150results about How to "Solve inseparable" patented technology

The present invention provides a montmorillonite/ZSM-5 molecular sieve composite material and its preparing method. The montmorillonite/beta molecular sieve composite material is prepared by evenly mixing montmorillonite with ZSM-5 molecular sieve gelatin, then processing home position crystallization, and via filtering, washing and drying. The composite material have structure characteristics of the montmorillonite and the molecular sieve at the same time, the montmorillonite and the molecular sieve are alternative. The synthetic montmorillonite/ZSM-5 molecular sieve have characteristics of small crystal grain molecular sieve by controlling the synthetic course and the conditions. The preparing method is simple, the easily separating, the molecular sieve composite material has better water-heat stability. The composite material are mainly used for all kinds of catalysts and absorption agents, especially the preparing of hydrogenation catalyst.

The invention relates to the field of urban rainwater treatment systems, in particular to a region sectioning rainwater treatment system based on a separate-system pipe network.The region sectioning rainwater treatment system comprises multiple sections divided according to area and a sewage manifold communicated with a sewage treatment plant, a sewage branched pipe, a rainwater branched pipe and at least one rainwater treatment facility are arranged in each section, each rainwater treatment facility is communicated with a discharging end of the corresponding rainwater branched pipe, a discharging end of each rainwater treatment facility is communicated with a natural water body, and a discharging end of each sewage branched pipe is communicated with the sewage manifold.The region sectioning rainwater treatment system is simple in structure, an urban water treatment system is divided into independent sections, and each rainwater treatment facility which is independent is arranged in the corresponding section, so that the delay problem in the process of long-distance delivery of early-stage rainwater in the prior art is solved, treatment pressure of the sewage treatment plant is reduced, the early-stage rainwater is avoided causing pollution to natural water, discharging treatment of rainwater is more reasonable and more efficient, and the region sectioning rainwater treatment system has high popularization value.

The invention relates to a catalyst which uses alcohol and water as a solvent and contains water soluble phosphine ligands and rhodium compounds and a method for preparing high-carbon aldehyde by a two-phase catalytic hydrogen formylation reaction by using alpha-olefin above C5 as a raw material. The invention overcomes the defects that the reaction rate of a hydrogen formylation reaction of high-carbon alpha-olefin above C5 is low, and the addition of a surface active agent for improving the reaction rate can generate two-phase emulsification and dissolution and cause phase separation difficulty and the increase of rhodium catalyst loss in a traditional two-phase water soluble rhodium-phosphine catalytic process. The invention can improve the reaction rate or avoid the emulsification, thereby reducing the rhodium catalyst loss. The innocuous and environment-friendly mixed solvent of the alcohol and the water is adopted and can be recycled, and the production cost is greatly reduced.

The invention discloses a method for recovering rare earth from precipitation sludge of a rare earth wastewater pool, comprising the main steps: firstly, preroasting the precipitation sludge of the rare earth wastewater pool, then leaching the roasted product with mineral acid to obtain a leach solution containing rare earth, and sequentially adding ammonium sulfate and oxalic acid to the leach solution so the rare earth is separated from soluble impurities in a manner of solid phase precipitation. The method has a simple process, convenient operation and low cost, solves the problem of difficult complete separation in a condition of coexistence of rare earth and calcium in a solution, can efficiently recover the rare earth in the precipitation sludge of the rare earth wastewater pool, and realizes separation of rare earth from calcium, aluminum and iron; the recovery rate of rare earth reaches above 99%; and the recovered rare earth oxide can be returned to a production main flow of a rare earth smeltery.

The invention discloses an alkylation method adopting a novel microchannel reactor. A reactor used in the invention is designed to be the microchannel reactor; a microchannel reaction zone is composed of a tubular microchannel reaction zone and a planar microchannel reaction zone, wherein the tubular microchannel reaction zone is composed of an inorganic or organic polymeric material having a fiber-grade dense porous structure and the planar microchannel reaction zone is composed of flaps liable to heat transfer. The alkylation method in the invention uses isobutane and C3-C5 olefins as raw materials and further utilizes a considerable amount of propane as a cooling agent and an entrainer to realize vaporization for heat extraction, so low reaction temperature is ensured; and a knockout drum with a hydrocyclone separation function is arranged on the bottom of the reactor for separation of products. The alkylation method and apparatus provided by the invention have the characteristics that alkylation can be carried out at a low temperature; no pre-mixing is needed for reaction raw materials; bed pressure drop is small; good energy-saving effect is obtained; high product quality is ensured and the like. The alkylation method and apparatus can realize high-efficiency energy-saving safe low-carbon environment-friendly continuous production.

The invention discloses a recycling treatment process for chlorohydric acid pickling liquid waste. The process comprises the following steps: adjusting the acidity of CaCO3 of the chlorohydric acid pickling liquid waste to 99.65-124.56g/L; adding ferrous chloride so as to enable ferrite to be in a saturation condition; heating to the bubble point, then feeding the mixture into a rectifying tower and separating, wherein the pressure in the rectifying tower is 61.05-67.50Kpa; recovering a 10-15% diluted hydrochloric acid liquid and ferrous chloride crystals. Through reasonable parameter control and decompressing and rectifying processes, hydrochloric acid liquor applicable to acid pickling steel pieces as well as a coagulant capable of being used for sewage and wastewater treatment or a chemical raw material ferrous chloride can be recovered just by means of materials generated in the steel piece acid pickling process without spending other raw materials, so that the cost is greatly saved. The process is process-investment-saving, low in energy consumption and easy for mastering of operation, and can be continuously operated or intermittently operated in batches, thereby realizing automatically controlled operation.

The invention discloses a method for improving precipitation performance of filamentous bulking sludge. The method comprises the steps of 1), crushing and screening organics, such as corn, wheat, sorghum and rice; 2), measuring the concentration of activated sludge in a biological reaction tank such as an aeration tank and a precipitation tank, and quantifying filamentous bacteria for the bulking sludge; 3), putting into the filamentous bulking sludge according to the weight ratio for preparing the screened organics per gram of the sludge or the weight ratio for preparing the organics per meter of the length of each filamentous bacterium; 4), keeping other conditions in the biological reaction tank unchanged, and increasing stirring; and 5), measuring the MLSS (mixed liquor suspended solid) value and the SVI (sludge volume index) value in the biological reaction tank, so that the improvement of the precipitation performance of the filamentous bulking sludge is achieved. The method can enable the filamentous bacteria causing sludge bulking to grow in adhering and twining manners and change a spreading growing manner of the filamentous bacteria, so that the filamentous bacteria grow densely, the problem that solids and liquid are hard to separate is solved, and the effluent quality of sewage treatment is improved.

The invention discloses a solid super acid for catalytically synthesizing PMA (2-acetoxy-1-methoxypropane), and a catalytic rectification technique and apparatus thereof. The solid super acid is prepared by the following steps: reacting TiO2 powder with a H2SO4 solution to prepare solid super acid TiO2/SO4<2-> powder, kneading with an adhesive, an enhancer, a pore forming agent, a lubricant and deionized water to obtain a formed precursor, carrying out extrusion forming, drying and roasting. The obtained solid super acid has the advantages of stable catalytic activity, low shedding loss tendency of the active component, and favorable repetitiveness, and can be easily separated from the reaction product. Propylene glycol monomethyl ether and acetic acid used as raw materials can be subjected to esterification reaction in a catalytic rectification tower under the catalytic action of the solid super acid to obtain the PMA. The method can implement the continuous catalytic rectification process, avoids the problems of recovery, equipment corrosion and the like in the liquid acid catalyst, and has the characteristics of low energy consumption, high reaction conversion rate, stable product quality and the like.

The present invention provides a montmorillonite/beta molecular sieve composite material and its preparing method. The montmorillonite/beta molecular sieve composite material is prepared by evenly mixing montmorillonite with beta molecular sieve gelatin, then processing home position crystallization, and via filtering, washing and drying. The composite material have structure characteristics of the montmorillonite and the molecular sieve at the same time, the montmorillonite and the molecular sieve are alternative. The synthetic montmorillonite/beta molecular sieve have characteristics of small crystal grain molecular sieve by controlling the synthetic course and the conditions. The preparing method is simple, the easily separating, the molecular sieve composite material has better water-heat stability. The composite material are mainly used for all kinds of catalysts and absorption agents, especially the preparing of hydrogenation catalyst.

The invention discloses a preparation technology for extracting a lithium element from a lithium ore by virtue of a sulfuric acid direct dipping process. The preparation technology comprises the following steps: 1) grinding the lithium ore into particles; 2) carrying out sulfuric acid leaching, namely putting the particular lithium ore obtained in the step 1), sulfuric acid and water into a reaction kettle in proportion, adding sodium fluoride as a catalyst, reacting for 6-8 hours, and cooling, so that a leached material is obtained; 3) sequentially separating other elements in the leached material, and reserving filtrate; and 4) separating lithium from the filtrate obtained in the step 3) and preparing lithium carbonate. The preparation technology disclosed by the invention has the advantages that the problems of high energy consumption and poorer environmental friendliness of an existing roasting method are solved and the preparation technology can be applicable to different types of lithium ores.

This invention belongs to solid phase catalyst field, especially relates to solid phase catalyst consisted by carrier and yang collaterals transition metal compound with photocatalysis activity. The catalyst is consisted by negative ion exchange resin and yang collaterals transition metal compound, they linkage with each other and there quality ratio is 1:0.01-1.5. The compound is isopoly acid, heteropoly acid or tertiary heteropoly acid, and they all have light activity. The catalyst can use visible light activate H2O2 to clear and process the organic fuel pollutant in dye printing industrial waste water.

The invention discloses an environment-friendly method for metronidazole synthesis. Formic acid is replaced with acetic acid, alcohol is added for esterification, neutralization is performed for three times, sodium sulfate and ethylene glycol are recovered, a nitration product is effectively recovered from a metronidazole mother solution, derivatives such as acetic ester, anhydrous sodium sulfate and the like are obtained, by-products such as ethylene glycol and the like are chemical raw materials with wide applications, resources are recycled, the raw materials are greatly saved, the production cost is reduced, and the whole novel process adopts simple steps and is convenient to operate.

The invention discloses a process for selectively extracting valuable metals in a waste power lithium battery and repreparing a ternary positive electrode material. The method comprises the followingsteps: (1) carrying out complete discharge, disassembly, ultrasonic stripping, calcination and grinding treatment on a recycled waste lithium battery to obtain a required LiNi1/3Mn1/3CoO2 positive electrode material; (2) leaching the LiNi1/3Mn1/3CoO2 positive electrode material through a wet metallurgy method by using mild acid and reducing agent, wherein the ratio of the positive electrode material to the added acid is controlled to be 20-60 mL/g, so as to obtain a leaching solution rich in lithium and a precipitate containing nickel-cobalt-manganese; (3) leaching the precipitate again by using a trace amount of acid and reducing agent, wherein the ratio of the precipitate to the added acid is controlled to be 20-60mL/g to obtain a metal-rich salt solution; and (4) carrying out coprecipitation on the metal salt solution to obtain a ternary precursor, adding excessive 3-10% of a lithium source according to the amount of substance of the precursor, and calcining the material at a selected temperature to obtain the ternary positive electrode material with good electrochemical performance. According to the method, metal resource utilization can be achieved, the problem of harmful garbage pollution is solved, and the cost is low.

The invention relates to a freezing positioning device which comprises a first freezing positioning clamp and a second freezing positioning clamp. The first freezing positioning clamp comprises a first heat exchange assembly and a first positioning plate; the first heat exchange assembly includes a first freezing disc detachably connected with the first positioning plate and a heater connected with the first freezing disc; the first freezing disc is provided with a first cooling flow channel; the first positioning plate is provided with an accommodating groove; the second freezing positioningclamp comprises a second heat exchange assembly and a second positioning plate; the second heat exchange assembly includes a second freezing disc detachably connected with the second positioning plate; the second freezing disc is provided with a second cooling flow channel; and the second positioning plate has the same structure as the first positioning plate. Meanwhile, the invention also provides a freezing positioning method. The freezing positioning device and the freezing positioning method have the beneficial effects that by means of freezing and fixing of positioning liquid, accurate positioning of a product in CNC machining is realized, waiting time spend by freezing and thawing the product is reduced, the working period is compressed, and working efficiency of CNC machining is improved.

The invention discloses a liquid chromatographic method for separating and determining multiple impurities in tolvaptan. High performance liquid chromatographic detection conditions are that detection wavelength is 230 to 280 nm, a chromatographic column is Symmetry shield RP18 and a mobile phase is acetonitrile-aqueous solution containing 0.2% phosphoric acid, wherein the volume fraction of acetonitrile is 43 to 47%. The method provided by the invention overcomes problems in separation and determination of tolvaptan and five impurities thereof, especially problems in separation and determination of positional isomer impurities of tolvaptan and positional isomer impurities of tolvaptan intermediates; and the method has the advantages of good specificity, simplicity, rapidness, accuracy and accurate and reliable determination results, so the quality of tolvaptan can be effectively monitored, and drug security is improved.

The invention discloses a microchannel reactor. According to the invention, a microchannel reaction zone is arranged in a reactor shell and is at least provided with a tubular microchannel reaction zone and a planar microchannel reaction zone; the tubular microchannel reaction zone is composed of a tubular microchannel member; the planar microchannel reaction zone is composed of a planar microchannel member; the planar microchannel member is composed of multiple groups of plates, and a channel gap between two plates is 0.1 to 10 mm and compose a planar microchannel; tubular microchannels of the tubular microchannel reaction zone are arranged to be perpendicular to a horizontal plane; and the planar microchannels of the planar microchannel reaction zone are arranged to be perpendicular to the horizontal plane. The microchannel reactor provided by the invention is applicable to alkylation and has the characteristics that alkylation can be carried out at a low temperature, reaction raw materials do not need premixing, bed pressure drop is small, good energy-saving effect can be obtained, high product quality is realized, etc.; and the microchannel reactor can realize high-efficiency, energy-saving, safe, low-carbon, environment-friendly and continuous production.

The invention discloses a liquid chromatographic analysis method for simultaneously quantifying glycine and iminodiacetic acid from a diethanol amine dehydrogenation product. The method comprises thefollowing steps: taking toluene sulfonyl chloride acetonitrile as a derivating agent; carrying out derivative reaction on the toluene sulfonyl chloride acetonitrile and amino acid in the diethanol amine dehydrogenation product, and then carrying out liquid chromatographic analysis; and separately drawing standard curves for the concentration of the iminodiacetic acid and the glycine by taking thepeak area of an iminodiacetic acid derivative and the peak area of a glycine derivative. The peak area of an iminodiacetic acid (IDA) standard substance and the concentration of a standard substance have linear dependence in the range of 0.5 g/L-2.500 g/L, the peak area of a glycine (Gly) standard substance and the concentration of a standard substances have linear dependence in the range of 0.01g/L-0.15 g/L, the coefficients of association are greater than 0.9990, and the relative standard deviation is smaller than 1.3%. The analysis result is accurate, analysis steps are simple and convenient, analysis sensitivity is high, the method can be used for quantitative analysis on the iminodiacetic acid as a product and the glycine as a by-product in diethanol amine dehydrogenation reaction, can also be used for liquid chromatography-mass spectrometry qualitative analysis of a product, and has important guidance significance on scientific research and industrial production on preparation of the iminodiacetic acid by diethanol amine catalytic dehydrogenation.

The invention provides an oil-water separation tank. The oil-water separation tank comprises an oil tank, a condensation coiled pipe, a heating coiled pipe, an emptying valve, a feeding hole, a discharging hole, sight glass and a water shearing opening, wherein the oil tank is divided into three parts, namely a heating region, a condensation region and an observation region; the oil tank is divided into inner and outer layers; the inner layer is a sealed space when the emptying valve, the feeding hole, the discharging hole and the water shearing opening are closed; the condensation coiled pipe is wound in an outer layer cavity at the top end of the oil tank to form a condensation region; the heating coiled pipe is wound in an outer layer cavity at the bottom end of the oil tank to form a heating region; the feeding hole is formed in the upper half part of the right side of the oil tank and the discharging hole is formed in the lower half part of the left side of the oil tank; the water shearing opening is formed in the bottom end of the oil tank; the emptying valve is mounted at the upper half part of the left side of the oil tank; and the surface of the tank wall of the condensation region is coated by a smooth coating so that oil drops can slide off. According to the oil-water separation tank, a simple and efficient method for improving the temperature of liquid is adopted and the density difference of an oil phase and a water phase is changed so that the oil and the water can be rapidly separated, so that the oil-water separation time is shortened, and furthermore, the good separation effect is realized; and most importantly, the problem that the oil and the water cannot be separated in winter is solved, the production efficiency is improved and the loss of crude oil can be reduced, so that the production cost is reduced.

The invention discloses a preparation method of ethylene glycol gemini di-isooctyl succinate sodium sulfonate. The preparation method comprises the steps that maleic anhydride and two hydroxy groups on ethylene glycol are bonded to carry out mono-esterification reaction to generate ethylene glycol monoester dimaleate; then ethylene glycol monoester dimaleate and isooctyl alcohol carry out di-esterification reaction to obtain ethylene glycol di-isooctyl dimaleate; finally ethylene glycol di-isooctyl dimaleate and sodium hydrogen sulfite carry out conjugate addition sulfonation reaction to prepare a product, wherein a catalyst for mono-esterification reaction is a carbon-based solid acid and directly serves as a catalyst for di-esterification reaction after mono-esterification. The method is easy to operate, is simple and convenient and has good environment friendliness.

The invention relates to single-layer wrinkled graphene and a production method and application thereof. The production method comprises the following steps of mixing and heating graphene oxide dispersion liquid and an alkaline solution to obtain an alkaline dispersion solution of graphene oxide; subjecting the alkaline dispersion solution of the graphene oxide to centrifugal separation and clearwater washing, and dispersing solid sediment in a hydrochloric acid solution again to obtain a mixed solution; then conducting heating acidification, after cooling is conducted, conducting centrifugalseparation and clear water washing, and dispersing a solid subjected to centrifugation in water to obtain wrinkled graphene oxide dispersion liquid subjected to alkali washing and acidification treatment; and then mixing the wrinkled graphene oxide dispersion liquid subjected to alkali washing and acidification treatment and an acidic reducer, and conducting heating to obtain the single-layer wrinkled graphene. The single-layer wrinkled graphene is distributed in a single layer mode, a graphene nanosheet layer has a good wrinkled structure, and stacking of graphene nanosheet layers can be effectively inhibited, so that more fluffy graphene powder is obtained, and the density is small; and the wrinkled graphene powder is more liable to be filtered out from reduced dispersion liquid, so that the problem that in practical application, graphene powder is hard to separate out is solved, and production and the utilization rate of graphene are greatly improved.