51results about How to "Phase separation effect is good" patented technology

The invention provides a method for performing extraction separation on cobalt and nickel by using a microfluid technology. The method comprises the following steps of: uniformly mixing an extraction agent and diluent which are subjected to homogeneous phase saponification by using a mixed material liquid of Co<2+> and Ni<2+>, using 2-ethyl cthylhexyl phosphonate mono 2-ethyl cthylhexyl ester as the extraction agent and using No.260 solvent oil and using the extraction agent and the diluent as an oil phase; introducing the water phase and the oil phase into a micro-reactor by virtue of two flow pumps; mixing the two phases in the micro-reactor and performing extraction reaction at 25-50 DEG C; and collecting a product at an outlet of the micro-reactor and standing for separating the phases to ensure that Co<2+> enters the oil phase and Ni<2+> stays in the water phase so as to realize extraction separation of cobalt and nickel. According to the method, continuous flow micro-reactor with an enhanced hybrid channel structure is adopted, the extraction separation of cobalt and nickel is carried out, and the reaction time is shortened to be within a micro-second level range, so that single-level cobalt extraction efficiency is obviously improved, and the extraction levels are reduced; and moreover, standing layering on the water phase and the oil phase can be quickly carried out without any emulsion phenomenon.

The invention provides an extracting agent for extracting germanium and gallium and an extraction method using the same, relates to a hydrometallurgy extracting agent and in particular relates to an organic extracting agent for extracting germanium and gallium and an extraction method using the same. The extracting agent is characterized in that the extracting agent is O,O-dihydrocarbyl phosphorus hydroxamic acid the molecular formula of which is (RO)2P(O)NHOH, wherein in the formula, R is C5-C18 straight chain or branched chain alkyl, or C4-C14 straight chain or branched chain alkyl-substituted phenyl. The extracting agent provided by the invention has excellent extraction property, strong selectivity, high extraction rate and good phase splitting property on scattered metals such as germanium, gallium and the like. In the invention, O,O-dihydrocarbyl phosphorus hydroxamic acid is used as the extracting agent, so that germanium in an acidic aqueous solution can be extracted and enriched, or gallium in the acidic aqueous solution can be extracted and enriched, thereby realizing the separation of scattered metal germanium or gallium and elements such as zinc, iron, arsenic, manganese, calcium, magnesium and the like; and germanium and gallium in the acidic aqueous solution can also be extracted and separated step by step, thereby realizing the separation and enrichment of germanium and gallium.

The invention belongs to the technical field of heteropolyacid preparation, and particularly relates to a preparing method of sodium tungstate. Industrial sodium tungstate crystal is used as the raw material, an alcohol extraction agent is used for extracting to obtain a phosphotungstic acid water solution, phosphotungstic acid crystal can be obtained through evaporative crystallization or spray drying, organic phase and raffinate obtained after reverse extraction can be returned and used directly, and the process of organic phase regeneration is avoided. The method is short in process flow, low in manufacturing cost, high in product yield, environmentally friendly and capable of achieving large-scale industrial production.

The invention relates to a technological method and apparatus for separating triethylamine in industrial waste solution. Raw materials are preheated to 50 to 70 DEG C by virtue of a raw material preheater, and the preheated materials are separated by virtue of a primary phase separator to obtain a water phase and an oil phase. An azeotrope enters an azeotropic rectifying tower to remove water dissolved in triethylamine from the top of the aceotropic rectifying tower, and is condensed by virtue of a condenser and then enters a secondary phase separator, after the phase separation, an oil phaseand a water phase are obtained respectively, the oil phase is recycled to the azeotropic rectifying tower, and steam of a tower kettle is condensed by virtue of a product separation tower, a heat exchanger and the condenser and then enters a product receiving tank. The product is dried by a drying dehydration tower to obtain anhydrous triethylamine product. The water phase from the primary phase separator and the secondary phase separator is treated through a water phase treatment tower to remove the triethylamine dissolved in the water, the recycled triethylamine is returned to the raw material preheater, and the water of the tower kettle can be directly biochemically treated. The triethylamine product steam exchanges the heat with the raw materials, so that the heat energy loss can be reduced, the triethylamine can be well separated from the water, and the water content in the separated triethylamine product is low.

The invention discloses an extraction vanadium recovery process. Spent vanadium catalysts are subjected to water leaching and reductive acid leaching treatment to obtain VOSO4-containing extracted raw liquid, the raw liquid is subjected to the single-stage extraction, tail liquid concentration, separate reextraction and back extraction vanadium recovery process, vanadium precipitation is carried out with ammonium hydroxide, and roasting is conducted to produce vanadium pentoxide. Saponified P204 is adopted as a main extraction agent, it is ensured that the pH value of the whole system is within the optimal pH value range in the extraction process, the extraction system can maintain a stable pH value, and the single-stage extraction rate of vanadium is greatly improved to above 96.4%; tetravalent vanadium obtained through extraction can be directly subjected to vanadium precipitation without oxidation, a high-purity vanadium product is produced, the technological process is simplified, and atmosphere pollution caused by chlorine generated by chlorate vanadium oxide is avoided; meanwhile, the selectivity characteristic of the saponified P204 is utilized, the influences of iron, phosphorus and arsenic on purity of extracted vanadium are effectively avoided, a part of impurity removal work is reduced, raw material consumption is reduced, enterprise cost is reduced, and economic benefits are remarkable.

The invention discloses a method for preventing interfacial crud during vanadium-chromium extraction and separation, which is characterized in that during extraction, vanadium and chromium are extracted and separated by use of amine-type extractant in an organic phase containing the amine-type extractant and diluent composition; an aqueous phase adopts a leaching solution which contains vanadium-chromium slag and has acidity adjusted through dilute sulfuric acid or sodium hydroxide solution; and the method comprises the steps of mixing the aqueous phase with the organic phase in a separating funnel at a certain temperature, fixing the separating funnel on an oscillator, oscillating for a certain time, taking out and standing the separating funnel for demixing. The method has the advantagesof effectively preventing interfacial crud produced during vanadium-chromium extraction and separation, improving extraction equilibrium phase-separation speed, reducing the loss of organic phase andsaving operation cost.

The invention discloses a branched-chain long-chain fatty acid base imidazoline extraction agent and a preparing method and application thereof. The imidazoline extraction agent comprises multiple N atoms and long-branch-chain alkyl groups. The preparing method of the imidazoline extraction agent comprises the steps that in the normal pressure, carboxylic acid and polyethylene polyamine are subjected to the reaction under the action of a solid catalyst, after the reaction is finished, the solid catalyst is recycled through solid-liquid separation, the liquid mixture is distilled, the raw material incompletely reacted is recycled, and then the branched-chain long-chain fatty acid base imidazoline extraction agent is obtained. The preparing method has the beneficial effects that reaction conditions are moderate, the catalyst can be repeatedly used, and equipment investment and operation cost are low; the imidazoline extraction agent is used for extraction negative ions including tungsten, molybdenum and vanadium, the beneficial effects that the extraction volume is high, the phase splitting time is short, and the extraction and reverse extraction performance is excellent; and good industrial application prospects are achieved.

The invention relates to a method for removing nitrotoluene in high-concentration waste acid. The method comprises adding an extractant into the high-concentration waste acid at a certain temperature, extracting, and separating the extractant from the waste acid; and recovering the extractant. Compared with the prior art, the invention has significant advantages that the invention has simple treatment steps, significant treatment effect and mononitrotoluene (MNT) and dinitrotoluene (DNT) removal rate up to above 99%, the treated high-concentration waste acid has high purity and can be directly used for other chemical processes, and the invention is suitable for industrialization; a perfluoro solvent serving as the extractant has good fluidity, chemical inertness and good phase separation performance, and has solubility for nitrotoluene compounds at a temperature higher than a critical temperature, thus it can be reutilized and maintains high removal rate; the invention directly treats the high-concentration waste acid without diluting with water, avoids subsequent wastewater treatment, and lowers the cost; and the inventive method has few apparatus, low manufacture cost, low investment and low running cost.

The invention provides a solvent separating unit used for evaporation and recovery of a solvent system. A feed pipe arranged at the top of a barrel included by the solvent separating unit is communicated with a vertical condensate conduit through a transition pipe; the lower part of the vertical condensate conduit is provided with a horizontal condensate guide plate which is arranged to be slightly higher than a two-phase line; the central part of the vertical condensate conduit penetrates a metal phase-splitting mesh; an organic phase overflow groove with an upper opening is arranged above the metal phase-splitting mesh; and the top of the organic phase overflow groove is aligned with a liquid level line. In usage, a condensate successively flows through the transition pipe, the vertical condensate conduit and the horizontal condensate guide plate and then into the barrel for phase splitting; a water phase flows into a water phase discharging pipe, and an organic phase successively flows through the metal phase-splitting mesh and the organic phase overflow groove and then into an organic phase discharging pipe; and an inverted Y-shaped pipe can be arranged out of the barrel so as to adjust the two-phase line and prevent siphonage. According to the invention, the solvent separating unit has the advantages of an improved phase splitting effect, an improved phase splitting speed, a simple structure, convenience in operation, a wide application scope and capacity of preventing siphonage.

The invention relates to a recycling method of an organic phase used for extracting scandium. The method comprises the following steps of: adding a sodium sulfide solution into the organic phase and mixing; performing phase splitting; discharging a water phase; adding a sulfuric acid solution into the rest of organic phase; washing the acidified organic phase with water; and using the acidified organic phase to extract scandium. The organic phase treated by using the method can be recycled, the subsequent efficiencies of titanium washing and reverse extraction processes also can be improved, most of titanium impurities can be washed off from the organic phase, and the efficiency of reverse extraction can be obviously improved; and the organic phase can be totally reversely extracted by using 3mol/L of industrial alkali, the phase splitting efficiency is rapid, and the scandium content of an obtained alkali cake is high.

The invention discloses a method for dephenolization of phenolic wastewater through multi-stage mixed intensified separation. The method comprises the following steps: (1) conveying an extraction agent and phenolic wastewater into a multi-stage extraction device consisting of a plurality of supergravity extractors in an opposite direction, performing multi-stage counter-current extraction, and collecting a final extraction phase and a final raffinate; and (2) feeding the final raffinate into a solvent recycling tower, performing solvent recycling I so as to obtain crude phenol and an extraction agent I; feeding the final raffinate into a solvent steam stripping tower, performing solvent recycling II so as to obtain wastewater after dephenolization and an extraction agent II; continuously introducing the extraction agent I and the extraction agent II into the multi-stage extraction device, and performing multi-stage counter-current extraction with the phenolic wastewater. By adopting an extraction process, two-phase separation is achieved through supergravity, and good phase separation properties and large treatment capacities can be achieved; by adopting a powerless spiral or eddy mixer, rapid mass transfer balance of two phases can be achieved, the mass transfer efficiency is high, and the stage efficiency is approximate to 100%.

The invention relates to a method for recycling aniline in a preparation process of diphenylmethane series diamine and polyamine. The method is used for recycling aniline from an aniline-water mixed solution generated in a DAM refining process through liquid-liquid two-phase standing layering, wherein particularly the aniline content of 53 wt% in the aniline-water mixed solution is taken as a boundary value, when the aniline content is less than 53 wt%, the aniline-water mixed solution is directly layered, and when the aniline content is more than or equal to 53 wt%, the aniline content in theaniline-water mixed solution is adjusted to be less than 53 wt% and then layering is performed, or an auxiliary aid is added into the aniline-water mixed solution and then layering is performed, wherein the auxiliary aid is one or more of water-insoluble micromolecular aromatic hydrocarbon or chlorinated aromatic hydrocarbon and hydrochloride or sulfate of alkali metal. The method has the advantages of being simple, high in separation efficiency, high in recovery rate, high in recovered aniline concentration and the like, stable phase splitting of aniline water generated by the DAM refining unit can be achieved, and recovered aniline can be directly used as a raw material for producing DAM.

The invention relates to the technical field of ceramic preparation, and particularly relates to cast iron aventurine glaze and a method for preparing a cast iron aventurine glaze ceramic product by using the same. The cast iron aventurine glaze is prepared from the following raw materials in parts by weight: 23-28 parts of kaolin, 18-22 parts of potassium feldspar, 11-24 parts of boron frit, 14-19 parts of titanium oxide, 5-8 parts of calcium oxide, 3-8 parts of sodium oxide, 1-3 parts of magnesium oxide, 15-21 parts of quartz and 12-15 parts of waste iron slag. The preparation method comprises the steps of S1, glaze preparation; S2, slurry preparation; S3, glazing; and S4, sintering. According to the invention, green and healthy environment-friendly raw materials are adopted, and meanwhile, a better glaze effect is obtained at a lower cost.

The invention relates to a novel process for treating maleic anhydride wastewater. Aiming at the characteristics of high salinity, high COD, high oil content and low biodegradability, most of organic matters and oils can be effectively removed; the influence on a treatment mode of a physical method is smaller compared with an anaerobic treatment process, an extraction effect cannot be influenced by the change of materials, and the organic matters and the oils can be efficiently and stably removed; the method is simple in process and easy to operate, devices can be intermittently operated in an individual manner or in a series connection manner according to process requirements, the number of the devices is unlimited, the devices are easy to mount, operate and maintain, the number of needed staff is small, the labor intensity of workers can be remarkably alleviated, and the labor environment can be improved; moreover, starting up and shutdown are convenient, and online analysis and automatic control are easily implemented.

The invention relates to a complexing agent special for a copper extracting agent and a preparation method thereof, and belongs to the technical field of wet metallurgy of copper. The complexing agent special for the copper extracting agent comprises, by weight parts, 1-2 parts of silicon-containing inorganic adsorbents, 1-20 parts of silicon-containing organic adsorbents, 1-52 parts of clay and 0.1-0.5 part of activated carbon. The silicon-containing inorganic adsorbents are one or more of gedanite, white carbon black, smectite, allophane and vermiculite. The silicon-containing organic adsorbents are one or more of silane, polysiloxane, polysilane and silicon resin. According to the complexing agent special for the copper extracting agent, the elimination rate of flocculation dirt in the copper extracting agent reaches over 90%, the extraction phase splitting efficiency is improved over 50%, and the use cycle of the copper extracting agent is obviously prolonged.

The invention belongs to the technical field of metal smelting, and particularly relates to a compound extractant for deep purification of lithium ore leachate and a purification process. The raw material of the compound extractant for deep purification of the lithium ore leachate comprises an acidic phosphorus extractant AD290, and the volume fraction of the acidic phosphorus extractant AD290 is5%-20%. The compound extractant for deep purification of the lithium ore leachate can remove impurities such as iron, manganese, aluminum, calcium and magnesium at the same time, so that the content of the impurities in the purified lithium ore leachate is reduced to 1 ppm or below, and the compound extractant can be directly used for preparing battery-grade lithium carbonate.

The invention discloses a tetrabromobisphenol A filtering and phase-splitting device, and relates to the technical field of phase-splitting devices. The tetrabromobisphenol A filtering and phase-splitting device comprises a phase-splitting mechanism and a filtering mechanism; the phase-splitting mechanism and the filtering mechanism are arranged at an interval and are communicated through a pipeline, and the phase-splitting mechanism comprises a liquid inlet header pipe, a liquid outlet header pipe, an adjusting header pipe, a liquid discharge header pipe and a plurality of phase-splitting assemblies; each phase splitting assembly is communicated with a liquid inlet header pipe, a liquid outlet header pipe, an adjusting header pipe and a liquid discharge header pipe, and the liquid outlet header pipe, the adjusting header pipe and the liquid discharge header pipe are respectively provided with a liquid outlet pump, an adjusting air pump and a liquid discharge pump; the filtering mechanism comprises a filtering assembly and an auxiliary assembly; the auxiliary assembly is positioned beside the filtering assembly, and an auxiliary pipeline for communicating the auxiliary assembly with the filtering assembly is arranged between the auxiliary assembly and the filtering assembly. Through the arrangement of the phase splitting blocks in the phase splitting assembly, the phase splitting effect of the tetrabromobisphenol A solution is effectively improved, through the arrangement of the auxiliary assembly, the filtering assembly can be cleaned in time, and the production efficiency is improved.

The invention discloses a demulsification method of a W/O emulsion. The demulsification operation method of the W/O emulsion comprises the following steps that: hydrophilic and oleophobic abrasive particles are uniformly distributed in the W/O emulsion through a stirrer; a rotational flow field is generated in the mixture of the abrasive particles and the W/O emulsion by using a rotational flow device; an electrostatic field is generated in a mixture of the abrasive particles and the W/O emulsion by using a power generation device; under the synergistic effect of a rotational flow field, an electrostatic field and abrasive particles, collision is generated between the water drops, between the water drops and the abrasive particles and between the abrasive particles, the water drops are broken and coalesced and get close to the inner wall face of the rotational flow device to be gathered to form a continuous water phase, the continuous oil phase is gathered to the axis of the rotationalflow device to form an oil core, and finally oil-water phase separation is achieved. The method has the beneficial effects that special harsh conditions are not used, the work is reliable, the treatment capacity is large, the treatment cost is low, and continuous treatment can be realized; the abrasive particles are cheap and easily available, can be easily separated from a water phase, can be recycled, and have wide application prospects.