46results about How to "Reduce post-processing burden" patented technology

The invention discloses a method for treating antibiotic wastewater and belongs to the field of wastewater treatment. The treatment method comprises the following steps: pre-treatment, hydrolysis and acidification, bioaugmentation-based first-stage treatment, Fenton oxidation and biological advanced treatment. The method is applied to treat wastewater from antibiotic production, works with high efficiency, ensures that the effluent quality is safe and stable and meets the requirements listed in the water quality standard GB / T18920-2002, and can achieve the purposes of beneficial cycle of water resources and green production in enterprises.

The invention relates to a farmland nitrogen and phosphorous non-point source pollution control and recycle system, and a method thereof. The system comprises a water collector, an adsorption unit and a water store which are sequentially arranged from the upstream to the downstream according to farmland surface runoff and underground runoff paths. The water collector, the adsorption unit and the water store are sequentially transversely arranged according to the farmland surface runoff and underground runoff paths, so when rain falls or irrigation is carried out, the farmland water is surplus, meets in the water collector through the farmland surface runoff and underground runoff, the water in the collector continuously downward flows and goes through the adsorption unit, nitrogen (N) and phosphorous (P) are adsorbed, the purified farmland drainage enters the water store, and the superfluous purified drainage is discharged to a river and a lake; and when farmland recharging is carried out, the water which reversely flows goes through the adsorption unit for the N and P desorption, and the desorbed N and P enter the water collector with the water flow, afresh enter the farmland and are adsorbed and utilized by crops. Compared with the prior art, the method has the advantages of pollution control, recycle, fertilizing cost saving and the like.

A biological degradation method of thick oil wastewater in an oil field relates to a degradation method of thick oil wastewater in an oil field. Aiming at the problem that the prior treatment process of the thick oil wastewater excessively depends on a flocculating agent, thereby generating a large quantity of oily sludge to bring larger burden and effect on subsequent treatment; and aiming at the problems that the floor area of the thick oil wastewater processed by adopting an anaerobic and aerobic biological method is large; the flow is complicated; the working condition is difficult to control; and the treatment effect is not ideal simultaneously, the method is realized by the following five steps: oil separation treatment, coalescent oil removal, sand filtration tank treatment, hydrolytic acidification treatment and aeration biological treatment; and raw water in a coalescent oil remover flows through a mesh-shaped filling coalescent unit, a subcritical flow chamber and an oil removal unit in sequence to be subjected to oil removal treatment; and the raw water after entering into an aeration biological tank flows through an anaerobic zone and an aerobic zone in sequence. The complete process of the method has the advantages of no secondary sedimentation tank and flocculating agent, compact structure, small floor area, simple flow, easier control of working condition, good effluent water quality and ideal processing effect, thereby realizing the standard discharge of the thick oil wastewater.

The invention relates to environment-friendly equipment and functional equipment for a sewage diversion process, in particular to a sewage diversion trench suction filter system. The sewage diversion trench suction filter system comprises a bracket, two main rollers, filter cloth belts, a water collecting groove, a vacuum box and a water inlet groove, wherein the two main rollers are arranged at two end parts of the bracket; the filter cloth belts are sleeved on the two main rollers; the water collecting groove is arranged between the two main rollers; the vacuum box is arranged on one side of the water collecting groove; the water inlet groove is arranged above the water collecting groove; and the two main rollers are driven by a motor. By adoption of the structure, the sewage diversion trench suction filter system can remove large-particle solid pollutant (comprising suspended matters and floating matters) from sewage and can reduce sludge quantity of the sewage greatly. By the sewage diversion trench suction filter mechanism, large particles and the suspending matters difficult to settle can be removed from the sewage through suction filtering, COD (chemical oxygen demand) can be reduced by over 50-60 percent, the burden of the subsequent treatment is greatly reduced, biochemical time can be shortened, and the volume of a functional pool can be reduced.

The dyeing and striking-off process with soft bag includes the following steps: setting spread cloth or yarn to be dyed inside one soft waterproof bag; injecting dye solution in proper amount into the bag; sealing the mouth of the bag to maintain the dye solution inside the bay and to form dyeing and striking-off bag; stretching the dyeing and striking-off bag with some fixture, and turning and driving the bag to make the dye solution flow inside the bag to penetrate cloth fiber for homogeneous dyeing. The dyeing and striking-off apparatus includes dyeing and striking-off bag, bearing stage for the bag to be set on and fixed, and dyeing machine with support frame, spraying unit, sliding unit, driving unit, hot water tank, cold water tank and airtight door. The present invention has the advantages of homogeneous dyeing, saving in dye solution, low cost and no pollution.

The invention discloses an alkali silicate glass frit, a zirconium frit opaque glaze, a zirconium raw material opaque glaze, and preparation methods of the zirconium frit opaque glaze and the zirconium raw material opaque glaze. The preparation methods are ceramic glazing methods. Main raw materials of the zirconium frit opaque glaze comprise frits prepared from waste silica gel and sodium carbonate, wherein utilization amounts of waste silica gel and sodium carbonate satisfy a SiO2-Na2O mole ratio of (2 to 3): 1. Waste silica gel and other raw materials are directly prepared into pulp and then are sintered into the zirconium raw material opaque glaze. The zirconium frit opaque glaze and the zirconium raw material opaque glaze are prepared from raw materials of zirconium-containing waste silica gel (which is short for waste silica gel), and residual zirconium of the raw materials is utilized as an opacifier, and thus the problems of waste silica gel storage and environmental pollution are solved. The types of the used raw materials are reduced. An opaque glaze production cost is reduced. In preparation, waste silica gel can be directly used without physical and chemical treatment. The zirconium frit opaque glaze and the zirconium raw material opaque glaze are convenient for industrial application, and have performances satisfying general requirements.

The invention discloses a synthesis method of butanedione. According to the synthesis method, a salicylaldehyde derivative reacts with compounds of diamine to generate a schiff base ligand, then coordination with a transition metal salt solution is conducted to prepare metal schiff base complexes, then an F-C acylation reaction is conducted, the metal schiff base complexes are immobilized in a polystyrene microsphere carrier containing an acyl group to be prepared into an immobilized catalyst, and finally acetoin serves as a raw material and is added to the immobilized catalyst, air is introduced for catalytic oxidation, and the butanedione is obtained. According to the synthesis method, the F-C acylation reaction is conducted, the metal schiff base complexes are immobilized in the polystyrene microsphere carrier containing the acyl group, the immobilization rate of the immobilized metal schiff base complexes is raised through chemical bonds, posttreatment of a product obtained through the immobilized catalyst is simple, and the yield of is high; besides, the adopted raw material is the acetoin, production cost is lowered for enterprises producing the acetoin, product diversity is increased, and enterprise competitiveness can be improved.

The invention relates to a selenium-rich biological agent for improving the activity of microbes in soil. The selenium-rich biological agent comprises the following raw materials: 8-15 parts of sodium selenite, 5-15 parts of compound trace elements, 8-20 parts of monopotassium phosphate, 10-25 parts of urea, 8-20 parts of peptone, 4-10 parts of yeast powder, 8-20 parts of NaCl, 8-15 parts of NaOH, 4-10 parts of NaNO3, 10-25 parts of NaCl, 4-10 parts of NH4Cl, 8-20 parts of K2HPO4, 4-10 parts of a beef extract, 10-25 parts of glucose, 10-25 parts of starch, 8-20 parts of calcium carbonate, 10-25 parts of amino acid, 2-6 parts of potassium nitrate, 2-6 parts of ferrous sulfate, 10-25 parts of magnesium sulfate, 25-40 parts of trisodium citrate, 10-25 parts of enzymes and 800-896 parts of excess activated sludge. The selenium-rich biological agent adopts excess activated sludge produced by treatment of domestic sewage, so that not only is the fermentation speed of the selenium-rich biological agent increased, but also the particle diameters of selenium nano-particles are more uniform, and absorption of the selenium-rich biological agent by plants is benefitted.

The invention discloses a culture method for reducing emission of nitrogen and phosphorus from pig raising and application. The method comprises the step of feeding growing and fattening pigs by adopting a manner of mixing green feed and fine feed, wherein the green feed provides 30-35 percent of the acceptable daily intake of crude protein every day for the feeding growing and fattening pigs, and the fine feed provides 65-70 percent of the acceptable daily intake of the crude protein every day for the feeding growing and fattening pigs. The fine feed is commercial pig feed, the green feed is made from sweet potato stems, melon vines or wild water spinach usually planted in the farmland, and the water content of the green feed is 80-90 percent by mass. The method can effectively reduce the content of main pollutants in waste and excrements, has a little influence on the weight increase of the growing and fattening pigs, realizes the pollution and emission reduction of the pig breeding industry, and can save the breeding cost and improve the economic benefit.

The invention discloses a preparation method of trimethyl silylcyanation (TMSCN), which comprises in organic solvent, using halogenated trimethyl silane and potassium ferrocyanide as raw materials and using silver cyanide-polyethylene-potassium iodide as catalyst to react for 2-12h at 40-200DEG C to prepare trimethyl silylcyanatio, wherein the mol ratio of halogenated trimethyl silane, potassium ferrocyanide, silver cyanide, polyethylene and potassium iodide is 1:0.1-1:0.01-0.1:0.01-0.1:0.01-0.1. The preparation method uses easily accessible potassium ferrocyanide as the resource of cyanide group, to avoid toxic cyanide as sodium cyanide and potassium cyanide or the like, reduce waste acid, dangerous operation and reduce the load on following treatment. The invention is simple, mild and green, which is suitable for preparing trimethyl silylcyanation in large scale.

The invention belongs to the field of chemical industry and discloses a method for preparing 2-cyano-3,6-dichloropyridine, which comprises the following steps: in an organic solvent, using 2,3,6-trichloropyridine and potassium ferrocyanide as raw materials, sodium carbonate and palladium diacetate as catalysts, and reacting for 2-20 hours at 40-200 DEG C under the protection of inert gases to prepare the 2-cyano-3,6-dichloropyridine, wherein the mol ratio of 2,3,6-trichloropyridine to potassium ferrocyanide to sodium carbonate to palladium diacetate is 1:0.1-1:0.1-1:0.001-0.01. The method usesthe potassium ferrocyanide which is convenient and easy to obtain as the source of cyanogens so as to avoid using the virulent cyanides, reduce the hazard of waste acids and the operational danger and also reduce the load for post-treatment. The method has the advantage of simpleness, mildness and environmental protection and is suitable for industrial production.

The invention discloses a method for preparing cyanopyridine by using chloropyridine under the catalysis of ligand-free palladium, and the method comprises the following steps: in the organic solvent,adopting chloropyridine and potassium ferrocyanide as raw material and potassium carbonate-palladium acetate as catalyst to react at 40-200 DEG C for 2-20h under the protection of inert gas and obtaining cyanopyridine. The method that cyanopyridine is prepared through the catalysis of ligand-free palladium adopts accessible potassium ferrocyanide as source of cyano group so as to avoid the use ofvirulent cyanides such as sodium cyanide, potassium cyanide and the like, reduce the damage of waste acid and the operational hazard, lower the post-treatment load and not need to add expensive phosphine ligand. The operation is simple, thus being applicable to the large-scale production of cyanopyridine compounds.

The invention discloses a method for treating chemical wastewater containing nitrogen heterocyclic compounds, belonging to the field of wastewater treatment. According to the invention, through the combined pretreatment of an electrolysis generating tank and an electrolysis reaction tank, the nitrogen heterocyclic compounds are subjected to ring-opening chain scission to reduce biological toxicity, heterocyclic organic nitrogen is completely converted into ammonia nitrogen, and continuous release of the ammonia nitrogen in the subsequent biological treatment process is avoided; and then anaerobic biological treatment and biological denitrification reaction systems are combined for treatment. The method has the advantages of strong load impact capability, easy operation and control and lowoperation cost, and especially has good treatment effect on chemical wastewater containing nitrogen heterocyclic compounds.

The invention provides a method for treating chrome tanning wastewater, and belongs to the technical field of wastewater treatment. The method comprises the steps: performing grid impurity removal, performing adjustment through addition of alkali, performing wastewater sedimentation, and performing adjustment through addition of acid, wherein wastewater sedimentation is performed through a flocculating agent, and the flocculating agent comprises an amphoteric polymer chelating flocculant PDMAMDTC and a chitosan-derived adsorption material; and preparation of the chitosan-derived adsorption material comprises the following steps: dispersing triethylene tetramine and chitosan in an acetic acid solution, then adding a cross-linking agent for a reaction, and then performing washing and drying,and the cross-linking agent contains glutaraldehyde, triethanolamine and 3-mercaptopropionic acid. According to the method for treating the chrome tanning wastewater, a short reaction period of timeis required, the efficiency of decontamination and impurity removal is high, full recycling and utilization of resources are achieved, and the cost of production and treatment is reduced effectively;and the flocculating agent has the advantages of a high degree of reaction completion, low surface energy, high cationic degree, high intrinsic viscosity, large ion adsorption capacity, strong net trapping ability and good performance of flocculation and sedimentation.

The invention discloses an efficient denitrification treatment method for landfill leachate, and relates to the technical field of landfill leachate treatment. The efficient denitrification treatmentmethod specifically comprises: grid separation, anaerobic treatment, A / O system treatment, MBR treatment and subsequent treatment. According to the invention, the front-end pretreatment and biologicaltreatment technical method in the traditional process is improved, pretreatment, anaerobic treatment and aerobic treatment are combined without adding chemicals, and the stabilization of leachate front-end treatment is realized by utilizing the principles of denitrification anaerobic methane oxidation, short-cut denitrification and anaerobic ammonia oxidation, so that the organic load is reducedto a great extent, the ammonia nitrogen removal efficiency is improved, the nutrient ratio of carbon to nitrogen to phosphorus is balanced, the subsequent treatment burden is reduced, and the treatment difficulty is reduced.

The invention discloses an energy-saving double-circulation unpowered automatic mixing Fenton reactor comprising a reactor shell, a base for supporting the whole reactor shell and an water inlet pump, wherein the top of the reactor shell is provided with an effluent weir; a reactive precipitation chamber, a reaction chamber and a mixed reaction chamber are sequentially arranged from top to bottom in the reactor shell; the mixed reaction chamber is internally provided with a diffusion system; the bottom of the reactor shell is provided with a dosing tube extending into the diffusion system; two shell walls of the reaction chamber are provided with external return pipes connected with the water inlet pump; the upper end of the water inlet pump is provided with a water inlet pipe which is communicated with the external return pipes and is provided with an acid adding system; an injection system is arranged between the water inlet pump and the diffusion system, one end of the injection system extends into the diffusion system, and the other end of the injection system is connected with the water inlet pump through a pipeline. The energy-saving double-circulation unpowered automatic mixing Fenton reactor is compact in structure, small in floor area and capable of realizing sufficient mixed reaction and sediment separation through combining double circulations in the reactor and external circulation.

The invention discloses a method for synthesizing 2-cyano-3,6-dichloropyridine. The method comprises the following steps of: taking 2,3,6-trichloropyridine and potassium ferrocyanide as raw materials and silver iodide-polyethylene glycol-potassium iodide as a catalyst, and putting the raw materials and the catalyst in an organic solvent for reaction for 2 to 12 hours at a temperature of between 40 and 200 DEG C to synthesize the 2-cyano-3,6-dichloropyridine, wherein the reaction molar ratio of 2,3,6-trichloropyridine, potassium ferrocyanide, silver iodide, polyethylene glycol and potassium iodide is 1:0.1-1:0.01-0.1:0.01-0.1:0.01-0.1. In the method, the 2-cyano-3,6-dichloropyridine is prepared by selecting a safe and cheap cyano group source and under reaction conditions of mildness, greenness and high efficiency, so that the method has big actual application values.

A contaminated soil in-situ circulation leaching treatment method adopting an electrochemical treatment leacheate comprises the following steps that firstly, an electrochemical reactor is arranged on a contaminated soil ground, the upper portion of the chemical reactor is open, the leacheate enters from the upper portion, and the upper portion of the chemical reactor is open; the bottom of the electrochemical reactor is communicated with a leacheate discharge pipe network arranged in the polluted soil through a discharge pipe; 2, after entering the contaminated soil, the leacheate absorbs pollutants in the soil and then is enriched in a water collecting well, and then the leacheate in the water collecting well is sent back into the electrochemical reactor through a sewage pump, so that circulation of the leacheate is achieved; and step 3, after the leacheate is circulated stably, electrifying the positive electrode plate and the negative electrode plate to enrich heavy metal ions in the leacheate and degrade organic pollutants so as to realize efficient circulating operation of the leacheate. The leacheate subjected to electrochemical treatment enters the leacheate discharge pipe network system below again, so that efficient cyclic utilization of the leacheate is realized.

The invention relates to a program special information (PSI) data filter for a set-top box demultiplexing system and a filtering method of the data filter. The filter comprises a master controller of a state machine, a TS (Transport Stream) code stream input buffer, a comparison logical processor and a TS code stream output buffer, wherein the master controller of the state machine is used for controlling the conversion of the state machine of the PSI data filter, and the comparison logical processor is used for carrying out comparison and filtering processing on PSI data in a TS grouped data packet and feeding a processing result back to the master controller of the state machine. The invention further relates to a method for realizing PSI data filtering in the set-top box demultiplexing system based on the filter. By adopting the PSI data filter, with the structure, for the set-top box demultiplexing system and the filtering method of the data filter, the efficiency of the reading and calculating of data can be greatly increased, the filtering processing on PSI is completed accurately, and the subsequent processing burden of a central processing unit is lightened greatly, so that the PSI data filter and the filtering method thereof have a wide range of application.

The invention discloses a method for preparing cyanopyridine by using chloropyridine under the catalysis of ligand-free palladium, and the method comprises the following steps: in the organic solvent, adopting chloropyridine and potassium ferrocyanide as raw material and potassium carbonate-palladium acetate as catalyst to react at 40-200 DEG C for 2-20h under the protection of inert gas and obtaining cyanopyridine. The method that cyanopyridine is prepared through the catalysis of ligand-free palladium adopts accessible potassium ferrocyanide as source of cyano group so as to avoid the use of virulent cyanides such as sodium cyanide, potassium cyanide and the like, reduce the damage of waste acid and the operational hazard, lower the post-treatment load and not need to add expensive phosphine ligand. The operation is simple, thus being applicable to the large-scale production of cyanopyridine compounds.

The invention discloses a method for treating antibiotic wastewater and belongs to the field of wastewater treatment. The treatment method comprises the following steps: pre-treatment, hydrolysis and acidification, bioaugmentation-based first-stage treatment, Fenton oxidation and biological advanced treatment. The method is applied to treat wastewater from antibiotic production, works with high efficiency, ensures that the effluent quality is safe and stable and meets the requirements listed in the water quality standard GB / T18920-2002, and can achieve the purposes of beneficial cycle of water resources and green production in enterprises.

The invention discloses a culture method for reducing emission of nitrogen and phosphorus from pig raising and application. The method comprises the step of feeding growing and fattening pigs by adopting a manner of mixing green feed and fine feed, wherein the green feed provides 30-35 percent of the acceptable daily intake of crude protein every day for the feeding growing and fattening pigs, and the fine feed provides 65-70 percent of the acceptable daily intake of the crude protein every day for the feeding growing and fattening pigs. The fine feed is commercial pig feed, the green feed is made from sweet potato stems, melon vines or wild water spinach usually planted in the farmland, and the water content of the green feed is 80-90 percent by mass. The method can effectively reduce the content of main pollutants in waste and excrements, has a little influence on the weight increase of the growing and fattening pigs, realizes the pollution and emission reduction of the pig breeding industry, and can save the breeding cost and improve the economic benefit.

The invention relates to the technical field of wastewater treatment, and concretely relates to a solid-liquid separation process for fluorescent whitening slurry wastewater. According to the solid-liquid separation process for the fluorescent whitening slurry wastewater, the fluorescent whitening slurry wastewater can be economically and effectively subjected to solid-liquid separation, COD in liquid is greatly reduced, and the post-treatment burden of the liquid part is reduced; and post-treatment of the solid part is simplified. The process is simple, solid-liquid separation is thorough, and the operation cost is low.

The invention provides an efficient oil-water separation waste liquid treatment method, which comprises the following steps: after being produced in the production process, the waste liquid is guided and conveyed into a collection container through a pipeline, the waste liquid slowly flows in the collection container to stand, solid particles sink to the bottom when the waste liquid is in the standing state, oily liquid floats to the top layer, the left middle part is an aqueous solution, the oily liquid on the top layer is independently guided, discharged and concentrated, the aqueous solution on the middle layer is guided into a circulating purification device, the water content of the aqueous solution is larger than or equal to 85%, the mass ratio of solid particles is smaller than or equal to 5%, the mass ratio of the oily liquid is smaller than or equal to 10%, the aqueous solution generates purified water in the circulating purification device, the rest part is circularly filtered, and the final high-concentration waste liquid is intensively collected. According to the scheme, the filtering effect of the waste liquid is improved by adopting a mode of early-stage standing and circulating purification.

The invention relates to a farmland nitrogen and phosphorous non-point source pollution control and recycle system, and a method thereof. The system comprises a water collector, an adsorption unit and a water store which are sequentially arranged from the upstream to the downstream according to farmland surface runoff and underground runoff paths. The water collector, the adsorption unit and the water store are sequentially transversely arranged according to the farmland surface runoff and underground runoff paths, so when rain falls or irrigation is carried out, the farmland water is surplus, meets in the water collector through the farmland surface runoff and underground runoff, the water in the collector continuously downward flows and goes through the adsorption unit, nitrogen (N) and phosphorous (P) are adsorbed, the purified farmland drainage enters the water store, and the superfluous purified drainage is discharged to a river and a lake; and when farmland recharging is carried out, the water which reversely flows goes through the adsorption unit for the N and P desorption, and the desorbed N and P enter the water collector with the water flow, afresh enter the farmland and are adsorbed and utilized by crops. Compared with the prior art, the method has the advantages of pollution control, recycle, fertilizing cost saving and the like.

The invention discloses capillary wastewater treatment and desalination equipment and a method. Capillary-like tubes which are arranged in order and are uniformly arranged are arranged inside the equipment, and the equipment consists of a concentrated water area, a submersion area, a vapor-water mixing area, a top vacuum area and a clean water area; the top vacuum area and the clean water area communicate with each other through capillary-like tube connection, and the concentrated water area is provided with a salt draining passage and is completely isolated from the bottom clean water area; microwave and ultrasonic devices are arranged outside; organic matters are degraded and removed under the action of microwave energy and ultrasonic energy; a vacuumizing device and an exhaust gas filtering device are arranged at the top of the equipment, the vapor-water mixing area maintains a certain negative-pressure state, pressure difference is formed between the inside and outside of the capillary-like tubes, and water molecules enter the tubes and flow into the clean water area under the action of the pressure difference; and formed concentrated water enters the concentrated water area, and the concentrated water and precipitated salts are discharged out of the equipment through a discharge pipe. According to the equipment, organic matter and salt removing systems are integrated, and the equipment is applicable to high-salt high-concentration organic wastewater of different types.

The invention discloses an emergent disposal method for soil polluted by a filter solution of chromium slags. The emergent disposal method comprises the following steps: step I, firstly, determining the initial concentration range of total chromium in the filter solution of chromium slags on the surface of soil, when the content of the total chromium in the filter solution of chromium slags, to be disposed, is too high, diluting the filter solution of chromium slags on the surface of the soil in advance by adopting a water-dilution method, wherein the concentration is controlled within 0.157-52.3mg / L; step II, adding a dry coal ash-CaO mixing agent in the filter solution of chromium slags in the step I, and controlling the ratio of solid to liquid within 2.5-7:50; step III, sufficiently mixing the filter solution of chromium slags and the coal ash-CaO for 7-24 hours at the stirring speed of 100-300r / min. The emergent disposal method disclosed by the invention is simple to operate, low in price, small in pollution, and free from energy consumption, so that subsequent disposal burden for chromium mud is relieved; therefore, a foundation for the resource utilization of coal ash is laid.

The invention discloses a tire cord production wastewater treatment system and a treatment process thereof. The tire cord production wastewater treatment system comprises an adjusting tank, a demulsification sedimentation tank, an electrocatalytic oxidation device, an intermediate water tank and an aerobic tank, wherein a water outlet of the adjusting tank is connected with a water inlet of the demulsification sedimentation tank through a pump; a water outlet of the demulsification sedimentation tank is connected with a water inlet of the electrocatalytic oxidation device through a pipeline; awater outlet of the electrocatalytic oxidation device is connected with a water inlet of the intermediate water tank through a pipeline; and a water outlet of the intermediate water tank is connectedwith a water inlet of the aerobic tank through a pump. According to the method, high-content and difficult-to-biologically treat even toxic macromolecules can be effectively converted into micromolecular organic matters, so that the biodegradability of the wastewater is improved; meanwhile, the process is short, the treatment cost is low, and the stable and efficient treatment of the tire cord production wastewater is realized.

The present invention discloses a method for preparing amidosulfone and preparing N-substituted imine by using said amidosulfone. The method for preparing amidosulfone is characterized by that in water or mixed solution of water and organic solvent said method utilizes the action of protonic acid to make aldehyde, acylamide and sulfinate undergo the process of condensation reaction so as to form the amidosulfone, and the method for preparing N-substitute imine includes the following steps: adopting the above-mentioned amidosulfone and making it be reacted in the double-phase medium formed from organic phase and alkali-containing water phase, using alkali to remove sulfinic acid from amidosulfone to form N-substituted imine, separating organic phase to obtain said product and separating water phase to recover sulfinate.