1124results about How to "Solving Recycling Problems" patented technology

The invention discloses recovery process of honeycomb type selective catalytic reduction (SCR) waste catalyst. The process includes the following steps: a, preprocessing the SCR waste catalyst and leaching at the high temperature and under high pressure; b, adding hydrochloric acid into leaching liquid, adjusting pH, and removing impurities; c, adding hydrochloric acid into the leaching liquid, reacting, calcining and preparing rutile titanium dioxide; d, preparing ammonium paratungstate; e, preparing ammonium metavanadate; and f, recycling and treating waste water. Main products of ammonium paratungstate, ammonium metavanadate and rutile titanium dioxide obtained in the process are high in purity and recovery rate. By-products of silicon magnesium slags, salty mud, high-concentration sodium chloride liquid and barium sulfate dregs are high-purity harmless useful goods. The process is free of harmful secondary pollutant emission, environment-friendly and capable of circulating, has high economical and social benefit and is practicable.

The invention discloses a magnetorheological finishing device for large-caliber aspheric optical parts. The magnetorheological finishing device comprises a machine tool, a finishing device, a magnetorheological finishing liquid circulating system for providing the finishing liquid with stable performance, and a control system connected with the components described above. The machine tool has four or more than four degrees of freedom. The finishing device is fixed on the machine tool and is positioned over the workpiece on the machine tool to be processed. The device has the advantages of simple and compact structure, low cost, simple control, wide range of application, and strong processing capacity, and is used for large-caliber aspheric optical parts.

The invention relates to a one-step molding method of a titanium silicalite molecular sieve. The method comprises the following steps of crystallizing the titanium silicalite molecular sieve subjected to hydro-thermal synthesis; directly adding a matrix substance, a binder, a peptizing agent and a pore-enlarging agent without separating, washing and calcining; pulping; performing spray forming; and calcining the formed microspheres to remove a template agent to obtain large formed titanium silicalite molecular sieve particles which can be applied to ammoximation of cyclohexanone and epoxidation of olefin.

The embodiment of the invention provides a garbage classification method, device and system. The problem that the garbage classification effect needs to be improved in the prior art is solved. The garbage classification method includes the steps that identity information of a user is verified and the user passing the verification is registered as a legal user; a garbage bag acquisition request sent by the user and the identity information of the user sending the garbage bag acquisition request are received; whether the user sending the garbage bag acquisition request is a legal user or not is judged, if yes, a garbage bag issuing permission control instruction is sent to a garbage bag issuing machine, and the garbage bag issuing machine issues garbage bags with class labels to the legal user; and control instruction execution feedback sent by the garbage bag issuing machine is received and a unique identification code is correlated with the identity information of the user sending the garbage bag acquisition request and then stored. By the utilization of the garbage classification method, device and system, user garbage classification convenience can be remarkably improved, implementation is convenient, and application and popularization are easy.

The invention provides a composite fiber material applied to visible light photocatalytic purification of sewage and air pollutants and a preparation method thereof. The composite fiber material is synthesized by loading a visible light response type bismuth-based photocatalytic material on a textile fiber material through a green chemical synthetic route. A powdered photocatalyst is solidly loaded by the unique net-like felt structure of the textile fiber material, so that the catalyst is prevented from losing and agglomerating during sewage treatment and air purification, and the separability and reusability are improved.

The invention discloses a novel technique for extracting L-tryptophan from fermentation broth, which includes the following steps that: fermentation broth is pretreated, and the treated liquid is pumped into a ceramic microfiltration membrane filter, so that tryptophan microfiltrate without mycelium and mycoprotein are obtained; the tryptophan microfiltrate is pumped into an ultrafiltration membrane filter, so that tryptophan ultrafiltrate and concentrated liquid containing pigment and protein are obtained; the tryptophan ultrafiltrate is pumped into a nanofiltration membrane filter, so that concentrated tryptophan liquid and permeate containing salt are obtained; waste filtrate is comprehensively utilized to produce protein feed; industrial ethylic acid is used for promoting low-temperature crystallization, crystallization mother liquid is treated by the ion exchange method and used, and after crystals are centrifugally dehydrated and dried, the L-tryptophan product is obtained. The invention solves the problem on how to recover industrial ethylic acid, and greatly increases the extraction rate of L-tryptophan; and since the filtrate and the mycoprotein are comprehensively utilized, the product profit is maximized. The total extraction rate of L-tryptophan is 85.2 percent, and the refined product meets the standards of Chinese Pharmacopoeia edition 2005.

The invention discloses a building exterior wall thermal insulation material. The building exterior wall thermal insulation material is formed by mixing a binding material, thermal insulation lightweight aggregate and a property-modifying additive according to the weight ratio of (40-85): (10-55):5. The building exterior wall thermal insulation material disclosed by the invention can be manufactured into wall thermal insulation mortar, thermal insulation blocks and thermal insulation boards, can be applied to different parts of a building, so as to ensure that the energy conservation index of the building meets the national mandatory standard, the fire rating can reach level A, and the drying shrinkage is low. A preparation process of the building exterior wall thermal insulation material is energy-saving, meanwhile, the recycling problem of industrial waste gypsum is solved, and the pollution of the industrial waste gypsum to the environment is avoided.

The invention discloses a method for preparing biodegradable polyester from consumed polyester. The method comprises the following steps of: reacting the consumed polyester and divalent alcohol under the action of a catalyst at the temperature of between 190 and 250 DEG C to decompose the polyester to a corresponding oligomer by the alcohol; adding aliphatic dibasic acid or esterification derivative of the aliphatic dibasic acid and acid or alcohol of multifunctional groups into the oligomer, and performing esterification reaction at the temperature of between 180 and 240 DEG C to obtain corresponding esterification products; and performing condensation polymerization reaction on the esterification products to obtain biodegradable aliphatic-aromatic copolyester. By the method, the consumed and reclaimed polyester material can be directly converted into a biodegradable polyester material, and a virtuous circle channel is provided for reclamation and utilization of non-degradable polyester white pollutants; and the biodegradable polyester material has excellent mechanical and processing properties.

The invention relates to a method for preparing high boiling silicone oil by using organic silicon high boiling substances, comprising hydrolyzation of alcohol and neutralization, wherein the organic silicon high boiling substances are hydrolyzed in the mixed liquid of alcohol and water and refluxed for 1-4 hours; nitrogen purging is carried out on the reactant, and then the reactant is added with hydrogen chloride dissolved in urea, zinc oxide and ammonium bicarbonate and in the system thereof. The invention integrally uses the organic silicon high boiling substances and lowers the chlorine content in silicon oil products, ensures the molecular weight and viscosity to be controllable and mass to be more stable; the usage of the neutralizing agent and latent solvent is reduced greatly, thus reducing the production cost; the process is simple and the industrial production is easy.

The invention discloses an inorganic antibacterial fiber of a coating layer and a preparation method thereof. The invention leads four-needle zinc oxide whisker that is blended with silver, ferric oxide, titanium dioxide or the mixture of the silver, the ferric oxide and the titanium dioxide to be modified, and expands the responsiveness of the four-needle zinc oxide whisker in the field of visible lights. The four-needle zinc oxide whisker or the modified four-needle zinc oxide whisker are loaded onto the fiber, and due to the special space structure, the four-needle zinc oxide whisker has strong holding power to the fiber and can be well loaded onto the fiber, thus well combining the high catalytic activity of the four-needle zinc oxide whisker and the high specific surface property of the fiber, greatly improving the catalytic efficiency of optical catalysts, and simultaneously solving the recycling problem of the optical catalysts.

The invention discloses a resource recycling method for waste lithium batteries. The resource recycling method comprises the following steps: soaking in a solution for discharging, breaking shells and distilling an electrolyte under a vacuum condition or an inert atmosphere protection condition, mechanically smashing, separating current collectors and electrode materials by using difference of density, adding acid to dissolve filtered and separated carbon material, adding base to recycle transition metal elements in cathodes, adding salt to recycle lithium element, and carrying out evaporation-recrystallization to recycle byproducts. The manner that a dry method is combined with a wet chemical technology realizes separation recycling of battery materials, the method is low in invested cost and few in energy consumption, a recycling method for environmentally hazardous lithium hexafluorophate and inflammable carbonic ester is highlighted particularly, and secondary pollution cannot be caused in the recycling process; and moreover, no organic solvent is used in the process, zero emission of waste liquid is realized, and the method is suitable for large-scale recycling production.

The invention discloses a method for separating a salt from coal-chemical-industry wastewater through an electroosmosis technique. The method for separating the salt from the coal-chemical-industry wastewater through the electroosmosis technique is characterized by comprising the following steps of firstly, carrying out pretreatment on raw water of the coal-chemical-industry wastewater, then introducing the wastewater subjected to the pretreatment into primary electroosmosis, so as to realize the separation between the salt and a COD (Chemical Oxygen Demand), afterwards, introducing thick water subjected to the primary electroosmosis into secondary electroosmosis to carry out concentration, and separating out sodium sulfate and sodium chloride from an obtained concentrated solution through post-treatment, thereby completing treatment. According to the method provided by the invention, by applying the characteristic that the salt can be separated and concentrated through electroosmosis, the COD and the salt in the coal-chemical-industry wastewater which is subjected to the pretreatment are separated; afterwards, the separated salt is concentrated; the difficult problems of the separation and the recovery of the salt in the coal-chemical-industry wastewater are solved; the sufficient utilization of a solid salt resource is realized; further, a whole technical process is free from the emission of pollutants and is green and environmentally-friendly; the zero emission, in a real sense, of the coal-chemical-industry wastewater can be realized.

The invention discloses a method for preparing a silica aerogel composite material by adopting a chloride-free and alcohol-free process. The method comprises the following steps: S1, adopting a water-based silicon source as a raw material, regulating the pH value of sol with a chloridion-free acid, adding an additive after desalting, and uniformly stirring to obtain a first mixed solution; S2, immersing a fiber reinforced material into the first mixed solution, and completing gel curing; S3, standing the obtained composite gel material so as to obtain an aged composite gel material; S4, placing the aged composite gel material in a chloride-free and alcohol-free displacer to realize uniform solution infiltration; S5, performing surface methylsilane modification on the composite gel by usinga chloride-free surface modifier; S6, drying the modified composite gel, thereby obtaining the silica aerogel composite material. The invention provides a method for preparing the silica aerogel composite material without any chloride ion or alcohol substance in the formula.

The invention discloses an organic waste desorption process, which comprises the following steps of: (1) adsorbing: cooling and filtering organic waste gas, and collecting into an adsorber through a gas collecting system for adsorbing; (2) desorbing: desorbing the organic waste gas through thermal nitrogen gas to obtain desorbed mixed gas; and (3) recovering: recycling the desorbed gas, wherein during adsorption, the temperature of the thermal nitrogen gas is 110-160 DEG C; and the adsorber is a fixed bed adsorber which takes active carbon particles as an adsorbent. Due to the adoption of the process for desorbing, the desorption efficiency is increased, the thermal nitrogen gas desorption efficiency can be up to 98 percent, the problems of steam desorption acid corrosion is solved, and the service life of equipment is greatly prolonged; the water content of a mixed solution is low, so that treatment is not required, the mixed solution can be directly applied to production, and the economic benefit of the recovering system is increased; nitrogen gas desorption is adopted, so that the service life of an adsorption material in a reaction container is prolonged, the production cost is lowered, and manpower and materials are saved; and meanwhile, the problem that solvents which are miscible and slightly soluble in water such as alcohols, ketones, esters and the like cannot be directly recovered through steam desorption is solved. The organic waste gas desorption process is suitable for the industries of printing, light industry, coating, chemistry, electronics and the like.

The invention discloses a method for recycling and preparing lithium iron manganese phosphate from positive electrode materials of waste lithium iron phosphate batteries. The method comprises the following steps: (1) discharging remnant electric quantities of the waste lithium iron phosphate batteries, disassembling the batteries, taking positive electrode sheets, washing, drying, roasting and separating lithium iron phosphate from aluminum foils; (2) by controlling the addition of acid, carrying out acid leaching on separated lithium iron phosphate, and filtering to separate insoluble iron phosphate and iron oxide to obtain a filtrate; (3) analyzing the filtrate, adjusting the molar ratio of the elements, namely, nLi to (nFe+Mn) to nP to 1: 1: 1 and adding a manganese source and a phosphorus source; and adjusting the pH to obtain a precipitate; drying the precipitate, adding a carbon source and mixing to obtain a pre-sintered material; and (4) carrying out solid sintering treatment on the pre-sintered material under non-oxidizing atmosphere to obtain the lithium iron manganese phosphate serving as the lithium ion battery positive electrode material. The method has the advantages of simplicity in process, environmental friendliness, good product properties and the like.

The invention provides a plasma fuel cell. An additional ion separation field with field direction which is vertical to running direction is arranged on a plasma flow operating path after a plasma jet generation unit; and corresponding collection structures are arranged on moving directions of separated cation and anion, wherein an electron collection structure is connected with an electric energy output circuit of an electron transfer circuit which is used for moving collected electrons out of the separation field; the electrons are transferred to a porous electrode structure which is on anion collecting side, is communicated with an oxygen introducing structure, and is isolated from the anions by a solid oxide electrolysis isolation structure; oxygen anions reduced by the electrons are combined with cations collected via isolation through the solid oxide electrolysis isolation structure to release converted electric energy to the outside. The cell can break electrostatic balance with feasibility, has a simple structure, can use various fuel gases and effectively recover fuel residual gas, does not need a noble metal catalyst or a biopolar plate so as to reduce the cost, and has the advantages of fast starting, large power and good loading adaptability.

The invention relates to a synthesis method of cefixime that is bacteriophage. 7-azyl-3-vinyl cephalosporanic acid (7-AVCA) is used as starting material to react with MICA active ester first, and an intermediate MECEF of cefixime is obtained through separation; the intermediate MECEF is directly hydrolyzed to generate a cefixime product without separation; the condensation and the hydrolyzation in a synthesis route of the cefixime product is combined into one. The synthesis method has the advantages that the technologcial conditions are simple, the operation is convenient, the product yield is high, the product quality is stable, and the method is suitable for the large-scale industrialized production; two-step reactions are combined into one, an intermediate A is not needed to be separated, the operation is simplified, and the production period is shortened; the yield can reach 200 to 212 percent; the purity quotient is more than 99 percent; the curative effect of the product is increased. Expensive tetrahydrofuran which is used in the reaction is replaced by low-cost acetone, the problem that tetrahydrofuran is mixed with the other reaction solvent and cannot be recycled and reused is solved, the wastewater discharge is reduced, the manufacture cost is lowered, and the competitive ability of the product is increased.

The invention relates to an underwater platform cable throwing device with a buoy. When the cable throwing device is in a non-triggered state, a bottom plate is attracted by an electromagnet assembly,and a cable and a buoy assembly are located in a cable storage cavity; when the buoy assembly needs to be taken back on a platform or released at the indication position, the electromagnet assembly instantly loses the restraint on the bottom plate, at the moment, a spring pushes a top plate to move in the axial direction of the cable storage cavity under the effect of resilience, and the cable and the buoy assembly are thrown out of the cable storage cavity. The buoy assembly and the cable are gradually spread in air and fall and float on water after being thrown out of the cable storage cavity, and a GPS and a beacon module in the buoy assembly send a position indication signal to a mother ship. By means of the cable throwing device, the problems of taking back, safety guaranteeing and positioning of various underwater platforms can be solved.

A phase-transfer catalyst for controlled of oxidizing reaction has a chemical formula: QmHnXMpO4+3 or QmMO3(L). It is not soluble to reaction mediumd but can become the active substance soluble in reaction medium under the action of one reactant to further act on anothe reactant for selective reaction. When one of the reactants is consumed off, the catalyst can restore its initial structure and be educed out for cyclic use.

The invention discloses a method for preparing epoxy chloropropane with the oxidation of chloropropene. The chloropropene, a solvent and fine particles of titanium silicate molecular sieve catalyst are put into a reaction pot and a hydrogen dioxide solution is added at 10 DEG C to 80 DEG C. The method is characterized in that a reaction is carried out under a subacidity condition and after the reaction, materials pass through an intermediate tank for oil-water dissociation to be divided into oil phase and water phase; the oil phase is sent into a rectifying tower for separating the chloropropene and ECH. After the water phase is filtered, a catalyst filter cake is washed by the solvent, regenerated or applied to an epoxidation reaction after being directly beat with the solvent. The ECH is extracted from an aqueous layer after filtration by the chloropropene. An extracted oil layer and an oil layer obtained from the separation of a reaction solution are combined and rectified, or the extracted oil layer is applied to the epoxidation reaction; water left from the extraction is rectified for recycling methanol and applied to the preparation of catalysts; and the method has simple procedures, small consumption amount of solvents, high separation yield of reaction products and easy realization of industrialization.

The invention provides a preparation method of a nano-composite fiber material. The preparation method includes the steps of (1), dispersing multiple functional nanoparticles into an organic solvent so as to form functional nanoparticle suspension; (2), providing a fusion-state organic polymer carrier material; (3), spraying the functional nanoparticle suspension on the fusion-state organic polymer carrier material so as to enable the functional nanoparticles to be attached to the surface of the fusion-state organic polymer carrier material; (4), curing a fusion-state organic polymer carrier material obtained from the step (3) so as to obtain the nano-composite fiber material. The invention further provides the nano-composite fiber material prepared by the preparation method. The nano-composite fiber material has the advantages that the functional nanoparticles can be effectively loaded on the organic polymer carrier material, so that high-capacity functional nanoparticle load can be achieved; the nano-composite fiber material can be applied to the environment-friendly fields of wastewater purification, air purification, bacterium resistance, disinfection and the like.