206results about How to "Improve adsorption stability" patented technology

The present invention relates to adsorbent for ammonia refrigeration, is especially one kind of attapulgite clay base composite adsorbent for ammonia refrigeration and its preparation and application, and belongs to the field of new chemical functional material preparing technology. The composite adsorbent for ammonia refrigeration is prepared through mixing alkali earth chloride, attapulgite clay, pore expanding agent and adhesive in certain proportion, forming in a pelletizing machine, stoving and roasting. The composite adsorbent has the advantages of stable performance, high adsorption stability, etc.

The invention relates to a multifunctional bio-charcoal and a preparation method thereof. According to the technical scheme, the preparation method comprises the steps of dipping biomass into 1-15wt% caustic alkali solution for 1-50h, washing with water to be neutral, and drying to obtain treated biomass; then charring the treated biomass in a tube furnace in mixed gas at 300-900 DEG for 1-130h to obtain the multifunctional bio-charcoal. The biomass is one of rice straw, wheat straw, sawdust, wood, green grass, fruit peel and animal tissue waste; the biomass contains 30-60wt% of volatile organic carbon of charcoal, 10-40wt% of fixed carbon, 1-30wt% of ash and 10-60wt% of water. The preparation method disclosed by the invention has the characteristics of low production cost, high yield, simple process, controllable production process and environment friendliness, and the prepared multifunctional bio-charcoal has a good adsorption effect on heavy metals and high stability and can be used for repairing water bodies, solid matrixes and soil which are polluted by heavy metals.

The invention relates to a preparation method of a hydrophilic PTFE (polytetrafluoroethylene) composite microporous membrane. The preparation method comprises the following steps: 1, adding inorganic nano particles in the formula of a PTFE raw material, uniformly mixing and stretching to obtain a PTFE composite microporous membrane; 2, adding a polyhydroxy compound and a couping agent to water to prepare a modified water solution, soaking the PTFE composite microporous membrane obtained in the step 1 until the membrane is transparent, then dipping into the modified water solution, taking out and drying; and 3, dipping the dried PTFE composite microporous membrane in a pentanedial solution, and after taking out, washing and drying to obtain the hydrophilic PTFE composite microporous membrane. The preparation method has the advantages that after the PTFE composite microporous membrane is treated by the modifying method, the hydrophilic property of the membrane is remarkably improved; persistence of the hydrophilic property is obviously improved while the hydrophilic property is ensured; the preparation process is easy and feasible, is low in cost and is suitable for industrial production.

The invention provides lipophilic polyurethane sponge and a preparation method thereof. The lipophilic polyurethane sponge is based on porous polyurethane sponge as a matrix, and the matrix is grafted with a hydrophilic oleophobic C-C long chain group. As a way for implementation, by reaction of the polyurethane sponge and a C-C long chain-containing acyl chloride compound, so that the polyurethane sponge can be grafted with a C-C long chain by bonding of chemical bonds of amino, hydroxyl and-C (O) Cl functional groups in polyurethane. Experiments confirm that the structure can greatly reduce the surface energy of the polyurethane sponge, greatly improves the oil absorption capacity, and is low in price, non-toxic and non-pollution, so that the lipophilic polyurethane sponge is a good oil adsorption material, and can be used to quickly and efficiently adsorb and recover crude oil and other substances in crude oil leakage and other situations.

The invention discloses a method for preparing mycotoxin adsorbent for an efficient carbon silicon feed by taking rice hulls as raw materials. The method comprises the following steps of: removing impurities from the rice hulls; pre-carbonizing the rice hulls; dissolving the pre-carbonized rice hulls in alkali liquor to remove silicon; activating and sintering the rice hulls and the like. According to the method, a porous carbon silicon composite material with different specific surface areas and total pore volumes is prepared from the rice hulls, which are abundant in source, low in cost and reproducible, serving as the raw materials, under the process conditions of the control of pre-carbonization, silicon removal by alkali dissolution, high-temperature active sintering and the like, so that the requirements of each industry on adsorbing materials are met. The mycotoxin adsorbent has obvious effects on the adsorption and reservation of aflatoxin B1, an adsorption rate is up to about 99 percent, and the adsorption stability is obvious, so the method has a bright prospect in the field of the processing of grain feeds.

The invention discloses a paper tape adsorbing and delivering device which comprises an outer rotary drum (2), an inner rotary drum (1), a vacuum air extractor (7), a power output device and a fixing device, wherein the outer rotary drum (2) and the inner rotary drum (1) are hollow, the outer rotary drum (2) is sheathed outside the inner rotary drum (1), and the outer rotary drum (2) and the inner rotary drum (1) can rotate relatively; one open end of the inner rotary drum (1) is connected with the vacuum air extractor (7), and the side face of the inner rotary drum (1) is provided with a long stripe-shaped gap along the axial direction; a plurality of vacuum adsorbing holes (4) are formed in the surface of the outer rotary drum (2), so that the vacuum adsorbing holes (4) can generate negative pressure when rotating to the gap position of the inner rotary drum (1); and the outer rotary drum (2) is fixedly arranged on main equipment by the fixing device, and can rotate relative to the fixing device. The paper tape adsorbing and delivering device provided by the invention is simple in structure, small in space occupation, convenient to process, wide in application range, and good in adsorption stability.

The invention discloses modified bio-char as well as a preparation method and an application thereof. The modified bio-char is obtained by impregnating acid modified bio-char with a micellar system, wherein the micellar system comprises an anionic biosurfactant, a cationic chemical surfactant and a humic acid solution. The preparation method comprises the following steps: (1) preparing bio-char; (2) preparing the acid modified bio-char; (3) preparing the micelle modified bio-char. The modified bio-char has the advantages of high adsorption capacity, high adsorption stability, good dispersibility in water and the like; the modified bio-char and a ferric salt flocculant are combined to be applied to removal of phenol from industrial wastewater, can realize integration of adsorption and flocculation, improve the flocculation effect of a water treatment agent, shorten time of a treatment process and reduce waste residues.

The invention belongs to the technical field of aluminum alloy machining equipment, and discloses an aluminum alloy metal part grinding and polishing device which comprises a grinding table and an aluminum alloy plate. Two symmetrically-distributed fixing assemblies are arranged at the top of the grinding table. Each fixing assembly comprises a first hydraulic rod, wherein the mounting end of the first hydraulic rod is arranged at the top of the grinding table, a fixing plate is arranged at the output end of the first hydraulic rod, a first electric telescopic rod is arranged on one side of the fixing plate, a first moving plate is arranged at the output end of the first electric telescopic rod, second electric telescopic rods are arranged on the end face of the periphery of the first moving plate, second moving plates are arranged at the other ends of the second electric telescopic rods, first air guide pipes are arranged at one ends of the second moving plates, and suckers are arranged at the other ends of the first air guide pipes. According to the aluminum alloy plate polishing device, through the arrangement of a polishing assembly, the fixing assemblies and a containing plate, the two side faces of an aluminum alloy plate can be ground at a time, the aluminum alloy plate can be ground and pre-cleaned, and the grinding precision is controlled.

The invention belongs to the fields of material science and engineering and biological separation engineering, and particularly relates to a quantum dot-based protein imprinted polymer microsphere as well as preparation and application thereof. The CdTe quantum dot is directly used as a functional monomer through taking mercaptoacetic acid (TGA) and glutathione (GSH) together as a stabilizer, protein is a template molecule, dopamine is a cross-linking agent, and the imprinted polymer microsphere is obtained through the auto polymerization of the dopamine. The quantum dot-based protein imprinted polymer microsphere as well as the preparation and the application thereof provided by the invention have the advantages that fluorescence signals of the quantum dots are utilized for detection, and the functionalized quantum dots are directly taken as functional monomers, so that the quantum dots are contained in imprinted holes. Therefore, the detection sensitivity can be improved. Meanwhile, an imprinted polymer layer is obtained through the auto polymerization of the dopamine, and the imprinting process is further simplified. The quantum dot-based protein imprinted polymer microsphere is used for analysis and detection on phycocyanin in a sea water and lake water sample and bovine hemoglobin in a bovine urine sample, the adding standard recovery rate can reach 90 percent or higher, and the reuse performance is good.

The invention discloses a preparation method of an organic / inorganic composite intermediate / high-temperature proton conductive membrane. The preparation method comprises the following steps of: (1) mixing perfluorinated sulfonic acid resin, a mesoporous silica particle, and a solvent at a mass ratio of 100:(5-70):(100-2000) to obtain a suspension; (2) casting the suspension on a smooth and flat substrate to obtain a membrane by curing; (3) soaking the membrane in an ionic liquid to cause the membrane to adsorb the ionic liquid, wherein the mass of the ionic liquid adsorbed into the membrane is 10-80% of that of the perfluorinated sulfonic acid resin; and (4) removing the ionic liquid on the surface of the membrane adsorbed with the ionic liquid to obtain the organic / inorganic composite intermediate / high-temperature proton conductive membrane. The organic / inorganic composite intermediate / high-temperature proton conductive membrane prepared by the method disclosed by the invention has the advantages of high mechanical strength and good intermediate / high-temperature proton conductivity, the intermediate / high-temperature proton conductivity is more than 10<-3>S / cm, the tensile strength is higher than 6.0MPam and the preparation method facilitates wide application of the intermediate / high-temperature proton conductive membrane to the fields of fuel cell, catalysis, sensors and the like.

The invention discloses a phase-change composite material with a photo-thermal conversion function and a preparation method thereof, and belongs to the cross field of phase-change energy storage and energy conversion. The multifunctional phase change composite material is prepared by combining Ti2O3 nano particles with a heat storage phase change material for the first time, so that a photo-thermal conversion function is expected to be provided on the basis of phase-change heat storage and temperature control functions, and the carbon foam-based phase-change composite material which is is easy to cut and process, has a controllable appearance size, has light weight and flexibility, and has photo-thermal conversion performance is provided. Due to the three-dimensional porous carbon foam matrix of the phase change composite material, the phase-change material can be stably stored, and the storage capacity can be regulated and controlled. The phase-change composite material has excellent photo-thermal conversion and temperature adjusting functions and can be used in the aspects of heat energy storage and release, thermal insulation, photo-thermal conversion, infrared stealth and infrared decoy of military equipment, and the like.

The invention discloses a pressed adsorption router, belonging to routers in the technical field of electronic products. The pressed adsorption router can be adsorbed at the wall corner, so that the router is less likely to fall down by touch and is more stable in adsorption. The router comprises a router body with a fan-shaped cross section. The router body comprises an upper fan surface, a lower fan surface, two rectangular side surfaces and a cylindrical surface. Two rectangular side surfaces are vertical to each other. A plurality of RJ45 interfaces are uniformly distributed on the cylindrical surface. An adsorption device is installed on the rectangular side surface. Main suckers are correspondingly arranged at four corners of the adsorption device. Mouths of the main suckers are outward. An annular sucker with a hemispheroid cross section is arranged outside the main sucker. The main sucker and the annular sucker are integrated. The pressed adsorption router is applicable to the router.

The invention provides an adsorbent composition for removing heavy metal ions in industrial wastewater. The adsorbent composition comprises the following raw material components: 23-28 parts of nano-iron oxide, 37-42 parts of lipase liquid, 8-12 parts of sodium humate, 10-12 parts of medical stone powder, 11-13 parts of sodium carboxymethyl starch, 10-12 parts of aluminium polychloride, 5-8 partsof chitosan, 5-8 parts of sepiolite powder and 5-8 parts of zeolite powder. According to the adsorbent composition disclosed by the invention, the various raw material components for preparing the adsorbent composition are free from toxicity and harmless, and secondary pollution after adsorption treatment is avoided. Moreover, the various raw material components have excellent adsorption effects,the various raw material components can be mutually promoted and matched with one another in the mixed preparation process of the adsorbent composition, synergistic effects are achieved, and finally the prepared adsorbent composition is capable of well adsorbing the heavy metal ions in the industrial wastewater, and is excellent in adsorption effect, high in adsorption efficiency, low in cost andstable in adsorption.

A photoelectric conversion element, having a photoconductor layercontaining semiconductor fine particles carrying a metal complex dye of Formula (I); a metal complex dye, a dye solution, a dye-adsorbed electrode, a dye-sensitized solar cell, and a method for producing the solar cell:M(LA)(LD)(LX)mX·(CI)mY  Formula (I)M represents a metal ion, LA represents a ligand of Formula (AL), LD represents a bidentate or tridentate ligand, at least one of coordinating atoms being an anion; LX represents a monodentate ligand; CI represents a counter ion; mX is 0 or 1; mY is 0 to 3;Rings A to C represent a heterocycle; Z1 and Z2 represent a carbon or nitrogen atom; Anc1 to Anc3 represent an acidic group; X1 to X3 represent a single bond or linking group; R1 to R3 represent a substituent; l1, l3, l2, m1, m3, m2, n1, n2, and n3 each are an integer.

The invention provides a preparation method and a use of a phosphate anion surface imprinted polymer. The preparation method comprises the following steps: 1, preparing La (III) modified graphene oxide (GO-La); 2, preparing a vinylation modification material of La (III) modified graphene; and 3, preparing the phosphate anion surface imprinted polymer (GO-La-IIP). The phosphate anion surface imprinted polymer (GO-La-IIP) adopting the La (III) modified graphene oxide (GO) has superior adsorption performance. The polymer based on the electrostatic action force between lanthanum and phosphate anions has good adsorption stability. The GO-La-IIP has good selectivity and regeneration effect on the phosphate anions. The polymer provides a new technical way for selective separation and enrichment of the phosphate anions in an environment sample.

The invention belongs to the technical field of wastewater treatment and soil remediation, and particularly relates to a sulfur-based intercalated hydrotalcite modified charcoal-based adsorption material and preparation and application thereof. The preparation method comprises the following steps: dipping a biomass raw material in an alkali liquor, carrying out pyrolysis carbonization to obtain an activated biochar material, carrying out hydrotalcite loading under a hydrothermal condition by taking the biochar material as a substrate, and finally replacing interlayer anions of hydrotalcite with sulfenyl anions. The adsorbent obtained by the preparation method not only has the adsorption capacity of independent biochar and hydrotalcite on heavy metals, but also can obtain a loose and porous biochar material by activating a biomass material, and then the biochar material can be further expanded through a hydrothermal reaction, and the loading capacity and the loading stability of the hydrotalcite are improved; finally, the adsorption capacity of the heavy metal anions is remarkably improved through interlayer replacement of the sulfenyl anions.

The invention provides an ecological restoration method for a black and odorous riverway. The method comprises the following steps: (1) rapidly and fully stirring bottom mud, putting a mineral bottommud ecological restoration material into a water body and stirring the bottom mud at the same time for uniformly dispersing the material in the bottom mud, standing the mixture for 1-3 days, then adding bacterial sludge powder into the water body and stirring the water body, thus completing bottom mud restoration after 3-5 days of microbial degradation; (2) using an aeration oxygenation method forincreasing dissolved oxygen in the water body, and then arranging carbon fiber ecological grass in the water body; and (3) planting aquatic plants in the water body to absorb organic matters and heavy metal pollution in the water body, putting benthic organisms into the water body to construct a benthic ecosystem, and finally putting fishes into the water body to control the growth of algae in the water body. According to the method, the inorganic mineral material and the bacterial sludge powder are adopted for ecological restoration of the bottom mud, then the water body habitat and the water body ecological system are sequentially constructed, comprehensive restoration of the bottom layer, the water body and the environment of the riverway is completed, treatment is thorough, and the treatment efficiency is high.

The invention relates to a composite material and a preparation method thereof. The preparation method comprises the steps of slowly adding the following components in parts by weight: 80-90 parts of amination-enhanced modified straw, 1-10 parts of oxidized graphene and 1-10 parts of cyclodextrin into deionized water with the bath ratio of 1 to (10-20), and carrying out ultrasonic treatment for 1-24h; and then, carrying out freeze drying to obtain the amination-enhanced modified straw / oxidized graphene / cyclodextrin composite material. According to the invention, the amination-enhanced modified straw / oxidized graphene / cyclodextrin composite material is prepared by loading oxidized graphene and cyclodextrin on the amination-enhanced modified straw serving as a carrier, and then, carrying out freeze drying. The composite material has the advantages of environmental friendliness, good mechanical property, regular structure, high porosity and adsorption capacity, high adsorption speed, wide application range, simplicity in desorption, reutilization and the like.

The invention relates to a treatment method of sulfur dioxide-containing flue gas, which comprises the following steps: compressing and condensing the sulfur dioxide-containing flue gas in a compressing and condensing unit, feeding into a condensing and liquefying unit, feeding non-condensable gas into an adsorption unit for adsorption, and discharging purified gas after reaching the standard, wherein an adsorption material adopted by the adsorption unit is a modified MIL-(Al) metal organic framework material, desorption is performed after adsorption penetration, and desorbed gas and to-be-treated flue gas are mixed and enter the compressing and condensing unit. According to the invention, efficient physical adsorption and recovery of SO2 can be realized, the liquefaction energy consumption is relatively low, the SO2 recovery rate is high, the operation stability is good, and the purified gas meets the emission requirements.

The invention belongs to the field of material science and engineering and environmental science, and particularly relates to a method for preparation of a lead ion imprinted polymer microspheres by use of bi-functional monomer synergistic effect. A lead ion is used as an imprinting ion (a template ion) of a polymer, methyl acrylic acid and 4-vinyl pyridine are used as functional monomers, and imprinted microspheres with uniform particle size can be prepared by suspension polymerization. The prepared imprinted microspheres have high lead ion adsorption capacity, good dynamic characteristics, high recognition selectivity and high repetition utilization. The microspheres achieve high selective enrichment of lead ions in natural water samples by combination of solid phase extraction. The method breaks through the traditional use of single functional monomers, and a new method for the preparation of an imprinted polymer by use of bi-functional monomers or multi-functional monomers is provided, and the method has the advantages of simple and rapid operation, low cost and good reproducibility, and has wide application prospect.

The invention discloses a preparation method and application of an environment-friendly, efficient and low-cost polyamino-carboxyl crosslinked straw fiber adsorbent material, and relates to the fieldsof preparation and application of biomass adsorbent materials. The polyamino-carboxyl crosslinked straw fiber adsorbent material is obtained through multiple times of cross-linking of diethylenetriamine, epichlorohydrin and nitrilotriacetic acid. It is shown through FTIR spectrograms that amino groups and carboxyl groups are introduced successfully, and the adsorbent material has good adsorptionperformance for a single system or mixed system of Cd and SMZ.

The invention provides a preparation method of a high carboxyl density polycarboxylic acid water reducing agent with long and short branched chains. The preparation method comprises the following steps: (1) adding 3000 molecular weight polyether macromonomers, 1200 molecular weight polyether macromonomers and water at a certain ratio in a reaction kettle, and stirring and heating until dissolving;2) controlling the temperature to 45-50 DEG C, and starting to add a certain amount of hydrogen peroxide; (3) after 5 min, sequentially starting to dropwise add a solution B and a solution A, whereinthe solution A starts to be dropwise added within 10 min after the addition of the hydrogen peroxide, the dropwise adding time of the solution A is a hours, the dropwise adding time of the solution Bis a+0.5 hours, the solution A consists of acrylic acid, unsaturated sulfonate and water at a certain ratio, and the solution B consists of ascorbic acid, a phosphate monomer, a chain transfer agentand water; and (4) after the dropwise adding is completed, maintaining temperature constant, curing for b hours, and when the temperature of the reaction solution is lower than 30 DEG C, slowly addinga certain amount of neutralizer, and supplementing water to 1000 parts, thereby obtaining the high carboxyl density polycarboxylic acid water reducing agent with long and short branched chains.

Belonging to the technical field of oilfield exploitation and drilling treatment agents, the invention discloses a high temperature resistant filtrate loss reducer for drilling fluid and a preparationmethod thereof. The high temperature resistant filtrate loss reducer comprises: 30-60 parts of humic acid resin, 10-50 parts of acrylamide, 10-40 parts of acrylic acid, 10-30 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10-20 parts of maleic anhydride, 5-20 parts of N-vinyl pyrrolidone and 5-10 parts of a nano-material. The filtrate loss reducer disclosed by the invention is formed by graft copolymerization of corrosive acid resin and other monomers, and contains the nano-material, can effectively improve the temperature resistance and salt resistance of the filtrate loss reducer, andensures good performance under the conditions of a high temperature of 220DEG C and high salt.

The invention discloses a quantitative rapid deoxynivalenol detection card which comprises a sample pad, a nitrocellulose membrane and an absorbent pad arranged on a bottom plate in sequence, whereina detection line coated with a DON hapten-carrier protein coupling agent and a quality control line coated with a goat anti-rat antibody are arranged on the nitrocellulose membrane; a to-be-detected sample solution is mixed and incubated with latex microspheres coupled with a DON antibody before dropping to the sample pad. The detection method comprises the steps: preheating, adding liquid, incubating, reacting and reading the result. The detection card disclosed by the invention does not need a release pad containing a gold-labelled antibody and is used for detecting the latex microspheres coupled with the DON antibody mixed with the sample solution, the color is bright and easy to determine, and the coupling antibody is in a chemical bond coupling state, has excellent physical adsorptionstability with colloidal gold and is high in detection accuracy and precision degree; the batch-to-batch difference is small, and the cost is low; in addition, the detection method of the detection card disclosed by the invention is simple in operation and suitable for batch production and application.

The invention discloses an air suction device for suction nozzles. The air suction device comprises long-bar-shaped magnetic conductive plates, air intake connectors, suction nozzle seats and the nozzles, wherein the air intake connectors and the suction nozzle seats are installed on the two sides of the plate faces of the magnetic conductive plates correspondingly, and the suction nozzles are installed on the suction nozzle seats. Each suction nozzle seat comprises a sliding seat connected to the corresponding magnetic conductive plate, and a fixed seat fixed to the sliding seat. An air outlet hole communicating with the corresponding suction nozzle is formed in each fixed seat. The sliding seats can slide left and right on the magnetic conductive plates, and after ventilation grooves where bolts penetrate are opened, the ventilation grooves are pressed by the protruding outer side walls of the sliding seats and suction nozzle sealing rings to recover to the sealed state. An external air source is connected in each suction nozzle through the corresponding air intake connector, the corresponding opening-section ventilation groove, a sealed concave cavity, a penetrating and inserting opening and the corresponding air outlet hole. The air suction device has the beneficial effects that the adsorption stability is high, the appearance is attractive, no air pipe is not externally arranged, and the sealing performance is good.

This invention discloses a method for preparing polyurethane and its application. The method comprises: (1) heating polyisocyanate trimer, solvent (70-90% of the total amount), and catalyst to 70-80 deg.C under nitrogen protection, and stirring; (2) adding monofunctional end-capping agent and solvent (5-15% of the total amount), and reacting at 78-82 deg.C; (3) adding polyether diol monomer and solvent (10-20% of the total amount), and reacting at 78-82 deg.C; (4) adding N-heterocyclic compound end-capping agent and the rest solvent, and reacting at 78-82 deg.C. The obtained polyurethane can be used as paint dispersant, and has strong adsorbency to fused ring organic paints, and high acidic tolerance.

The invention provides a high-temperature industrial wastewater treatment agent. Raw materials of the treatment agent include, by weight, 20-25 parts of activated carbon, 10-12 parts of nanometer ferroferric oxide, 45-50 parts of a lipase solution, 5-8 parts of sepiolite powder, 5-8 parts of zeolite powder, 5-8 parts of maifanite powder, 5-8 parts of vermiculite, 5-8 parts of perlite, 10-12 partsof chitosan, 3-5 parts of sodium humate, 10-12 parts of sodium carboxymethyl starch, 8-10 parts of polyaluminum chloride and 0.5-0.7 part of tea polyphenol. The raw material components used for preparing the high-temperature industrial wastewater treatment agent are nontoxic and harmless, and do not cause secondary pollution after adsorption treatment, and are matched with a specific preparation method to realize the good mutual promotion and cooperation of all the raw material components, so the treatment agent synergistically performs an excellent water purification effect, and can well remove heavy metal ions and harmful organic substances from high-temperature industrial wastewater.

The invention provides a lead frame feeding and conveying device, which comprises a material storage mechanism, an overturning suction disc and a conveying mechanism, wherein the material storage mechanism is provided with a lifting plate which moves in the vertical direction and is used for storing a lead frame, the overturning suction disc is rotationally arranged, the front section of the overturning suction disc is a pair of suction plates which are arranged in parallel at intervals, a plurality of vent holes are formed in one face of each suction plate, the conveying mechanism comprises a pair of rails arranged at intervals, the rails are of an L-shaped structure, a pushing plate is movably arranged in the middle of the rails in the length direction, a plurality of shifting sheets are arranged on the top face of the pushing plate at intervals in the length direction, the interval size is larger than the length of the lead frame, the shifting sheet can protrude out of or be hidden in the pushing plate, gaps are formed between the pushing plate and the rails on the two sides, and when the overturning suction disc is turned to the conveying mechanism, the two suction plates are located in the gaps between the pushing plate and the rails on the two sides correspondingly. According to the invention, high adsorption firmness is achieved, the lead frame can be prevented from falling off in the feeding process, and the lead frame can be conveyed more stably and accurately.

The invention relates to a treatment method of sulfur dioxide-containing waste gas; the sulfur dioxide-containing waste gas is compressed in a compression unit and enters an adsorption unit for adsorption; an adsorption material adopted by the adsorption unit is a modified MIL-(Al) metal organic framework material, desorption is performed after adsorption penetration, desorbed gas is compressed and condensed in the liquefaction unit, and non-condensable gas and compressed flue gas are mixed and then enter the adsorption tower. According to the invention, efficient physical adsorption and liquefaction recovery of sulfur dioxide can be realized, frequent operation is not needed, the SO2 recovery rate is high, the operation stability is good, and the purified gas meets the emission requirements.

A strong-antibacterial multi-functional agricultural chemical used also as fertilizer is prepared from deacetylated chitin and its derivative, ClO2, and vegetative nutrients through preparing the solution of deacetylated chitin or its derivative, slowly adding ClO2 while stirring, reaction, adding vegetative nutrients and stirring.