80results about How to "Low Inorganic Salt Content" patented technology

The invention relates to a synthesis method of amino-protecting glycine dipeptidase derivant. The amino-protecting glycine dipeptidase derivant is N-9-Fmoc glycine dipeptidase, N-Boc glycine dipeptidase and N-acetyl glycine dipeptidase. The invention has the technology that glycine dipeptidase is dissolved in 1-20% of inorganic aqueous alkali, and the organic solution of Fmoc-OSu or Boc2O or Ac2Ois dropwise added; reaction is finished within 1-12 hours, the yield of the product Fmoc-Gly-Gly-OH, Boc-Gly-Gly-OH and Ac-Gly-Gly-OH is between 80-95%, and the content of the product is above 99%. The invention has simple technology, easy industrialization and low cost. The product of the invention is the important raw material for synthesizing polypeptide compound.

The invention provides a glufosinate purifying technology including the following steps: (1) adding glufosinate hydrochloride to alcohol R1OH, adding R2NH2 for ammoniation, adjusting the pH to 7.0-14.0, cooling and filtering, removing a solvent from a filtrate to obtain glufosinate ammonium salt and a small amount of organic impurities; (2) dissolving the glufosinate ammonium salt obtained by the steps (1) in an appropriate amount of water, leading in CO2 for neutralizing to the pH of 2.0-5.0, adding a proper amount of alcohol R3OH for precipitation of glufosinate acid, centrifugally filtrating to obtain the glufosinate acid which contains a small amount of ammonium hydrogen carbonate or organic amine carbonates; (3) heating for drying a glufosinate acid filtering cake obtained by the step (2) for decomposition and volatilization of the ammonium hydrogen carbonate or organic amine carbonates to obtain high purity glufosinate acid. The glufosinate purifying technology is simple in steps, the obtained glufosinate is low in inorganic salt content and high in purity, and compared with a traditional technology using epoxy ethane and epoxy propane, the purifying technology using carbon dioxide for separation of glufosinate hydrochloride and HCl is more economical, and high in safety, and has a higher industrialization prospect.

A novel method for simultaneously extracting caffeine, tea polyphenol and tea polysaccharide from tea using mechanochemical principles comprises the following steps: firstly, mixing tea raw materials and solid reagents in a mass ratio of 1:0.01-20, fully pulverizing the mixture for 1 min-60 min, taking out the pulverized powder, soaking the pulverized powder under stirring 1-10 times for 1-60 min with an organic solvent in an amount of 1-20 times the mass of the tea raw materials, filtering, collecting organic phase eluted a plurality of times, concentrating to obtain a mixture of caffeine and chlorophyll which is used to prepare caffeine by a regular method; secondly, soaking the solid tea powder in which caffeine and the chlorophyll have been removed with water in an amount of 1-5 times the mass of tea, adding acids to adjust the pH value to be not more than 7, soaking the pulverized powder under stirring 1-10 times for 1-60 min with a 1 to 20-fold amount of an organic solvent, filtering, collecting the tea polyphenol-containing organic solvent phase during each filtration, drying to obtain tea polyphenol, and if necessary, further purifying the tea polyphenol by other methods; thirdly, adding the tea residue processed in above steps into water in an amount of 5-10 times the volume of the tea residue, extracting at a temperature of 100 DEG C, centrifuging the extract to obtain a supernatant, adding anhydrous ethanol in an amount of 3 times the volume of the supernatant, allowing tea polysaccharide to precipitate for 24 h, centrifuging, and drying the precipitate to obtain the tea polysaccharide.

The invention discloses a method for preparing high-purity glufosinate-ammonium by adopting an organic alkali deacidification method, belonging to the technical field of preparation of the glufosinate-ammonium. The method comprises the following steps: by taking glufosinate-ammonium hydrochloride as a raw material, dissolving the glufosinate-ammonium hydrochloride into alcohol R1OH, and thermally filtering out inorganic salt and mechanical impurities; partially concentrating the filtrate, adding organic alkali R2R3R4N for a deacidification reaction, cooling and filtering out glufosinate-ammonium free alkali; adding a crude glufosinate-ammonium free alkali product into the alcohol R1OH, introducing ammonia gas, cooling and filtering to obtain a glufosinate-ammonium product; and recycling an alcohol solvent from crystallization mother liquor of the free alkali, subsequently adding into an inorganic alkaline water solution for neutralization, separating out the organic alkali in the upper layer and directly using the organic alkali in the deacidification reaction. The method disclosed by the invention can be used for effectively removing a small amount of inorganic matters including ammonium chloride, sodium chloride, the mechanical impurities, hydrogen chloride and the like from the glufosinate-ammonium hydrochloride, also can be used for simply and conveniently preparing a high-purity glufosinate-ammonium product without introducing new impurities and organic byproducts and has good industrial application prospects.

The invention discloses a fast propagation method of orchid tissue culture, including culture steps of inducing, reproducing and successive transfer. An inducing medium used for inducing culture is a semi-solid medium taking an improved MS as a basic medium and adding with other ingredients; a medium used for reproducing and successive transfer is a two-phase medium of liquid and solid taking the improved MS as the basic medium and adding with other ingredients. The gentle shaking of a temperature-controlling shaking bed is combined into the invention. The invention realizes the target of highly efficient inducing and reproducing, alleviating browning and effective successive transfer, which is especially suitable for the orchid tissue culture.

The invention relates to a method for comprehensive and safe utilization of domestic garbage incineration fly ash. The method has the characteristic of comprising the steps: mixing the domestic garbage incineration fly ash with a specific inorganic curing agent and water at a weight ratio of (1-10):1:1 so as to form a mixture, molding the mixture, curing the molded product at a certain temperature for a period of time, immersing the cured product in water at 5-100 DEG C for a certain period of time, putting the solid phase product in a plasma processing device after soaking, and performing melting or sintering at a high temperature of 1200-1500 DEG C so as to form a vitreous body or ceramsite. Through the method, the technical problem of difficult separation of a large amount of inorganic salts in the domestic garbage incineration fly ash is solved effectively, a feasible technical method is provided for resource utilization of the high value-added inorganic salts in the domestic garbage incineration fly ash, and a large amount of the inorganic salts in the domestic garbage incineration fly ash is removed, so that the effect and efficiency of fly ash treatment through plasma hot melt are improved significantly, and safe and reliable building materials obtained through resource utilization of the fly ash are obtained.

The invention relates to an enriching method of preparing polycarboxylic acids water reducer, is characterized in that: during the process of producing polycarboxylic acids water reducer high molecular polymer, when synthesis of polymer is end, directly leaving polymer aqueous system in original reactor or shifting to other container, stewing and cooling, making polymer separated from water systerm and depositing at the bottom of the container, separating polymer from water with physical means, to get condensation aqueous polycarboxylic acids product. Compared with traditional enriching method using heating evaporation, decompression evaporation, or combining both, the method has low apparatus requirement, small energy consumption, simple productive technology, low cost and high water reducing ration.

The invention relates to an alkali-resisting penetrating agent for cotton fabric mercerization. The penetrating agent is characterized by comprising the following ingredients in parts by weight: 60-100 parts of sulfamic acid, 25-80 parts of fatty alcohol, 45-150 parts of (EO:7-10) fatty alcohol ether and 2-45 parts of catalyst. A preparation method of the alkali-resisting penetrating agent comprises the following steps: putting the fatty alcohol and the fatty alcohol ether in proportion into a three-opening bottle of 500ml, starting stirring, adding the catalyst and the sulfamic acid, powering on a condenser for backflow, heating to 120 DEG C, performing heat preservation for 120 minutes, adding 100 parts of soft water slowly when the temperature is less than 100 DEG C, and stirring uniformly and subsequently regulating the pH value to 8-8.5 by use of a sodium hydroxide water solution. The alkali-resisting penetrating agent provided by the invention has the beneficial effects that the investment is less, three wastes (waste air, waste water and industrial residual) are prevented, the product is low in color, and the inorganic salt content is low.

The invention discloses a method for preparing a cucumber soilless culture substrate based on shiitake mushroom bran. The method comprises the following steps that the shiitake mushroom bran which is complete, free of contamination and left after five times of fruiting is chosen and dried in the sun or dried through baking; impurities are removed; the shiitake mushroom bran is crushed by a crusher to have the grain diameter within the range of 1-5mm; lime water is used for regulating the pH to be 7.0, and then water is added for regulating the humidity to be 60%; the shiitake mushroom bran is placed in a closed container and sealed for fermentation at the room temperature; 30 days later, the shiitake mushroom bran is taken out and dried in the sun or dried through baking to be used; the shiitake mushroom bran and peat are mixed according to the weight ratio within the range of 7:3-6:4; after the shiitake mushroom bran and the peat are mixed uniformly, the lime water is used for regulating the pH to be 6.5, and then the mixture can be used; the water content of the mixture ranges from 20% to 30%, and the cucumber soilless culture substrate is obtained. The method for preparing the cucumber soilless culture substrate based on the shiitake mushroom bran has the advantages of being practical, low in preparing cost, simple in preparing method, and convenient to popularize and apply, utilizing the shiitake mushroom bran effectively and reasonably, reducing the waste of the shiitake mushroom bran, lowering the risk caused by the situation that the shiitake mushroom bran is directly thrown in the environment, and increasing the use value of the shiitake mushroom bran.

The invention discloses a two-in-one combination for shampooing and bathing for children. The combination consists of deionized water, a tender surfactant, a thickener, a neutralizer, a conditioner, an antiseptic substance and essence, wherein the tender surfactant consists of potassium lauryl phosphate, cocamidopropyl hydroxy betaine, coco-glucoside hydroxypropyl sodium sulfonate and ricinoleamidopropyltrimethyl ammonium chloride. The two-in-one combination is a clear and weakly acidic formula, and produced foams are soft, smooth and easy to wash; the two-in-one combination is rich in olive oil and oat and can be used for deeply moistening the skin of a user so as to re-nourish the skin; the two-in-one combination is not oily, has no stimulation, and can be used for effectively moistening the tender skin of a baby. According to the invention, the tenderest and safest surfactant and the tenderest and safest neutralizer are adopted, so that the safety of the two-in-one combination in children products is ensured; the tenderest antiseptic substance is adopted, so that the tenderness and the safety of the product are ensured at the utmost.

The invention discloses a method for two-in and three-out fractional extraction and group separation of europium-rich middle yttrium ore. Two rare-earth feed liquid feeding holes and three rare-earth product solution outlets are formed in a fractional extraction system; chlorinated rare-earth feed liquid of the europium-rich middle yttrium ore is divided into two parts, and is fed to the fractional extraction system from different feeding holes; a third outlet is formed in a water phase of an extraction eluting section, so as to obtain three products; P507 is used as an extracting agent; light rare-earth elements 'La-Nd' products, heavy rare-earth elements 'Ho-Lu+Y' products and medium rare-earth 'Sm-Dy' enriched products are obtained by adopting the method for two-in and three-out fractional extraction and group separation of europium-rich middle yttrium ore Nd / Sm-Dy / Ho. Compared with an existing process for group separation of Nd / Sm-Dy / Ho at three water outlets in the water phase of the P507 extraction eluting section, the method has the advantages that the saponification alkali consumption is reduced by 28%-36%; the acid consumption of the washing acid is reduced by 34%-42%; the separation cost is low; and the green degree is high.

The invention relates to a preparation method of s-(-)-ornidazole disodium phosphate suitable for industrialization. Through the adoption of the scheme, the solvent of methylbenzene in the recrystallization process of S-ornidazole is prevented from being used, and a recrystallization scheme completely without pollution is adopted. Moreover, excess phosphorus oxychloride is removed in advance in the preparation process of the s-(-)-ornidazole disodium phosphate, and thus the content of inorganic salt in a prepared sample is obviously reduced, and the product quality is obviously improved.

The invention discloses a preparation method of N-lauroyl-L-alanine saline solution with low inorganic salt content. The method comprises a reacting step, a separating step, a desolventizing step and a neutralizing step. According to the invention, after reaction, the separating frequency and the separating technological parameters can be controlled for obtaining the end-product with low inorganic salt content, and the content of ethyl ester by-products in the N-lauroyl-L-alanine saline solution is lower than 0.1%.

The invention relates to a preparative method of anion surfactant of IgeponA series belongs to the technical field of organic compound synthesis. By mixing fatty acyl chloride, fatty acid and hydroxyethyl sodium dithionite, reacting in a normal-pressure reaction apparatus in a heated manner, the product is produced. The invention adopts a few HCI produced in the reaction as the catalyst to speed up the reaction and reduce the irritant property of the product as well as the contact of the organic salt. The odor and the color of the product are thin. With wide application range, the invention is consistent with the basic principle of green chemistry.

The invention provides a multi-split central air conditioning unit condensation water recycling system comprising a condensation water recycling device and pad-fan cooling devices. The condensation water recycling device is connected with an evaporator at the tail end of an air conditioning unit, the pad-fan cooling devices are mounted at air inlets of condensers of the air conditioning unit, the condensation water recycling device is connected with the pad-fan cooling devices through branch water outlet pipes, and a flow regulating valve is arranged on each branch water outlet pipe. Condensation water of the system is collected to serve as a water source of the pad-fan cooling devices, so that dual purposes of air conditioning energy saving and no condensation water emission are achieved; flow control devices are arranged in the condensation water recycling system, so that the condensation water collected from each evaporation unit can be reasonably redistributed and delivered according to working load of each condenser, and utilization rate of energy resources is increased to the greatest extent; water for pad-fan evaporation is mainly from evaporator condensation water of an air conditioning system, the water is quite low in inorganic salt content and close to distilled water, and a pad fan and condenser fins can be prevented from scaling after long-term use.

The invention belongs to the field of textile fabric dyeing, and particularly relates to an instant accelerating agent for a reactive dye and an application method of the instant accelerating agent. The instant accelerating agent comprises, by weight, 1-5 parts of sodium hydroxide, 2-3 parts of sodium carbonate, 0.5 part of polyvinylpyrrolidone, 1-5parts of potassium carbonate, 1-5 parts of sodium-2-naphthalene sulfonate, 1-5 parts of sodium gluconate, 4-8 parts of potassium sulphate, 25-40 parts of sodium chloride and 30-60 parts of sodium sulfate. Compared with the prior art, the instant accelerating agent and the application method have the advantages that a reasonable formula is utilized, so that the instant accelerating agent effectively replaces anhydrous sodium sulphate and sodium carbonate in use, the addition amount of inorganic salt is reduced and is 68-70% of the original usage amount, the product quality is improved, meanwhile, the production time is reduced, the cost is saved, the enterprise benefits are ensured, the content of the inorganic salt in dye-bath water is reduced, the number of times for after-treatment washing is reduced, the wastewater treatment degree is reduced, and the instant accelerating agent is suitable for large-scale application and popularization.

The invention discloses a process for refining caprolactam. The process comprises the following steps: performing a hydrogenation reaction on a coarse caprolactam aqueous solution which is obtain after an extraction process; then, adsorbing by ion exchange; and further concentrating and distilling to prepare high-purity caprolactam. The process breaks through the convention of sequentially adsorbing and hydrogenating in the prior art, the extracted caprolactam aqueous solution is refined by adopting a process of sequentially hydrogenating and adsorbing by ion exchange, so that the content of impurities and inorganic salt which exist in coarse caprolactam and influence the product quality can be effectively reduced, and the coarse caprolactam can be purified. According to the process, the use cycle of ion exchange resin is prolonged, the number of regeneration times is reduced, massive wastewater generated by ion exchange resin regeneration is avoided, cost and resources can be reduced on the premise of improving the product quality, and pollution can be reduced.

The invention discloses an active turquoise blue dye used in digital ink-jet printing, and a preparation method thereof. The invention belongs to the technical field of fine chemicals. According to the invention, a commercial K-GL active turquoise blue dye is adopted as a raw material, and a crude dye solution is prepared; particle impurities are removed from the crude dye by using microwaves; inorganic salts are removed through charged mosaic membrane constant-volume purification, such that the purity of the dye is improved; and water is removed through a charged mosaic membrane condensation method, such that the concentration of the dye is increased. The liquid active turquoise blue dye product provided by the invention has purity higher than 99.5%, concentration higher than 150g / L, and good stability. The dye can be used for preparing digital ink-jet printing inks. Also, through spray-drying, the liquid dye can be prepared into a high-purity active turquoise blue solid dye. Under a temperate of 20 DEG C, the dissolubility of the solid dye is higher than 260g / L.

The invention discloses a biochemical system auxiliary device. The biochemical system auxiliary device comprises a power supply controller, insulation tubes, and at least two parallel positive and negative electrodes and / or zero, one or multiple pairs of positive and negative fuel cell electrodes; each electrode comprises a tank body, electrode pore plates vertical to a water inlet direction are inserted in the tank body, at least three rows of electrode pore plates, which are made from piezoelectric / contact alloy, are arranged at a sewage feeding end, and at least twenty rows of electrode pore plates, which are made from rare-earth alloy, are arranged at a sewage discharging end; the fuel cell electrodes are mesh-shaped; the power supply controller is respectively connected with the electrodes and the fuel cell electrode. The biochemical auxiliary device not only can perform a high-performance-cost pre-treatment on sewage, but also can culture targeting bacteria online in a biochemical system; a fuel cell can eliminate charge accumulation toxicity of the biochemical system, so that the biochemical system efficiently and stably runs, the digestion ability to COD is improved by more than two times, and the biochemical effluent index is improved by more than 50%.

The invention relates to the field of chemical pharmacy, and specifically provides a sodium dimercaptopropansulfonate preparation method. The sodium dimercaptopropansulfonate preparation method comprises that 1) sodium allyl sulfonate and bromine are subjected to a reaction under the effect of an auxiliary agent to obtain sodium dibromo propansulfonate, wherein the auxiliary agent is selected from sodium bromide, sodium iodide, or a combination thereof; 2) the sodium dibromo propanesulfonate obtained in step 1), sodium hydrosulfide and zinc acetate are subjected to a reaction to obtain a sodium dimercaptopropansulfonate-zinc complex; and 3) the sodium dimercaptopropansulfonate-zinc complex obtained in the step 2) reacts with hydrogen sulfide to obtain the sodium dimercaptopropansulfonate. According to the present invention, the preparation method has characteristics of low toxicity of the used reagent, low environmental pollution, low cost of zinc acetate, low consumption, low cost, simple process, no requirement of high pressure equipment and safe operation, and is suitable for industrial production, and the obtained sodium dimercaptopropansulfonate has the high purity and meets the quality requirements of the bulk drug.

Method of using SO*-air mixture to produce alkylphenol sulfonic acid and salts thereof via film sulfonator sulfonated alkylphenol, belongs to sulphonate preparing technology field. The invention uses alkylphenol as raw material, and uses SO[3]-air mixture to sulfonate the raw material via film sulfonator to obtain alkylphenol sulfonic acid, and uses alkaline solution such as NaOH to neutralize the alkylphenol sulfonic acid to obtain alkylphenol sulphonate, the alkylphenol used is a alkylphenol containing one or two C[1]-C[20] straight-chain or branched chain alkyl; the alkylphenol sulfonic acid and salt thereof prepared by the method has high sulphonation rate, low free oil content, low inorganic salt content and producing no spend acid, which is no corrosion to equipments and helpful for environmental protection.

The invention discloses a preparation process of stearate, which is a preparation method for preparing stearate by directly reacting metal oxide or hydroxide with stearic acid. The process has the advantages of short flow, less equipment consumption, low investment, no waste liquid generation, environmental pollution elimination, saving of a large amount of caustic soda, product cost reduction, less process loss of raw materials, contribution to improving the product yield, and the yield of the finished stearate being 98 percent or more calculated by stearic acid. In addition, no other salt isgenerated in the preparation process, and the stearate product has low inorganic salt content, so that the quality of the product is improved, and the technical scheme disclosed by the invention is suitable for popularization and application.

The invention discloses a method for extracting total flavonoids from hibiscus manihot. The method comprises the following steps: (1) extracting, wherein an ethanol solution having the mass concentration of 40-99% is used as an extraction solution and a hibiscus manihot total flavonoid extract is obtained by virtue of microwave extraction; (2) purifying, namely enabling the hibiscus manihot total flavonoid extract to sequentially pass through hollow fiber ultrafiltration membranes having the molecular weight cutoffs of 10000-50000Da and 2000-6000Da and collecting penetration liquid; next, concentrating the penetration liquid by use of a nanofiltration membrane having the molecular weight cutoff of 100-500Da, thereby obtaining a hibiscus manihot total flavonoid concentrated liquid; (3) refining, namely adsorbing the hibiscus manihot concentrated liquid by use of a macroporous adsorption resin, orderly performing water washing and alcohol washing, and performing freeze-drying to obtain the hibiscus manihot total flavonoids. Compared with the prior art, the technology of the method is capable of greatly increasing the hibiscus manihot total flavonoid extraction ratio, and also capable of reducing the content of macromolecular saccharides and protein in the product, reducing the content of metal ions and inorganic salt in the product and improving the product purity.

The invention discloses a biochemical pretreatment technology of high-hardness and high-salinity papermaking wastewater. The biochemical pretreatment technology comprises a physicochemical treatment step, a conveying step, a strong aeration step, a precipitating step and a discharging step, wherein strong aeration is performed through a jet aeration system adopting variable frequency control and a staggered perforated aeration pipe which are arranged inside a strong aeration tank, so that the papermaking wastewater is fully mixed in the strong aeration tank. The biochemical pretreatment technology of the high-hardness and high-salinity papermaking wastewater, provided by the invention, is simple and feasible, and stable in treatment effect; by the biochemical pretreatment technology, the high-hardness and high-salinity papermaking wastewater can be effectively softened to improve water quality and reduce water hardness and inorganic salt content, so that a requirement on continuous and stable operation of a subsequent biochemical system is met; a whole process is clean and pollution-free, environment-friendly and energy-saving, and very low in running energy consumption and running cost.

A production process of the non-phosgene synthesis of scarlet acid particularly comprises the following steps: firstly dissolving J acid into water, adjusting the pH of the solution medium with 30% liquid alkali to obtain a pH of about 7, after complete dissolution, adding bis(trichloromethyl)carbonate with a theoretical amount being 16.7% of the feeding amount of the J acid, performing phosgenation reaction under a controlled temperature of 35-65 DEG C, wherein a reaction end point is reached when no NaOH is consumed and the content of the J acid in materials is not more than 5 g / L. In the process, the amount of bis(trichloromethyl)carbonate approaches the theoretical amount, so the amount of the liquid alkali is reduced by two-thirds; the inorganic salt content in the product is greatly decreased; the product quality is improved; the reaction condition is safe and moderate; the danger of the phosgene toxicity is eliminated essentially; and the process is applicable to industrial production.

A method for concentrating polycarboxylate water-reducers, characterized in that: in the process of producing polycarboxylate water-reducers high molecular polymers, after the polymer synthesis process is completed, the aqueous system of the polymers is directly In the reactor or transferred to other containers, from the temperature after the synthesis process to static, while cooling down, the polymer is separated from the water system and precipitated in the lower part of the container, and then the precipitated polymer is separated by physical methods The product is separated from water to obtain a concentrated aqueous polycarboxylate polymer product. Compared with the previous concentration methods using heating evaporation, depressurization evaporation or the combination of the two, the present invention has lower requirements on equipment, less energy consumption, simple production process, low cost and high water reduction rate.

The invention discloses a benzoic acid-containing wastewater treatment method. Benzoic acid-containing wastewater is treated by a regulating pond, a filter, a decompression and reuse acid steaming system and a Fenton and coagulation system through a biochemical oxidation process and an ozone oxidation process, so that high-index pollutants, such as refractory organic compounds, inorganic salt andchroma in the wastewater are removed efficiently; finally, the COD of the treated effluent is less than or equal to 100 mg / L; the chroma of the effluent is less than or equal to 75; the pH range of the effluent is 6 to 9.

The invention discloses a low-salt culture medium of Lactobacillus rhamnosus comprising a basic culture medium and an optimized culture medium, wherein that basic culture medium comprises yeast peptone, yeast powder, glucose, lactose, isomaltooligosaccharide, L-Malic acid, manganese sulfate, the balance of sterile water, pH 6.50-7.00. The optimized medium consistes of yeast peptone, yeast powder,glucose, lactose, isomaltooligosaccharide, L-Malic acid, citric acid, manganese sulfate, the balance of sterile water, pH 6.50-7.00. The culture medium is suitable for the propagation of Lactobacillusrhamnosus, and the number of viable bacteria in fermentation broth could reach more than 109 CFU / ml.

The invention relates to a purification method for glufosinate-ammonium. The method comprises the following steps that a glufosinate-ammonium hydrochloride crude product is dissolved into a solvent, then, alkaline is added to be subjected to a reaction, the pH value is adjusted to be 7-10, reduced pressure distillation is performed to remove some solvent, then filtering is performed to remove ammonium chloride and other undissolved substances; acid is added into the reaction solution to be subjected to a reaction, the pH value is adjusted to be 1-4.5, and then filtering and drying are performed to obtain glufosinate-ammonium acid; the glufosinate-ammonium acid is dissolved into the solvent, then, ammonia gas is introduced to be subjected to a salt forming reaction, glufosinate-ammonium solid is separated out, and filtering and drying are performed to obtain high-purity glufosinate-ammonium. According to the purification technology, fatty amine hard to remove and high-risk ethylene oxide and epoxypropane are prevented from being used, the steps are simple, the obtained glufosinate-ammonium is low in inorganic salt content and high in purity, yield and safety, water or alcohol is used as the solvent in the technological process, ammonium hydroxide and inorganic base are used for being subjected to a neutral reaction, the glufosinate-ammonium conforms to the environment-friendly and economical principle, and the good industrial prospect is achieved.