11results about How to "Solve difficult to recycle" patented technology

The present application belongs to the technical field of glass fiber sizing agent, and particularly relates to an anti-creep glass fiber sizing agent and a preparation method thereof. The anti-creep glass fiber sizing agent comprises effective components and water, and the solid content of the anti-creep glass fiber sizing agent is 3-12%. The effective components comprise the following components according to weight percentage: maleic anhydride modified long-chain branched polyolefin wax 65.5-86.9 wt.%, coupling agent 5-10 wt.%, nucleating agent 1-8 wt.%, physical cross-linking component 5-12 wt.%, initiator 0.1-0.5 wt.%, and surfactant 2-4 wt.%. The present application can effectively solve the problem of insufficient anti-creep ability of the glass fiber reinforced polypropylene material in the prior art, and at the same time, the material has good mechanical properties and fatigue resistance, which plays an important role in improving the long-term dimensional stability of the polypropylene material.

The invention discloses a method for recovering MK-7 in crystallization mother liquor, which comprises the following steps of: performing vacuum concentration on the crystallization mother liquor to remove a residual solvent, mixing and stirring the crystallization mother liquor and a solvent I until the crystallization mother liquor and the solvent I are completely dissolved, mixing a buffer solution and a solvent II, mixing and stirring the two mixed solutions to react, centrifuging, taking an upper organic phase, and refining through a reverse phase silica gel column to obtain the MK-7 in the crystallization mother liquor. Then adding the vitamin K2 crude product into a methanol solution to be heated and dissolved, slowly adding water until MK-7 is separated out, cooling to enable MK-7 to be continuously separated out, separating MK-7 crystals after separation is finished, and drying. According to the scheme, most impurities such as phospholipid impurities and pigments in the crystallization mother liquor are separated out by adopting the three-phase mixed liquor, a purified crude product of the vitamin K2 is obtained, then relatively pure MK-7 crystals are obtained through recrystallization by utilizing the solubility difference of MK-6 and NK-7 in methanol solutions with different concentrations and at different temperatures, the process is simple to operate, the production cost is reduced, and the method is suitable for industrial production. The detected purity of the separated and recovered MK-7 is 85%-90%, and the purity after recrystallization can reach 95%.

This invention relates to the field of ion sieve technology, providing a titanium-based lithium-ion adsorbent, its preparation method, and its applications. The invention involves pyrolyzing NH2-MIL-125(Ti), then mixing it with lithium carbonate for calcination, granulating it using an ethylene-vinyl alcohol copolymer as a binder, and finally acid washing to obtain the titanium-based lithium-ion adsorbent. This invention integrates metal-organic framework (MOF)-derived carbon intercalation, nitrogen doping, and polymer-assisted granulation into a single process, preparing a particulate adsorbent with a hierarchical porous structure, strong hydrophilicity, and abundant active sites, showing great potential for industrial applications. Example results show that the adsorbent of this invention, under conditions of pH=12 and 25℃, exhibits a high Li-ion concentration of 24 h. + The adsorption capacity reached 33.95 mg / g. After five cycles of adsorption and desorption, the adsorption capacity could still reach 96.9% of the initial adsorption capacity, and the titanium dissolution loss in each cycle was only about 0.4%.

The invention discloses a green deplating solution for a photovoltaic welding strip and a valuable metal separation and recovery method. The deplating solution is an aqueous solution, and solutes comprise a main oxidizing agent, a green acidic auxiliary agent, a complexing cosolvent and a copper special corrosion inhibitor; the main oxidant is selected from sodium persulfate, ammonium persulfate and ferric nitrate; the green acidic auxiliary agent is selected from sulfamic acid, methanesulfonic acid, tartaric acid and citric acid; the complexing cosolvent is selected from sodium chloride, ammonium chloride and thiourea; and the corrosion inhibitor is selected from benzotriazole, methyl benzotriazole and 2-mercapto benzimidazole. The waste welding strip is subjected to an immersion reaction at the temperature of 20-60 DEG C, tin, lead and / or silver enter the solution in the form of complex ions, and a copper substrate is kept bright and clean; and after solid-liquid separation, gradient recovery of silver extraction by replacement, lead separation by temperature difference crystallization and tin precipitation by hydrolysis can be adopted, or total replacement recovery by adding excessive zinc-based displacer can be adopted. The separation and recovery method is rapid in deplating, free of white films, low in copper loss and suitable for silver-containing and silver-free solder strips.

The invention discloses preparation of a heterojunction photocatalyst and application of the heterojunction photocatalyst in treatment of uranium-containing wastewater. The preparation comprises the following steps: step 1, preparing polystyrene nanospheres; step 2, preparing PS-TiO2 (Polystyrene); and 3, adding PS-TiO2 prepared in the step 2 into ethanol, carrying out ultrasonic dispersion, adding a carbon quantum dot solution, carrying out a stirring reaction at a certain temperature for a certain time, carrying out centrifugation, washing with ethanol and deionized water to obtain a faint yellow product, and drying the faint yellow product to obtain the heterojunction photocatalyst. The heterojunction photocatalyst PS-TiO2-coated CQDs is synthesized by taking a support type material polystyrene nanosphere as a substrate, coating the surface of the substrate with a photocatalyst TiO2 and introducing carbon quantum dots to construct an S-type heterojunction coupling in-situ surface active site modification strategy, and the heterojunction photocatalyst PS-TiO2-coated CQDs shows extremely high photocatalytic activity and special selectivity to uranium, and can be applied to the field of uranium treatment. The PS-TiO2-coated CQDs show excellent ion interference resistance, chemical stability and cycle performance in a uranium-containing solution, and the photocatalytic removal rate of the PS-TiO2-coated CQDs to U (VI) is greater than 99%.

The utility model relates to a pickling residue filtering device which comprises a gravity separation tower, a filtering bag and a recycling pool, the gravity separation tower is arranged in the recycling pool and provided with a medicament delivery pump and a drainage pump, the medicament delivery pump is communicated with the top of the gravity separation tower through a pipeline, and the drainage pump is communicated with the top of the gravity separation tower through a pipeline. A bearing table is arranged in the recovery pool, the filter bag is arranged on the bearing table and located below a valve at the bottom of the gravity separation tower, and a recovery pump is arranged on the recovery pool and communicates the recovery pool with the top of the gravity separation tower through a pipeline. According to the device disclosed by the utility model, pickling residues are settled into sludge, the sludge is filtered, chemicals in the sludge are recycled, and the cured sludge is recycled, so that the problems that the chemical utilization rate is low and the sludge is difficult to recycle are effectively solved.

This invention discloses a novel underwater deployment device and application method for a cross-medium aircraft, relating to the field of aircraft deployment platform design. The device includes: a base fixed to the bottom of a water body; a deployment compartment for storing the aircraft and fixedly connected to the base; and a communication module disposed within the deployment compartment for docking and communication with the aircraft. The communication module includes a control unit that communicates with the actuators and the communication module within the deployment compartment. The deployment compartment is located underwater. The communication module is located either within the base or the deployment compartment, or it may float on the water surface via a buoyancy airbag. This deployment device operates underwater and deploys and recovers the aircraft wirelessly. It features a simple structure, low cost, minimal equipment requirements, high reliability, and a degree of concealment.

The invention discloses a bimetallic composite oxide modified ceramic membrane as well as a preparation method and application thereof, and belongs to the technical field of ceramic membranes. According to the invention, industrial-grade aluminum oxide is used as a raw material, and the binder, the pore-forming agent, the fluxing agent, the anti-shrinking agent and the like are added, so that the roasting temperature of the ceramic membrane support is reduced, and the manufacturing cost of the ceramic membrane is reduced; by constructing a bimetallic oxide composite coating with a catalytic ozonation function on the surface of the ceramic membrane, oxidative degradation of organic pollutants on the surface of the ceramic membrane is realized, so that the anti-pollution performance of the ceramic membrane is improved, and the service life of the ceramic membrane is prolonged. The problems that an existing ceramic membrane is high in manufacturing cost and prone to membrane pollution are solved.

The invention discloses a K / FeS / g-C3N4 / TiO2 (at) PVDF membrane for photocatalytic oxidation, a preparation method and application, through SO2 and CO2 generated by pyrolysis of K4 [Fe (CN) 6] and K2SO3, gaps are generated in a microstructure of g-C3N4, the specific surface area is higher, adsorption of organic pollutants is enhanced, the reaction rate is increased, a FeS / g-C3N4 / TiO2 heterojunction structure is constructed, and the photocatalytic oxidation performance of the membrane is improved. And carbon defects or nitrogen defects generated by K ionization are introduced into the structure, so that stable electron channel connection and light energy absorption and conversion paths are realized, the light response efficiency is improved, the recombination rate of photo-generated electron holes is reduced, and the free radical yield is improved. The membrane material is applied to a circulating aquaculture water body treatment system, odor substances are degraded through photocatalytic oxidation, and deep purification of water is achieved.

The present invention provides a method for comprehensively recovering tantalum, niobium and lithium from lithium-containing ore dressing waste residue, which belongs to the field of ore dressing technology. The present invention recovers coarse-grained lithium mica by screening through a high-frequency vibrating screen, recovers tantalum and niobium minerals by "spiral chute roughing-spreading chute sweeping-shaking table selection", and recovers fine-grained lithium mica by flotation method with YF2-1 as a dispersant and YP-02 as a collector, thereby realizing the comprehensive utilization of lithium-containing ore dressing waste residue and improving the level of comprehensive resource utilization. The present invention is a high-efficiency ore dressing method with low cost, good separation effect, high separation index, good stability and strong adaptability, which is suitable for promotion and application.

The underwater pipeline robot fault variable foot plate comprises a mounting foot plate, a connecting plate capable of sliding outwards is slidably connected to one side of the mounting foot plate, a connecting sleeve is arranged on the side, away from the mounting foot plate, of the connecting plate, and an inner telescopic sleeve is slidably connected to the inner side of the connecting sleeve; the outer side of the connecting sleeve is slidably connected with an outer telescopic sleeve which alternately stretches out and draws back with the inner telescopic sleeve. An annular electromagnet sleeved with a connecting sleeve is arranged on the side, away from the mounting foot plate, of the connecting plate, the outer telescopic sleeve is provided with an annular iron ring matched with the annular electromagnet, a supporting spring is arranged between the annular magnet and the annular iron ring, a mounting frame is arranged on the side, away from the connecting plate, of the inner telescopic sleeve, and a driving wheel is mounted on the mounting frame. The edge of the outer telescopic sleeve is outwards provided with a plurality of supporting columns, and the free end of each supporting column is rotationally connected with a supporting ball. By improving the structure of the foot plate, friction between the foot plate and the pipe wall is reduced through the balls after power failure, and the robot can be taken out and recycled more easily.