58results about How to "Good recycling performance" patented technology

The invention relates to a preparation method and application of a typical acidic drug multi-template molecularly imprinted polymer. The adopted template molecules are clofibric acid, diclofenac sodium, ibuprofen, naproxen and ketoprofen. The preparation method and the application of the molecularly imprinted polymer belong to the technical field of analysis, determination and removal of five typical acidic drugs in environmental samples. The preparation method is simple and reliable, and the prepared multi-template molecularly imprinted polymer has a uniform size, a large specific surface area and higher specific selectivity for acidic drugs. The five acidic drugs in the environmental samples can be separated and gathered rapidly and efficiently. The multi-template molecularly imprinted polymer can be directly applied in selective removal of the five acidic drugs in surface water and has better effects than other adsorption materials. The method is an effective method for specific separation of a series of substances with the same attributes and has broad application prospects.

The invention discloses special precoated sand for cast of high alloy material. The sand comprises roughing sand, a lubricant, an adhesive, a curing agent and a coupling agent. The adhesive is 1.7-1.9 % of the total weight of the roughing sand. The curing agent is 9-11 % of the weight of the adhesive. The lubricant is 6-8 % of the weight of the adhesive. The coupling agent is 1-2 % of the weight of the adhesive. The roughing sand comprises reclaimed sand, cerabeads, and magnetic sand. The reclaimed sand is 50-65 % of the total weight of the roughing sand. The cerabeads are 25-35 % of the total weight of the roughing sand. The magnetic sand is 10-15 % of the total weight of the roughing sand. The sand has various superior properties of high temperature resistance, high strength, low expansion, low gas release and easy collapse. The sand can guarantee that the process of cast of high alloy material can be smoothly performed, and the production efficiency is improved.

The present invention discloses a centralized treatment process of oil field fracturing wastewater, belonging to the field of development of low permeability oil fields. The process at least comprises: 1) removing impurities; 2) sampling and determining agent addition dosage; 3) adding agents; 4) mixing with stirring; 5) standing and settling; 6) filtrating and sterilizing; and 7) filter-pressing. The equipment and facilities used in fracturing wastewater treatment are arranged with a skid-mounted structure, wastewater from each well site is transported by a pipeline through custody transfer, so that centralized treatment and unified deployment of fracturing wastewater are achieved. According to the treatment process, the limitation of single-point distributed treatment of fracturing wastewater is effectively resolved, and the treatment efficiency of wastewater is substantially improved; the input cost of fracturing wastewater is substantially decreased, and the reuse performance is improved; through centralized treatment or recycled treatment of the treated wastewater and waste residue, the impact of wastewater and waste residue to the environment is reduced, so that economic practicality of oil field pollution abatement and clean production is provided.

The invention discloses a nuclear-grade ion-exchange resin-based composite material and a preparation method thereof. The composite material is prepared by the steps: firstly reducing a platinum precursor into polymer-packaged nano platinum particles by using a reducing agent in existence of a polymer packaging agent; adding a silicon source and an aluminum source and then carrying out hydrothermal reaction employing a polymer as a structure-directing agent to obtain a platinum-silicon aluminum molecular sieve core-shell structure compound, wherein the inner core is nano platinum particles and the shell layer is a silicon-aluminum molecular sieve; and finally assembling the platinum-silicon aluminum molecular sieve core-shell structure compound to nuclear-grade ion-exchange resin to obtain the nuclear-grade ion-exchange resin-based composite material. The composite material has relatively high ion exchange property, relatively high catalytic removal efficiency, relatively high environment durability and extremely high recycling property, and has a good application prospect in the field of nuclear industry circulating water treatment.

The invention discloses a high temperature-resistant easy-collapsing precoated sand for casting. The high temperature-resistant easy-collapsing precoated sand is prepared from the following componentsin parts by weight: 87 to 118 parts of raw sand, 2 to 2.5 parts of benzoxazine resin, 0.7 to 3.1 parts of polyvinyl butyral, 3.7 to 5.6 parts of inorganic polymer, 0.3 to 0.5 part of sodium alginate,3 to 11 parts of bauxite, 3 to 13 parts of mullite powder, 5 to 15 parts of diatomite, 0.3 to 0.4 part of hexamethylenetetramine, 0.1 to 0.2 part of barium stearate, 0.1 to 0. 2 part of zinc stearate, 0.15 to 0.2 part of calcium stearate, 0.45 to 3.8 parts of flake graphite, 0.7 to 3.3 parts of dolomite powder, and 0.1 to 0.3 part of potassium nitrate. The high temperature-resistant easy-collapsing precoated sand for casting has the advantages that the combination of components is optimized; especially, the decomposing temperature of the potassium nitrate is high, the heat-resistant propertyof the benzoxazine resin is high, and the components can reach the synergistic cooperation function; the preparation method is simple, the sources of the raw materials are wide, and the high temperature-resistant property and the post-casting collapsing property of the precoated sand are guaranteed.

The invention provides an automatic suspension chain spraying assembly line. The automatic suspension chain spraying assembly line comprises a bottom plate base, a bottom plate base fixing general control cabinet, a suspension chain spraying line chain track set, an arrangement chain feeding mechanism, a manual feeding area, an electrostatic generator and pump station, an industrial humidifying chamber, an automatic spraying area, a manual paint repairing area, a leveling area, a drying area and a heat exchange chamber, wherein the heat exchange chamber is connected with the drying area; the drying area is connected with the leveling area; the drying area is connected with the suspension chain spraying line chain track set; the suspension chain spraying line chain track set is connected with the arrangement chain feeding mechanism; the leveling area is connected with the manual paint repairing area; the manual paint repairing area is sequentially connected with the industrial humidifying chamber, the electrostatic generator and pump station; the manual paint repairing area is connected with the manual feeding area; the manual paint repairing area is connected with the automatic spraying area; and the general control cabinet controls the general control cabinet, the suspension chain spraying line chain track set, the arrangement chain feeding mechanism, the manual feeding area, the electrostatic generator and pump station, the industrial humidifying chamber, the automatic spraying area, the manual paint repairing area, the leveling area, the drying area and the heat exchange chamber. The automatic suspension chain spraying assembly line is used for the automatic suspension chain spraying assembly line.

The invention discloses preparation of a magnetic carbon nanotube supported rhodium catalyst and application of the magnetic carbon nanotube supported rhodium catalyst in selective hydrogenation of NBR (nitrile butadiene rubber), wherein the preparation of the magnetic carbon nanotube supported rhodium catalyst comprises the following steps: putting perchloride iron, sodium acetate, carbon nanotubes and glycol in a reactor, carrying out a hydrothermal reaction after homogenizing, and then performing magnetic separation to remove unmagnetized carbon nanotubes after the reaction is accomplished, so as to obtain magnetic carbon nanotubes; dissolving rhodium trichloride in ethanol, adding the magnetic carbon nanotubes to react, then carrying out magnetic separation to obtain the magnetic carbon nanotube supported rhodium catalyst. A magnetic carbon nanotube carrier prepared by the application of the invention is used for supporting metal rhodium, and further used for study on hydrogenation of NBR. Experimental results show that the prepared supported catalyst has very high catalytic activity and good selectivity of double bonds, and the catalyst is magnetically recycled and simply processed after being hydrogenated, and is still very high in rehydrogenation efficiency.

The invention provides an automobile protective device material and a preparation process thereof. The automobile protective device material provided by the invention is formed by the following raw materials in parts by weight: 400 to 4000 parts of reinforced fiber, 1000 parts of caprolactam, 0.001 to 10 parts of an activating agent and 0.002 to 10 parts of a catalyst, wherein the activating agent is isocyanate and/or imide derivatives; and the catalyst is selected from one or more of sodium hydroxide, sodium methoxide, potassium methoxide, potassium ethoxide, sodium ethoxide, caprolactam, caprolactam magnesium bromide, caprolactam magnesium chloride, double caprolactam magnesium, sodium hydride, potassium hydride, potassium hydroxide and a Grignard reagent. The protective device material provided by the invention has the protective property capable of meeting the protection requirement on the basis of realizing light weight, and also has high reusability after being wasted. The preparation process provided by the invention is simple and practical, thereby facilitating large-scale production.

Disclosed is an unimpeded double-controlled vertical wind turbine. A generator (G in a manual attached figure 4B) is disposed in wind blade boxes (AJ and AK in the manual attached figure 4B, and AL in the manual attached figure 4E), and maintenance and repairing of a central shaft (V in the manual figure 4B), a bottom-shaft assembly (V in the manual figure 4B) and the bottom of a circular concrete platform (T the in manual figure 4B) are needless of aerial professional staff. The generator (G in the manual attached figure 4B) is started up in two steps one after the other under the action of a clutch, and start-up wind speed and rated power wind speed are enabled to tend to be identical. A circular retaining wall (AF in a manual attached figure 4C) is arranged for air regulation, so that the purpose of rated rotating speed and power is achieved, and a speed limiting device of an existing brake block is omitted.

The invention discloses a self-repairing and recoverable vegetable oil-based polyurethane material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, enabling vegetable oil, dihydric alcohol and diisocyanate to react under the action of a catalyst to obtain a vegetable oil-based polyurethane intermediate product; then adding N,N'-di-tert-butyl ethylenediamine into the synthesized intermediate product to obtain vegetable oil-based polyurethane resin; and carrying out hot pressing treatment to obtain the vegetable oil-based polyurethane material. The plant oil-based polyurethane material has excellent mechanical property, thermal property, adhesion property, self-repairing property and recycling property, and can be used for reversible cross-linking agents, conductive composite materials and the like. The preparation method is simple and environment-friendly in process, and the raw materials are partially from renewable resources, so that the preparation method has great significance in promoting the sustainable development of the polyurethane material industry.

The invention discloses a preparation method of a bifunctional polymer adsorbent and application of the bifunctional polymer adsorbent in gold recovery, and belongs to the technical field of adsorption materials. The preparation method comprises the following steps: carrying out aromatic nucleophilic reaction on dopamine (DA) and tetrafluoroterephthalonitrile (TFN) to form a polymer PDA-TFN, and then converting cyano into amide under an alkaline condition to prepare the bifunctional polymer adsorbent PDA-TFN-A. ThePDA-TFN-A contains a large number of indole structures and amide functional groups, and can be specifically combined with Au (III) to improve the adsorption capacity. The PDA-TFN-A can be used for reducing Au (III) into Au (0), so that the PDA-TFN-A has good recovery performance on gold. The method for synthesizing the bifunctional polymer is simple, low in cost, environmentally friendly, economical and efficient, and is expected to be used for recycling gold in electronic waste liquid through the synergistic effect of adsorption and reduction.

The invention discloses an energy-saving and environment-friendly iron-removing stone powder recycling, granulating and processing technology. The technology comprises the following steps: (1) collecting stone powder and removing iron from the stone powder; (2) conducting mixing: stirring stone powder and natural biogum into a mixture, and conducting extruding; (3) conducting drying: drying the mixture through a drying device; and (4) conducting granulating: conveying the dried mixture into a granulator, granulating the dried mixture through the granulator, and conducting storing. Iron in thestone powder can be removed and then recycled, the problem that the stone powder occupies a large area can be solved, the environment can be improved, and more energy is saved and more environment isprotected.

The invention discloses a PE film material containing lignin iron, and belongs to the technical field of functional polymer materials. According to the invention, a PE film is used as a material basicskeleton, and the PE film reacts with lignin iron, so that the lignin iron is grafted on the surface of the PE film, and a novel PE film material containing the lignin iron is obtained; the synthesismethod is simple in process, mild in reaction condition, free of high-pressure or high-temperature reaction, easy to control and capable of easily achieving large-scale production of materials, adopted chemical reagents are non-toxic or low-toxicity reagents, no toxic by-product is generated in the reaction process, and the method is environmentally friendly; when the PE film material is appliedto remediation of arsenic-contaminated soil, the pH value of the soil cannot be changed, and the convenient recovery performance of the iron-containing material is superior to that of an existing iron-containing material; and the PE film material not only has good mechanical properties, but also effectively improves the aerobic biodegradability of the basic framework material PE film.

The invention relates to the technical field of bullets and particularly relates to an aluminum alloy material and an application thereof in preparation of bullet shells. The aluminum alloy material includes, by weight, 4.0-7.0% Zn, 1.0-2.0% of Cu, 0.3-0.7% of Mn, 0.01-0.05% of rare earths, 0-0.05% of Ti, 0-0.05% of Cr, and Al. The bullet shells have advantages of high toughness, ablation resistance and good formability and are tolerant of instant high temperature and pressure generated in a bullet compartment and can form elastic deformation without breaking. The bullet shell can bear chamberpressure of 400 MPa and instant high temperature of 1000 DEG C, warhead initial speed can reach 1200 m/s, and problems of deformation, cracking and corrosion of the bullet shell are avoided; comparedwith a steel bullet shell, the bullet shell is reduced by more than 20% in total mass. The parameters can reach the standard of military, so that the bullet shell made of the aluminum alloy materialcan successfully replace a copper bullet shell or a steel bullet shell at present, thus reducing the weight of light weapons and improving maneuvering characteristics and combat capability of individual soldier.

The invention provides a lead ion and cadmium ion double-template magnetic molecularly imprinted polymer and a preparation method thereof. The magnetic molecularly imprinted polymer is prepared by using Pb<2+> and Cd<2+> as double templates, papain as a functional monomer and carbodiimide as a dehydrating agent and a coupling agent. The magnetic molecularly imprinted polymer can simultaneously adsorb two heavy metal ions Pb<2+> and Cd<2+> at a high adsorption amount and a high selectivity, has a wide application range, and has broad application prospects in fast magnetic separation, enrichmentand analysis of Pb<2+> and Cd<2+> in biological samples, environmental samples, foods and agricultural products.

The invention relates to a composite catalytic material of MIL-101 (Fe) in-situ formed on 3D-rGO, and a preparation method and application thereof. According to the composite catalytic material, 3D-rGO is used as a carrier; an in-situ synthesis method is used for in-situ synthesis of MIL-101 (Fe) or MIL-101(Fe)-NH2 in graphene; then heat treatment is carried out in a vacuum environment to remove molecular water on Fe molecules and to expose acidic sites on the Fe molecules; and thus, the material is improved in stability and catalytic performance. The composite catalytic material can efficiently degrade cellulose into small-molecular acid, and realizes the recycling of the waste. Compared with traditional catalytic materials for cellulose catalysis, the composite catalytic material of theinvention has higher selectivity, milder catalytic conditions, better catalytic efficiency and fewer by-products, and thus has broad application prospects in actual production.

The invention provides an insulating flame retardant for packaging paper as well as a preparation method and application of the insulating flame retardant, and belongs to the technical field of packaging. The insulating flame retardant for the packaging paper is prepared from the following components in parts by weight: 16 to 50 parts of dicyclohexenyl hypophosphite, 2 to 20 parts of nano silicondioxide, 5 to 20 parts of carboxylic butadiene-styrene latex and 15 to 25 parts of organic silicon lubricant. The insulating flame retardant for the packaging paper provided by the invention is simplein components, the components are not easy to interact with each other, and the service life is long; the insulating flame retardant for packaging paper provided by the invention is easy to recycle,and does not cause environmental pollution. The insulating flame retardant for the packaging paper is used for electronic parts, so that the packaging paper and paperboards for the electronic parts have flame retardance, antistatic property and insulating property, have good recycling and degrading properties, and are low in cost.