46results about How to "Solve separation and recycling" patented technology

The production process with p-nitrophenol material includes catalytic hydrogenation with Ni, Al or other metal catalyst with the reactant material being pumped to circulate between reactor and inorganic memobrane assembly; repeated filtering of circular material through inorganic membrane with the liquid phase product passing through the membrane pores; the conventional treatment of the collectedliquid phase product to obtain p-aminophenol crystal product; and the recovery and reuse of the solid catalyst in circular flow and finally in the reactor. During the process, fine suspended catalystis separated and recovered continuously.

The invention provides a nano-grade ZnO loaded magnetic biological carbon composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: step 1: carrying out thermal hydrolysis on a biomass under an alkaline condition to extract plant fibers; after drying, carrying out pre-carbonization treatment; mashing and sieving with a sieve with the size of 10to 20 meshes; step 2: mixing a ferrous salt solution and a potassium hydroxide solution; adding soluble zinc salt; step 3: adding the sieved plant fibers into the solution formed by step 2; uniformlymixing and adding a potassium nitrate solution; after sufficiently stirring, treating a mixture in a water bath; continuously stirring and ageing until black gel is formed, so as to obtain a black gel solution; step 4: after washing and drying the black gel solution, generating dry gel; calcining the dry gel and continuously introducing inert gas; after washing and drying, obtaining the nano-grade ZnO loaded magnetic biological carbon composite photocatalyst. According to the nano-grade ZnO loaded magnetic biological carbon composite photocatalyst, magnetic biological carbon is used as a carrier of the photocatalyst, and the problem that the photocatalyst in chromium-containing sewage treatment is difficult to separate and recycle is solved.

The invention discloses a process for synthesizing sucrose polyester, particularly a process for synthesizing sucrose polyester by using a rotating film transesterification flow reactor. The process comprises the following steps: methyl oleate, sucrose powder, potassium stearate and potassium carbonate are added into a mixing kettle, and heated while stirring; the materials enter the rotating film transesterification flow reactor to react; the crude fatty acid sucrose polyester product obtained after the reaction enters a product storage tank, and the reaction product methanol enters a methanol receiver after being cooled by a condenser; and the crude product in the product storage tank is neutralized with acetic acid, washed and dried to obtain the sucrose polyester product. The low-boiling-point substances generated in the process provided by the invention are quickly removed out of the reaction system, thereby being beneficial to the generation of the product, greatly increasing the reaction speed and enhancing the product quality. The process can be used for continuous-feeding production, is beneficial to large-scale production, enhances the production efficiency, has the advantages of high yield and simple process, lowers the production cost and raises the resource utilization ratio.

The invention relates to a bimetal supported magnetic visible-light composite catalytic material, and a preparation method and application thereof, belonging to the technical field of photocatalytic degradation. The invention provides the bimetal supported magnetic visible-light composite catalytic material, and the preparation method and application thereof to overcome problems in realization ofboth high catalytic activity and easy recoverability. The visible-light composite catalytic material comprises Fe/Zr-MOF, Fe3O4 and g-C3N4. Fe3O4 is doped into g-C3N4 to form Fe3O4-g-C3N4; and Fe/Zr-MOF is used as a carrier. The method comprises the following steps: adding urea and Fe3O4 into a solvent, carrying out dispersion and mixing, and performing desolventization and drying; then performingcalcining at a high temperature to obtain Fe3O4-g-C3N4; and adding Fe3O4-g-C3N4, an iron source, a zirconium source and an organic ligand into a water-soluble solvent and performing sintering. The composite catalytic material can be used for catalytic degradation of organic pollutants, is easy to recover and has high catalytic activity.

The invention discloses a composite modified montmorillonite photocatalysis material and a preparation method thereof. The photocatalysis material comprises sodium montmorillonite, an organic intercalator, an alcohol solution of butyl titanate, an alkaline solution, a zinc salt, distilled water and ethylene glycol. The method comprises the following steps: organically modifying the sodium montmorillonite with a long-chain alkyl group ammonium salt as the organic intercalator to obtain organic pillared montmorillonite, dropwise adding the alcohol solution of butyl titanate to the alkaline solution, performing stirring and reacting to obtain an intermediate, centrifuging and washing the intermediate, adding the washed intermediate to a nitric acid solution, stirring the intermediate and thenitric acid solution to dissolve the intermediate, adding the above organic montmorillonite suspension, and filtering, washing, drying and milling the obtained product to obtain the nanometer titaniumdioxide interlayer-loaded modified organic montmorillonite. The method has the advantages of simplicity in operation, low cost, and realization of energy saving and environment protection through omitting high-temperature sintering and ball milling processes due to physical and chemical reactions involved in the whole preparation process being low-temperature reactions.

The invention discloses a method for preparing GBL (Gamma-Butyrolactone) by taking furfural as a raw material. The method comprises two steps of oxidizing the furfural to prepare 2(5H)-furanone and hydrogenating the 2(5H)-furanone to prepare the GBL, wherein the 2(5H)-furanone can be synthesized by the furfural by taking homogeneous-phase acid or solid acid as a catalyst and taking hydrogen peroxide as an oxidant under the conditions of mild temperature and pressure. The 2(5H)-furanone is further selectively hydrogenated to obtain the GBL under the effect of a metal catalyst in a hydrogen atmosphere. The GBL can be generated by commonly hydrogenating the 2(5H)-furanone serving as a main product and C4 binary acid serving as a byproduct of the oxidation of the furfural in situ under appropriate conditions. According to the method, high-efficiency conversion from the furfural serving as a biomass raw material to the GBL serving as a fine chemical product is realized; the method has a great application prospect.

The invention discloses a ceramic membrane of a loaded nanometer wire photocatalyst and a preparation method thereof. The ceramic membrane comprises a ceramic membrane carrier, a catalytic active component and a modifying agent. The preparation method of the ceramic membrane comprises the steps of preprocessing of the ceramic membrane carrier, preparing the modifying agent, modifying the ceramic membrane carrier, preparing the catalytic active component, loading the catalytic active component to the modified ceramic membrane carrier, and obtaining the nanometer material loaded ceramic membrane; utilizing the obtained nanometer material loaded ceramic membrane for performing a photocatalytic degradation experiment on Rhodamine B, wherein the degrading rate for Rhodamine B is 98.6% or more,and the recycling rate is 90% or more. Experiment results show that the catalytic active component is loaded on the modified ceramic membrane carrier, the purpose of separating and recycling the catalytic active component is achieved, and due to loading, the catalytic performance of the catalytic active component is correspondingly improved.

The invention belongs to the technical field of chemical industry and relates to a device and a method for preparing acetoxime. The acetoxime is prepared from acetone, tertiary butanol, water, ammonia water and hydrogen peroxide by using an integrated TS-1 molecular sieve as a catalyst (an integrated titanium silicalite molecular sieve serves as a catalyst) and through liquid solid phase acetone ammoxidation. The device comprises a condenser, an integrated reactor and an external circulation pump. The integrated TS-1 catalyst (the integrated titanium silicalite molecular sieve serves as the catalyst) synthesized by using frustum-shaped cordierite as a carrier is loaded in the integrated reactor and is applied to preparation of the acetoxime. By adoption of the frustum-shaped cordierite carrier in the device, the wall flow phenomenon can be effectively avoided, so that activity of the catalyst and catalytic efficiency of the reactor are greatly improved. By the device and the method, the problem that the traditional powdered catalyst is difficult to recycle is solved. The device and the method have a wide market application prospect.

The invention discloses a system and a method for separating and recovering chlorine salts based on fly ash plasma melting. The method comprises the following steps: high-salt and high-acid wastewater enters a wastewater regulating tank, and is homogenized, the wastewater is lifted into a coagulating sedimentation tank by a feeding pump, a reagent is added into the coagulating sedimentation tank, heavy metals and suspended matters in the wastewater are removed, solid-liquid separated wastewater in the sedimentation tank goes through an intermediate water tank, is pumped into a filtering or softening system by a pump, and is deeply treated, the obtained high-salt water enters an evaporative crystallization system, and undergoes sodium chloride and potassium chloride step-by-step separation, and the obtained mother liquor returns into the coagulating sedimentation tank to separate sulfates. The method and the system effectively remove pollutants in water, recover reuse water, can specially develop a sodium, potassium, chlorine and sulfate radical quaternary system salt separation system to obtain industrial byproducts meeting corresponding standards, solve the problem of separation and recovery of impurity salts in the "zero emission" process of high-salt wastewater, and also solve the problem of reuse of secondary fly ash after plasma melting.

The invention relates to a preparation method of a Gd-TiO2-SiO2-NiFe2O4 composite magnetic material. The preparation method comprises the following steps: firstly preparing Gd-doped TiO2; then preparing NiFe2O4 powder; then preparing a SiO2/NiFe2O4 composite material; finally weighing 1-2g of Gd-doped TiO2 powder, adding 1mL of absolute ethyl alcohol, preparing into slurry by using a glass rod, then adding 10ml of a prepared Gd-doped TiO2 sol, and uniformly stirring to obtain a powder-sol precursor solution; and then adding 2-3g of a magnetic matrix into the powder-sol precursor solution, drying at 50-70 DEG C, calcining for 1.5 hours at 480 DEG C, taking out and quenching, grinding and magnetically sorting to obtain the Gd-TiO2-SiO2-NiFe2O4 composite magnetic material catalyst. According to the invention, a gadolinium-doped titanium dioxide-doped photocatalyst is fixed and can improve the TiO2 photocatalytic activity and expand the spectral response range of TiO2, so that industrial application and popularization of the TiO2 photocatalyst are facilitated.

The invention discloses a continuous reaction method for catalyzing the epoxidation of hydrogen peroxide oxyalkylene. The method comprises the following steps: carrying out azeotropic treatment on water and components (solvent) in reaction liquid so as to remove most of water (water in hydrogen peroxide) in a system and then form an anhydrous hydrogen peroxide solution; adding olefin and a phase transfer catalyst, carrying out epoxidation reaction at certain temperature, and cooling the obtained object; and separating and recovering the catalyst for two times by using a horizontal screw decanter centrifuge and a butterfly separator, wherein the catalyst can be recycled; and carrying out further rectification and separation on a liquid phase obtained by separating, so as to obtain a product; and recycling a mixed solvent again.

The invention discloses a process for coating a Bi2O3/TiO2 photocatalysis film on the surface of a hollow lightweight glass sphere and discloses application of the hollow lightweight glass sphere with a surface coated with the Bi2O3/TiO2 photocatalysis film. According to the process, bismuth nitrate, titanium tetrabutoxide, nitric acid, water, pentanediol, polyethylene glycol, acetylacetone and the like are adopted for forming a precursor solution; the sphere is rotatably coated with a film and then is quickly dried to obtain the uniform Bi2O3/TiO2 catalyst film; the glass sphere with the Bi2O3/TiO2 photocatalysis film coated on the surface is placed into a suspending type photocatalysis reactor and can be used for degrading organic pollutants such as methyl orange under illumination, and the glass sphere is excellent in photocatalysis performance; the process has the advantages that the raw materials are easily available, the preparation cost is low, the film coating process is simple, and the condition is easy to control; and the liquid film on the surface of the glass sphere is thin, has high light transmittance and high transfer efficiency, does not need to be separated and recycled and is capable of continuously working; and simultaneously, the process provides reference value respect to other film coating technologies and brings basic theoretical basis for designing and amplifying the photocatalysis reactor in future.

The invention discloses a method for producing vanadium pentoxide from a vanadium-containing solution. The method specifically comprises the following steps: adding a copper-containing reagent into asolution of vanadic acid or vanadate, adjusting the pH value to precipitate the vanadium or vanadium and chromium in a copper salt form, performing filtration to obtain vanadium-enriched residues anda vanadium-precipitated liquid, directly returning the vanadium-precipitated liquid to the vanadium leaching procedure for cycle use, or removing sodium and returning the sodium-removed vanadium-precipitated liquid to the vanadium leaching procedure for continuous use, performing acid leaching on the vanadium-enriched residues, performing filtration to obtain a pure hydrated vanadium pentoxide filter cake, and calcining the hydrated vanadium pentoxide to obtain the vanadium pentoxide product. The method has the advantages of simple process, convenience in operation, low production cost, good product quality and the like, and is suitable for industrial application.

The invention discloses a nanometer floating type supported photocatalyst and a low-temperature preparation and application method thereof. The preparation method comprises the following steps of: firstly mixing the alcohol solution of butyl titanate and censphere floating beads sufficiently and evenly, loading the butyl titanate onto the censphere floating beads through a rotary evaporation method, and carrying out the outphase hydrolysis reaction of the censphere floating beads loaded with the butyl titanate to form Tio2 floating beads containing water; and then mixing the Tio2 floating beads containing water with water, cooling down, filtering, cleaning, drying the mixture in the vacuum after a crystallization reaction, and obtaining the photocatalyst. The invention can not only obtain the high-activity photocatalyst at a low temperature, but also avoid the high-temperature after-treatment step of the floating type supported photocatalyst, thereby effectively reducing the energy sources consumed in the preparation process, simultaneously avoiding the sloughing of the carrier and the agglomeration of the catalyst during the subsequent high-temperature sintering process of the supported catalyst, and realizing the degradation of organic pollutants such as oil floating on the water surface through the photocatalyst with high efficiency.

The invention provides a method adopting the microbe microbial enhanced oil recovery (MEOR) technology for water-based extraction of bitumen in oil sands and belongs to the field of oil sand separation technology. According to the method, the MEOR technology is adopted to perform the cultivation treatment of microbial bacteria before the water-based extraction to the oil sands, and the physico-chemical property of the oil sands is influenced through the selective action of the microbial bacteria on certain macromolecular materials in the bitumen in the oil sands, so that the recovery rate of the bitumen is effectively increased, the quality of the bitumen is improved, and the problems in bitumen separation recovery of oil sand mines, particularly high-electrolyte and high-clay-content oil sand mines, weathered oil sand mines or other mines which are difficult to treat. The practice proves that through the adoption of the method provided by the utility model for water-based extraction of the bitumen in the oil sands, the recovery rate is up to 98 percent. Therefore, the method has a favorable application prospect in industrial production of oil sand separation extraction.

The invention discloses a waste optical cable stripping, classifying and recycling device which comprises a shell, a working cavity is formed in the shell, a feeding port is formed in the left side wall of the working cavity in a penetrating mode, and a feeding device for feeding waste optical cables into the device is arranged on the right side of the feeding port. The feeding device comprises two guide rollers which are vertically symmetrical about the feeding port, the right side of each guide roller is provided with an annular cutting device used for cutting the waste optical cable, and byarranging an annular cutting mechanism, the outer wall of the optical cable entering the device is cut through gear engagement transmission. The outer wall of the optical cable is fixed by opening the outer wall of the optical cable inside the optical cable and pricking the outer wall of the optical cable outside the optical cable at the other end of the cutting mechanism, the purpose of stripping the outer wall of the optical cable is achieved by arranging the traction mechanism, and the outer wall and optical cable cores fall into the two collection cavities for classified collection treatment.