156results about How to "Efficient removal of impurities" patented technology

A process and a production apparatus for producing a high-purity carboxylic acid, from which a metal-containing impurity and/or a carbonyl-group-containing impurity have been highly purified, are provided.

The process for producing a carboxylic acid according to the present invention comprises subjecting a carboxylic acid stream containing a metal-containing impurity to a first flash system 1 to give a vaporized fraction, distilling the vaporized fraction by a distillation system 5 to separate into a stream mainly containing a carboxylic acid and a fraction containing a high-volatile impurity (or lower boiling point impurity), and feeding the separated stream mainly containing the carboxylic acid to a second flash system 10 or an adsorption system to form a purified carboxylic acid.

The present invention discloses a method for effectively isolating and purifying a physiological active dauer pheromone compound having the following structural formula I related to aging and stress of C. elegans, and determination of the structure of such material. First, ethanol extract is prepared by completely concentrating a liquid medium with ethanol after culturing C. elegans on a S. basal liquid medium, and then this ethanol fraction is further extracted with ethyl acetate. Then, impurities are removed from ethyl acetate extract by a silica-gel adsorption chromatography and a pheromone extract is isolated and purified by amine column chromatographic procedures using various solvents as eluent. Finally, a pheromone compound having structural formula I is completely isolated and characterized by size-exclusion HPLC.

Polymers having an improved ability to entrain water are characterized, in some embodiments, by unusual humidity-induced phase transitions. The described polymers (e.g., hydrophilically functionalized block copolymers) have a disordered state and one or more ordered states (e.g., a lamellar state, a gyroid state, etc.). In one aspect, the polymers are capable of under-going a disorder-to-order transition while the polymer is exposed to an increasing temperature at a constant relative humidity. In some aspects the polymer includes a plurality of portions, wherein a first portion forms proton-conductive channels within the membrane and wherein the channels have a width of less than about 6 nm. The described polymers are capable of entraining and preserving water at high temperature and low humidity. Surprisingly, in some embodiments, the polymers are capable of entraining greater amounts of water with the increase of temperature. The polymers can be used in Polymer Electrolyte Membranes in fuel cells.

The invention discloses a method for extracting chlorogenic acid and isochlorogenic acid from gynura procumbens. The method comprises the following steps of drying and smashing fresh gynura procumbensleaves, and obtaining powder; mixing the powder and an ethanol solution, adopting ultrasonic extraction to obtain an extracting solution, and then centrifuging, filtering and concentrating to obtaina turbid dark green concentrated solution; adding a clarifying agent into the concentrated solution for clarifying; adding modified silicon dioxide pellets into the clarified concentrated solution, de-coloring, and enabling the color of the concentrated solution to change into light gray from dark green; adding absolute ethyl alcohol into the light-gray concentrated solution, and eliminating carbohydrates; adsorbing the carbohydrates-eliminated through a middle0high-pressure chromatographic column; after completely adsorbing, desorbing in a classification way, concentrating, and drying to obtain a chlorogenic acid finished product dry powder and isochlorogenic acid mixture. The method provided by the invention is simple in process, convenient to operate, low in cost, free of harmful solvent, high in product purity, better in purification and impurity cleaning effects, energy saving, environmental-friendly, high in production safety, and suitable for industrial production, and has a favorable market prospect.

The invention discloses a yarn reeling and tensioning device which comprises a base. The two ends of the base are provided with two first supporting rods and two second supporting rods correspondingly. The tops of the two first supporting rods are provided with input rolls in a clamping fit mode, and a fixing plate is arranged at the top of one of the second supporting rods. A servo motor is mounted at the top of the fixing plate, and the output end of the servo motor is in transmission connection with one end of a wind-up roll. The other end of the wind-up roll is connected with the top of the other second supporting rod in a clamping fit mode. The bottom of a lead screw is fixedly connected with the top of a tensioning block through a spring, and the two ends of the tensioning block areslidably connected with sliding grooves which are formed in the inner sides of two third supporting rods correspondingly. An impurity removal device is arranged on the side, close to the wind-up roll,of a fixing frame. According to the yarn reeling and tensioning device in the scheme, through the arranged tensioning blocks and lead screw, the tightness degree of yarn is quickly adjusted advantageously, and the stretching quality of the yarn is improved; and through the arranged impurity removal device, impurities can be removed efficiently while the yarn is wound up, the quality of the yarn is improved, and needs for production and using are met.

The invention discloses an impurity-removal automatic feeding device for a carding machine. The device includes an outer box, an inner box, supporting legs, a motor, a stirring shaft, a feeding port,a discharging port, a sliding baffle plate, a spring, a heating wire, an air distribution plate, an induced draft fan and a drying box, wherein the bottom of the outer box is provided with multiple supporting legs, the inner box is located inside the outer box, bottom plates of the inner and outer boxes are overlapped, the motor is arranged on the left side of the outer box, a rotating shaft of the motor penetrates through the outer box and is connected with a driving wheel, the stirring shaft is arranged inside the inner box, a left end of the stirring shaft penetrates through the inner box,the stirring shaft is connected with a driven wheel, the driven wheel and a driving wheel are engaged with each other, the inner box is further provided with the feeding port penetrating through the top of the outer box, the discharging port is arranged below the inner box, the sliding baffle plate is arranged at the discharging port, the spring is arranged between a right end of the sliding baffle plate and the outer box, the air distribution plate is further disposed above the inner box inside the outer box, the air distribution plate is provided with the heating wire, and an air inlet pipeis arranged at a top plate of the outer box above the heating wire.

A method for changing the chemical properties of fluid media is carried out in a coaxial plasma reactor. The plasma reaction in the reactor produces reactive species, such as electrons, ions and free radicals that promote better flammability of the combustible liquids, helps isolates unwanted pollutants such as sulfur and nitrogen by forming heavier compounds and also helps inactivate any microorganisms in other fluids such as water. In various embodiments, the plasma reaction also sputters off minute particles from the interior surfaces of plasma reactor. Such nanoparticles helps lower the combustion temperature of the flammable fluids and disinfect other fluids such as water. In another embodiment, breaking the bubbles into smaller size using an ultrasound generator increases the efficiency of the plasma reactor. In another embodiment, the bubbles are broken into smaller size and mixed with the fluid by agitating the liquid using a mechanical stirrer. In another embodiment, the ionization of the gases within the fluid is promoted by DC, pulsed DC, RF power applied to two electrodes. In another embodiment, an inductively coupled coil placed either outside or inside the chamber promotes the plasma generation within the bubbles. Various applications of this device include pre-treatment of the fuel before injecting it into an internal combustion engine to decrease the exhaust pollution and also decrease the combustion temperature, disinfection of drinking water, sewage treatment etc.

The invention discloses a method for aluminum chloride refining and calcium removal. The method is mainly used for removing calcium ions in pickle liquor (pH =1 to 2) obtained after the sufficient reaction of high-aluminum fly ash and hydrochloric acid. According to the method, firstly, sulphate is used as a precipitant for removing impurities; the aluminum liquid subjected to impurity removal is continuously subjected to impurity removal by chelate cation exchange resin when being hot; finally, an effective calcium removal aluminum chloride solution is obtained. Compared with the prior art, the method has the advantages that the technical process is simple; the raw material addition is single; the consumption is low; other impurities cannot be introduced; the cost is low; the calcium removal effect is obvious; the method belongs to a fly ash refined integral utilization and calcium removal industrialization method with good prospects.

The invention discloses a method for detecting amine harmful substances in food. The detection method comprises the following steps: (1) adding a dispersed adsorbent into a sample, uniformly performing mixing, adding an acrylamide isotope internal standard and a heterocyclic amine compound isotope internal standard, carrying out ultrasonic extraction and centrifugal separation by adopting an acetonitrile aqueous solution, taking supernate, blowing nitrogen to 0.5-1mL, and fixing the volume by using an ammonium acetate solution containing acetic acid to obtain a purified solution; (2), adding ferroferric oxide nanoparticles into the purified liquid, carrying out vortex oscillation decolorization and centrifugation, and taking supernatant as to-be-detected liquid; and (3), detecting the amine harmful substances in the to-be-detected liquid by using an ultra-high performance liquid chromatography-tandem mass spectrometry method. The method has the advantages of excellent purification effect, high sensitivity and strong specificity, and is suitable for simultaneous determination of a plurality of amine harmful substances in food.

The invention discloses a polishing and impurity removal mechanism for BGA solder balls. The polishing and impurity removal mechanism comprises a rack. The rack comprises a base and a beam located above the base. A carrier plate is movably arranged on the base and provided with a first polishing mechanism. A drive mechanism is arranged on the portion, on one side of the first polishing mechanism, of the carrier plate. A second polishing mechanism is arranged above the first polishing mechanism. An impurity removal mechanism is connected to the second polishing mechanism and mounted on a lifting air cylinder. The lifting air cylinder is mounted on the beam. The impurity removal mechanism comprises dust suction pipes fixedly connected to the top ends of second polishing pieces. The dust suction pipes are connected with a suction fan. By means of the polishing and impurity removal mechanism, the surface quality problems of the vaporific or wrinkled surfaces of the solder balls and the like can be solved effectively, the surface roughness of the solder balls is lowered effectively, and chippings and impurities generated in the polishing process can be removed effectively.

The invention discloses a crushing device for wire-brewing raw materials. The crushing device comprises a plurality of hoppers; a winnowing pipeline is arranged under each hopper; a bearing block is arranged in each branch pipe pipeline; a material inserting plate is arranged on each winnowing pipeline in an inserted mode; the end, inserted into the corresponding winnowing pipeline, of each material inserting plate is propped on the corresponding bearing block; an impurity outlet pipeline is further arranged on each winnowing pipeline; a branch pipeline is further arranged on each impurity outlet pipeline, and all the branch pipelines are connected to an air outlet main pipeline; a primary crushing box is arranged below each winnowing pipeline; a discharging pipeline is further arranged under each primary crushing box, and all the discharging pipelines are connected to a crushing box body; a material groove for intensively discharging the materials is further formed in the crushing boxbody; a plurality of crushing rollers are arranged below the material groove; and a discharge port is formed in the lower portion of the crushing box body. The crushing device has the advantages thatthe materials can be effectively separated and crushed, the crushing time can be selected according to different materials, and therefore the processing speed and the processing quality of products can be improved.

The invention relates to a method for comprehensive utilization of coal gangue. The method comprises the following steps: coal gangue crushing, pyrolyzing and activating, acid dissolving, residue filtering for supplying a carbon source, compressing and molding, reacting at a high temperature, crushing to obtain silicon carbide. According to the invention, the method for preparing polyaluminum chloride and photovoltaic cutting edge material-carbonized silicon powder by using the coal gangue is an important approach for effective and comprehensive utilization of the coal gangue.

The invention discloses a preparation method of high-purity dysprosium oxide. The preparation method is characterized in that dysprosium oxide raw material is added into deionized water, a refining agent is added, the raw materials are stirred at room temperature; the mixture is transferred into a container and subjected to ultrasonic irradiation oscillation; the mixture is transferred into a kettle with a stirring device, stirred for 3-5 hours at room temperature and then subjected to reduced pressure filtration; the obtained solid is put into deionized water and washed to be neutral in pH and subjected to reduced pressure suction filtration and vacuum drying at 150-180 DEG C to obtain a dysprosium oxide pure product with the purity of 99.99% or more. According to the method disclosed by the invention, the high-purity dysprosium oxide pure product with the purity of 99.99% or more can be directly prepared by deeply purifying dysprosium oxide raw material with the purity of 99.5%, the operation steps are simple and the method is convenient to operate, the equipment investment is low, and a new way is provided for preparing the high-purity dysprosium oxide product.

The invention discloses a method for efficiently removing phosphorus, arsenic and silicon impurities, extracting tungsten and recovering alkali from a crude sodium tungstate solution. The method includes the following steps of mixing calcium tungstate with the crude sodium tungstate solution for reaction, conducting filtering to obtain a sodium tungstate solution, introducing carbon dioxide into the sodium tungstate solution until the pH of the solution is 3.0-6.5 to obtain a sodium polytungstate solution, conducting adsorbing through weak-base anion-exchange resin or extracting through a weakly alkaline extractant on tungsten in the sodium polytungstate solution to obtain a raffinate or exchanged liquid as a sodium bicarbonate solution, heating the obtained sodium bicarbonate solution toobtain a sodium carbonate solution and carbon dioxide, returning the sodium carbonate solution for decomposing tungsten ore to prepare the crude sodium tungstate solution and returning carbon dioxidefor decomposing sodium tungstate solution. By means of the method, the phosphorus, arsenic and silicon impurities in the crude sodium tungstate solution can be effectively removed, the tungsten can beeffectively extracted, and the alkali can be effectively recycled.

The invention relates to a device and a method for the zero emission preparation of an aqueous oxidizer salt solution. The device of the invention concretely comprises a preparation tank, a coarse filter tank, a fine filter tank, a water tank, a wastewater concentration precipitation tank, a recovered water filter and a recovered water tank, recovered water which is filtered by the recovered water filter is injected to the recovered water tank by the lower space under the filter screen in the recovered water filter through a pipeline, and the recovered water in the recovered water tank is injected to the preparation tank through a pipeline. The invention also relates to the method for preparing the aqueous oxidizer salt solution through using the device. Advantages of the device and the method of the invention are shown in the specification.

The invention relates to the field of toothpaste tube recovery, particularly relates to a plastic product recovery device, and aims to provide the plastic product recovery device. The plastic productrecovery device comprises bottom feet and a lifting type extrusion mechanism, and a pollution discharge mechanism is arranged on the left side of the top end of a cleaning cabin. According to the device, when the device is used, the lifting type extrusion mechanism extrudes out toothpaste left in a toothpaste tube, the lifting type extrusion mechanism moves downwards, the toothpaste tube is cut into two halves through an arc-shaped blade, the toothpaste tube and a detergent solution can be stirred through a primary impurity removing mechanism, the left toothpaste is dissolved and removed, thepollution discharge mechanism discharges sewage generated by impurity removal to provide power for a crushing mechanism, and the crushing mechanism crushes the cut toothpaste tube into fragments, so that the effects of lifting type toothpaste extrusion, lifting type toothpaste tube cutting, efficient impurity removal, thorough crushing and efficient cleaning are achieved.