32results about "Solvent extraction" patented technology

It is provided an environmentally friendly process for recycling metals and nonmetallic components from printed circuit boards (PCBs), without using treatments considered damaging to the environment and minimizing emission of greenhouse gases comprising the steps of shredding the PCBs, micronizing the shredded PCBs producing a micronized powder, removing plastic and epoxy from the micronized powder, leaching, precipitating and recuperating the Al, Fe, Zn, Ni, Cr, Cu, Au, Ag, and Pd from the micronized powder, producing a filtrate from which the Cu is recovered. The solid product of the process is a concentrate of precious metals.

A method and system for converting copper cyanide to copper oxide is provided. The method includes contacting a copper cyanide solution with an acidic solution in a precipitation tank under reaction conditions sufficient to produce a copper cyanide slurry, removing the copper cyanide slurry from the precipitation tank, separating solid copper cyanide from the copper cyanide slurry in a first separation device, removing the solid copper cyanide from the first separation device, contacting the solid copper cyanide with a sodium hydroxide solution in a production tank under reaction conditions sufficient to produce a copper oxide slurry, removing the copper oxide slurry from the production tank, separating solid copper oxide from the copper oxide slurry in a second separation device, and removing from the second separation device any residual sodium hydroxide not reacted during the process of contacting the solid copper cyanide with the sodium hydroxide solution in the production tank.

A bio-nylon fiber containing an antioxidant active ingredient and a method for preparing the same are provided. [Solution] The method for preparing bio-nylon fiber containing antioxidant active ingredients includes the steps of preparing buckwheat leaf extract, preparing filipendula extract, preparing a porous base carrier, amination treatment, modification treatment, loading, preparing a functional masterbatch, and spinning. [Effects] The method for preparing bio-nylon fiber containing antioxidant active ingredients of the present invention can improve the binding performance of the plant extract active ingredients with antioxidant function with nylon fiber, effectively avoiding the problem of the plant extract active ingredients becoming less stable and easily inactivated during the acid dyeing process, effectively avoiding the problem of the plant extract active ingredients affecting the dyeing effect and causing uneven dyeing, and further improving the wash resistance and physical properties of nylon fiber.

An object of the present disclosure is to provide a color-based automatic operation control system and control method for a lithium-ion battery continuous multi-stage solvent extraction device, which stably maintains the operation state of solvent extraction by utilizing color differences present in the organic phase solution and the aqueous phase solution depending on the type of valuable metal. To achieve the above object, a color-based automatic operation control system for a lithium-ion battery continuous multi-stage solvent extraction device according to an exemplary embodiment of the present disclosure includes: a continuous multi-stage solvent extraction device configured to extract a target metal by utilizing color differences present in the organic phase solution and the aqueous phase solution depending on the type of valuable metal; and a server configured to maintain the safety of the operation state by analyzing the color detected from the continuous multi-stage solvent extraction device.

The purification process of the graphite material includes a pelletizing step (14), a caustic firing step (16) to provide a sintered product, a water leaching step (18) to solubilize impurity minerals, send them to waste liquid treatment, and separate them, a first sulfuric acid leaching step (20) to solubilize remaining impurity minerals, send them to waste liquid treatment, and separate them from the leached solids, a hydrofluoric acid leaching step (22) to solubilize partially leached impurity minerals, send them to waste liquid treatment, and separate them from the leached solids, a second sulfuric acid leaching step (24) to solubilize impurity minerals not leached in the previous step and components precipitated in the hydrofluoric acid leaching step (22), send them to waste liquid treatment, and separate them from the leached solids, and a washing stage to separate remaining soluble impurities and provide a purified graphite material (32).

Described herein are methods of recovering lithium from dilute lithium sources. The methods include concentrating a dilute aqueous lithium source to yield an extraction feed having an extraction lithium concentration; extracting lithium from the extraction feed using direct lithium extraction in an extraction stage to yield a lithium intermediate; concentrating a stream obtained from the lithium intermediate in a concentration stage to yield a lithium concentrate; and converting lithium in the lithium concentrate to lithium hydroxide.

The invention relates to a device (100) and a method for applying a solvent (30) to a polyolefin. The device (100) comprises an extruder, the outlet (41) of which opens into a perforated plate (42) with an arrangement of multiple openings (43). An injection device (50) for applying a solvent (30) to a polyolefin melt (21) which is conveyed through the perforated plate (42) is arranged downstream of the perforated plate (42).

To provide a decolorization and purification method for BHET material with improved hue of a finished product.SOLUTION: A first dose of activated carbon is added to preliminarily treat the BHET material. After the preliminary treatment, a first cooling crystallization process and filtration are performed to obtain BHET crystals. Afterwards, an oxidant is used to chemically react with the BHET crystals to destroy a dye or impurities, and then a second dose of activated carbon is added to adsorb a chemically reacted oxide. Next, a second cooling crystallization process, filtration, and drying are performed to obtain a finished product of BHET.SELECTED DRAWING: None

A system and process for direct lithium extraction from geothermal brines, and more particular to the sequential combination of a geothermal plant (200), a direct lithium extraction circuit (400), a lithium chloride concentration and purification circuit (600), and a lithium battery chemical processing circuit (800), for the production of lithium hydroxide monohydrate, lithium carbonate or both from geothermal brines. The processing circuits are powered by the electricity and heat produced by the geothermal plant without the use of carbon-based fuels. Non-condensable gases that may come out of solution from the geothermal brine are not emitted into the atmosphere.

Provided is a method for producing purified carbon black with a reduced content of oxy-polycyclic aromatic hydrocarbons, which includes: (a) providing carbon black containing an initial content of oxy-polycyclic aromatic hydrocarbons of 1 ppm or more; (b) treating the carbon black containing the initial content of oxy-polycyclic aromatic hydrocarbons with an extractant containing carbon dioxide in a supercritical state to extract at least a part of the oxy-polycyclic aromatic hydrocarbons from the carbon black; and (c) removing the extractant containing the extracted oxy-polycyclic aromatic hydrocarbons from the carbon black to obtain purified carbon black containing an oxy-polycyclic aromatic hydrocarbon content lower than the initial content of oxy-polycyclic aromatic hydrocarbons. Further provided are carbon black obtained by the above production method and an article manufactured therefrom.

This provides a rapid and more effective method for recovering At. [Solution] A method for isolating astatine, comprising the steps of (a) contacting a composition containing astatine and bismuth with nitric acid to form a first solution containing astatine, bismuth, and nitric acid; (b) contacting a resin with the first solution to separate the astatine from the first solution and distribute it to the resin; and (c) eluting the astatine from the resin. The composition containing astatine may have the formula AtO+X- (where X- is a counterion).

This utility model relates to the field of extract preparation technology and discloses a high-efficiency filtration and concentration integrated device suitable for extract preparation, including a concentration mechanism: a filtration mechanism is provided on one side of the concentration mechanism, a control mechanism is provided at the front end of the concentration mechanism, a bottom tube is provided at the bottom of the concentration mechanism, a rotating column is rotatably connected inside the bottom tube, a discharge pipe is provided inside the rotating column, and arc blocks are fixedly connected to both ends of the inner wall of the bottom tube. Restriction holes are provided on both sides of the discharge pipe. In this high-efficiency filtration and concentration integrated device suitable for extract preparation, the operator aligns the discharge pipe with the inside of the rotating column and inserts it. After insertion, the operator aligns the restriction rod with the restriction hole and rotates the rotating column, causing the rotating column to drive the push block to move. During movement, the push block gradually contacts the arc block, pushing the restriction rod into the inside of the restriction hole, thus fixing the discharge pipe in place.

A method of reducing a concentration of PFAS in a solid waste is disclosed. The method comprises combining the solid waste with an alcohol solution to provide a mixture of a solid phase and a liquid phase in which the solid phase comprises insoluble components of the solid waste and the liquid phase comprises the alcohol solution and at least a portion of the PFAS. The solid phase and the liquid phase are then separated to provide cleaned solid waste and an alcohol solution comprising PFAS.

The present invention provides an optimized method for recovering high-purity lithium sulfate from a lithium-containing composite oxide deposited on an eroded surface of a waste sagger discarded. Therefore, when the method for producing high-purity lithium sulfate from a waste sagger of the present invention is used, it is expected not only to be able to produce high-purity lithium sulfate that can be used for manufacturing lithium secondary batteries by recycling a discarded waste sagger, but also to be able to recycle a positive electrode active material, iron oxide, alumina, silicate, and calcium carbonate obtained as by-products during the production process of the lithium sulfate.

To provide a dual processing method of composite adsorbent and composite cyclodextrin for producing Panax ginseng concentrated liquid with reduced bitterness.SOLUTION: The invention relates to a producing method of Panax ginseng concentrated liquid by including the steps of: passing Panax ginseng extract solution through composite adsorbent and producing composite adsorbent processed Panax ginseng extract solution; adding composite cyclodextrin mixed power to composite adsorbent processed Panax ginseng extract solution, stirring, leaving and filtering it; and concentrating filtered Panax ginseng extract solution. The invention also relates to the Panax ginseng extract solution produced by the method.SELECTED DRAWING: None

This application relates to a supercritical drying medium recovery system and semiconductor wafer drying equipment. The supercritical drying medium recovery system includes a separation device comprising a condensation pipeline and a first cavity. A liquid outlet communicating with the first cavity is provided on the lower wall of the condensation pipeline. The inlet of the condensation pipeline receives the drying medium containing an organic solvent, and the outlet of the condensation pipeline discharges the drying medium separated for recovery. The condensation pipeline condenses the organic solvent in the drying medium containing the organic solvent, causing the organic solvent to condense into a liquid state and flow into the first cavity from the liquid outlet. According to this application, the problem of how to recover carbon dioxide in the wafer drying process in related technologies can be solved, and carbon dioxide recovery in the wafer drying process has been achieved.

The utility model relates to the technical field of extraction, disclose a kind of supercritical point extraction kettle, including extraction kettle barrel, the extraction kettle barrel is fixedly connected with inlet pipe, the left side fixedly connected with connecting block two of inlet pipe, the inboard fixedly connected with movable rod of connecting block two, the outer fixedly connected with connecting block one of movable rod, the right side fixedly connected with pipe cover of connecting block one, the top rotary connection has hand wheel of pipe cover, the bottom fixedly connected with gear of hand wheel, the outer meshing connection has gear row of gear, the right side sliding connection has jack block of gear row, the bottom fixedly connected with sliding slot block of pipe cover, the pipe cover top is provided with dredging plug. In the utility model, connecting block one is movably connected with connecting block two by movable rod, movable block one is connected to pipe cover, movable block two is connected to inlet pipe, when needing to close pipe cover, rotate hand wheel, gear drives gear row to slide into jack block and seals inlet pipe.

A process for enriching saponins in aHesperaloe extract may include purifying a Hesperaloe crude extract by flocculation, centrifugation, foam fractionation, solvent extraction, or any combination thereof, to produce aHesperaloe processed extract comprising saponins; and filtering the Hesperaloe processed extract through one or more membranes to produce a Hesperaloe saponin-enriched extract. The one or more membranes include a first membrane with a pore size sufficient to allow saponin retention. A saponin concentration on a dry basis in the saponin-enriched retentate may be greater than a saponin concentration on a dry basis in the Hesperaloe processed extract.

The present invention employs continuous ion exchange processes in binary configurations during the refinement of rare earth elements to convert an input stream of mixed rare earth elements into two or more separate streams of isolated rare earth elements. The present invention leverages the different chemical properties and behaviors of heavier and lighter REEs to separate them in continuous ion exchange devices. The present invention applies to any rare earth feed stream in aqueous solution that is relatively pure. Two-phase solid-liquid systems are used herein.

The present invention pertains in general to an apparatus and method for infusing of a solvent with an infusing material. Embodiments of the invention include applying heat and agitation to the solvent while exposing the infusing material to the solvent for a predetermined time. Upon the end of the infusion process, a removable container can be used to dispense the solvent. Touchless temperature measuring and touchless presence sensing surrounding the removable container allow for the removable container to be placed in the dishwasher when desired.

This disclosure provides a particulate alcohol precipitation device, belonging to the technical field of alcohol precipitation equipment. It includes a storage cylinder containing a filter plate and a filter ring, with the filter ring fixedly sleeved on the outer periphery of the filter plate. Adjacent filter holes on the filter plate are symmetrically inclined, and the holes in the filter ring are vertical circular holes. A driving mechanism is provided on the filter ring to drive the filter plate to slide within the storage cylinder. In use, this improved particulate alcohol precipitation device allows the raw material to repeatedly pass through the filter holes of the filter plate and the holes of the filter ring, thereby agitating the raw material, accelerating the mixing of ethanol and water, and simultaneously separating impurities from the raw material. Subsequently, when removing the effective precipitate from the device, the effective precipitate can be retrieved from the ethanol-water mixture without extracting the supernatant, and this avoids removing precipitates containing excessive ethanol, thus greatly reducing the loss of raw materials during the use of the alcohol precipitation device.

A method for purifying a composition, the method including a step of dissolving a composition including a compound represented by Formula (1) [in Formula (1), R1 represents -N(R2)-R2 (R2 represents a C1 to C4 alkyl group), each R3 and R4 represents a C3 to C8 alkanediyl group, R5 represents a hydroxyl group, R6 represents -R7-OH (R7 represents a C4 to C12 alkanediyl group) or a hydrogen atom, and n represents an integer of 0 or 1] in an aqueous layer to perform liquid-liquid extraction, in which an oil layer used for the liquid-liquid extraction includes one or more kinds of liquids selected from the group consisting of a ketone-based liquid, an ester-based liquid, and an ether-based liquid, all of which have a solubility parameter (SP value) of 14.8 to 20.5 (MPa1 / 2).

Systems and techniques can be used to extract and recover gums from oleaginous material. In some examples, the oleaginous material is extracted with an alcohol-containing solvent to generate a miscella stream containing extracted oil and gums. The miscella is cooled to a first temperature to form a phase separation and the resulting solvent-rich phase is then cooled to a second temperature to precipitate gums in the solvent-rich phase. The precipitated gums can then be separate from the solvent-rich phase, e.g., through filtration. By extracting and separating the gums during solvent extraction, the oil recovered through the extraction process can be used or processed without undergoing a separate degumming step.

The present invention provides an optimized method for recovering high-purity lithium carbonate from a lithium-containing composite oxide deposited on an eroded surface of a waste sagger discarded. Therefore, when the method for producing high-purity lithium carbonate from a waste sagger of the present invention is used, it is expected not only to be able to produce high-purity lithium carbonate that can be used for manufacturing lithium secondary batteries by recycling a discarded waste sagger, but also to be able to recycle a positive electrode active material, iron oxide, alumina, silicate, and calcium carbonate obtained as by-products during the production process of the lithium carbonate.

The invention provides methods for purifying bis(arene) nickel complex products and related products. The invention provides a method comprising obtaining a crude mixture comprising a bis(arene) nickel complex and at least one impurity; dissolving the crude mixture in a recrystallization solvent so as to obtain a saturated solution of the crude mixture; recrystallizing the bis(arene) nickel complex; and removing the recrystallization solvent so as to obtain a purified bis(arene) nickel complex product.

In a method for producing a cobalt sulfate salt, a feed solution is prepared that includes cobalt sulfate and an aqueous sulfuric acid solution. The feed solution is evaporated and crystallized to produce a first solution. The first solution is filtered with a first purge to produce a first cobalt sulfate salt. The aqueous solution including the first cobalt sulfate salt is cooled and crystallized to produce a second solution. The second solution is filtered with a second purge to produce a second cobalt sulfate salt.

Systems and techniques are provided for processing a high oil concentration feedstock, particularly a hemp feedstock, to extract oil from the feedstock. In some examples, the feedstock is processed by flaking the hemp feedstock followed by solvent extraction. The hemp material may be introduced between rotating flaking rolls to flake the hemp heart feedstock. According to some examples, the speed and / or spacing of the flaking rolls may be controlled to control the characteristics of the resulting flaked hemp material for subsequent solvent extraction. Extraction performance of the hemp feedstock can vary based on the characteristics of the flake properties dictated by controlling the flaking rolls.

A method for depolymerizing waste polymer material into monomers includes releasing at least a portion of the dye from the waste polymer material into an alcohol solvent, wherein the alcohol solvent is a polyol, without depolymerizing the condensate in the waste polymer material and under conditions preventing a reaction between at least one dye and the alcohol solvent. The alcohol solvent is added at a weight ratio of alcohol solvent to waste polymer material between 200:1 and 10:1. The waste polymer, which is then at least partially decolorized, is separated from the alcohol solvent, and the at least one dye is extracted from the alcohol solvent to regenerate the alcohol solvent, which is then sent to storage for reuse. The condensate is depolymerized in purified, recycled alcohol solvent using a catalyst. A reactor system for carrying out the method is also described.

Continuous process for separating salts from biomass under supercritical water conditions. This description relates to a salt separator (100), preferably self-cleaning, for separating salts from a biomass containing them, the salt separator comprising: - a chamber comprising a side wall (101), a lid (102) and a bottom (103), delimiting an inner chamber (105) which can be subjected to a pressure greater than 22.1 MPa, - a precipitation structure (140), in the form of a bed of beads, positioned in the inner chamber (105), on which, when biomass is injected into the inner chamber (105), the salts contained in the solution precipitate on its surface, - a mechanical agitator (120), positioned in the inner chamber (105), capable of moving the beads, so as to detach the salts precipitated on the precipitation structure (140), - heating means (130) configured to heat at least the precipitation structure (140) to a temperature above 374°C. Figure for the abstract: Fig. 1.