150results about How to "High enrichment rate" patented technology

The invention provides a method for extracting indium from indium-rich smoke dust by using an oxygen pressure technology. The method is characterized by comprising the following steps of: carrying out leaching indium extraction of the difficult-to-handle indium-rich smoke dust of a Pb-Sn reverberatory furnace by adopting a wet-process metallurgical oxygen pressure acid leaching technology, and highly enriching and recycling valuable metals in the raw material; and purifying to remove impurities of leachate, and carrying out extraction, replacement and electrolytic refining, thereby obtaining greater than 99.995% of electrical indium products. The technology method has the advantages that the indium leaching rate of the indium-rich smoke dust of the Pb-Sb reverberatory furnace and the enrichment rate of the valuable metals can be obviously increased, and the comprehensive recycling effect can be achieved, thereby waster water of indium smelting can be discharged up to the standard after being processed with low cost, the environmental pollution in the indium extraction process is eliminated. In the process, the leaching rate of the indium is more than 97%, leaching residues containless than 0.01% of indium, the enrichment rate of plumbum, tin, bismuth and zinc is more than 98%, the quality of refined indium products is more than 99.995%, and plumbum enriching slag containing greater than 60% of Pd is obtained. The technical scheme can independently form a system, can also be used for improving and perfecting old technologies and has higher popularization and application value.

The invention discloses a method for collaborative resource between a waste circuit board and an automobile tail gas waste catalyst. The method comprises the following steps: firstly, obtaining a copper-rich collective through performing crushing, magnetic separation and high voltage electrostatic separation on the waste circuit board; crushing the automobile tail gas waste catalyst to obtain waste catalyst powder; mixing the copper-rich collective and the waste catalyst powder to obtain mixed powder; adding a reagent in a certain amount of mixed powder in proportion, placing in a high-temperature muffle furnace for reaction and cooling to a room temperature after the completion of the reaction to obtain a product of which an upper layer is a glass layer, and a lower layer is a copper layer; separating the copper layer from the glass layer, taking out, crushing, then placing the glass layer in the muffle furnace for heat treatment; after the completion of the treatment, pouring microcrystalline glass liquid into a mold while the microcrystalline glass liquid is still hot, reducing the temperature and forming; after a room temperature is lowered, preparing out fluorescent microcrystalline glass. In the process, the recovery rate of precious metals exceeds 98 percent, the precious metals are enriched for 20 times or more, and the obtained fluorescent microcrystalline glass can betaken as an LED fluorescent lamp and other materials. To sum up, the method has the characteristics of being efficient, environmentally friendly and high in resource degree and is suitable for large-scale industrial application.

A low-fuel consumption and low-pollution combustion system supplies an engine with a mixture, in which oxygen contained in air is separated from nitrogen through a PSA (pressure swing adsorption) whereby oxygen having purity above 95% and a fuel mixture is fed into and burned in the combustion chamber obtaining a desired engine output with low-fuel consumption. Nitrogen is previously removed so that nitride oxide can be minimized during combustion procedure and CO and toxic gas derived from incomplete combustion can be minimized. The system obtains high engine output and low-fuel consumption by reducing toxic gas derived from incomplete combustion. The system includes an oxygen separator for separating oxygen from nitrogen by introducing external air into adsorption towers with predetermined pressure while storing the oxygen separated from the nitrogen in an oxygen storage tank and exhausting the nitrogen.

The invention provides a method for leaching an alloy material obtained from the magnetic-separating copper-nickel ore concentrate, relating to a method for recycling the platinum group metals in the process of producing the metallic nickel, in particular to a method for recycling the platinum group metals from the fine alloy material of the leaching magnetic separation copper-nickel ore concentrate. The method is characterized in that the leaching process adopts two sections: one is leaching at standard atmosphere and the other is leaching with pressurization to obtain the leaching slag with high platinum group metals content and the leaching liquid with high nickel-copper content. The method of the invention processes the alloy material of the leaching magnetic separation copper-nickel ore concentrate by the wet method technique, and adopts the processing technique combining the sulphuric acid leaching at standard atmosphere and the leaching with pressurization to obtain the leaching liquid with high nickel-copper content and the leaching slag with high platinum group metals content; the leaching slag is directly used for recycling the platinum group metals and the leaching liquid enters the electrolytic nickel system. The method effectively solves the recycling problem of the platinum group metals and the problem of environmental protection, is simple and efficient and protects the environment.

The invention discloses preparation and an application of a light-triggered erythrocyte membrane wrapped NO nano bionic donor material. The method comprises the following steps: (1) synthesizing a sulfhydrylated mesoporous silica wrapped polydopamine nanoparticle, (2) preparing a dual-load polydopamine (PDA) @ mesoporous silica nanoparticle, (3) preparing a target marked erythrocyte membrane, and(4) preparing a target molecular marked erythrocyte membrane wrapped dual-load polydopamine @ mesoporous silica nanoparticle. The PDA@mSiO2 nanoparticle with good photothermal conversion performance is successfully integrated in an NO bionic nanoparticle structure; a cell membrane can be ablated to effectively release a loaded medicine under stimulation of near infrared light; at the same time, amore obvious killing effect can be caused on tumor cells; and therefore, a combined application of various treatment means is achieved.

The invention provides a method for removing fluorine, chlorine and valuable metals in secondary zinc oxide, which solves the problems of low removal rate, high energy consumption, low environment friendliness and low economical efficiency in the prior art. According to the method, high-fluoride/chloride secondary zinc oxide used as a raw material is granulated, aired and subjected to rotary kiln roasting, flue gas is settled and subjected to dust collection, the roasted product is subjected to indirect water cooling, and a mixed air heating process is adopted by using natural gas as a heat source, thereby removing the fluorine, chlorine, lead and indium and implementing reenrichment of indium, lead and other valuable metals. The roasting process is utilized to remove most of fluorine, chlorine, lead and indium; the lead and indium are enriched in the roasted dust, thereby solving the problem of later processing of the high-fluoride/chloride secondary zinc oxide; and the method has the advantages of fewer required technical processes, high efficiency, smooth procedure, high degree of mechanization and the like, and greatly enhances the environmental and economic benefits.

The invention discloses an airflow type headspace liquid-phase microextraction method. The airflow type headspace liquid-phase microextraction system is an open system, inert gas is introduced into the surface of the sample matrix through an inert gas inlet pipe so as to mix the inert gas with the object in the gaseous phase and also drive the object to move towards the extraction solvent continuously, when passing through the extraction solvent, the object is adsorbed by the extraction solvent, the inert gas flows out the extraction system, and the process is continuously repeated until the extraction ends. The introduction of the inert gas not only increases the rate of evaporation of the object from the sample matrix, but also increases the mass transfer velocity from the object to the extraction solvent, so as to increase the enrichment ratio of the object; as the airflow type headspace liquid-phase microextraction system is an open system, the gaseous phase volume is not limited, which is beneficial for enriching the low vapor-pressure object; and by prolonging the enrichment time, the gaseous phase volume in the enrichment system is enlarged so as to increase the enrichment ratio of the object. The invention has the advantages of the enrichment detection of the low vapor-pressure object.

The invention relates to a preparation process of functional polyunsaturated fatty acid in bee pollen, which comprises the following steps: firstly, preparing free crude fatty acid; secondly, preparing urea alcohol; thirdly, performing urea inclusion reaction; fourthly, obtaining complex fatty acid; fifthly, obtaining polyunsaturated fatty acid; and sixthly, obtaining the polyunsaturated fatty acid methyl ethyl oxalate product. The invention optimizes all parameters influencing the enrichment effect, ensures the optimal process condition, improves the yield of the polyunsaturated fatty acid, has simple process, low production cost and easy industrial popularization and application, and can realize the massive production; meanwhile, the process more completely keeps the nutrient and the physiologically active of the functional polyunsaturated fatty acid, thereby being widely applied to the development and the production of relative medicine and health product thereof.

The invention discloses a membrane-type gas enrichment device based on a polyimide film, comprising a silicon substrate, a top cap and an enrichment region arranged between the silicon substrate and the top cap; the enrichment region comprises a hanging membrane, a film heater and an adsorption film, the hanging membrane is arranged on the silicon substrate, the film heater and the adsorption film are arranged on the surface of the hanging membrane, the top cap is provided with an air inlet and an air outlet, an airflow passage is formed between the hanging membrane and the top cap; the invention is characterized in that the hanging membrane adopts the polyimide film which is not provided with a through hole, and airflow in the airflow passage flows along the surface thereof. Due to excellent tenacity of the polyimide film, the size of the polyimide film can be far greater than the size of the membrane of inorganic rigid materials such as SiN and SiO2, not only is the enrichment area greatly enlarged but also the effective contact between the airflow and the adsorption film is also given into consideration, thus improving the enrichment ratio.

The invention provides a pretreatment method for platinum palladium concentrate. The pretreatment method comprises the following steps: mixing the platinum palladium concentrate, sodium carbonate, sodium hydroxide and sodium chlorate uniformly according to a certain ratio; roasting at certain temperate; transforming impurity elements such as copper, selenium and tellurium into corresponding oxide or corresponding salt; and adding the roasting slag into water according to a certain ratio and leaching, wherein impurities such as copper, selenium and tellurium enter the alkaline leachate, and gold, platinum and palladium are enriched in the alkaline leaching slag. Compared with the traditional pretreatment method for the platinum palladium concentrate, the pretreatment method for the platinum palladium concentrate has the advantages that oxidation roasting and water leaching are adopted, so the noble metal content of the alkaline leachate is low; the leaching rate of the impurities such as copper, selenium and tellurium is high, the copper leaching rate reaches over 95 percent, the selenium leaching rate reaches over 88 percent, and the tellurium leaching rate reaches over 95 percent; the enrichment rate of the noble metal such as gold, platinum and palladium is high, so the extraction treatment on gold, platinum and palladium in the next step is promoted; and equipment is low in corrosivity, safe in operation, good in comprehensive recycling benefit and good in operating environment.

The invention provides a method for preparing ruthenium trichloride with low-concentration complicated ruthenium-containing waste liquid. The method comprises the steps that the low-concentration complicated ruthenium-containing waste liquid is subjected to acidification, selective ruthenium settlement and routine washing and drying; enriched ruthenium residues are obtained; the ruthenium residues are subjected to chlorine alkalization distillation, hydrochloric acid absorption, concentration and baking; and reagent-grade ruthenium trichloride is prepared. The method has the characteristics that a technology is simple; the energy consumption is low; a ruthenium enrichment rate is high; an impurity element reaches the standard; the distillation times are less; the reaction time is short; the product quality is easy to control; and a product yield is high.

The invention discloses a hyaluronic acid derived maytansine prodrug, a preparation method thereof and application of maytansine prodrug in preparation of tumor target treatment medicines. The maytansine prodrug comprises a hyaluronic acid main chain and a maytansine side chain, wherein maytansine and hyaluronic acid are connected by a disulfide bond, and the hyaluronic acid has a molecular weight of 7-500kDA; and the maytansine content in the hyaluronic acid derived maytansine prodrug is 10-50 percent. The hyaluronic acid derived maytansine prodrug is amphipathic, and can be self-assembled in an aqueous solution to form a nano-drug, the outer hydrophilic layer is formed by hyaluronic acid, and the inner hydrophobic layer is formed by the hydrophobic drug maytansine, so that the maximum tolerated dose of an anti-cancer drug can be improved to a great extent. Furthermore, the hyaluronic acid derived maytansine prodrug has a positive target capability without extra modifying target molecules, has a high enrichment ratio on a tumor part, has high cytotoxicity to tumor cells and canwell inhibit tumor growth in the in-vivo treatment process for a tumor-bearing naked mouse.

The invention relates to an immunomagnetic bead for aflatoxin B1 enrichment purification and a preparation method and application thereof. A carboxyl carboxyl serves as a carrier, an aflatoxin B1 monoclonal antibody serves as a recognition midbody, the immunomagnetic bead coupled with the aflatoxin B1 monoclonal antibody is prepared through the process of activating, coupling, washing and closing, and aflatoxin B1 in a detecting sample can be efficiently captured and enriched through incubation of the immunomagnetic bead in proper buffer liquid under certain conditions. The immunomagnetic bead for aflatoxin B1 enrichment purification has the advantages of increasing the concentration of aflatoxin B1 in the sample to be detected, improving the lower limit of detection, eliminating interference of impurities, improving detecting accuracy and reliability, shortening sample treatment time and achieving fast detection.

The invention relates to a genetically modified cell of coexpression mouse membranous type interleukin 15 and retinoic acid early transcript 1 epsilon (Rae-1 epsilon) and a preparation method thereof. The genetically modified cell is a BaF3 cell which can stabilize the genetically modified cell of the coexpression membranous type IL-15 and Rae-1 epsilon protein. The genetically modified cell can be prepared by a method comprising the following steps: amplifying a mouse Rae-1 epsilon gene and a mouse membrane expression type IL-15 gene by a polymerase chain reaction (PCR) technology; respectively inserting the amplified mouse Rae-1 epsilon gene and the amplified mouse membrane expression type IL-15 gene into two polyclone sites of an eukaryotic expression vector pVITRO2-mcs to acquire a recombined vector; transfecting the recombined vector into a mouse tumor cell strain BaF3; and acquiring the genetically modified cell by antibiotics screening and flow cytometry sorting. The genetically modified cell can provide IFN-gamma producing killer dendritic cells (IKDC) with triple stimulating signals as an instrument for efficiently amplifying and activating the IKDC in vitro. In addition, the genetically modified cell can also be used for antineoplastic immunotherapy research.

The invention relates to a method for efficiently enriching ammonia nitrogen ions in water based on a membrane and an electrode, and belongs to the technical field of water treatment. The method for efficiently enriching ammonia nitrogen in wastewater is characterized by comprising the following steps: introducing raw water; connecting a membrane assembly C, setting the flow and stirring; connecting a power supply and setting the current; setting an electrode submerging form and the shape and thickness of the electrode; setting an extraction stopping time ratio and cleaning a membrane assembly; putting into running once again. By adopting the method, ammonia nitrogen in water can be enriched efficiently and organic matters can be separated in a single treatment unit, the defect of insufficient denitrification carbon source in the existing nitrification/denitrification process and a deformation process thereof (such as an oxidation ditch and a BAF (Biological Aerated Filter)) for treating low C/N wastewater and the defect of poor existing NH4<+1> separating and enriching efficiency are overcome, and the problems of oxidation of organic matters in an electrochemical treatment system and insufficient denitrification carbon source are solved. Moreover, the device structure is simple, and convenience is brought to practical operation and running.

The invention relates to a method for measuring the activity concentration of kalium-subtracted total beta radionuclides in seawater, and the method is characterized in that the method comprises the following steps: (a) adding a cobalt carrier into used seawater, forming cobalt ion solution, adjusting the pH value of the cobalt ion solution to be greater than seven, and then adding thioacetamide into the solution to form cobalt sulfide sediments through reaction; (b) extracting and putting the cobalt sulfide sediments under the temperature from 600 DEG C to 800 DEG C for ashing; (c) adding porphyrized ashing products to a measuring disc, adding an ethyl alcohol sample, and putting the mixture on a flow-gas type proportional counter for measurement and calculation. The method achieves the measurement of beta radionuclides with the enrichment ratio being greater than 95% which is discharged into the seawater in an operation process of nuclear facilities, such as 58Co, 60Co, 59Fe, 65Zn, 110mAg and so on, thereby guaranteeing that the sediments prepared through the method are more uniform and moderate in weight. The detection lower limit is 3mBq/L, so the method is suitable for the monitoring of the activity concentration of kalium-subtracted total beta radionuclides in seawater, and is also suitable for heavy-salt water similar to a seawater sample, and heavy-salt water which contains radionuclides and is obtained through processing.

The invention relates to a full-automatic sample thermal desorption and liquid phase micro-enriching device which comprises a heating device, a condensing device, an enriching device and a controller, wherein the heating device comprises a heating body; a heating slot is formed in the heating body; a quartz sample pipe is arranged in the heating slot; a high-temperature polytetrafluoroethylene pad is arranged at a pipe opening of the quartz sample pipe; a stainless steel pipe is arranged between the heating body and the quartz sample pipe; one end of the stainless steel pipe is arranged in the quartz sample pipe; the other end of the stainless steel pipe is connected with a micro-flow controller; a nitrogen cylinder is connected with the micro-flow controller; a syringe needle is arranged on the high-temperature polytetrafluoroethylene pad; one end of the syringe needle is arranged in the quartz sample pipe; the other end of the syringe needle is connected with the condensing device; the enriching device is connected with the condensing device; electric connecting wires are arranged between the heating body and the micro-flow controller as well as the controller. The full-automatic sample thermal desorption and liquid phase micro-enriching device has the advantages of simple structure, convenience in use, low cost, integrated function of extracting, purifying and condensing, less dosage, short enriching time and higher enriching efficiency.