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797results about How to "Good regeneration performance" patented technology

Nano-bionic material for tissue repair and preparation method thereof

ActiveCN101829361AImprove regenerative abilityTo achieve the effect of graft repairProsthesisNano-scaffoldTissue repair
The invention provides a nano-bionic material for tissue repair and a preparation method thereof. The nano-bionic material comprises a nano-bionic bracket and hydrosol attached to the nano-bionic bracket, wherein one or more cell factors and / or cells are coated in the hydrosol. The preparation method of the nano-bionic material comprises the following steps of: preparing an electrospinning solution and a hydrosol solution containing the cell factors and / or the cells; preparing the nano-bionic bracket by using the electrospinning; printing the hydrosol solution containing the cell factors and / or the cells on the nano-bionic bracket by using a ink-jet printer; and the like, and repeating the electrospinning and the ink jet to obtain the nano-bionic material with different thicknesses. By combining with an electrospinning technology and a biological printing technology, the invention combines specific medicines and / or the cell factors and / or the cells in the nano-bracket and / or the surface of the nano-bracket, thereby greatly enhancing the effects of the nano-bionic material on tissue repair and tissue regeneration; in addition, the invention has broad application prospect.
Owner:MEDPRIN REGENERATIVE MEDICAL TECH

Method for preparing premixed dry powder of plant tissue culture medium

The invention belongs to the field of agricultural biotechnology, particularly relating to a method for preparing premixed dry powder of a plant tissue culture medium. The method for preparing the premixed dry powder of the plant tissue culture medium comprises the following steps of: (1) preparing trace mineral elements, organic matters and iron salts into mother liquors respectively; (2) adding agar into the trace mineral element mother liquor, the organic matter mother liquor and the iron salt mother liquor respectively, boiling into solutions, cooling, then placing in a thermostat for 6 to 7 days and drying, and crushing and sieving; (3) weighing each macroelement composition, placing in the thermostat and drying, grinding, sieving and uniformly mixing; and (4) uniformly mixing the prepared powder according to a formula, and drying and storing at room temperature. The plant tissue culture medium prepared with the method has the advantages of stable property, light weight, no need of low-temperature storage, convenience in storage, transportation and use and contributes to being used by most of laboratories and tissue culture enthusiasts.
Owner:HENAN UNIV OF SCI & TECH

Modifying method for naphtha and light hydrocarbon aromatization

A modifying method for naphtha and light hydrocarbon aromatization comprises: contacting naphtha and C3-C5 light hydrocarbon with aromatization catalyst in the presence of hydrogen-containing gas to carry out aromatization modifying reaction, wherein the reaction temperature is 250-600 DEG C, and the volume ratio of hydrogen to naphtha is 20-400. The method can convert naphtha with low octane value and low-carbon hydrocarbon into gasoline component with high octane value and excellent liquefied gas, the final distilling point of liquid product and the carbon-accumulating speed of catalyst areobviously reduced, and the service life of catalyst is prolonged.
Owner:CHINA PETROLEUM & CHEM CORP +1

Regeneratable wet fuel gas desulfurizing technology

The invention discloses a reproducible wet flue gas desulfurization technique, which solves the problems of the prior art of high operation cost and high loss rate when absorbent is in use. The invention is characterized in that after going through a washing tower, flue gas containing gas SO< X > is then connected with the absorbent in a reverse flow in an absorption tower; the purified flue gas is discharged into the atmosphere; a portion of pregnant solution absorbent directly returns to the absorption tower for circular application, wherein SO2 of the flue gas is absorbed by the pregnant solution; a portion of air stripping is used circularly after a regeneration. The invention has the advantages that the energy consumption and operation cost of the technique are low, and loss of the absorbent is small.
Owner:CHINA PETROCHEMICAL CORP +1

Preparation method of efficient polyethyleneimine modified cellulose-based heavy metal adsorbent

The invention discloses a preparation method of an efficient polyethyleneimine modified cellulose-based heavy metal adsorbent shown by a formula (I), belonging to the technical field of high-molecular function modification and synthesis of a natural material. By adopting cellulose as a framework, benzoyl peroxide (BPO) as an initiator, a mixture of water and acetone as a solvent and glycidyl methacrylate (GMA) shown by a formula (III) as a monomer, the method comprises the following steps of: performing a free radical-initiated graft copolymerization reaction on the surface of microcrystalline cellulose shown by a formula (II); performing amination on a graft product shown by a formula (IV) by use of graft polyethyleneimine (PEI) shown by a formula (V); and washing and drying the product to obtain a powdery solid product, wherein the reaction is easy to operate, and the conditions are mild. The heavy metal adsorbent prepared by the preparation method has the advantages of excellent adsorption property, large adsorption capacity and fast adsorption, can be regenerated and recycled, and has broad application prospects in the water treatment fields such as control of heavy metal industrial pollutants and the like.
Owner:SHANDONG UNIV

Asphalt recycling agent for hot recycling of asphalt on asphalt road surface

The invention discloses an asphalt recycling agent for hot recycling of asphalt on an asphalt road surface. The recycling agent comprises the following components by weight: 19-70% of an aromatic oil, 20-60% of heavy oil, 5-30% of liquid petroleum resin and 0.2-1% of a stabilizer. The invention also provides a preparation process of the asphalt recycling agent and a method for preparing recycled asphalt by use of the asphalt recycling agent. The recycling agent disclosed by the invention is good in recycling effect, easy for raw materials purchase, stable in quality, low in equipment investment, simple in processing steps, short in processing time of finished products, good in storage stability, stable in physicochemical property, and convenient for on-site operation, and is suitable for on-site hot recycling construction as a special recycling agent.
Owner:YINGDA HEAT REGENERATION

Molecular sieve absorbent

The invention relates to a molecular sieve sorbent, in particular to a flue gas desulphurization sorbent applicable to the treatment of SO2 in boiler flue gas. The sorbent comprises the following compositions by mass percentage: 0.1 to 5 percent of V2O5, 4 to 30 percent of CuO and 65 to 95.9 percent of silicon-aluminum molecular sieve. The molecular sieve sorbent takes molecular sieve as a carrier and contains vanadium and copper at the same time; moreover, a small amount of boron, aluminum, magnesium, titanium, chromium, manganese, iron, cobalt, nickel, zinc, zirconium, molybdenum, argentum, platinum, rhenium, or one or more elements in lanthanide or corresponding oxides can be added in the molecular sieve sorbent. The sorbent has the advantages of high adsorption capacity, excellent reproducing property, long service life and the like, and is not only applicable to flue gas desulphurization, but also applicable in gas purification fields such as CO removal and nitrogen oxide reduction.
Owner:PETROCHINA CO LTD

Absorbing desulfurizing catalyst for catalytic cracking petroleum and preparing method thereof

InactiveCN1583962ASuitable for desulfurizationOctane has little effectHydrocarbon oils refiningNano zinc oxidePetroleum
A kind of catalyst for Fcc gasoline's adsorption desulfuration contains in weight percent: 10-85% nano zinc oxide, the atomic diameter of which is 100-500 mu m, 5-80% silica oxide, 5-30% alumina oxide, and 4-45% nickel oxide. The method of preparation is: (1) Mix evenly the nano zinc oxide, silica oxide, alumina oxide, and nickel oxide; dry the particle of step (b); roast the dry particle of step(c); deoxidize the particle of step(d) by proper reductant. The portions of this catalyst remain mixed, and the method adopts the technology of roasting. The catalyst has a good strength, high desulfuration activity, and effective regeneration. Because of the adoption of nano zinc oxide, it causes little to octane number and applies to desulfuration of FCC gasoline. Moreover, the method of preparation is simple and the operation is easy.
Owner:SINOPEC QILU CO

Regenerable heterogeneous Fenton catalyst, and preparation method and application thereof

The invention specifically relates to a regenerable heterogeneous Fenton catalyst, and a preparation method and application thereof, which belongs to the technical field of industrial catalysts. The catalyst provided by the invention uses commercial zeolite as a carrier and is prepared through the following steps: surface modification of the carrier with a high polymer; loading of an active component Fe or Co; and roasting so as to form an iron or cobalt compound-valence oxide on the surface of zeolite. The catalyst shows high-efficiency degradability to industrial intractable organic waste water containing phenols, dyes or the like, and the degradation rate of organic matters in waste water is up to more than 90% at room temperature (less than 30 DEG C) under an almost neutral condition (wherein a pH value is in a range of 6 to 8); and the catalyst has good regeneration performance. According to the method, the heterogeneous Fenton catalyst is used for oxidation removal of organic matters like phenols and dyes in waste water, so cost is low and no secondary pollution is produced; and a process for treating waste water with the Fenton catalyst is a promising organic waste water treatment process.
Owner:FUDAN UNIV

Method for regenerating titanium-silicon molecular sieve catalyst

The invention provides a catalyst used as a titanium-silicate molecular sieve in the process of preparing epoxide from olefin and hydrogen peroxide. The invention is characterized by comprising the following steps: washing with or without a small amount of methanol solvent; purging the catalyst cake with steam directly after reaction; extracting few organic matters absorbed in the catalyst; then stirring in a regenerating kettle and dropwise adding H2O2 with a certain concentration simultaneously; removing the organic matters and low polymers absorbed on the catalyst and in a pore path through oxidative decomposition; and finally, washing with a small amount of methanol or deionized water to remove the organic acid generated by oxidation on the surface of the catalyst. The regenerated catalyst can be circularly used for the epoxidation reaction of olefin to stably maintain the activity of the epoxidation reaction.
Owner:JIANGSU YANGNONG CHEM GROUP +2

Ferrum carried spherical cellulose adsorbent, preparation and application thereof

The invention relates to a kind of globe-form cellulose absorbent with iron carrying and its manufacturing and application. The carrying agent of the invention is globe-form cellulose, and the active center is the hydroxide of iron in the specific form, which has the high absorption activity. The manufacturing feature is as follows: dropwise alkali solution tardily into the solution of cellulose bead and molysite; in stirring condition, iron can load the cellulose bead by dispersing and hydrolyzing; after loading repeatedly and frequently, use the alkali solution to stabilize the ferruginous form. The manufacturing method of the absorbent has the advantages of environmental protection, novelty, simplicity and low cost. Moreover, it can remove arsenic, fluorine and other heavy metal with high efficiency and high selectivity, and the absorbent has excellent usage-prospect in nowadays.
Owner:NANKAI UNIV

Composite type mercury ion adsorbent and preparation method thereof

The invention relates to a composite type mercury ion adsorbent and a preparation method thereof. The adsorbent consists of chitosan, polyvinyl alcohol and clay. A polyvinyl alcohol macromolecular chain and a chitosan macromolecular chain are penetrated and wound mutually by high-speed stirring, so that the inorganic clay is dispersed fully; and the release of the chitosan and the polyvinyl alcohol in the process of using the adsorbent is avoided effectively by a method of combining cross linking agent cross linking and freezing crossing linking of glutaraldehyde. The adsorbent has high adsorption capacity and high adsorptive selectivity on Hg(II) ions, hardly adsorbs Cd(II) and Pb(II) ions, and adsorbs a small amount of Cu(II) ions, and can be recycled, and adsorbability of the adsorbentis slightly influenced by the pH value of a solution. The integral preparation process is performed in an aqueous solution, the preparation method is simple and convenient, low in energy consumption,low in production cost, environment-friendly, and easy to industrialize, and special process equipment is avoided.
Owner:XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI

Method for removing thermostable salt in amine liquid for desulphurization

The invention discloses a method for removing heat-stable salts in amine desulphurization, aiming at solving the problem that the prior art has difficulty in treating desulphurizer with high content of sulfate radical. The method is as follows: strong base type II anion exchange resin with particle size of 0.5-1.5mm is filled in an ion exchange resin tower with height-diameter ratio of 1:1-3:1, the desulphurized amine solution with PH value less than 5.4 passes through the ion exchange resin tower at the airspeed of 30h-50h to experience purifying treatment, when the PH value of the desulphurized amine solution at the exit of the resin tower is equal to that at the entrance of the resin tower, sodium hydroxide solution is used to carry out upflow regeneration on the ion exchange resin, and the regenerated ion exchange resin is recycled. The method can solve the problems of rapid cumulative rate and large total content of the sulfate radical in reproducible wet method flue gas desulphurization system.
Owner:LUOYANG PETROCHEMICAL ENG CORP SINOPEC

Carbon heterostructure material/β-cyclodextrin composite modified electrode and preparation method

The invention relates to a carbon heterostructure material / beta-cyclodextrin complex modified electrode and a preparation method thereof, belonging to the technical field of electrochemical analysis and detection. The carbon heterostructure material / beta-cyclodextrin complex is loaded on the surface of a glassy carbon electrode and forms a uniform film on the surface of the electrode, the content of carbon heterostructure materials on the surface of the electrode is 3.40-20.80mu g.cm<-2>, and the content of the beta-cyclodextrin on the surface of the electrode is 17.00-79.30mu g.cm<-2>. The carbon heterostructure material of the modified electrode is obtained through hybridization of two-dimensional grapheme and a one-dimensional carbon nanotube and is further compounded with the beta-cyclodextrin with supramolecular properties, an appropriate amount of mixture suspension is dropped on the clean surface of the electrode and is dried naturally, and thus the carbon heterostructure material / beta-cyclodextrin complex modified electrode can be obtained. The invention has the advantages of simple process, low cost, high sensitivity, low detection limit and good repeatability and reproducibility. The carbon heterostructure material / beta-cyclodextrin complex modified electrode can be applied in rapid and high-sensitivity onsite detection in the medical, environmental, food andother fields.
Owner:BEIJING UNIV OF CHEM TECH

Wall flow type net plate apparatus with reverse jet regenerating unit for collecting microparicle discharged by diesel vehicle

This invention discloses a converse regenerating wall flow type metal net plate apparatus for collecting microparticle discharged by diesel vehicle. The composite metal plate masking filter layer inclined certain angles in outer shell, 'WW' type is formed through baffle. Extension room is set between air intake and the filter layer, the room is connected to scavenging valve and carbon smoke second collecting device. Pneumatic disc valve, blowback cavity and air compress air tank at one side of the gas outlet are connected to the shell. Waste gas discharged by the engine enters from collector intake, and particles in the waste gas are entrapped when it flows through 'WW' type composite metal shadow masking. Discharging back pressure ascends when the particles deposit to certain quantity, and the regenerating equipment starts to blow out the accumulative particles from filter, and the particles are second collected and burned in collector. The structure is simple, cost is low, purification effect and regeneration effect is good, life is long and a good product for generalization.
Owner:TSINGHUA UNIV +1

In-situ regeneration method for molecular sieve catalyst

The invention discloses an in-situ regeneration method for a molecular sieve catalyst, which is characterized by comprising the following technology steps of: (1) purging the inactivated molecular sieve catalyst by using a mixture of air, nitrogen and light hydrocarbons to remove a reactant; (2) after the gas purging, purging by using vapor of a mixture of water, methanol, ethanol and propanol; (3) supplementing nitrogen until a regeneration pressure reaches 0.5-5 MPa; adding into a regeneration mixed solution, wherein an oxidizing substance in the mixed solution is peroxide, a solvent is a mixture of alcohol and water, a regeneration temperature is 30-140 DEG C, a mass airspeed is 0.5-5 h<-1>, and a regeneration time is 2-20 hours; (4) purging the regenerated molecular sieve catalyst by using vapor of a mixture of water and alcohol; and (5) after the vapor purging is completed, purging by using mixture of air and hydrocarbons.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Process of producing inner tube material with waste butyl rubber inner tube

InactiveCN101066617AQuality improvementAppropriate quality and performance needsPlastic recyclingWaste rubberEngineering
The process of producing inner tube material with waste butyl rubber inner tube includes the steps of: sorting material, cleaning, sunning, crushing, compounding, desulfurizing, cooling, refining, filtering and sheeting off. The process is simple, low in production cost, high in yield and high in regeneration effect, and the regenerated material has high quality and may be used in producing new inner tube. The process of the present invention may be applied widely in regenerating waste rubber.
Owner:LIAONING WANLAI TIRE

Method for regenerating titanium-based vanadium-series SCR (Selective Catalytic Reduction) denitration catalyst

The invention relates to a method for regenerating a titanium-based vanadium-series SCR (Selective Catalytic Reduction) denitration catalyst. The method comprises the following steps: removing dusts from the surface of the waste titanium-based vanadium-series SCR denitration catalyst through high-pressure purging and ultrasonic wave treatment; carrying out acid treatment on the dust removed catalyst and washing the catalyst subjected to acid treatment with clean water; carrying out alkali treatment on the washed catalyst and washing the catalyst subjected to alkali treatment with clean water; adding the catalyst subjected to alkali treatment into a regeneration solution, soaking in a standing manner at 20-80 DEG C for 1-10h; drying the regenerated catalyst at low temperature; carrying out heat treatment on the dried catalyst in drying equipment at 200-500 DEG C for 1-3h, thereby obtaining a regenerated SCR denitration catalyst. The method has the beneficial effects of low treatment cost, simplicity in operation, easiness in automation and continuity, low corrosion to equipment, and good regenerating method and regenerating effect.
Owner:HUADIAN HIGH TECH GAOBEIDIAN ENVIRONMENTAL TECH +1

Tissue engineering cartilage and preparation method thereof

ActiveCN102526806AIncrease cell densityCell viability and microenvironment are goodBone implantTissue engineeringNormal cartilage
The invention discloses a tissue engineering cartilage and a preparation method thereof. The tissue engineering cartilage is cytoactive, consists of sequentially laminated cell patches including a surface layer, a middle layer, a deep layer and a calcified layer, and takes collagen matrix as a main component; the layers are compounded by collagen and hyaluronic acid, and the bordering integration of various layers of cartilage structures is promoted through hydrostatic culture; and the tissue engineering cartilage is prepared by preparing various layers of cartilage cell patches and assembling multiple structural layers. The prepared tissue engineering cartilage is in a layering arrangement of a natural cartilage, has a very good tissue structure and very good mechanical properties (frictional coefficient is 75-85 percent that of a natural cartilage tissue, and the elastic modulus is 80-90 percent that of the natural cartilage tissue.); the integration between different layers is good; experiments prove that the prepared tissue engineering cartilage can form the tidal line same as that of a normal cartilage tissue and has the same layering structure; and the prepared tissue engineering cartilage is capable of promoting regeneration and function recovery of a cartilage and obviously shortening the cycle of cartilage damage treatment and is applicable to cartilage defect restoration for a load-bearing part of a articular cartilage.
Owner:SHAANXI BIO REGENERATIVE MEDICINE CO LTD

Skeletal muscle regeneration using mesenchymal system cells

ActiveUS20130259843A1Enhancing functional recovery and structural regenerationRelieve painBone marrow stroma cellsBiocideMedicineMesenchymal stem cell
The present invention relates to a therapeutic substance and / or medicament and methods relating to the use of said substance and / or medicament for skeletal muscle regeneration using mesenchymal stem cells (MSCs) which can be applied directly or shortly after muscle damage or injury.
Owner:PLURI BIOTECH LTD

Regeneration method of casting wet type mixed old sand

The invention relates to a regeneration method of casting wet type mixed old sand. The regeneration method comprises the following steps: preprocessing casting wet type mixed old sand; wiping with water; drying; preheating; roasting; and post-processing. In the invention, components, such as bentonite, coal dust and ashes, in wet type old sand are effectively removed by a water wiping process, and a residual resin film in mixed old sand is thoroughly decomposed by a roasting process. The regeneration cost is low, and the regeneration effect is great. Actual production and verification show that the performance indexes of regenerated sand reach or surpass those of new sand. The regeneration method is successively applied to the core making production of cold boxes and has remarkable economical and social benefits.
Owner:WEICHAI POWER CO LTD

Preparation method and application of polymeric flocculant

The invention belongs to the technical field of polymeric flocculant synthesis, and concretely relates to a preparation and an application of a flocculant suitable for sewage treatment. The flocculant can be used for the sewage treatment field. The preparation of the flocculant is characterized in that a final product which is konjak grafted xanthate is obtained through an epichlorohydrin crosslinking-acrylamide grafting-xanthation three-step process carried out on konjak powder which is a raw material. The preparation method of the flocculant concretely comprises the following steps: adding the konjak powder and distilled water into a three-necked bottle having a stirring and condensing device to form a reaction system; adding epichlorohydrin to the reaction system, and continuously stirring; adjusting the temperature of the reaction system under the protection of nitrogen, and adding ceric ammonium nitrate to the reaction system; adding acrylamide; adding sodium hydroxide and carbon disulfide to make reaction products be saffron in color; and adjusting the pH of the obtained reaction product solution to 7, repeatedly washing with ethanol, carrying out vacuum dying of crude products, crushing, and sieving to obtain the polymeric flocculant. The first regeneration desorption rate of the polymeric flocculant can reach 96%, and the copper ion removal rate of the polymeric flocculant can reach above 80%.
Owner:HUAZHONG AGRI UNIV

Aliphatic polyester double-layered asymmetric guided tissue regeneration membrane and preparation method thereof

The invention discloses an aliphatic polyester double-layered asymmetric guided tissue regeneration membrane and a preparation method thereof. The aliphatic polyester double-layered asymmetric guided tissue regeneration membrane consists of a compact aliphatic polyester layer and a loose aliphatic polyester layer. The preparation method comprises the following steps: preparing an electrospinning liquid A and an electrospinning liquid B through aliphatic polyester; achieving electrostatic spinning film-forming through the electrospinning liquid A and obtaining the compact layer through hot-pressing; achieving electrostatic spinning film-forming on the electrospinning membrane A through the electrospinning liquid B to obtain the loose layer; achieving vacuum drying, solvent removal and freeze drying of a double-layered asymmetric electrospinning membrane; and finally achieving Co<60> radiation or ethylene epoxide sterilization of the double-layered asymmetric electrospinning membrane to obtain the double-layered asymmetric guided tissue regeneration membrane. The invention has the advantages that the preparation method is simple, the preparation efficiency is high, and the prepared membrane has favorable biocompatibility and mechanical property, appropriate degradation rate and excellent attachment property, can well satisfy the clinical requirements for guided tissue regeneration and repair, and is an ideal guided tissue regeneration membrane material.
Owner:北京市意华健科贸有限责任公司

Waste flue gas denitration catalyst regeneration method and equipment

The invention discloses a waste flue gas denitration catalyst regeneration method, and belongs to the field of air pollution control. The method comprises the following steps: (1) removing dust through vacuum adsorption; (2) spray-cleaning and cleaning using a high-pressure spray gun; (3) washing with deionized water after ultrasonic cleaning; (4) draining off after acid pickling; (5) soaking with an activation solution, wherein the activation solution is an aqueous solution of a precursor of V2O5-WO3 or V2O5-MoO3, the weight percentage of metal oxides in the V2O5-WO3 activation solution is as follows: 0.8-5.0% of V2O5, 0.3-1.0% WO3 and the balance of water, the weight percentage of metal oxides in the V2O5-MoO3 activation solution is as follows: 0.8-5.0% of V2O5, 0.15-1.0% of MoO3 and the balance of water; (6) drying and calcining. The invention also discloses waste flue gas denitration catalyst regeneration equipment which includes a tracked conveying device, a spray cleaning device, an ultrasonic cleaning tank, a deionized water cleaning device, a pickling tank, a drain basket, an activation tank, a rail transport device, a tunnel kiln and a tunnel calciner, which are sequentially arranged.
Owner:河南博苑新未来环保科技有限公司 +1

Adsorbent prepared by utilizing molecular sieve contained waste catalyst, and removal method for methanol by using adsorbent

The invention relates to an adsorbent prepared by utilizing a molecular sieve contained waste catalyst, and application method of the adsorbent in removal of methanol from olefin, and is mainly to solve the problems of difficult treatment of a conventional molecular sieve contained waste catalyst, environmental pollution due to discharging of solid wastes, etc. According to a technical scheme of the invention, a solid adsorbent prepared by ball rolling, sheet beating or extruded molding, and a preparation method thereof are adopted; the solid adsorbent is applied in removal of oxygen contained compounds like methanol from olefin raw materials; thus, good technical effects are obtained; wastes are reutilized, and the problem of wastes is well solved; and the solid adsorbent can be applied in adsorption and purification industrial production of removal of the oxygen contained compounds from various olefin raw materials.
Owner:CHINA PETROLEUM & CHEM CORP +1

Activated carbon regeneration method

The invention discloses an activated carbon regeneration method. Waste activated carbon and a desorption solution are mixed and pulped to obtain slurry, post treatment is conducted on the slurry to obtain regenerated activated carbon, and the desorption solution contains an organic solvent and water. The post treatment is performed in the mode (a) that the slurry performs catalyzed wet oxidation reaction, and the regenerated activated carbon and an oxidation filtrate serving as the desorption solution to be repeatedly used are obtained through filtration; or the mode (b) that the slurry performs desorption regeneration reaction, the regenerated activated carbon and a desorption filtrate are obtained through filtration, and then the desorption filtrate performs catalyzed wet oxidation reaction to obtain a reaction solution serving as the desorption solution to be repeatedly used. The catalyst adopted for the catalyzed wet oxidation reaction is one or more of copper salt, rhodium salt and palladium salt. The waste activated carbon is regenerated by means of the activated carbon regeneration method, the activated carbon regeneration rate is high, the losses of the activated carbon and the desorption solution are small, the reaction conditions in the regeneration process are moderate, and energy consumption is lower.
Owner:ZHEJIANG QICAI ECO TECH CO LTD

Preparation method of chitosan-grafted beta-cyclodextrin bonded silica gel absorbent

The invention discloses a chitosan-grafted beta-cyclodextrin bonded silica gel absorbent as well as a preparation method and application of the chitosan-grafted beta-cyclodextrin bonded silica gel absorbent, and belongs to the technical field of the absorbent material preparation. The preparation method of the chitosan-grafted beta-cyclodextrin bonded silica gel absorbent comprises the steps of (1) activating silica gel, (2) bonding the silica gel with gamma-aminopropyl, (3) carrying out silica gel formyl group modification reaction, and (4) bonding chitosan with glutaraldehyde and grafting beta-cyclodextrin with the chitosan. According to the chitosan-grafted beta-cyclodextrin bonded silica gel absorbent provided by the invention, the activated silica gel surface is chemically modified by gamma aminopropyl triethoxy silane, and then, cyclodextrin-grafted chitosan is taken as a functional monomer to compound a solid-phase extraction material. By combining cyclodextrin recognition performance and a chitosan absorbing function, the chitosan-grafted beta-cyclodextrin bonded silica gel absorbent has the advantages of firmness in bonding, stable property, favorable reproducibility and selection, and large enrichment multiple, and the chitosan-grafted beta-cyclodextrin bonded silica gel absorbent can be used in a wide pH scope. The absorbent can be used in the enrichment pretreatment of trace Cu (I) and Cd (II) in an environmental water sample.
Owner:FUZHOU UNIV

Compound cigarette filter tip

The invention relates to a compound cigarette filter tip which comprises a filter tip section close to the lip end, a filter tip section close to the tobacco shred end and wrapping paper. The filter tip section close to the lip end is provided with a fiber filtration layer, the filter tip section close to the tobacco shred end is provided with a metal sintered porous filtration layer, the metal sintered porous filtration layer is a micro-filtration element made from a metal powder sintered porous filtration material, the metal powder sintered porous filtration material is prepared by using metal particles as a raw material, one-time formation is achieved through a formation technology after pretreatment, and the metal powder sintered porous filtration material is formed after sintering. The filtration material is high in filtration precision, good in filtration effect, uniform in structure and good in reproducibility, so that the compound cigarette filter tip does not deform, has the very good filtration effect on nicotine, tar, nitrosamine and other non-gaseous-phase toxic and harmful substances, does not absorb beneficial aroma components in cigarettes, is high in melting point, does not cause overburning producing cancerogens, prevents scorch and toxic smoke (produced due to scorch of the filter tip), has a good cooling effect and makes cigarettes having a cool and refreshing taste.
Owner:普瑞特机械制造股份有限公司

Light hydrocarbon non-hydrogenation modified catalyst, preparing process and application thereof

A modified catalyst of C3-C11 petroleum spirit, comprising 0.1-5.0 mass% of mixed rare-earth oxide or antimony trioxide, 95.0-99.1 mass% of carrying agent, wherein the carrying agent comprises 50-80 mass% of HZSM-5 zeolite and 20-50 mass% of gamma-aluminum oxide. The catalyst fits for low octane rating gasoline modification for boosting the octane and lowering olefin content.
Owner:CHINA PETROLEUM & CHEM CORP +1

Aromatization method without hydrogen for light hydrocarbon

ActiveCN101314731ARegeneration operation flexibility increasedReduce energy consumptionCatalytic naphtha reformingOxygenMoving bed
A non-hydrogen aromatization method of light hydrocarbons comprises the following steps: (1) mixing naphtha with C3 to C5 light hydrocarbons, adding into a moving bed reaction zone, contacting with aromatization catalyst to carry out aromatization reaction, adding the spent catalyst flowing from the bottom of the moving bed reaction zone into a catalyst regenerator from the top through a spent catalyst elevator, a spent catalyst riser pipe, a spent catalyst separation hopper and a pressure transformation and flow control zone, passing through the buffer zone, a burning zone, a drying zone and a cooling zone in the catalyst regenerator sequentially from top to bottom, introducing oxygen-containing regeneration gas in the burning zone to burn and regenerate the spent catalyst, lifting the regenerated catalyst, and adding into the moving bed reactor from the top. The method can transform low-octane naphtha and low-carbon hydrocarbons into high-octane petrol and high-quality liquefied gas, and has the advantages of large generation operation flexibility, low energy consumption, good catalyst regeneration effect and long service life.
Owner:CHINA PETROLEUM & CHEM CORP +1
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