77results about How to "Suitable for industrial operation" patented technology

The invention discloses an extraction preparation method of lycopene, belonging to the technical field of food engineering. The method uses tomatoes or watermelon flesh as raw materials and adopts the technology of ultrasonic and extraction bags, which comprises the following steps: (1) the treatment of the raw materials and beating; (2) the separation of solid puree and liquid puree of fruit puree; (3) the ethanol water treatment of jam;(4) the extraction of the lycopene extractant of the jam and (5) the preparation of crystallization products of the lycopene. The extraction time of the invention is reduced to 10 to 60min from the10 to 20h of conventional time, and moreover the purity content of products is obviously improved from 10 to 20 percent in general to 70 to 80 percent. Therefore, the extraction preparation method is characterized by being efficient and fast, being convenient to be operated, low cost, high content of lycopene in the products, etc and is suitable for the promotion and the application in the industrialized and large scale production enterprises of natural lycopene with high purity.

The invention discloses a zinc coordination polymer as well as a preparation method and application thereof. According to the method, under a solvothermal condition, a zinc complex is prepared firstly, and then is doped with a small amount of cobalt ions, so that a doped complex is obtained. Compared with conventional method, the method disclosed by the invention has the advantages that a zinc complex catalyst doped with the small amount of cobalt ions is better in the reaction effect of catalyzing and light-degrading Rhodamine B, can realize recycling, and keep relatively high catalytic efficiency.

The invention discloses a BiOI / N doped graphene composite photocatalyst and a preparation method thereof. The method mainly comprises the following steps: 1) preparing a graphene oxide colloidal suspension mixing with urea by stirring, drying, conducting high vacuum thermal reduction to obtain N doped graphene; 2) conducting ultrasonic dispersion on the N doped graphene in the glycol solution of potassium iodide, and stirring and mixing without bismuth nitrate hydrate glycol solution; and 3) transferring the above mixed solution into an autoclave with teflon liner, conducting hydrothermal reaction to obtain a solid product; and conducting repeated centrifugation, washing and drying on the solid product. The BiOI / N doped graphene composite photocatalyst prepared by the invention comprises bismuth oxyiodide in flower-like particles and nitrogen doped graphene coated with the bismuth oxyiodide particles, and forms a p-n heterojunction on the interface. The catalyst prepared by the invention has excellent performance in the field of photocatalytic degradation of organic pollutants, and has potential application value in the field of photocatalytic treatment of sewage.

The invention relates to brazing technology for diamond. Firstly, a flame spraying method (an oxyacetylene welding torch) is used to plate solder alloy on a tool steel substrate, the diamond is arranged on the surface of a solder layer, then the high-frequency induction brazing is performed under the protection of argon at a temperature of 1,080 DEG C for 30 seconds to realize the combination of the diamond and the steel substrate, and main components of the solder alloy in percentage by mass comprise 72 percent of Ni, 14.4 percent of Cr, 3.5 percent of Fe, 3.5 percent of Si, 3.35 percent of B and 0.5 percent of O2. The technical proposal is adopted, so the brazing technology has high brazing quality and is suitable for industrialized operation.

The invention provides a method for reducing the fluorine content in water soluble active peptides from Antarctic krill. The method comprises the steps of carrying out protease hydrolysis on Antarctic krill powder to obtain a krill active peptide aqueous solution; mixing uniformly after a defluorination agent I and a defluorination agent II are sequentially added to the krill active peptide aqueous solution; centrifugally separating the active peptide aqueous solution to obtain a defluorinated supernatant; and carrying out spray drying on the defluorinated supernatant to obtain the product of water soluble Antarctic krill active peptide powder with low fluorine content. The method provided by the invention is simply operated, needs less equipment investment, has no environment pollution and high product recovery rate, and is suitable for industrial operation; the krill active peptide powder with low fluorine content obtained according to the method has the following characteristics that the fluorine content is reduced from 350-450 ppm to 2-5 ppm, the protein content is greater than 85 percent, no toxic substances are left, and the product safety is high; the content of necessary amino acids is high and meets the amino acid composition pattern modes stipulated in FAO / WHO.

The invention discloses a method for preparing a lithium iron phosphate / carbon anode material under a microwave heating condition with vacuum-protected environment; microwave heating is adopted to promote the graphitization of the carbon material, and the growth of lithium iron phosphate particles is inhibited in vacuum-protected environment; and thus a nanometer lithium iron phosphate / carbon anode material with high conductivity is obtained. The lithium iron phosphate / carbon material prepared by the invention has a conductivity of more than 10-4 S / cm, a particle size of less than 200 nanometers, a specific capacity of more than 140 mAh / g, and has comprehensive performance indexes higher than those of materials prepared by resistor heating in inert atmosphere protected environment under a same condition; and the preparation method is simple in operation, and is applicable to large-scale production.

The invention discloses a preparation method of a boron nitride fiber enhanced nitride ceramic-based composite material. The preparation method is characterized by comprising the following steps: mixing and ball-milling boron nitride short fibers, nitride powder and sintering aid powder; and performing hot pressed sintering to obtain the boron nitride fiber enhanced nitride ceramic-based composite material, wherein the length-diameter ratio of the boron nitride short fibers is (15-35): 1 and the adding amount of the boron nitride short fibers accounts for 3-20% by mass of all powder. The preparation method disclosed by the invention is simple in process, suitable for industrial operation and low in requirement on technical level of operators. The density of the composite material prepared by the preparation method reaches 1.9-2.95g / cm<3>, the tensile strength is greater than 50MPa, the bending strength is greater than 90MPa, the coefficient of linear expansion is less than 3.5*10<-6> (room temperature to 1200 DEG C), the dielectric constant (Ku waveband) is less than 5.5, and the dielectric loss (Ku waveband) is less than 8*10<-3>.

The invention relates to a device for purifying formic acid solution with interval azeotropic distillation and a method thereof. The device comprises a rectification column body, an insulating layer, a tower pot, a heating jacket, a condenser, a phase separator and a product storage tank, wherein, the insulating layer is arranged outside the column body, the lower end of the column body is connected with the tower pot, the upper end is respectively connected with the condenser and the phase separator, and the phase separator is respectively connected with the condenser and the product storage tank. The method comprises the following steps: firstly, cyclohexane is used as entrainer, and dilute formic acid water solution with mass concentration being 10% is initially concentrated to 30%; then, chlorobenzene is used as entrainer, the top of the tower continuously produces azeotrope of chlorobenzene and water; when the top of the tower reaches 95 DEG C-102 DEG C, the mixture of chlorobenzene, formic acid and water is produced, and the mass fraction of the formic acid is 60-70% after phase separating; at last, pressurization rectification is used, the pressure is controlled at 4atm, and the tower pot can obtain 80-85% high-concentration formic acid solution. The invention has the characteristics of reasonable process flow, simple device structure, high efficiency and low cost and is suitable for industrial continuous operation.

The invention discloses a solvent thermal induction control synthesis method for nano molybdate with a scheelite structure, which comprises the following steps: shifting molybdenum source solution and an oily solvent in an oil-water ratio of 0-3 to 1 respectively, slowly adding solution of bivalent metal ion salt into the solution while ultrasonic treatment, transferring the solution into a stainless steel autoclave, ensuring the volume of the reaction solution to be two thirds that of the autoclave, sealing the autoclave and then putting the autoclave into an oven at the temperature of between 120 and 200 DEG C, and heating the solution for 0.5 to 10 hours and then closing the oven; and cooling the solution to the room temperature and taking the solution out, and washing the settlement product with distilled water, acetone and anhydrous ethanol in turn after the supernatant liquid is absorbed, wherein the obtained product is a nano molybdate material in a fishbone, flower cluster, batten or granule shape with superior optical and electric performance. The method has the advantages of available raw materials, simple and feasible method, simple used instrument and equipment, high purity of the product, easily controlled appearance and structure of the product, convenient post treatment of the product, and contribution for industrialized operation.

A technology for deeply resolving by-product hydrochloric acid to prepare hydrogen chloride adopts the flow referring to the attached map, adopts a calcium chloride preparation tank, a calcium chloride solution reboiler and a calcium chloride solution concentration tower, and includes the following steps that the concentrated calcium chloride is heated and enters a desorption tower from the top of the desorption tower, then is in countercurrent contact with by-product hydrochloric acid from bottom to top; a plenty of water enters the calcium chloride solution, hydrogen chloride gas and gas-phase hydrochloric acid are discharged from the top of the desorption tower; the discharged hydrogen chloride gas and gas-phase hydrochloric acid are condensed into concentrated hydrochloric acid and hydrogen chloride gas; the calcium chloride solution discharged from the bottom of the desorption tower is concentrated by the calcium chloride solution concentration tower for recycling. The technology is characterized in that the by-product hydrochloric acid is heated and then vaporized in a vaporization tower, the gas-phase by-product hydrochloric acid enters the desorption tower for resolving, so as to prepare the hydrogen chloride gas, and high boiling point compounds, salts and solid impurities in the by-product hydrochloric acid can be discharged from the bottom of the vaporization tower for wastewater treatment; according to the invention, the by-product hydrochloric acid subjected to wastewater treatment and containing high boiling point compounds, salts and solid impurities is recycled and reused.

The invention discloses a composite flocculant as well as a preparation method and an application thereof and relates to the technical field of oily sludge treatment. The composite flocculant is prepared from raw materials in parts by weight as follows: 0.1-0.5 parts of cationic polyacrylamide, 1.0-2.5 parts of calcium chloride, 0.5-2.0 parts of sodium silicate, 8-20 parts of polyaluminium sulfate and 0.5-2.0 parts of EDTA-2Na. The raw materials in the proportion range have a synergistic interaction effect, the oily sludge treatment effect is good, demulsification can be realized without assistance of ultrasonic waves, heating or other methods, treatment cost and operation cost of oily sludge are reduced, and the composite flocculant has good water solubility, high stability and good flocculation effect and is widely applied to the oily sludge treatment process. The preparation method of the composite flocculant is simple and feasible and suitable for industrial production.

The invention aims at providing a method for reducing the content of volatile basic nitrogen in active peptides of euphausia superba. The method comprises the following steps: enzymatically hydrolyzing euphausia superba powder, and defluorinating to obtain an active peptide aqueous solution; adjusting the solid content of the active peptide aqueous solution of the euphausia superba by diluting or concentrating, and adding a swelling agent into the active peptide aqueous solution of the euphausia superba; heating the active peptide aqueous solution of the euphausia superba in vacuum for a period of time, cooling, and centrifuging to obtain supernatant; desalting the supernatant, and spray-drying to obtain an euphausia superba active peptide powder product with low volatile basic nitrogen content. The method is simple to perform, low in equipment investment, free of environmental pollution, high in efficiency and suitable for industrialized operation; the obtained euphausia superba active peptide powder with low volatile basic nitrogen content has the characteristics of no harmful material residues and high product safety.

The invention relates to the field of health food and discloses a preparation method of antrodia cinnamomea health wine. The method comprises the following steps of drying and grinding antrodia cinnamomea and then filling ground antrodia cinnamomea in a chromatographic column, adding white wine and carrying out percolation, preparing a solution from percolate and L-arabinose, and sealing the solution and standing away from light, thus obtaining the antrodia cinnamomea health wine. The preparation method has the beneficial effects that the adopted equipment is simple and cheap; the process conditions are mild and are easy to control; the raw materials have high use ratios and extraction efficiency and have great commercial values; the obtained antrodia cinnamomea health wine is rich in active ingredients such as triterpenoids, beta-glucan, adenosine, superoxide dismutase, amino acid and the like, is abundant in variety and high in content, and has various physiological functions; meanwhile, the method has the effect of effectively removing harmful ingredients, and the product is clean and safe and has excellent quality.

The invention discloses a preparation method of isoniazid. The method comprises the following steps: 1) performing esterification reaction to isonicotinic acid, alcohol and acylating reagent to obtain isonicotinic acid ester; 2) performing condensation reaction to isonicotinic acid ester and hydrazine hydrate and performing post-treatment to reaction liquid to obtain isoniazid finished products. The isoniazid is prepared firstly through esterification of isonicotinic acid and alcohol and then condensation of the obtained ester and hydrazine hydrate. The method can well control the content of impurities in the target product isoniazid, high-purity isoniazid can be obtained, the purity is above 99.9 percent and the content of individual impurity is smaller than 0.10 percent. The method is simple to operate, is easy to control and is applicable to industrial operation. In addition, by using recovered isonicotinic acid to prepare isoniazid, the cyclic utilization of resources can be realized, the waste emission is reduced, the cost is reduced and the method is very suitable for industrial production.

The invention belongs to the technical field of agricultural planting, and particularly relates to a biomass organic fertilizer and a preparation method thereof. The biomass organic fertilizer, of which the total weight is 100%, provided by the invention comprises the following ingredients in percentage by weight: 70-90% of a muck mixture, 1-10% of medium trace elements, 1-10% of humic acid and 1-10% of a compound microbial agent, wherein the muck mixture comprises edible oil residue and attapulgite. Under the synergistic effect of the muck mixture, the medium trace elements, the humic acid and the compound microbial agent which have weight ratios as shown above, the biomass organic fertilizer can provide organic matter and the medium trace elements required for crops to grow, improves thephysical and chemical properties of soil, reduces the curing degree of the medium trace elements in the soil, promotes the crops to absorb and utilize nutrients, preserves moisture and fertility, provides a good growth environment for the crops, can improves the stress resistance and disease resistance of the crops, strengthens root systems, regulates the growth and development of the crops comprehensively, and promotes the crops to have a high yield.

The invention discloses a preparation method of a copper and zinc bi-coordination polymer. The preparation method comprises the steps of firstly, preparing a zinc complex under a solvothermal condition; and then, doping a small amount of copper ions to obtain the copper and zinc bi-coordination polymer. Compared with the existing method, the preparation method disclosed by the invention has the advantages that the reaction effect for catalyzing light degradation of rhodamine B by using a zinc complex catalyst doped with a small amount of the copper ions is better, recycling can be realized, and relatively high catalysis efficiency is kept.

The invention discloses a method for synthesis of microemulsion of strontium molybdate nano light emitting material, comprising the steps of preparing 0.2 mol / L strontium chloride solution and 0.2 mol / L molybdenum source solution, adding mixed solution of the n-butyl alcohol and the surfactant of ethane-di-dodecyl dimethyl ammonium bromide, n-octane and the strontium chloride solution to a container in sequence, supersonically oscillating the container, placing the container in a constant-temperature water bath until the solution in the contain being clear and transparent to obtain strontium chloride microemulsion, preparing molybdenum source microemulsion by using the molybdenum source solution rather than the strontium chloride solution with the similar method, rapidly mixing the strontium chloride microemulsion and the molybdenum source microemulsion, supersonically oscillating the strontium chloride microemulsion and the molybdenum source microemulsion until the strontium chloride microemulsion and the molybdenum source microemulsion being evenly mixing, adding acetone for demulsifing after the reaction of the strontium chloride microemulsion and the molybdenum source microemulsion, absorbing supernatant liquor, and washing the deposited products of reaction with distilled water, acetone and absolute ethyl alcohol in sequence to obtain the strontium molybdate nano emitting material which has the length of 100-600nm and the maximum width of 30-200nm and is in the structure of spindle. The method for synthesizing strontium molybdate nano emitting material microemulsion is easy to obtain the raw materials, is simple, has low cost, ensures that the product of reaction has high purity and controllable morphology and size and is suitable for the scale production.

The invention discloses a seedling-raising method using a poplar root sucker and a container hardwood cutting together, comprising the following steps of: (1) raising seedlings by the container hardwood cutting through directly adopting the hardwoods of annual nursery stocks to obtain container seedlings if the breeds of poplars to be propagated are annual nursery stocks; and excavating the root systems of the adult trees of the poplars and shearing the root systems to cuttings for the seedling raising of container root cutting to obtain the container seedlings if the breeds of the poplars to be propagated are adult trees; (2) transplanting the obtained container seedlings in nursery land for nursery stock breeding; (3) after leaves fall in the same year or seedlings are lifted in spring of the ensuing year, carrying away qualified seedlings for forestation and translating the seedling-lifted nursery land into root sucker seedling-raising nursery land; and (4) carrying out the container hardwood cutting seedling raising by using the substandard seedlings bred by the root sucker. The seedling-raising method has the advantages of simple technical link, low seedling-raising cost, high cutting survival rate and no influences on the position effect and the maturation effect of scion grafting, can ensure the sustainable seedling-raising utilization of the large-scale high-efficiency vegetative propagation and fine vegetative propagation materials of the fine breeds of the poplars.

The invention belongs to a production process of a dendritic polymer, in particular to a production process of a dendritic polyamidoamine. The reaction temperature is precisely controlled by a low-temperature circulator. The initial reaction temperature is controlled at about -5±2°C, and after the addition of materials, the reaction temperature is controlled at 20±2°C to make the reaction more stable, and the appropriate excess monomer ratio can be adjusted to reduce the generation of by-products. , cooperate with ton-scale industrial synthesis reactor to realize industrial production scale; for the first time, continuous feeding and discharging rotary evaporation equipment is used to purify dendrimeric polyamidoamine to improve purification efficiency; The raw materials are recovered and purified to obtain reusable raw materials, which further reduces the cost of raw materials in industrial production.

The invention discloses high-performance lithium ion phosphate materials prepared by a microwave method and a preparation method of the high-performance lithium ion phosphate materials. Under the condition of microwave heating, microwave absorption is added into a precursor to prepare the high-performance lithium ion phosphate materials, the microwave absorption can be used as a heat source during heating, and a lithium ion phosphate end product can be used as a doping substance or a complex. The microwave absorption is divided into a magnetic material and a polarity material, includes the magnetic materials comprising transition elements and rare earth elements, and also includes polarity compounds such as non-face-centered cubic-structure compounds, non-polarity carbonaceous organic materials, metal organic compounds and the like. When the lithium ion phosphate materials are prepared by the method, heat treatment time can be shortened, heat utilization efficiency is improved, the materials have higher electric conductivity and electrochemical performance, and comprehensive performance indexes of the high-performance lithium ion phosphate materials are higher than materials prepared by means of resistance type heating and in an inert atmosphere protection environment under equal conditions. The preparation method is simple and convenient in operation and easy for massive production.

The invention relates to an E-ring substituted silybin derivative and a preparation method and medical application thereof, in particular to synthesis of the E-ring substituted silybin derivative and medical application of the compound or the pharmaceutically acceptable salts of the compound in preparing the medicines for preventing physiological disorders or diseases caused by oxidative stress. The compound has the activity of protecting the hydrogen peroxide induced rat adrenal pheochromocytoma (PC12) cell from injury, namely having the anti-oxidative injury protection effect on the PC12 cell simulating the brain nerve cell, and also has the activity of suppressing xanthine oxidase, thus the compound can be expectedly developed to have the medical applications in preparing the medicines for preventing the neurodegenerative diseases such as oxidation of the brain nerve cell, senile dementia and the like, and the medicines for preventing the diseases caused by xanthine oxidase, such as gout.

The invention discloses a method for synthesizing acetyl-trans-resveratrol. The method comprises the following steps: (1) using 3,4',5-trimethoxystilbene as a raw material, and adopting a complex prepared from aluminum trichloride and triethylamine as a demethylation reagentl; under the action of inorganic salt, and carrying out demethylating reaction so as to obtain trans-resveratrol; (2) under the action of triethylamine, carrying out acetylated reaction for the obtained trans-resveratrol and acetic anhydride so as to obtain the acetyl-trans-resveratrol. The method has the advantages of being high in yield, good in product quality, environment-friendly and low in cost, is suitable for industrialization, is simple in preparation, is suitable for industrialized operation, can reduce impurities, improves the product quality, and has a wide application prospect.

The invention discloses a preparation method of ferric carboxymaltose, which comprises the steps of adding a sodium carbonate solution into a mixed system of a carboxyl maltodextrin solution and a ferric trichloride solution at a constant speed within 0.3-4 hours, and controlling the adding speed of the sodium carbonate solution to obtain ferric carboxymaltose with target molecular weight and molecular weight distribution coefficient, wherein in terms of ferric trichloride hexahydrate, the mass ratio of ferric trichloride to sodium carbonate is 2: 1-3: 1. According to the method, actual production and the raw material ratio, material concentration, pH value, temperature and the like of a fixed reaction system are combined, the uniform adding speed of the sodium carbonate solution is controlled, and the ferric carboxymaltose with different target molecular weights is obtained. The method is simple, low in equipment and technical requirements and especially suitable for industrial operation and suitable for industrial production, and has great practical significance in actual production.

The invention belongs to the field of medicine preparations, and in particular relates to application of cyclodextrin in preparing a radioactive iodine labeling hypericum monogynum medicine preparation. The cyclodextrin is applied to preparation of a radioactive iodine labeling hypericum monogynum medicine' preparation first a first time; the cyclodextrin is an oligo ring compound of glucose, is non-toxic to human bodies, hydroxypropyl-beta-cyclodextrin is approved by China as an auxiliary material for intravenous injection; meanwhile, compared with other solvents, the auxiliary material can greatly improve the water solubility of hypericin on premise that the iodine labeling efficiency is ensured, the radioactive iodine labeling hypericum monogynum medicine dissolved in the cyclodextrin is rapid in blood clearance, and the necrosis targeting of the medicine is not different from that of conventional preparations, so that the cyclodextrin can be used as a DMSO (Dimethyl Sulfoxide) substituent applied to the radioactive iodine labeling hypericum monogynum medicine preparation; the method for preparing the radioactive iodine labeling hypericum monogynum medicine preparation is simple in process, low in cost, high in preparation efficiency and applicable to industrial operation.

The invention relates to a new method and an apparatus of membrane-method calcium chloride mother liquid concentration. The method includes the following particular steps: (1) regulating the pH of a to-be-concentrated low-concentration calcium chloride mother liquid to 6.0-6.5 with hydrochloric acid; (2) adding 0.01-0.5% of a chelating agent R; (3) in a liquid storage tank 1, performing temperature-constant treatment to the to-be-concentrated low-concentration calcium chloride mother liquid to 65 + / - 2 DEG C; (4) pumping the material liquid through a liquid transportation pump 2, enabling the material liquid to flow through a membrane core of a hydrophobic membrane assembly 7, feeding the material liquid to a pump body, and finally enabling the material liquid to flow through a rotor flow meter 3, a pressure meter 4 and a temperature meter 5 and then feeding the material liquid back to the liquid storage tank 1 for further circulation; (5) when a vacuum pump 9 is started, pumping one part of evaporated material liquid into a condenser 8 through the vacuum pump 9 through micropores on the hydrophobic membrane assembly 7, and cooling the evaporated material liquid and feeding the evaporated material liquid into a collection bottle 6; and (6) enabling the other part of the material liquid to flow out through the hydrophobic membrane assembly 7 back into the liquid storage tank 1, thereby concentrating the material liquid in the liquid storage tank 1 and finally reaching the concentration of not less than 30%.

The invention discloses a synthetic method of a hydroxy-substituted-3,4-dihydro-2(1H)-quinolinone compound, comprising the following steps of: mixing hydroxy-substituted aniline and propionyl chloride; reacting under the action of a gemini surfactant as shown in the formula (II) at the temperature of 100-150 DEG C for 1-20 h; and carrying out post-processing on the reaction solution after the reaction so as to obtain the hydroxy-substituted-3,4-dihydro-2(1H)-quinolinone compound. The synthetic method provided by the invention is simple, has advantages of cheap and easily available raw materials, good yield, low cost and repeatedly usable reaction system, and is suitable for industrial operation.

The invention provides high-weight high-strength phenol formaldehyde foam and a preparation method thereof. The foam is mainly prepared from the following raw materials in parts by weight: 100 parts of high-viscosity phenolic resin, 4 to 6 parts of silica sol, 3 to 5 parts of pH regulators, 2 to 4 parts of potassium silicate, 7 to 10 parts of foaming agents, 5 to 10 parts of emulsifiers and 10 to 16 parts of curing agents. The preparation method of the foam has the advantages that nanometer silicon dioxide particles are introduced into formaldehyde foam by using silica sol / potassium silicate; Si-O-C chemical bonds are generated by using the effects of nanometer silicon dioxide and high-viscosity phenolic resin; an interface enhancing effect is generated. Concretely, in a container with a stirring function, the raw materials are added according to the proportion ratio; after the materials are uniformly stirred, the materials are fast poured into a mold; foaming is performed at 65 to 70 DEG C; the heat insulation is performed for 20 to 30 min; demoulding is performed. The mechanical intensity is improved; the production cost is reduced; the heat resistance is improved; the operation is simple; the method is suitable for industrialized operation.

The invention discloses a seedling-raising method using a poplar root sucker and a container hardwood cutting together, comprising the following steps of: (1) raising seedlings by the container hardwood cutting through directly adopting the hardwoods of annual nursery stocks to obtain container seedlings if the breeds of poplars to be propagated are annual nursery stocks; and excavating the root systems of the adult trees of the poplars and shearing the root systems to cuttings for the seedling raising of container root cutting to obtain the container seedlings if the breeds of the poplars tobe propagated are adult trees; (2) transplanting the obtained container seedlings in nursery land for nursery stock breeding; (3) after leaves fall in the same year or seedlings are lifted in spring of the ensuing year, carrying away qualified seedlings for forestation and translating the seedling-lifted nursery land into root sucker seedling-raising nursery land; and (4) carrying out the container hardwood cutting seedling raising by using the substandard seedlings bred by the root sucker. The seedling-raising method has the advantages of simple technical link, low seedling-raising cost, high cutting survival rate and no influences on the position effect and the maturation effect of scion grafting, can ensure the sustainable seedling-raising utilization of the large-scale high-efficiency vegetative propagation and fine vegetative propagation materials of the fine breeds of the poplars.