14results about How to "Efficient separation and recovery" patented technology

The invention relates to a method for separating magnesium and manganese in laterite-nickel ore hydrometallurgy, which comprises the following steps of: firstly, adding a neutralizing agent into laterite-nickel ore pickle liquor to react so as to remove iron and aluminum impurities contained in the laterite-nickel ore pickle liquor to obtain iron and aluminum removed liquor; then, adding a neutralizer into the iron and aluminum removed liquid to perform nickel-cobalt-manganese precipitation treatment so as to obtain nickel-cobalt-manganese hydroxide and nickel-cobalt-manganese precipitated liquid; and finally, introducing carbon dioxide into the nickel-cobalt-manganese settled solution to carry out air floatation-gravity settling treatment to obtain an upper emulsion and a lower emulsion, and then carrying out solid-liquid separation to respectively obtain magnesium carbonate and manganese carbonate. The separation method provided by the invention can effectively remove iron and aluminum slag, separate and recover manganese and magnesium elements in the nickel, cobalt and manganese precipitated liquid, and improve the utilization rate of resources.

The invention relates to a heat-sensitive material as well as a preparation method and application thereof. The preparation raw materials of the heat-sensitive material comprise a biomass matrix, a heat-sensitive monomer and a cross-linking agent. By matching the biomass matrix and the thermosensitive monomer, the biomass matrix and the thermosensitive monomer play a synergistic effect, so that the rare earth ion adsorbent has good adsorbability and selectivity on rare earth ions, and separation and recovery of the rare earth ions are further facilitated; meanwhile, when the heat-sensitive material is used as an adsorbent, after rare earth ions are adsorbed, the rare earth ions can be desorbed through cold water flushing, repeated recycling of the adsorbent is achieved, the whole operation process is simple, green and safe, use of organic solvents is avoided, secondary pollution to the environment is reduced, production cost is reduced, and the heat-sensitive material is suitable for industrial production. And good economic benefits are achieved.

The utility model discloses a novel built-in plate heat exchanger which comprises an outer shell, the top of the outer shell is connected with a thermal medium inlet connecting pipe, a welded plate heat exchanger is arranged in the outer shell, the lower portion of the side face of the welded plate heat exchanger is connected with a cold medium inlet connecting pipe, and the upper portion of the side face of the welded plate heat exchanger is connected with a cold medium outlet connecting pipe. The bottom of the center of the welding type plate heat exchanger is connected with a pipe box, the side face of the pipe box is connected with an uncondensed medium outlet connecting pipe penetrating through the side wall of the outer shell, a flange type differential pressure liquid level meter inserted into the pipe box is arranged below the uncondensed medium outlet connecting pipe, and the bottom of the pipe box is connected with a condensate outlet through an elbow. The plate type heat exchanger is used for designing gas-liquid and gas-gas medium heat exchange occasions with high pressure and large tube shell side pressure difference, and the problems that a traditional plate type heat exchanger is high in manufacturing cost and low in safety coefficient when used for high-pressure medium heat exchange are solved; and the problems of personal injury and environmental pollution caused by leakage of toxic and harmful media are solved.

The invention relates to the technical field of textiles, and discloses a preparation process of a light-weight environment-friendly automotive trim non-woven fabric. According to the process, three layers of fiber components including regenerated polyester, bio-based polyester and natural fibers are prepared; a sandwich structure is constructed by adopting multi-guide-bar parallel net forming, online electrostatic spinning is performed on a bio-based microporous membrane between layers, and low-melting-point hot melt adhesive powder is applied; and after needling reinforcement and gradient hot air curing are conducted, far infrared preheating is combined with a cold pressing mold for hot punching forming. While the gram weight is reduced, the sound absorption coefficient is improved, and the sound absorption material has excellent flame retardance, self-cleaning performance and full-life-cycle closed-loop recycling capacity.

The application provides a method and system for recovering fluorosilicic acid wastewater based on oligomerization-induced separation. The recovery method comprises the following steps: step 1): a first crystallization reaction is performed on a first system comprising fluorosilicic acid wastewater and calcium salt, wherein the Ca:Si molar ratio of the first system is greater than or equal to 3, the reaction time is 10-30 min, the reaction is allowed to proceed for 30-60 min after the reaction is completed, and then solid-liquid separation treatment is performed to obtain primary calcium fluoride sludge and a first supernatant; step 2): the primary calcium fluoride sludge is subjected to desiliconization cleaning treatment using a desiliconization lye to obtain a first calcium fluoride product and an alkaline recovery liquid; wherein the pH value during the desiliconization cleaning treatment is 12.5-13.5. The recovery method can efficiently recover fluorine and silicon from fluorosilicic acid wastewater, and achieves the effect of recycling fluorosilicic acid wastewater.

The invention discloses a waste tin stripping water regeneration treatment method which comprises the following steps: adding waste tin stripping water into a reaction kettle, stirring, controlling the temperature, adding a settling agent, reacting, and carrying out solid-liquid separation to obtain tin precipitation mother liquor and tin sludge; adding an acidic precipitant into the tin immersion mother liquor for reaction, and then carrying out solid-liquid separation to obtain acidic salt of copper and tin stripping aqueous solution; performing solid-liquid separation on the tin mud after the tin mud is subjected to chemical washing treatment to obtain pretreated tin mud and washing filtrate; hydrochloric acid is added into the dissolving kettle to be stirred, the pretreated tin mud is added for a heat-preservation leaching reaction, and acid leaching liquid is obtained; and performing a double-membrane electrolytic reaction by taking the acid leaching solution as a cathode reaction solution of a cathode chamber, a dilute sulfuric acid solution as an anode reaction solution of an anode chamber and a dilute hydrochloric acid solution as an intermediate reaction solution of an intermediate chamber to obtain metal tin and a ferrous chloride solution in the cathode chamber, a hydrochloric acid solution in the intermediate chamber and oxygen generated in the anode chamber. According to the method, high-valued comprehensive utilization of valuable resources in the waste tin stripping water is realized, and the treatment cost of the waste tin stripping water is effectively reduced.

The invention relates to a method for efficiently recovering copper metal in white smoke dust leaching residues, and belongs to the field of comprehensive recovery of resources. Due to the fact that metal ions which are not completely washed remain on the surface of the leaching residues, Bi < 3 + >, Cu < 2 + >, Fe < 3 + > and the like are hydrolyzed and precipitated along with the increase of the pH value of the leaching residues in the flotation slurrying process, hydrophilic hydroxide and oxychloride covers are formed on the surface of copper sulfide, and CuS flotation is inhibited. According to the method, the leaching residues are washed with the HNO3 + NaCl solution, a sediment cover layer on the surface of the copper sulfide can be dissolved, the natural flotation property of the copper sulfide is recovered, and the efficiency of recovering the copper sulfide through flotation of the leaching residues is improved. The pretreatment technology before flotation has the advantages of being high in applicability, remarkable in effect and easy to implement on site, technological indexes can be optimized on the basis of an original flotation technology, the efficiency of separating copper and lead in the leaching residues is improved, useful minerals are prevented from being lost in tailings in the flotation circulation process, and optimization of the on-site flotation technology is achieved.

The application discloses a kind of high ice nickel oxygen pressure leaching residue fire method wet method combined multi-group element comprehensive recycling method, comprising the following steps: (1) high ice nickel oxygen pressure leaching residue is mixed with sulphidizing agent, carbonaceous reducing agent, and is carried out reduction sulphidation roasting treatment, and after cooling, get calcine and rich germanium dust;(2) the calcine is added in dilute sulfuric acid, and constant flow rate SO2 is imported, and reduction acid leaching reaction is carried out, and after filtration, get ferrous solution and nickel sulphide residue;(3) the ferrous solution is frozen crystallization and gets ferrous sulfate heptahydrate;(4) the nickel sulphide residue is carried out and adds acid oxygen pressure leaching, and after filtration, get nickel sulfate solution, and cooling crystallization is carried out and gets again six water nickel sulfate.The application adopts fire method wet method combined processing technology and comprehensively recycles iron, nickel, germanium and other valuable metal elements, and selective reduction sulphidation roasting is used to preferentially process beneficial to the efficient separation among nickel, iron and germanium, and the recovery rate and separation rate of nickel and iron elements are improved.

This utility model discloses an oil-water separation device for a waste oil sludge recycling production line, comprising a base plate, with support columns fixedly connected to all four sides of the top of the base plate, a top plate fixedly connected to the top of the support columns, an oil-water separator fixedly connected to the bottom of the top plate, a motor fixedly mounted to the middle of the top of the top plate by bolts, a gear fixedly connected to the output end of the motor, a toothed plate meshing with the surface of the gear, a movable plate fixedly connected to the outer side of the toothed plate, and a first pulley drivingly connected to the top of the gear. This utility model forms a circulating heating separation system through the oil-water separator at the bottom of the top plate and a constant temperature chamber. The motor drives the spiral stirring blades and stirring rod to perform double stirring of the waste oil sludge, accelerating the oil-water separation in the sludge; the constant temperature chamber maintains the temperature required for separation, reducing oil viscosity and improving separation efficiency, enabling efficient separation and recovery of oil and water in the waste oil sludge.

This invention belongs to the field of distillers' grains recycling technology, specifically a process technology for enzymatic hydrolysis and bio-extraction of distillers' grains. The process technology includes the following steps: pretreatment of distillers' grains; preparation of a magnetic biosorbent; detoxification and stepwise enzymatic hydrolysis of the distillers' grains; and multi-stage membrane separation of the enzymatically hydrolyzed distillers' grains slurry. This invention, through combined treatment of wheat distillers' grains with plasma, pulsed electric field, and cryogenic-hot pressing, exposes more enzymatic hydrolysis sites between components during subsequent slurry preparation. This significantly promotes the enzymatic hydrolysis efficiency of amylase, cellulase, and protease, ensuring peptide yield while effectively reducing the viscosity of the enzymatically hydrolyzed distillers' grains slurry. This allows for better solid-liquid separation in subsequent plate and frame filtration processes, reducing nutrient waste.

The present application relates to the technical field of high molecular dyes, in particular to a recyclable blue chromophoric monomer, a preparation method thereof, a blue polyester, a preparation method and recycling method thereof, and a recycling method of the recycled coloring monomer. The blue chromophoric monomer comprises a 1,4-diarylamino anthraquinone chromophore and at least one hydroxyalkyl segment, the 1,4-diarylamino anthraquinone chromophore and the at least one hydroxyalkyl segment are bonded through a heteroatom, and the hydroxyalkyl segment can react with a polyester-forming monomer. The blue polyester formed by the blue chromophoric monomer has uniform color and excellent color fastness, and can be subjected to alkaline alcoholysis to obtain a blue chromophoric monomer with high purity and a polyester-forming polyacid, thereby realizing simultaneous closed-loop recycling of the polyester monomer and the colorant. The industry problem that the traditional colored polyester colorant is difficult to recycle at high value is fundamentally solved, and key technical support is provided for the circular economy development of textile materials.

The invention relates to the technical field of wastewater treatment, in particular to a quartz sand-based PMS catalyst and a preparation method thereof.The preparation method comprises the steps that pretreated quartz sand is put into an alkaline solution of dopamine hydrochloride, stirring reaction is conducted for 10-16 h at the room temperature, the quartz sand is separated, washing and drying are conducted with water and ethyl alcohol respectively, and quartz sand wrapped with a polydopamine layer is obtained; dissolving divalent manganese salt and cobalt salt in water to obtain a first solution, and dissolving 2-methylimidazole in water to obtain a second solution; and immersing the quartz sand wrapped by the polydopamine layer into a mixed solution of the first solution and the second solution, carrying out stirring reaction at room temperature, carrying out solid-liquid separation, washing a solid phase with water and ethanol respectively, and drying to obtain the quartz sand-based PMS catalyst. The catalyst disclosed by the invention has good separation, recovery and reutilization characteristics, and the catalytic efficiency is promoted by utilizing polydopamine, so that the degradation speed of PMS on organic matters in wastewater is greatly improved.

This utility model discloses a purification and recycling device for Kathon production waste, relating to the field of Kathon production technology. The waste tank is connected to a plate and frame filter press, which is connected to a first distillation tank. The first distillation tank is connected to a salting-out tank, the inlet of which is connected to an ethanol tank. The outlet of the salting-out tank is connected to a filter, the filter to a second distillation tank, the second distillation tank to an extraction tank, the inlet of which is connected to an ethyl acetate tank, the extraction tank to an organic phase storage tank, the organic phase storage tank to a third distillation tank, and the third distillation tank to a CIT / MIT byproduct recovery tank. All devices are closely connected, and materials flow orderly within the system, avoiding the cumbersome material transfer and losses of traditional processing methods. This significantly improves waste treatment efficiency, greatly increases resource recycling rate, is environmentally friendly, and reduces production costs.

This utility model discloses a formaldehyde deethanolination device, comprising a deethanolination tower, a preheater, a reboiler, a condenser, a reflux tank, a reflux pump, a feed pipeline, a reflux pipeline, and a first feeding pipeline. The feed pipeline is used to connect to the formaldehyde solution and is connected to the inlet of the preheater. The outlet of the preheater is connected to the inlet of the deethanolination tower. The top outlet of the deethanolination tower is connected to the inlet of the condenser. The outlet of the condenser is connected to the inlet of the reflux tank. The outlet of the reflux tank is connected to the inlet of the reflux pump. One end of the reflux pipeline and one end of the first feeding pipeline are both connected to the outlet of the reflux pump. This utility model can reduce steam consumption to save energy and improve methanol recovery rate, thereby reducing the residual methanol content in the formaldehyde solution and improving the stability during subsequent formaldehyde solution concentration.