10results about How to "Short separation time" patented technology

The invention discloses a carboxyl-terminated hyperbranched magnetic silver-based catalyst as well as a preparation method and application thereof, and relates to the technical field of wastewater treatment. Comprising the following steps: preparing magnetic Fe3O4 nanoparticles MNP by adopting a coprecipitation method; the preparation method comprises the following steps: sequentially coating the surface of MNP with SiO2 and gamma-aminopropyltrimethoxysilane, and synthesizing an aminated magnetic nanoparticle FSN; the preparation method comprises the following steps: carrying out blending reaction on FSN and a carboxyl-terminated hyperbranched polymer solution, washing, separating a product by a magnet, and drying to obtain carboxyl-terminated hyperbranched magnetic silicon shell particles FSNC; fSNC is dissolved in a silver nitrate solution for reaction, then sodium borohydride is added for continuous reaction, washing, product separation by a magnet and drying are performed, and the carboxyl-terminated hyperbranched magnetic silver-based catalyst Ag / FSNC is obtained. The carboxyl-terminated hyperbranched magnetic silver-based catalyst provided by the invention can effectively catalyze reduction of p-nitrophenol into p-aminophenol, has good magnetic responsiveness, is convenient for recovery and reuse of the catalyst, can continue a catalytic experiment without treatment, and realizes stable recycling of the catalyst.

The invention discloses a coal washing water efficient solid-water separating agent and method, and belongs to the technical field of coal washing water treatment. The solid-water separation agent comprises a solid-water separation agent A and a solid-water separation agent B. The solid-water separation agent A comprises 20% by mass of poly dimethyl diallyl ammonium chloride with the effective content of 40%; the mass fraction of polyaluminum chloride with the effective content of 10% is 20%; the effective content of the polyferric trichloride is 30%, and the mass fraction is 5%. The solid-water separating agent B comprises polyacrylamide, and the mass fraction of the polyacrylamide is 45%; magnesium chloride with a mass fraction of 25%; magnesium chloride with a mass fraction of 15%; sodium sulfate with a mass fraction of 10%; and isopropanol with a mass fraction of 5%. Rapid separation of coal washing water solid-water can be achieved, and the dosage of the coal washing water solid-water separating agent A is 7-20 g, and the dosage of the coal washing water solid-water separating agent B is 2-8 g. The efficient solid-water separating agent for coal washing water has the advantages of being small in dosage, fast in solid-water separation, short in separation time, high in separation efficiency, clear in upper-layer water after precipitation, good in water recycling effect and the like.

The application discloses a blood separation device, which is suitable for synchronous centrifugal motion with a centrifugal driving device, and comprises a sample bin, a flow guide pipe, a sensing assembly, a valve assembly, a distribution bin and a controller. The sample bin is communicated with the inlet end of the valve assembly through the flow guide pipe. The valve assembly can be switched among three states of closing the inlet end, communicating the inlet end with the first outlet end and communicating the inlet end with the second outlet end. The distribution bin is provided with independent storage cavities communicated with the two outlet ends respectively. The controller controls the valve state switching according to the detection signal of the sensing assembly. The blood component export and component separation are completed by centrifugal force driving. The device can complete component separation without stopping centrifugation, and the pump body and rotary sealing joint are omitted, so that the structure is simplified. The secondary mixing of blood components caused by stopping is avoided, and the separation efficiency and purity are improved. The whole process is automatically operated, and the manual operation and pollution risk are reduced.

The invention discloses a method for extracting plasma exosomes based on an ultracentrifugation method, which belongs to the technical field of biomedicine, and comprises the following main steps: firstly, carrying out differential centrifugation to remove visible components, cell debris and large vesicles in blood, ensuring no platelet residue, reducing the possibility that large particulate matters carry exosomes to settle, and extracting exosomes from the exosomes; the subsequent exosome recovery amount is increased; secondly, low-temperature operation is carried out in the whole process, so that the biological activity and the structure of the exosome can be better guaranteed, the degradation of exosome protein and RNA is effectively avoided, and the sample purity is high. According to the method for extracting the plasma exosomes based on the ultracentrifugation method, impurities such as cell debris and protein particles in the plasma are effectively removed by using a 0.22-micron filter for filtration, the purity of the exosomes is improved, and the method for extracting the plasma exosomes based on the ultracentrifugation method is short in separation time, high in repeatability, low in operation cost, large in sample treatment capacity, not prone to introducing personal errors and capable of being used for primary separation of a large number of samples.

The invention relates to a downhole oil-gas-water three-phase efficient separation device suitable for an oil well with super-high liquid yield, which comprises a combined shell and a multi-stage separation structure, the upper end of the combined shell is connected with an upper connector, the lower end of the combined shell is connected with a lower connector, and the lower end of the lower connector is connected with a bridge type channel; an oil discharge channel, an exhaust channel and a water discharge channel are arranged in the wall of the combined shell; the multi-stage separation structure is formed by connecting all stages of separation structures in series in the combined shell from top to bottom; each stage of separation structure is provided with a grading shell and a grading three-phase separator group, each grading three-phase separator group comprises a plurality of three-phase separators which are connected in parallel, an oil phase deposition plate, a degassing composition plate, a gas-liquid separation cylinder, a combined pore plate and an underflow cover, and the degassing composition plate is formed by arranging an upper part plate and a lower part plate on the outer edge of a central column. According to the invention, the multi-stage serial single-stage parallel cyclone separator is applied to an offshore oil field, and the three-stage separation structure works independently, so that the separation efficiency is greatly improved.

The invention belongs to the technical field of pharmaceutical analysis, and particularly relates to a method for separating related impurities in a dopurazide tablet and determining the content of each component. According to the method, octadecyl silane bonded silica gel is adopted as a filling agent, a potassium hexafluorophosphate solution is adopted as a mobile phase A, methyl alcohol is adopted as a mobile phase B, and benserazide hydrochloride, a benserazide hydrochloride impurity C and a benserazide hydrochloride impurity E are sequentially separated through gradient elution; and then the sample enters a detector with the detection wavelength of 210 nm to be detected. And calculating the content of each component by adopting an external standard method according to the measured chromatogram. The self-established high performance liquid chromatography is not interfered by other impurities or auxiliary materials, and separation and determination of the benserazide hydrochloride, the benserazide hydrochloride impurity C and the benserazide hydrochloride impurity E can be realized within 35 minutes. The method is high in specificity, high in accuracy and good in precision and durability.

This invention relates to a chip separation device for CNC machine tools and the CNC machine tool itself. The separation device includes a frame, a guide channel mounted on the frame, multiple magnetic suction components, a filter component, and a recovery device. The guide channel is inclined to convey a mixture of chips and coolant collected by the machine tool to the filter component. Multiple magnetic suction components are spaced apart along the extension direction of the guide channel. Each magnetic suction component can move independently into the guide channel to magnetically attract the chips in the mixture and can be removed from the guide channel to release the magnetic attraction. The filter component filters out the coolant from the mixture output from the guide channel and separately conveys the coolant and the filtered chips to the recovery device for recycling. This invention removes chips more thoroughly and efficiently. Furthermore, by initially separating the chips with magnetic suction components and then filtering them with the filter component, the processing load on the filter component is reduced, the equipment size is reduced, and the equipment is more conducive to miniaturization.

The application belongs to the technical field of chiral chromatographic separation, and discloses a chiral chromatographic separation and analysis method for homosalate enantiomers. The chiral chromatographic separation and analysis method is used for the first time for homosalate enantiomers, and the chiral chromatographic separation and analysis method selects a mixed solution composed of n-hexane and MTBE (methyl tert-butyl ether) as a mobile phase, and successfully realizes chiral separation of four enantiomers of homosalate on a polysaccharide derivative chiral stationary phase (bonded type straight-chain amylose-tris (3-chloro-5-methyl phenyl urea)). The chiral chromatographic separation and analysis method has high resolution, is simple and easy to operate and control, has low detection cost, and has good stability.

The invention belongs to the technical field of separation and purification of organic compounds, and particularly relates to a method for separating and preparing cis-trans isomers in vitamin K1. The separation and preparation method of cis-trans isomers in vitamin K1 provided by the invention comprises the following steps: dissolving a vitamin K1 crude product in a first organic solvent to obtain a vitamin K1 solution; carrying out supercritical fluid chromatography separation on the vitamin K1 solution, and collecting corresponding eluents according to retention time in a spectrogram obtained by supercritical fluid chromatography separation to respectively obtain cis-isomer of vitamin K1 and trans-isomer of vitamin K1; a mobile phase for supercritical fluid chromatography separation comprises a mixture of supercritical carbon dioxide and a second organic solvent, and the second organic solvent is n-hexane or n-heptane; the filler in the chromatographic column for supercritical fluid chromatographic separation is silica gel. VK1 cis-trans isomers are well separated under the combination of a specific stationary phase and a mobile phase, and the purity of the obtained trans isomers is greater than 99%.

The utility model provides a separate mobile compression box anti -dripping device relates to the field of compression box, this separate mobile compression box anti -dripping device, including stand, the top of stand is provided with drainage ditch, the top one side of stand is fixedly connected with left support framework, the top other side of stand is fixedly connected with right support framework, the top of left support framework is fixedly connected with left guide rail, the top of right support framework is fixedly connected with right guide rail, the inner side of left guide rail and right guide rail all are connected with gyro wheel axle subassembly of rolling, the side of gyro wheel axle subassembly is provided with axle, the inner side of axle is provided with bearing, the outside of bearing is provided with roller, the side of bearing is provided with baffle, this separate mobile compression box anti -dripping device can completely catch the residual drip percolate, and the percolate flows into drainage ditch through steel wire hose, and the concentrated processing does not need manual collection and cleaning.