity capacity, excellent temporary plugging performance and high recovery rate after washing, and has the advantages of obvious fracture growth effect and low formation damage.

The invention belongs to the technical field of composite material preparation, and relates to a preparation method of a sulfur vacancy-containing copper-doped cobaltosic sulfide / nitrogen-doped graphene quantum dot / reduced graphene oxide composite material, which comprises the following steps: ultrasonically dispersing nitrogen-doped graphene quantum dots and graphite oxide in n-hexylamine; mixing the obtained solution with cobalt diethylaminodithioformate and copper diethylaminodithioformate, performing ultrasonic dispersion, transferring into a reaction kettle, performing solvothermal reaction at 170-190 DEG C for 8-12 hours, performing centrifugal separation, washing and drying on the precipitate, adding the obtained powder into a mixed solution of distilled water and oxalaldehyde, uniformly stirring, transferring into the reaction kettle, performing solvothermal reaction at 100-120 DEG C for 4-6 hours, and drying to obtain the cobalt diethylaminodithiocarbamate / copper diethylaminodithiocarbamate / copper diethylaminodithiocarbamate / copper diethylaminodithiocarbamate composite material. And carrying out centrifugal separation, washing and drying on the obtained precipitate to obtain the product. The preparation method is simple and feasible to operate, easy to implement industrially and good in compounding effect, multiple components in the composite material have a synergistic effect, the electrochemical performance can be improved, and the composite material is expected to be applied to a negative electrode of a hybrid supercapacitor.

The invention discloses a method for preparing high-quality Ag2Se colloidal quantum dot (CQDs) ink and film, comprising the following steps: S1, mixing an Ag2Se CQDs solution with a ligand solution, shaking, and then centrifuging to obtain an Ag2Se CQDs substrate at the bottom of a centrifuge tube, wherein the ligand solution is a mixed solution of silver iodide, potassium iodide, and N,N-dimethylformamide; S2, adding n-octane to the Ag2Se CQDs substrate, shaking for 30 seconds, and then washing the substrate; S3, adding n-butylamine, n-hexylamine solution, and ligand solution to the Ag2Se CQDs substrate after washing several times, standing for 2 minutes, and then shaking for 1 minute, adding ethyl acetate, and centrifuging to obtain the Ag2Se CQDs substrate at the bottom of the centrifuge tube; S4, adding a mixed solution of N,N-dimethylformamide, dimethyl sulfoxide, n-butylamine, β-phenylethylamine, and n-hexylamine to the Ag2Se CQDs substrate, shaking, and then centrifuging to obtain the final Ag2Se The present invention realizes the preparation of liquid phase Ag2Se CQDs ink for the first time through the steps of preparing CQDs substrate, the preparation method is simple and effective, and the prepared Ag2Se CQDs film is smooth and uniform with low roughness.

This invention belongs to the field of printed electronics technology and relates to a conductive copper paste and its laser sintering process. The conductive copper paste contains micron-sized copper powder, copper ligands, and a solvent; the copper ligands are formed by the coordination of anhydrous copper formate with amino ligands; the amino ligands are one or more selected from hexylamine, 2-ethylhexylamine, butylamine, β-alanine, glycine, 2-amino-2-methyl-1-propanol, octylamine, and oleylamine. The laser sintering process involves printing the conductive copper paste onto the surface of a substrate, then sintering it using a picosecond or femtosecond pulsed laser system under an atmosphere of air, nitrogen, inert gas, or reducing gas. During sintering, the laser scanning program is controlled by software to perform multi-path scanning of the sample surface. This invention solves the problems of existing technologies that require additional atmosphere control equipment, increase production costs, and that a closed atmosphere limits process openness and large-scale continuous production.

The present invention provides carvacrol quaternary ammonium salt derivatives, their synthesis methods, and their use as antibacterial agents, belonging to the field of pharmaceutical chemistry technology. The structure of the carvacrol quaternary ammonium salt derivatives of the present invention is shown in Formula (I), where n is the number of carbon atoms between the oxygen and nitrogen atoms, and is 3, 4, or 5; and R is selected from n-propylamine, n-butylamine, n-pentylamine, n-hexylamine, dipropylamine, dibutylamine, diisopropylamine, diisobutylamine, morpholine, or thiomorpholinyl. This series of carvacrol quaternary ammonium salt derivatives exhibits excellent antibacterial activity and can be used as a potential antibacterial agent. #imgabs0#

The present invention provides a non-aqueous electrolyte and a lithium ion battery thereof, the non-aqueous electrolyte comprising a lithium salt, a non-aqueous organic solvent and an additive, the additive comprising an unsaturated ionic liquid salt shown in structural formula I, wherein R1, R2, and R3 each independently represent H, a halogen, a hydrocarbon group having 1-6 carbon atoms, an alkenyl group having 1-6 carbon atoms, an alkynyl group, a phenyl group, a benzyl group, a biphenyl group or hexylamine. The unsaturated ionic liquid salt of the present invention contains a sulfur-oxygen double bond and a carbon-carbon double bond. During the battery cell formation stage, the sulfur-containing unsaturated bond forms an inorganic substance and a carbon-carbon double bond to form a polymer. These effective components can stably improve the interface composition of the battery cell during high-temperature storage and circulation, suppress the damage of harmful components to the electrolyte, thereby significantly improving the high-temperature storage and cycle performance of the battery, and can improve the high-temperature storage performance and high-temperature cycle performance of the high-voltage ternary lithium ion battery.

The invention relates to the technical field of drug synthesis, in particular to a PSMA-targeted polyester-docetaxel nano-coupling drug as well as a preparation method and application of the PSMA-targeted polyester-docetaxel nano-coupling drug. Comprising the following steps: mixing dimercapto polyethylene glycol, a diacrylate monomer, n-hexylamine and tetrahydrofuran to obtain PET-STrt; the preparation method comprises the following steps: mixing PET-STrt, trifluoroacetic acid, triethyl silane and dichloromethane to react, so as to obtain PET-SH; the preparation method comprises the following steps: mixing PET-SH, maleimide modified (S)-2-(3-((S)-amino-1-tert-butoxy-1-oxohexane-2-yl) ureido) glutaric acid and N, N-dimethylformamide, and carrying out a reaction so as to obtain PET-DCL-SH; the preparation method comprises the following steps: mixing PET-DCL-SH, pyridyldisulfide modified docetaxel and N, N-dimethylformamide to react, so as to obtain the polyester-docetaxel nano conjugate, and the polyester-docetaxel nano conjugate has good water solubility and high drug loading capacity.

The invention discloses nonanediamine furandicarboxylate and a crystal thereof. The nonanediamine furandicarboxylate comprises pentamethylene diamine furandicarboxylate (PA5F salt), hexamethylene diamine furandicarboxylate (PA6F salt), heptyl diamine furandicarboxylate (PA7F salt), octane diamine furandicarboxylate (PA8F salt), nonanediamine furandicarboxylate (PA9F salt), decamethylene diamine furandicarboxylate (PA10F salt) and a crystal thereof. According to the crystal provided by a specific method, the odor of aliphatic diamine is eliminated, the crystal is convenient to transport due to higher stacking density, the stability of a polymerization monomer is improved, the requirement of nylon polymerization on a molar ratio is met, and the crystal can be directly used for polymerization.

The application relates to the field of hexanediamine purification and discloses a molecular imprinting material with monamine adsorption function, a preparation method and application, which comprises the following steps: in the presence of a first dispersing agent, a monamine, an initiator and an optional carrier, a functional monomer is subjected to a polymerization reaction, and then a monamine removal operation is performed. The molecular imprinting material prepared by the application has good selective adsorption effects on hexylamine and cyclohexylideneimine, the adsorption material can be rapidly collected under an external magnetic field, and the effects of rapidly removing hexylamine and cyclohexylideneimine in a hexanediamine product are achieved.

The invention relates to the technical field of quantum dot reflecting films, and discloses a preparation method of a quantum dot reflecting film and a reflecting film, and the preparation method comprises the following steps: (1) carrying out organic ligand modification on CsPbBr3 quantum dots through bromohexylamine to obtain modified quantum dot powder; (2) adding nylon 6 resin, the modified quantum dot powder and ethanol into a reaction kettle, sealing, heating, stopping heating, stirring, cooling to room temperature, and separating to obtain PA6-coated quantum dots; and (3) the PA6 wrapped quantum dots and PET are blended and granulated, the obtained granulated material and PET are blended and then added into an auxiliary extruder, the foaming material, titanium dioxide and PET are added into a main extruder, melt extrusion is performed, the reflecting film of an ABA three-layer structure is obtained, and the A layer contains the quantum dots. The quantum dots are wrapped with nylon 6 resin, the service life of the quantum dots is prolonged, the temperature resistance of the quantum dots is improved, the brightness and color gamut of the obtained reflecting film are high, and durability is improved.

Salts of hexylamine, for example, hexylamine succinate and tri-hexylamine citrate and their method of production are described. The disclosure also relates to compositions comprising hexylamine, for example, for reducing appetite in a human subject, treating obesity in a human subject, preventing obesity in a human subject, preventing weight gain in a human subject, increasing fat loss in a human subject, treating an overweight human subject, increasing athletic performance in a human subject, increasing endurance in a human subject, increasing muscle strength in a human subject, improving cognitive function in a human subject, treating ADHD in a human subject, increasing sweating in a human subject, reducing reaction time of a human subject, increasing psychomotor vigilance of a human subject, enhancing memory in a human subject, increasing central nervous system activity in a human subject, and enhancing alertness, attention, concentration, and / or memory in a human subject.

The application discloses a plasticizing type antioxidant for polyamide, and has the following structure: the antioxidant is prepared by reacting 5-(3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionamide) isophthaloyl chloride with n-hexylamine or hexanediamine, the method is simple, the antioxidant has good antioxidation effect when added into the polyamide, and meanwhile, the plasticity of the polyamide can be increased.

A material that can be used in a wide temperature range is provided. A graphene compound includes graphene or graphene oxide and a substituted or unsubstituted chain group, the chain group includes two or more ether bonds, and the chain group is bonded to the above graphene or graphene oxide through a Si atom. Alternatively, a method for forming a graphene compound includes a first step and a second step after the first step. In the first step, graphene oxide and a base are stirred under a nitrogen stream. In the second step, the mixture is cooled to room temperature, a silylating agent that has a group having two or more ether bonds is introduced into the mixture, and the obtained mixture is stirred. The base is butylamine, pentylamine, hexylamine, diethylamine, dipropylamine, dibutylamine, triethylamine, tripropylamine, or pyridine.

The invention relates to the technical field of colloidal quantum dot ink and film manufacturing. In particular to a preparation method of PbS quantum dot ink with exciton peak wavelength of 2.0 microns and a film. The PbS quantum dot ink is prepared by dissolving PbS quantum dot powder in a mixed solution of N, N-dimethylformamide, n-butylamine, n-hexylamine and pyridine; and carrying out spin coating on the PbS quantum dot ink and then depositing to form a thin film. According to the method, pyridine is added into an organic solvent, so that the problem of poor solubility of 2.0-micron PbS CQDs in a traditional liquid-phase ligand exchange method is solved; and the prepared PbS quantum dot film is flat, uniform and low in roughness.

The invention discloses an amphoteric collecting agent and application thereof in spodumene flotation separation, and belongs to the technical field of spodumene flotation separation. The amphoteric collecting agent is alpha-di-n-hexylamino-lauric acid, the alpha-di-n-hexylamino-lauric acid serving as the amphoteric collecting agent has the advantages of being high in selectivity, good in foaming performance, good in low-temperature resistance and the like when used for spodumene flotation, and good flotation indexes can be obtained in the low-temperature environment of 10 DEG C. The amphoteric collecting agent can form chemical action with spodumene, can stably form single-layer adsorption on the surface of the spodumene, effectively improves the hydrophobicity of the surface of the spodumene, and can form multi-layer reverse adsorption with gangue minerals such as feldspar and quartz, so that the surfaces of the gangue minerals still have high hydrophilicity, and the purpose of separation is achieved.