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30results about How to "Realize green recycling" patented technology

Magnetic photocatalysis resource recycling type artificial adsorption floating bed

The invention provides a magnetic photocatalysis resource recycling type artificial adsorption floating bed which is formed by stacking a photocatalysis layer, a magnetic nitrogen removal adsorption layer and a magnetic phosphorus removal adsorption layer sequentially from top to bottom, wherein the photocatalysis layer suspends over the water surface; and the magnetic nitrogen removal adsorption layer and the magnetic phosphorus removal adsorption layer are immerged in the water surface. The magnetic photocatalysis resource recycling type artificial adsorption floating bed provided by the invention can be thrown for use simply and does not need artificial maintenance at ordinary times; the secondary function recovery can be realized through simple water flushing and sunlight exposure and secondary spraying; and the waste matrix material such as sludge and straw is prepared by the technical means such as exposure and ultrasonic dispersion without addition of any chemical raw materials which can cause secondary pollution, and new environmental pollution is avoided. The magnetic photocatalysis resource recycling type artificial adsorption floating bed has the advantages that the investment cost is low, secondary pollution is avoided, the resource utilization and green recycling of the industrial and agricultural wastes are realized by consuming the sludge of river channels.
Owner:张焕林 +3

Equipment and method for thermal removing of paint layers of waste metals

The invention relates to equipment and a method for thermal removing of paint layers of waste metals. The removing equipment comprises a feed bin (1), a feed inlet (2), a gate valve 1 (3), a valve 1 (4), an isolation bin 1 (5), a valve 2 (6), a gate valve 2 (7), a valve 3 (8), a heating furnace (9), a furnace tube (10), a mechanical pump (11), a valve 4 (12), a gate valve 3 (13), an isolation bin 2 (14), a valve 5 (15), a valve 6 (16), a gate valve 4 (17) and a base (18). The equipment has the functions of carrying out drying and pollution-free thermal paint removing on the waste metals containing the paint layers. The method for removing the paint layers on the surfaces of the waste metals, disclosed by the invention, comprises the steps of material drying and controllable oxygen partial pressure rotary continuous thermal paint removing. The equipment and the method, disclosed by the invention, have the characteristics of heating uniformity, high paint removing efficiency and no pollution and can be widely applied to waste metal recovery.
Owner:UNIV OF SCI & TECH BEIJING +1

A Tetra package recovered PE/PLA wire used for 3D printing and a preparing method thereof

A Tetra package recovered PE / PLA wire used for 3D printing and a preparing method thereof are disclosed. The wire is prepared from, by weight, 50-94% of Tetra package recovered PE, 3-42% of PLA, 0.1-8% of a compatilizer, 0.01-2% of a fluorine-containing processing auxiliary agent, and 0.01-2% of white oil. The method includes (1) drying, (2) material weighing, (3) high-speed kneading, (4) melting and extrusion, (5) cooling and traction and (6) rolling and bundling. Low density polyethylene (simplified as the Tetra package recovered PE) which is prepared through separating waste paper plastic aluminum packages of beverage, milk, and the like and the polylactic acid (PLA) are blended to prepare the polymer wire suitable for 3D printing. Green cyclic reutilization of polymer materials is achieved, the application range of the Tetra package recovered PE is broadened, and the novel wire for 3D printing is provided.
Owner:FUJIAN NORMAL UNIV

Green intelligent concrete curing system and curing method

The invention provides a green intelligent concrete curing system and a curing method, and belongs to the technical field of concrete curing. A plurality of internal circulation curing pipelines and external circulation curing pipelines which are communicated with a water tank are respectively arranged inside and at the top of the concrete structure, after the internal circulation curing pipelinescure the interior of the concrete structure for a period of time, the water temperature of the water tank rises, the external circulation curing pipelines work, warm water in the water tank is sprayed to the surface of the concrete structure through a shower head for external circulation curing. Warm water curing is beneficial to improving the strength of concrete, relieving the difference between the atmospheric temperature and the surface temperature of the concrete structure, achieving cyclic utilization of water in the water tank, achieving green cyclic utilization of hydration heat and saving resources. A temperature detection device is further pre-buried in the concrete structure, opening and closing of the internal circulation curing pipeline can be adjusted in real time accordingto the temperature conditions of different temperature measurement points in concrete, the whole curing process is more flexible, accurate and intelligent, and the curing effect is better.
Owner:THE THIRD CONSTR OF CHINA CONSTR EIGHTH ENG BUREAU

Building color sand, method for preparing same and application of building color sand

The invention discloses building color sand, a method for preparing the same and application of the building color sand. The method includes uniformly mixing batch mixtures, adhesive and quartz sand with one another; roasting the batch mixtures, the adhesive and the quartz sand at the temperature of 740-880 DEG C, coating the quartz sand with the batch mixtures and coloring the quartz sand by thebatch mixtures to form the building color sand. The batch mixtures comprise waste glass, borax, antimony white and inorganic colorants. The building color sand, the method and the application have theadvantages that color sand raw materials with the waste glass are sintered at the high temperature in an all-inorganic manner to prepare the building color sand, and accordingly the waste glass can be recycled in a green manner; the building color sand prepared by the aid of the method mainly can be applied to building external walls and also can be used for color tiles for buildings, interior decoration and the like.
Owner:BEIJING UNIV OF TECH

Preparation method of bupropion hydrochloride

The invention discloses a preparation method of bupropion hydrochloride. M-chlorophenylacetone is used as a raw material to take bromination reaction with sodium bromide, sulfuric acid and hydrogen peroxide in a water-halohydrocarbon solvent to prepare a brominated intermediate; then the prepared bromide reacts with tert-butylamine to prepare amfebutamone, after the reaction for preparing amfebutamone is completely reacted, the water is directly added, after a reaction solution is layered, the layered organic layer is cleaned and distilled to obtain amfebutamone, and obtained amfebutamone is acidified by virtue of isopropanol hydrochloride to obtain bupropion hydrochloride; and the peparation process of amfebutamone, the alkalinity of a water layer obtained after the layering of the reaction solution is adjusted by using sodium hydroxide, after tert-butylamine is recovered in a distillation manner, the water layer comprising bromine ions is concentrated, the pH value is adjusted to beneutral by using sulfuric acid, the obtained aqueous solution comprising sodium bromide is used for taking the bromination reaction again so as to be circularly utilized. By adopting the preparation method, the environment-friendly circular utilization of bromine is realized, and the production cost is reduced.
Owner:SHAOXING UNIV YUANPEI COLLEGE +1

Green recycling method of waste lithium iron phosphate battery positive electrode

The invention belongs to the technical field of waste power lithium ion battery recovery, and particularly relates to a green recovery treatment method for a positive electrode of a waste lithium ironphosphate battery. According to the method, sodium carbonate is used as a recovery aid to recover the waste lithium iron phosphate, and the resourceful treatment of the positive electrode of the waste lithium iron phosphate battery is realized through a series of process routes such as ball-milling mixing, solid-phase sintering, pulping and filtering, evaporative crystallization and the like. Themethod is characterized in that the recovery of all elements of the positive electrode of the waste lithium iron phosphate battery can be realized, the recovered products are LixFeyO2 (x is more thanor equal to 0.5 and less than or equal to 1, y is more than or equal to 1 and less than or equal to 2.5, x:y is more than or equal to 0.2 and less than or equal to 1) and Na3PO4.12H2O. The treatmentmethod has the advantages of simple operation, low cost and easy industrialization.
Owner:LANZHOU UNIVERSITY

Method for recycling cane sugar factory boiler ash sluicing water

The invention discloses a method for recycling cane sugar factory boiler ash sluicing water. The method comprises steps as follows: firstly, a solid-liquid mixture in the cane sugar factory boiler ash sluicing water is separated by a filter type continuous centrifuge, a filtrate and ash are obtained, the filtrate is recycled to sluice ash in a boiler, collected and entrapped ash is dried and then subjected to microwave-assisted activation treatment, activated ash is obtained and mixed with a raw sugar liquid, stirring is performed under conditions that the temperature of a mixed solution system is 50-95 DEG C and the pH value is adjusted to 6.5-7.5 through addition of lime milk, filtration is performed, and a filtered clear liquid and an ash filter cake entrapped to be used as fertilizer are obtained. According to the method, the ash in the waste cane sugar factory boiler ash sluicing water is used as a raw material, rational resource utilization and environmental protection are facilitated, a prepared activated ash particle product is high in quality, an application of the product is organically combined with a continuous sugar production decoloring technology, a sugar liquid can be effectively clarified, and the method has the good economic benefit, social benefit and ecological benefit.
Owner:广东省科学院生物与医学工程研究所

Steel-concrete combined foundation pit supporting structure

InactiveCN112392052AOvercome speedOvercome recoveryExcavationsArchitectural engineeringRebar
The invention discloses a steel-concrete combined foundation pit supporting structure. The steel-concrete combined foundation pit supporting structure comprises a steel sheet pile, a ring beam, a secondary beam, a connecting steel bar and a bracket support. The steel sheet pile forms a waterproof structure, one end of the connecting steel bar is fixed to the steel sheet pile, the other end of theconnecting steel bar penetrates through the ring beam and extends into the secondary beam, and the bracket support is arranged below the secondary beam. According to the structural design, the steel-concrete combined foundation pit supporting structure is formed by effectively combining the steel sheet pile, the ring beam, the secondary beam, the connecting steel bar and the bracket support, the defects that a conventional foundation pit supporting construction speed is low and the part recovery rate is low are overcome, the foundation pit supporting construction efficiency is improved, and green recycling of parts is realized to a greater extent.
Owner:SHANGHAI URBAN CONSTR VOCATIONAL COLLEGE

Green production and rotation technique of fresh corn and strawberries

The invention discloses a green production and rotation technique of fresh corn and strawberries. The green production and rotation technique comprises a fresh-corn green production technology, a strawberry green production technology and crop rotation. The green production and rotation technique has the advantages that after the straw of the fresh corn is returned to a field, the soil granular structure and soil physical and chemical properties can be improved favorably, diseases and pests can be reduced, soil fertility can be improved, soil organic matter content can be increased, and soil structure and quality can be improved; the corn straw can also be used as the ensilage for cattle and sheep cultivation, cattle and sheep manure is used as the raw material of biogas, biogas residues are returned to the field, and green cyclic utilization is achieved; soil fertility is improved while environment pollution is reduced, the diseases and pests of the strawberries and the fresh corn arecontrolled through a green disease and pest control technology, pesticide use amount is reduced, and the natural enemies of the pests and the ecological environment are protected to the maximum extent.
Owner:FUYANG CITY ACADEMY OF AGRI SCI

Green recycling method of spent platinum catalyst

The invention relates to the field of secondary resource comprehensive utilization of spent platinum catalysts, in particular to a green recycling method of a spent platinum catalyst. The green recycling method of the spent platinum catalyst is sequentially carried out according to the following steps of A, pretreating materials; B, compounding and mixing the materials; C, melting through an electric-arc furnace; and D, preparing powder through an iron alloy. According to the green recycling method of the spent platinum catalyst provided by the invention, an applicable material range is wide,a carrier dissolving effect is good, the platinum group metal enriching times is high, the platinum group metal content in enriching residues is high, the platinum group metal recovery is high, and the equipment corrosion is low. The precious metal recovery rate is high, the material applicability is high, the usage of auxiliary materials is reduced, the energy is saved, the consumption is reduced, and the production cost is low.
Owner:GUIYAN RESOURCE YIMEN

Mulched drip irrigation salinized cotton field ecological conditioning method

The invention discloses a mulched drip irrigation salinized cotton field ecological conditioning method. The method specifically includes the following steps that 1, before seeding, a humic acid solution is sprayed; 2, halophyte is sown; 3, the halophyte is covered with cotton straw; 4, water is supplemented to the halophyte; 5, the humic acid solution is applied to a field; 6, the halophyte is harvested. The method solves the problem that salt of an existing mulched drip irrigation cotton field is hidden and threatens the sustainability of the mulched drip irrigation technology.
Owner:XIAN UNIV OF TECH

Method for recovering lead oxide from waste lead-acid storage battery

The invention provides a method for recovering lead oxide from a waste lead-acid storage battery, and belongs to the technical field of clean recovery and lead oxide recycling of the waste lead-acid storage battery. The method comprises the following steps: recycling lead carbonate from the waste lead-acid storage battery, and crushing the lead carbonate to obtain lead carbonate powder; and carrying out flash thermal decomposition treatment on the lead carbonate powder to obtain lead oxide. According to the method, lead carbonate recovered from the waste lead-acid storage battery is used as araw material, and lead oxide is obtained by adopting a flash thermal decomposition method at a proper temperature. The method has the outstanding advantages of short reaction time, short process flow,no pollution, low energy consumption and the like, and green cyclic utilization of the waste lead-acid storage battery is realized.
Owner:KUNMING UNIV OF SCI & TECH

Low-cost black FDM printing filament prepared by utilizing recycled tobacco film masterbatch as well as preparation method and application of printing filament

The invention discloses a low-cost black FDM printing filament prepared by utilizing recycled tobacco film masterbatch as well as a preparation method and application of the printing filament. The black FDM printing filament is prepared from the following raw materials, in parts by weight: 5-40 parts of the recycled tobacco film masterbatch, 60-95 parts of polylactic acid, 0.2-3 parts of a compatibilizer, 0.5-1 part of a toughening agent, 0.5-1.5 parts of an auxiliary agent, and 0.5-1 part of white oil. The preparation method comprises the following steps: weighing each raw material accordingto one corresponding formula ratio, adding the weighed materials into a high-speed mixing machine, and performing stirring to obtain a material a; and performing extrusion by a twin-screw extruder, performing cutting to obtain a material b, and performing extrusion through a die opening of a twin-screw extruder to obtain the target product. According to the method provided by the invention, the recycled tobacco film masterbatch low-density polyethylene (PE) in a Yunnan region and polylactic acid (PLA) are mixed to prepare the polymer filament suitable for black 3D printing, the method can finda cheap substitute for 3D printing PLA filament coloring black masterbatch, the printing filament provided by the invention has a good, uniform and non-color-cast coloring effect, and the method broadens an application range of the recycled tobacco film masterbatch, realizes green recycling of PE-based polymer materials, and provides the novel 3D printing filament.
Owner:KUNMING UNIV

Green cyclic utilization method of honeycomb type denitration catalyst

The invention relates to a green cyclic utilization method of a honeycomb type denitration catalyst, and belongs to the field of flue gas denitration and material cyclic utilization. A regeneration process route and a repreparation process route are set, and a regeneration production line and a repreparation production line are arranged in parallel; a regeneration process or a repreparation process is selected according to the performance of the waste honeycomb type denitration catalyst for green cyclic utilization; and the selection basis of the regeneration process and the repreparation process is as follows: if the axial compressive strength and the radial compressive strength of the waste honeycomb type denitration catalyst are respectively greater than or equal to 1.0 MPa and greaterthan or equal to 0.2 MPa, and the specific surface area is greater than or equal to 40.0 m<2> / g, the regeneration process route is selected, and otherwise, the repreparation process route is selected.According to the green cyclic utilization method of the honeycomb type denitration catalyst, regeneration and repreparation processes are combined, valuable components in the waste denitration catalyst are fully utilized, the use amount of water is greatly reduced, and closed-loop cyclic utilization of the denitration catalyst can be realized.
Owner:UNIV OF SCI & TECH BEIJING

A method for green recycling of honeycomb denitrification catalyst

The invention relates to a green recycling method for a honeycomb denitrification catalyst, which belongs to the field of flue gas denitrification and material recycling. Two process routes of regeneration and re-preparation are set up, and the regeneration production line and the re-preparation production line are arranged side by side; the regeneration process or the re-preparation process is selected according to the performance of the waste honeycomb denitrification catalyst for green recycling; the regeneration process and the re-preparation process The basis for selection is: the axial and radial compressive strengths of spent honeycomb denitration catalysts are ≥1.0 and ≥0.2MPa respectively, and the specific surface area is ≥40.0m 2 / g, the regeneration process route is selected; otherwise, the re-production process route is selected. The green recycling method of honeycomb denitrification catalyst provided by the present invention combines regeneration and re-preparation process, fully utilizes the valuable components in the spent denitrification catalyst, and greatly saves the amount of water, which can realize the closed loop of denitrification catalyst recycle.
Owner:UNIV OF SCI & TECH BEIJING

A kind of equipment and method for thermal removal of waste metal paint layer

The invention relates to equipment and a method for thermal removing of paint layers of waste metals. The removing equipment comprises a feed bin (1), a feed inlet (2), a gate valve 1 (3), a valve 1 (4), an isolation bin 1 (5), a valve 2 (6), a gate valve 2 (7), a valve 3 (8), a heating furnace (9), a furnace tube (10), a mechanical pump (11), a valve 4 (12), a gate valve 3 (13), an isolation bin 2 (14), a valve 5 (15), a valve 6 (16), a gate valve 4 (17) and a base (18). The equipment has the functions of carrying out drying and pollution-free thermal paint removing on the waste metals containing the paint layers. The method for removing the paint layers on the surfaces of the waste metals, disclosed by the invention, comprises the steps of material drying and controllable oxygen partial pressure rotary continuous thermal paint removing. The equipment and the method, disclosed by the invention, have the characteristics of heating uniformity, high paint removing efficiency and no pollution and can be widely applied to waste metal recovery.
Owner:UNIV OF SCI & TECH BEIJING +1

Preparation method for biomimetic nanometer magnetic water treatment agent

The invention relates to a preparation method for a biomimetic nanometer magnetic water treatment agent, and belongs to the technical field of water treatment agents. According to the method, granular millet serves as a base material; a depressurization carbonization method is adopted, dehydration and dehydrogenation are performed by controlling the carbonization temperature, the heating rate and the heat preservation time to achieve carbonization, and a three-dimensional porous structure and a suitable organic surface structure are kept; sulfo groups are bonded to controlled granular millet carbon to prepare millet carbon sulfoacid; then, iron oxide is deposited on a millet carbon sulfoacid carrier through an oxidation-precipitation method to prepare the biomimetic nanometer magnetic water treatment agent. The raw materials of the prepared water treatment agent are easy to get and low in cost, and the water treatment agent is large in specific area and high in adsorption capacity and has a high removal rate for COD and chroma in wastewater.
Owner:CHANGZHOU OPTICAL MATERIAL

Recycling treatment method for high-salt gold smelting wastewater

The invention discloses a recycling treatment method for high-salt gold smelting wastewater. The method comprises the following specific steps: mixing extraction water, reduction water, impurity removal water and alkali liquor water which are generated in a gold refining process, and then carrying out refining treatment; taking the refined liquid as feed liquid to be pumped into a membrane electrolysis system to be treated, adding acid receiving liquid and alkali receiving liquid, regulating and controlling the current density and the electrolysis time, and preparing acid and alkali through electrolysis, wherein the generated acid is reused for the impurity removal and extraction section of gold, and the generated alkali is used for the desorption section of smelting tail gas purification liquid or gold-loaded activated carbon; adding a neutralizing reagent into the desalinated liquid obtained after electrolysis, controlling the pH value to be 7-8, directly discharging or recycling the obtained supernate, and directly selling the obtained underflow which is gypsum slag. According to the method, the recyclable acid liquor and alkali liquor are prepared through special electrolysis of the salt-containing wastewater, the desalinated liquor can be recycled or discharged after reaching the standard after being neutralized, a traditional MVR evaporation process is completely replaced, the production cost is greatly reduced, and wastewater recycling is achieved.
Owner:厦门紫金矿冶技术有限公司

A kind of preparation method of bupropion hydrochloride

The invention discloses a preparation method of bupropion hydrochloride. M-chlorophenylacetone is used as a raw material to take bromination reaction with sodium bromide, sulfuric acid and hydrogen peroxide in a water-halohydrocarbon solvent to prepare a brominated intermediate; then the prepared bromide reacts with tert-butylamine to prepare amfebutamone, after the reaction for preparing amfebutamone is completely reacted, the water is directly added, after a reaction solution is layered, the layered organic layer is cleaned and distilled to obtain amfebutamone, and obtained amfebutamone is acidified by virtue of isopropanol hydrochloride to obtain bupropion hydrochloride; and the peparation process of amfebutamone, the alkalinity of a water layer obtained after the layering of the reaction solution is adjusted by using sodium hydroxide, after tert-butylamine is recovered in a distillation manner, the water layer comprising bromine ions is concentrated, the pH value is adjusted to beneutral by using sulfuric acid, the obtained aqueous solution comprising sodium bromide is used for taking the bromination reaction again so as to be circularly utilized. By adopting the preparation method, the environment-friendly circular utilization of bromine is realized, and the production cost is reduced.
Owner:SHAOXING UNIV YUANPEI COLLEGE +1

Meat goose breeding method capable of accelerating growth cycle

The invention discloses a meat goose breeding method capable of accelerating the growth cycle. The meat goose breeding method comprises the following steps of goose farm and shed construction, ryegrass planting, gosling breeding and fattening and slaughtering. The ryegrass is planted in a pond of a goose farm, the excrement of meat geese is continuously composted and applied to the ryegrass, thenthe ryegrass is provided for feeding the meat geese, excrement waste is effectively treated and effectively utilized, the problems of treatment and pollution of a large amount of excrement are effectively solved, and green cyclic utilization is achieved; meanwhile, the ryegrass is used as forage grass, so that the feed feeding amount of the meat geese is reduced to a certain extent, the feed inputof the farm is reduced, the recipes of the meat geese are enriched, the ryegrass is easy to digest and promote absorption, the physique of the meat geese is enhanced, the growth of the meat geese isaccelerated, and the growth cycle of the meat geese is shortened; and meanwhile, mixed bacterial liquid is used for continuously composting the excrement of the meat geese, so that the fermentation time of the excrement of the meat geese is effectively shortened, the operation is simple and convenient, and the operability is high.
Owner:无为市万昌畜禽家庭农场

Application of a chromium-based metal-organic framework material in olefin polymerization

The invention relates to application of a chromium metal organic framework material to olefin polymerization, and belongs to the technical field of metal organic framework material catalysis. The chromium metal organic framework material is applied to catalysis of a polymerization reaction of olefin polymerization as a catalyst and preparation of a high-polymer composite material coated with the chromium metal organic framework material as a raw material. When the chromium metal organic framework material is applied to catalysis of the polymerization reaction of olefin polymerization as the catalyst, the framework material has high polymerization activity and high selectivity, and an obtained olefin polymer has a high molecular weight; in particular, when the framework material is appliedto catalysis of polymerization of isoprene, the selectivity of cis-1,4-polyisoprene is up to 95 percent, the molecular weight is up to 1,880,000, the molecular weight distribution is narrow, and the dispersion coefficient can be up to 1.17; the chromium metal organic framework material can be taken as a raw material in olefin polymerization, and is used for preparing the high-polymer composite material coated with the chromium metal organic framework material, so that the problems of complex preparation process and high cost are solved, and the obtained composite material has high heat stability and high carbon dioxide adsorption amount, and is environmentally friendly and economical.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Preparation method of benzodioxole

The invention discloses a preparation method of benzodioxole. The preparation method comprises the following steps: with DMSO, dichloromethane and sodium hydroxide as base materials, controlling a temperature to be not higher than 100 DEG C in a microwave heating manner, dropwise adding a DMSO solution of catechol, and separating out the product benzodioxole and dichloromethane after a reaction isfinished. The preparation method is low in price, mild in reaction conditions, low in the generation amount of wastewater and good in process safety, can realize green recycling of an organic solvent, and reduces production cost.
Owner:SUZHOU HOMESUN PHARMA

A method for resource utilization of boiler ash flushing water in sugarcane sugar factory

The invention discloses a method for recycling cane sugar factory boiler ash sluicing water. The method comprises steps as follows: firstly, a solid-liquid mixture in the cane sugar factory boiler ash sluicing water is separated by a filter type continuous centrifuge, a filtrate and ash are obtained, the filtrate is recycled to sluice ash in a boiler, collected and entrapped ash is dried and then subjected to microwave-assisted activation treatment, activated ash is obtained and mixed with a raw sugar liquid, stirring is performed under conditions that the temperature of a mixed solution system is 50-95 DEG C and the pH value is adjusted to 6.5-7.5 through addition of lime milk, filtration is performed, and a filtered clear liquid and an ash filter cake entrapped to be used as fertilizer are obtained. According to the method, the ash in the waste cane sugar factory boiler ash sluicing water is used as a raw material, rational resource utilization and environmental protection are facilitated, a prepared activated ash particle product is high in quality, an application of the product is organically combined with a continuous sugar production decoloring technology, a sugar liquid can be effectively clarified, and the method has the good economic benefit, social benefit and ecological benefit.
Owner:广东省科学院生物与医学工程研究所

A modified red mud subgrade structure and its construction method

The invention provides a sintering process red mud modifier, a modified red mud roadbed and a construction method of the modified red mud roadbed. The sintering process red mud modifier is prepared from, by weight, 153-231 parts of desulphurization gypsum, 77-154 parts of phosphogypsum, 83-230 parts of quick lime and 206-385 parts of cement. According to the basic principle, an inorganic modifiedmaterial and sintering process red mud are subjected to a series of physical and chemical reactions to reduce the pH value of the sintering process red mud and improve the unconfined compressive strength and road performance of the sintering process red mud. The sintering process red mud modified with the modifier has high 7-day and 28-day unconfined compressive strength and has a pH value of 9.80or below. The sintering process red mud modifier, the modified red mud roadbed and the construction method of the modified red mud roadbed have the advantages that multiple industrial solid wastes and a traditional inorganic binder are adopted for compound modification of the sintering process red mud, and thus the sintering process red mud can not only meet environmental protection requirementsand road performance requirements, but also be applied to filling of roadbeds on a large scale.
Owner:SHANDONG UNIV

Preparation method of amyl 3-pentyloxy propionate

The invention relates to a preparation method of amyl 3-pentyloxy propionate, which comprises the following steps: carrying out transesterification and addition reaction on n-amyl alcohol and an acrylate compound under the action of a basic catalyst to obtain a product containing amyl 3-pentyloxy propionate, and carrying out primary reduced pressure distillation treatment on the product containing amyl 3-pentyloxy propionate under specific conditions to obtain amyl 3-pentyloxy propionate. Distilling off a mixture of an alcohol compound and an acrylate compound, wherein the kettle liquid is a first crude product containing 3-pentyloxy amyl propionate; then carrying out secondary reduced pressure distillation treatment on the first crude product containing amyl 3-pentyloxypropionate under specific conditions, distilling out a fraction at 65-125 DEG C to obtain n-amyl alcohol, and taking a kettle liquid as a second crude product containing amyl 3-pentyloxypropionate; and neutralizing a second crude product containing the amyl 3-pentyloxy propionate by using acid, layering, taking an oil phase, and carrying out third reduced pressure distillation treatment under specific conditions to distill out a fraction at 110-153 DEG C to obtain the amyl 3-pentyloxy propionate, thereby enhancing the yield and purity of the amyl 3-pentyloxy propionate.
Owner:昌德新材科技股份有限公司

A low-cost black fdm printing wire prepared by recycling cigarette film masterbatch and its preparation method and application

The invention discloses a low-cost black FDM printing wire prepared by using recycled cigarette film masterbatch and its preparation method and application. The black FDM printing wire consists of 5-40 parts by weight of recycled cigarette film masterbatch, polylactic acid It is prepared from the raw material composition of 60-95 parts, 0.2-3 parts of compatibilizer, 0.5-1 part of toughening agent, 0.5-1.5 parts of auxiliary agent and 0.5-1 part of white oil. The preparation method is to weigh each raw material according to the formula ratio and add it to a high-mixer to stir to obtain material a; extrude through a twin-screw extruder, then cut to obtain material b, and extrude through a die on the twin-screw extruder to obtain the target product . The invention adopts the blending of low-density polyethylene (PE) and polylactic acid (PLA) from cigarette film recycling masterbatch in Yunnan area to prepare polymer wire suitable for black 3D printing. The invention can find a black masterbatch for 3D printing PLA wire Inexpensive substitute, good coloring effect, uniform and no color cast, broaden the application range of recycled cigarette film masterbatch, realize green recycling of PE polymer materials, and provide novel 3D printing filaments.
Owner:KUNMING UNIV

Canvas pool-based ecological breeding method and breeding device for rabdosia lophanthide

PendingCN114766395ALower construction standardsLow input costPisciculture and aquariaAnimal repellantsSewageZoology
The invention discloses an ecological breeding method and device for rabdosia based on a canvas pond, and belongs to the technical field of aquaculture. The breeding method comprises the steps of surveying the terrain, arranging a breeding pond matched with the terrain and supporting facilities, breeding fries, breeding commercial fishes, preventing and treating diseases and the like; the device comprises a culture pond which is composed of a plurality of communicated canvas ponds, oxygenation assemblies are arranged in the canvas ponds, the canvas ponds are connected with a sewage collecting and discharging assembly and a tail water treatment assembly, and electric energy is provided by a photovoltaic power generation assembly. The method can utilize natural conditions of a mountainous area to carry out stepped running water imitated ecological fish culture, is low in cost and easy to maintain, and realizes intensive culture of rabdosia lophanthide by recycling tail water.
Owner:温州市渔业技术推广站
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