40results about How to "Fast separation rate" patented technology

The invention discloses a phosphorus doped carbon nitride / carbon nitride homogeneous heterojunction photocatalyst as well as a preparation method and application thereof. The photocatalyst is preparedby taking carbon nitride as a carrier, and the carbon nitride is modified by phosphorus-doped carbon nitride. The preparation method comprises the steps of mixing the phosphorus-doped carbon nitridewith melamine, and calcining the obtained mixture precursor to obtain the phosphorus doped carbon nitride / carbon nitride homogeneous heterojunction photocatalyst. The photocatalyst provided by the invention has the advantages of green and environmental friendlyness, completely free from metal doping, strong in absorption of visible light, large in specific surface area, fast in photo-generated charge separation rate, high in photocatalytic activity, stable in chemical properties, corrosion-resistant, and the like; the preparation method of the photocatalyst has the advantages of simple preparation process, easy control, easy obtaining of raw materials, low cost, is suitable for continuous large-scale mass production, and the like. The photocatalyst provided by the invention can be used fordegrading antibiotic wastewater, and has the advantages of stable photocatalytic performance, high corrosion resistance and high degradation efficiency, thus having a very good practical applicationprospect.

The invention provides suction type pneumatic conveying equipment. The suction type pneumatic conveying equipment comprises a storage cylinder, a conveying pipe, a gas pipe, a fan and a separating cylinder; the separating cylinder is embedded and welded in the top of the storage cylinder; the conveying pipe is embedded and welded in one side of the separating cylinder; the gas pipe is embedded andwelded in the other side of the conveying pipe; one end of the gas pipe is embedded and welded in the fan; a discharge pipe is embedded and welded in the bottom of the storage cylinder; the bottom ofthe discharge pipe is sleeved with a screw cap in a threaded mode; one side of the conveying pipe is welded to the storage cylinder through a support rod; a carrier plate is welded to the top of theseparating cylinder; and a motor is welded to the top of the carrier plate. A separating pipe is driven by a disc to rotate at a high speed, in the movement process of the separating pipe, due to rotation of the separating pipe, the separating pipe can lay down materials in the separating pipe before the materials fall off from the separating pipe, so that the materials fall into the separating cylinder, the materials are completely separated from airflow, and thus the materials can be completely separated from airflow just through one time of separating.

The invention discloses a hollow tubular carbon nitride photocatalyst and a preparation method and application thereof. The hollow tubular carbon nitride photocatalyst is prepared from urea and melamine by hydrothermal and calcination, wherein the molar ratio of urea to melamine is (1-5):1. The hollow tubular carbon nitride photocatalyst has the advantages of large specific surface area, large number of holes, fast separation and migration rate of photogenerated carriers, high light absorption capacity, high photocatalytic activity and the like. The novel visible light photocatalyst is novel in morphology and structure and excellent in photocatalytic performance. The preparation method of the hollow tubular carbon nitride photocatalyst has the advantages that the process is simple, operation is easy, the cost is low and no secondary pollution is caused. The method is suitable for large-scale preparation and facilitates industrialized application. The photocatalyst can degrade organic pollutants, can achieve the efficient removal of the organic pollutants, and has the advantages of being simple in process, convenient to operate, low in cost, high in processing efficiency, good in removal effect and the like. The photocatalyst has good application value and prospects.

The invention discloses an ultrasonic leaching-extracting separating method of low-yttrium middle-heavy typed rare earth ore, which is characterized by the following: adopting low-yttrium middle-heavy typed rare earth ore as raw material and alcaine solution as leaching liquid; blending P507 or P204 and kerosene as extracting liquid; leaching low-yttrium middle-heavy typed rare earth ore to extract and separate at 5-60 deg.c; setting the ultrasonic frequency at 19-80kHz and ultrasonic strength at 0.2-20.0W / cm2; obtaining yttrium rare earth element hydrochlorate enriched material as extracting phase and cerium group rare earth hydrochlorate enriched material as residual phases.

The invention provides an aperture-controllable CS / PLA oil-water separating nanometer fiber film and a preparation method thereof, and the preparation comprises the steps of dissolving PLA in a solvent to obtain a PLA solution; dissolving CS in a solvent to obtain a CS solution; mixing the PLA solution and the CS solution and adding waterless ethanol and stirring for 3-5 h to obtain a uniform sol spinning liquid. The aperture-controllable CS / PLA oil-water separating nanometer fiber film can be obtained by static spinning, peeling and drying. The CS / PLA oil-water separating nanometer fiber film is obtained by static spinning; and the aperture among fibers is controlled by adjusting mesh number of a receiving net. Therefore, the process is simple, the cost is low; the process is green and has no pollution, and the film can be conveniently applied. The prepared nanometer fiber film has a relatively high oil separation efficiency; the separating speed is fast; the separating effect is good; the film can be repeatedly used; the film has a good stability; a stable separating efficiency to oil-and-water mixture of different pH values can be maintained.

The invention discloses a method for treating organic pollutants and photocatalytic sterilization by using a modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst, which comprises the following steps: the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and organic pollutant wastewater or bacteria solution are mixed for photocatalytic treatment to finish the treatment of the organic pollutant or bacteria, the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst is prepared by taking hollow tubular carbon nitride as a carrier and the carrier is loaded with modified carbon quantum dots, wherein the hollow tubular carbon nitride is prepared from urea and melamine in a molar ratio of 1-5:1 and melamine through hydrothermal treatment and calcination. The method has the advantages of simple process, convenient operation, simple equipment, low cost, high treatment efficiency / photocatalysis efficiency, good removal effect / sterilization effect, cleanness, no pollution and the like, and has high application value and commercial value.

The invention relates to the technical field of a material, and discloses a CoFe<2>O<4> / g-C<3>N<4> magnetic nanomaterial and a preparation method therefor. The preparation method comprises the steps of preparing g-C<3>N<4> nanosheets, and dispersing the g-C<3>N<4> nanosheets into ethylene glycol; then adding FeCl<3>.6H<2>O and CoCl<2>.4H<2>O and fully dissolving; and finally adding sodium acetate, stirring and calcining in a drying oven, and finally obtaining black sediments CoFe<2>O<4> / g-C<3>N<4>. According to the CoFe<2>O<4> / g-C<3>N<4> magnetic nanomaterial disclosed by the invention, the CoFe<2>O<4> nanoparticles are uniformly distributed on the g-C<3>N<4> nanosheets, so that CoFe<2>O<4> nanoparticle agglomeration can be prevented, and more active sites are provided to improve catalytic activity; in addition, the CoFe<2>O<4> nanoparticles are magnetic, so that the particles are distributed on the g-C<3>N<4> nanosheets sequentially to form bigger planar nanomaterials; and the planar nanomaterials can be separated more quickly under a magnetic field compared with independent CoFe<2>O<4> nanomaterials.

The invention discloses a petroleum associated gas separation process, which belongs to the technical field of associated gas separation. The separation process includes the following steps: a pretreatment step, a gas-liquid separation step, a CO 2 separation step, gas recovery step; the CO 2 In the separation step, a composite membrane is used to separate carbon dioxide. The composite membrane has a three-layer structure with a polysulfone membrane layer on the surface, a gel filtration layer on the middle layer, and a non-woven fabric layer on the bottom layer. The petroleum associated gas separation process disclosed by the invention can separate carbon dioxide and methane. The composite membrane used in the membrane separation step has high porosity and selectivity, high permeation flux, and is not easily deformed. The separation process disclosed by the invention has good separation effect, compact equipment, and environmental friendliness.

The invention discloses a rod-shaped Cu x O photocatalytic material and its preparation method and application, the method is as follows: (1) adding anhydrous copper sulfate, cetyltrimethylammonium bromide and water into a beaker, stirring evenly to obtain a mixed solution; (2) Add the egg membrane into the beaker, stir evenly to obtain a suspension; (3) transfer the suspension to the eggshell and place it in a beaker filled with sodium hydroxide solution, and then carry out an oil bath reaction; (4) transfer the obtained The solution is centrifuged, the product is collected, washed, and dried to obtain a sample; (5) The sample is calcined to obtain a copper-based photocatalytic material for visible light photocatalytic antibacterial. The present invention uses egg shells as a reactor to prepare Cu under mild conditions. x O rod-shaped photocatalytic material, the rod-shaped structure makes the obtained material have a larger specific surface area, and at the same time exposes more surface active sites, effectively improving its visible light photocatalytic antibacterial activity.

The invention discloses a molybdenum carbide modified tubular carbon nitride photocatalytic material and a preparation method and application thereof. The molybdenum carbide modified tubular carbon nitride photocatalytic material comprises molybdenum carbide and tubular carbon nitride, wherein the surface of the tubular carbon nitride is modified with the molybdenum carbide. The preparation methodcomprises the steps: suspending the tubular carbon nitride in methanol, so as to obtain a suspension; dispersing the molybdenum carbide in the suspension, carrying out intensive mixing, and carryingout drying, thereby obtaining the molybdenum carbide modified tubular carbon nitride photocatalytic material. According to the molybdenum carbide modified tubular carbon nitride photocatalytic material disclosed by the invention, an energy band structure of the carbon nitride is improved to form molybdenum carbide / carbon nitride heterojunction, so that the effective separation of photoproduction electron-hole pairs is achieved, the utilization efficiency of photoproduction electron-holes is increased, and the effect of photocatalytic degradation is promoted; the molybdenum carbide modified tubular carbon nitride photocatalytic material can be applied to degradation of antibiotics or dyes in wastewater.