126 results about "Adsorption method" patented technology

The application provides a preparation method of a zeolite adsorbent, comprising the following steps: a) treating a zeolite in an oxalic acid solution, and drying to obtain a zeolite precursor; b) treating the zeolite precursor obtained in the step a) in an ammonium fluoride solution, and drying to obtain a zeolite adsorbent. The application also provides a zeolite adsorbent and an ammonia adsorption method. The preparation method provided by the application is mild and controllable in structure adjustment, and the zeolite is post-treated to make the zeolite framework selectively rearrange or slightly adjust in local areas, so that mesoporous channels with appropriate sizes and good connectivity are generated. The preparation method provided by the application can introduce mesopores while maintaining the integrity of the microporous framework structure as much as possible, avoids damage to the micropores or collapse of the framework, and has the characteristics of simple process route, wide range of control parameters, good repeatability and suitability for large-scale preparation.

The invention discloses a nitrate-containing waste liquid treatment method, which comprises: (1) waste acid treatment: diluting waste acid in a neutralization reaction kettle, adding ammonia water while stirring, controlling the temperature to be 70-95 DEG C, continuously adding ammonia water to adjust the pH value of the solution to be 7.5-10.0 after the neutralization is completed, and carrying out stirring distillation to obtain an ammonium sulfate nitrate aqueous solution or an ammonium sulfate nitrate crystal; (2) wastewater treatment: 1) wastewater steam stripping: transferring nitrate wastewater into a steam stripping kettle, adding a pH regulator to regulate the pH value to be 10-13, heating the steam stripping kettle to a boiling state by using steam, distilling, condensing and recovering nitrate in the wastewater; and 2) oxidation treatment: after steam stripping is finished, hydrogen peroxide is added into the steam stripping kettle in a boiling state, stirring reaction is performed, and the reacted wastewater can be discharged after reaching the standard. Compared with a traditional Fenton method and an activated carbon adsorption method, the method has the advantages that secondary pollutants Fe (OH) 3 generated by treatment and saturated activated carbon after adsorption can be avoided, harsh reaction conditions such as light, electricity and microwaves can be avoided, the operation cost is reduced, the method is safe, environment-friendly and free of secondary pollution, the nitrate removal rate can reach 100%, and the method is suitable for industrial production. The COD (Chemical Oxygen Demand) of the treated wastewater is less than 100mg / L, and the wastewater can reach the direct discharge standard.

The application belongs to the technical field of solid waste resource utilization, and specifically discloses a method and device for preparing silicon-calcium aggregate, sulfuric acid and CO2 by phosphogypsum oxygen-rich high-temperature decomposition. The method uses the adsorption method to obtain pure nitrogen products and oxygen-rich combustion-supporting gas, and provides different reaction temperatures and reaction atmospheres for different reaction stages of the rotary kiln reactor through the multi-point combustion mode, thereby ensuring the controllable high-temperature environment and atmosphere in the kiln. The method improves the combustion efficiency, greatly reduces the amount of flue gas after decomposition, effectively improves the concentration of SO2 in the flue gas and the efficiency of the subsequent sulfuric acid preparation system, and realizes CO2 emission reduction and resource utilization by using the CO2-rich tail gas of the sulfuric acid preparation system for adsorption recovery. The application also provides a device for realizing the method, which combines gas adsorption, oxygen-rich combustion and rotary kiln multi-point combustion equipment, thereby ensuring the effective realization of the process.

The application provides a preparation method of a two-dimensional layered silicate mineral film treated by a reducing modifier, which comprises the following steps: firstly, organic modification of a two-dimensional layered silicate mineral by a reducing ionic liquid; then, loading of the reducing modifier into the interlayer of the two-dimensional layered silicate mineral; and finally, construction of a two-dimensional channel by vacuum filtration to prepare a film with a thickness of 5-20 microns. The two-dimensional layered silicate mineral film obtained by the method has a large surface area and can effectively treat heavy metal Cr(VI). The construction of the two-dimensional channel provides a limited space for the reducing modifier to prevent oxidation and provides abundant sites for the oxidation-reduction reaction in the nanopore channel, and solves the problems of desorption difficulty and secondary pollution caused by the traditional adsorption method for treating heavy metals.

The invention discloses an adsorption device and a workpiece adsorption method, and relates to the technical field of workpiece adsorption. The adsorption device comprises: an adsorption member; a plurality of gas path channels; m negative pressure generating units; the air path switching module can be used for selectively communicating any air path channel with the air suction port of the corresponding negative pressure generation unit or communicating with the atmosphere or communicating with the closed pipeline; the limit negative pressure absolute value of the Nth negative pressure generating unit is smaller than that of the (N + 1) th negative pressure generating unit; when the air suction port of the Pth negative pressure generation unit is communicated with the air channel, the air channel corresponding to the (P-1) th negative pressure generation unit is communicated with the closed pipeline; and when the air channel corresponding to the (P-1) th negative pressure generation unit is communicated with the closed pipeline, the (P-1) th negative pressure generation unit stops working. The adsorption device is used for avoiding the heat accumulation phenomenon of the negative pressure generation unit on the premise that the adsorption pressure is guaranteed, the service life of the negative pressure generation unit is prolonged, and meanwhile the applicability of the adsorption device is improved.

The invention discloses an adsorption device, an adsorption method and a maintenance method of the adsorption device, and relates to the technical field of adsorption, the adsorption device comprises an adsorption execution unit, an adsorption control unit and an adsorption management and control unit, and the adsorption execution unit comprises an adsorption part and a pressure detection part which are connected; the adsorption control unit comprises an industrial control part, a control part, a data acquisition module and a negative pressure adjusting module which are connected with one another; the adsorption management and control unit is connected with the industrial control and comprises a process parameter library of the workpiece; when the adsorption part adsorbs a workpiece, the pressure detection part detects adsorption pressure data of the adsorption part, the data acquisition module acquires the adsorption pressure data of the adsorption part and transmits the adsorption pressure data to the control part, and the industrial control part calls process parameters and transmits the process parameters to the control part; the control piece controls the negative pressure adjusting module to adjust the adsorption pressure of the adsorption piece according to the adsorption pressure data of the adsorption piece and the process parameters of the workpiece; therefore, the situation that the workpieces are difficult to release due to too large adsorption pressure and are traced or damaged is avoided, and the workpieces are prevented from falling off and being damaged due to too small adsorption pressure.

The utility model discloses a special equipment installation tool, and belongs to the technical field of special installation tools. A special equipment installation tool comprises an installation box and further comprises a first installation block fixedly installed on the installation box, an installation rod is installed on the first installation block in a sliding mode, a groove hole is formed in the end of the installation rod, and a suction cup is fixedly connected to the installation rod; the negative pressure assembly is arranged in the mounting box, and the air suction end of the negative pressure assembly is communicated with the slotted hole through a connecting assembly; the trepanning assembly is arranged on the mounting box; suction force generated by the negative pressure assembly is utilized, the drill bit is tightly adsorbed on the smooth metal surface of the special equipment through the suction cup, the adsorption mode is firm and reliable, deviation of the drill bit in the punching process can be effectively limited, it is guaranteed that the drill bit is perpendicular to the surface of the equipment, and meanwhile the drilling efficiency is improved. And due to negative pressure adsorption, the sliding problem caused by the smooth surface of the equipment is also reduced, so that high-precision and stable drilling operation is realized.

Provided are: particles of a recycled polycarbonate resin which are characterized by having an oligomer content of 1.4% or less and a molecular weight distribution (Mw / Mn) of 2.3 or less, both determined by gel permeation chromatography (GPC); or particles of a recycled polycarbonate resin which are characterized by having an oligomer content of 0.8% or less and a molecular weight distribution (Mw / Mn) of 2.3 or less, both determined by gel permeation chromatography (GPC), and having a specific surface area of 0.05-1.2 g / cm3 as determined by a gas adsorption method. The particles of a recycled polycarbonate resin have a feature of having excellent impact resistance, heat resistance (hue after molding), and transparency.

This invention belongs to the technical field of gas purification equipment, specifically relating to a molecular sieve adsorption tower for CO2 adsorption. The tower includes a tower body, within which, from the inside out, are arranged a central air channel, a molecular sieve layer, an alumina layer, and an outer air channel. A pressing mechanism is provided at the top of the tower body for pressing the molecular sieve layer and the alumina layer respectively. The pressing mechanism includes a drive plate that can move up and down along the top of the tower body. Below the drive plate is an inner pressing structure for pressing the molecular sieve layer, and outside the inner pressing structure is an outer pressing structure for pressing the alumina layer. As the drive plate descends, the inner and outer pressing structures simultaneously press the molecular sieve layer and the alumina layer respectively. This invention provides a molecular sieve adsorption tower for CO2 adsorption capable of separately pressing the sedimentation of the alumina layer and the molecular sieve layer.

The utility model provides a biomass synthesis gas separation device, which relates to the technical field of synthesis gas separation, and comprises a refrigeration module, a separation module and a gas supply module, the separation module comprises a separation tank, a separation outlet arranged on the separation tank, and a heat exchange coil and a streaming structure arranged in the separation tank, due to the arrangement of the streaming structure, a zigzag channel is formed in the separation tank; the gas supply module comprises an inflow pipe, one end of the zigzag channel is connected with the inflow pipe, the other end of the zigzag channel is connected with the separation outlet, and the heat exchange coil and the zigzag channel are arranged in a penetrating mode. Separation of biomass synthesis gas is achieved through different liquefaction temperatures of all gas components, the separation effect is more sufficient compared with a membrane separation method and an adsorption method, carbon monoxide, carbon dioxide and hydrogen obtained after separation are independently stored, convenient conditions are provided for subsequent chemical reaction synthesis of alcohol substances, and the reaction efficiency of the alcohol substances is also improved.

The invention discloses a method for determining activity of host cell proteolytic enzyme of hydrolyzed polysorbate, and belongs to the technical field of biological detection. The method comprises the following steps: adding a solid-phase reaction substrate (containing a polysorbate analogue) and a to-be-detected sample into a buffer solution to react, removing the solid-phase reaction substrate by utilizing a magnetic adsorption method after the reaction is finished, and carrying out fluorescent quantitative PCR amplification reaction on the residual reaction solution to determine the content of free DNA in the reaction solution. Host cell proteolytic enzyme activity to hydrolyze polysorbate is determined by free DNA content. The method effectively solves the problems of insufficient sensitivity, complex operation and unstable result in the traditional detection method, obviously improves the detection precision and the experimental operation efficiency, enhances the quality monitoring in the drug research and development stage and the safety guarantee of the final product, improves the quality control level of the protein biological drugs, and has a wide application prospect. The effectiveness and the safety of the protein biological medicine in clinical medication are ensured.

The utility model belongs to the technical field of mercury removal of wastewater, and particularly relates to a mercury removal system suitable for flue gas washing wastewater, which comprises a PH (potential of hydrogen) adjusting area, a mercury removal reaction area, a coagulation area, a flocculation area, a settling area, a sand filter tank, a carbon filter tank, a resin tank and a wastewater inlet arranged on the PH adjusting area. The settling zone, the sand filter tank, the carbon filter tank and the resin tank are connected through pipelines, a chemical precipitation method, an adsorption method and an ion exchange method are integrated into one system, most of inorganic mercury and elemental mercury are removed through a sulfide precipitation method, then organic mercury is removed through an activated carbon adsorption process, and the mercury removal efficiency is improved. Finally, residual inorganic mercury is removed through the principle of ion exchange with functional groups in the mercury removal resin, both organic mercury and inorganic mercury in the wastewater can be effectively removed, and the total mercury concentration in effluent is stably lower than 5 micrograms per liter. The system is small in occupied area, convenient to install, long in service life and low in operation cost.

The present application belongs to the field of light industry grease, and discloses a preparation method of diglyceride. The present application carries out pretreatment on the immobilized enzyme carrier, mixes free lipase and glycerol according to a certain proportion, adds the immobilized carrier into the mixed solution of the lipase and glycerol, and carries out immobilization through the adsorption method, so that the immobilized enzyme which has catalytic characteristics and can be used as a reaction substrate is prepared. The obtained immobilized enzyme can be used for the continuous production of diglyceride in a packed bed reactor. Compared with the traditional enzyme method for catalyzing glycerolysis reaction to prepare diglyceride, the immobilized enzyme obtained by the present application not only has catalytic effect, but also has enough glycerol adsorbed on the immobilized enzyme which can be used as a substrate to carry out glycerolysis reaction, so that the reaction efficiency is improved. Not only the problems of difficult recovery and poor reusability of free enzyme are solved, but also the problem of difficult continuous production due to the large viscosity of glycerol in production is solved.

The invention discloses an automatic box girder steel formwork rust removal system based on a laser technology and a using method. The system comprises a formwork support, a walking track, a door-type support, a laser generator, an air compressor, dust removal equipment and a control system. The gate-type support is located on walking rails on the two sides of the formwork support through walking wheels at the bottom and can move in the longitudinal direction of the formwork. A sliding table capable of moving transversely is installed on the door-type support, a sealing cover integrating a laser emitting end, a high-pressure gas nozzle and a dust removal suction port is hung at the bottom of the sliding table, and the sealing cover and the surface of the formwork form a closed operation cavity through a bottom flexible sealing edge. The system is further provided with a wall-climbing robot capable of moving and working on the vertical face of the formwork and a complex area, and the wall-climbing robot carries an integrated working head and is fixed in a magnetic adsorption or negative pressure adsorption mode. Through cooperative operation of the door-type support and the wall-climbing robot, efficient, high-quality and pollution-free automatic rust removal of the whole surface of the large box girder steel formwork is achieved, and the defects that a traditional method is low in efficiency, many in dead angle and large in pollution are overcome.

The invention discloses a petroleum-contaminated soil remediation agent based on synergism of a fixed microbial inoculum and free bacteria and application of the petroleum-contaminated soil remediation agent, and belongs to the technical field of soil pollution control and treatment. The petroleum-contaminated soil remediation agent is prepared from an immobilized microbial agent prepared by immobilizing stenotrophomonas by adopting rape straw biochar and free pseudomonas, wherein the immobilized microbial agent is prepared by immobilizing stenotrophomonas by adopting rape straw biochar; wherein both the stenotrophomonas and the pseudomonas are preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation numbers of the stenotrophomonas and the pseudomonas are respectively CGMCC No.34532 and CGMCC No.34533. According to the method, the petroleum-contaminated soil is repaired by adopting a technology of combining the immobilized microbial inoculum and the free degrading bacteria for the first time, so that the advantages of the immobilized microbial inoculum are reserved, and the degrading effect is improved through the synergistic effect of the immobilized microbial inoculum and the free bacteria. In addition, an adsorption method is used for immobilization, operation is simple, chemical reagents such as an embedding agent and a cross-linking agent are not added, and secondary pollution is avoided.

An electrostatic chuck system is characterized by comprising: an electrostatic chuck for adsorbing an object to be adsorbed, the electrostatic chuck being provided with at least one cutout portion penetrating from an adsorption surface on which the object to be adsorbed is adsorbed to a surface on the opposite side; an image capturing member capable of capturing an image of the object to be adsorbed through the cutout portion; and a determination means for determining the degree of adsorption between the electrostatic chuck and the object to be adsorbed on the basis of the image of the object to be adsorbed captured by the imaging means.

The invention relates to an extracellular vesicle-frozen gel scaffold as well as an integrated preparation method and application thereof, and belongs to the technical field of biotechnology and tissue engineering materials. The problems that in the prior art, extracellular vesicles are prone to being damaged by low temperature in the frozen gel preparation process, a traditional cryoprotectant is not compatible with a stent process, and burst release and action time is short in a vesicle physical adsorption method are solved. The method comprises the following steps: mixing extracellular vesicles with a trehalose solution, and standing to obtain a vesicle-trehalose mixed solution; mixing with the support material prepolymer solution, and adding a photoinitiator to form a composite precursor solution; freezing the solution, and performing cross-linking solidification to form a three-dimensional porous gel scaffold; and unfreezing and washing to obtain the stent. The trehalose is introduced as a cryoprotectant, vesicle activity protection and stent structure forming are synchronously achieved in low-temperature forming, and the prepared stent can achieve controllable slow release of vesicles and has good application prospects in the field of tissue repair and regeneration.

The invention relates to an adsorption method of an adsorption type unhooking robot, the adsorption type unhooking robot is used for carrying out unhooking operation on a car coupler on a train, the adsorption type unhooking robot comprises a fixing device and an unhooking mechanical arm, and the fixing device comprises a 3-PRS assembly, an adsorption base assembly, a clamping arm assembly, a worm reducer assembly, a controller and a motor lead screw assembly; the 3-PRS assembly is connected to the adsorption base assembly, and the adsorption base assembly is further connected with the worm reducer assembly and the motor lead screw assembly. The clamping arm assembly is connected with the worm reducer assembly, and the motor lead screw assembly is connected with the worm reducer assembly. The adsorption method comprises an adsorption stage and a fixing stage, and in the adsorption stage, the 3-PRS assembly is adsorbed and attached to an adsorbed object on a train under the action of the controller; in the fixing stage, the controller controls the motor lead screw assembly and the worm reducer assembly to act so that the clamping arm assembly can clamp an adsorbed object, the coupler on the train can be removed at the same time, automatic operation can be achieved, and the working efficiency is improved.

The invention relates to the technical field of purification of tetraethoxysilane, and discloses a deep dechlorination method of tetraethoxysilane, which comprises the following steps: S1, heating and activating a molecular sieve, and cooling to room temperature; s2, adding the molecular sieve activated in the step S1 into a tetraethoxysilane raw material, and stirring for 1-12 hours; and S3, filtering the reacted material to obtain a liquid phase, and rectifying to obtain purified tetraethoxysilane. A molecular sieve adsorption method is adopted, a molecular sieve is activated and then added into TEOS to be stirred, chlorine with the content of hundreds of ppb in the TEOS can be removed to be within 20 ppb, more preferably within 10 ppb, and purified tetraethoxysilane is obtained after rectification. The whole process is simple, efficient and low in cost.

The invention discloses a composite molten salt system and an adsorption method for efficiently adsorbing SO2 and CO2 gas in the oxidation process of nuclear-grade cation exchange resin, and belongs to the field of high-temperature heat treatment of solid wastes. According to the method, magnesium oxide is added on the basis of a ternary eutectic carbonate system, absorption of the molten salt to SO2 and CO2 generated in the nuclear-grade cation exchange resin molten salt oxidation treatment process is enhanced, pollution of sulfur-containing gas can be reduced, and carbon emission in the reaction process can also be reduced. The added magnesium oxide can react with CO2 and SO2 in a chemical adsorption manner to generate MgCO3 and MgSO4. MgO is added, so that the alkalinity of the system can be increased, and further oxidation of the resin is promoted. In conclusion, due to the addition of MgO, the content of gas products generated by complete oxidation of C and S elements in the tail gas is reduced while effective oxidation of the waste resin is realized.

The invention relates to the technical field of mineral recovery, in particular to a comprehensive recovery method for various valuable minerals in bauxite, which comprises the following steps: crushing and grinding the bauxite, and sequentially carrying out graded enrichment, surface modification activation and pre-desiliconization treatment to obtain activated ore pulp; mixing the activated ore pulp with a sodium hydroxide solution, carrying out high-temperature and high-pressure dissolution reaction, carrying out solid-liquid separation after the reaction to respectively obtain a sodium aluminate solution and activated red mud, and treating the sodium aluminate solution to obtain an aluminum oxide product; the method comprises the following steps: extracting and refining from Bayer process circulating mother liquor of a sodium aluminate solution through an adsorption method to obtain a metal gallium product; the activated red mud is subjected to deep reduction roasting, an obtained roasted product is subjected to ore grinding and then is subjected to magnetic separation, and an iron product is obtained; according to the method, various valuable minerals such as aluminum, gallium and iron can be synergistically recovered, and the extraction effect of gallium can be improved.

The present application belongs to the technical field of environmental remediation material preparation, and provides activated carbon gel precursor particles with both dehumidification and deacetaldehyde functions and a preparation method thereof. The present application first deposits a layer of manganese oxide catalyst on an activated carbon carrier in situ, solidifies a sodium alginate solution into initial gel microspheres by a liquid drop method; secondly, constructs a porous outer layer loaded with manganese oxide catalyst layer by layer through an alternating adsorption method of negative and positive polyelectrolytes, and carries out dehydration treatment on the microspheres through gradient solvent replacement; finally, grafts a layer of hydrophobic organosilane molecules on the outermost surface of the microspheres, and then obtains the precursor particles through vacuum drying. By placing the moisture absorption component and the catalytic component in different structural regions and hydrophobically modifying the surface of the particles, the mutual interference between the two functions is effectively avoided, so that the product can stably exert the dual functions of dehumidification and deacetaldehyde after moisture absorption, and at the same time has excellent storage stability.

The present invention relates to a pressure swing adsorption process wherein a compressed gas is regeneratively purified by means of an adsorbent to produce nitrogen and / or oxygen. More specifically, the present invention relates to a method and associated device for carrying out a pressure swing adsorption process with improved protection and an extended operating range.

A humidified adsorption method for capturing carbon dioxide from a gaseous mixture containing carbon dioxide, the method comprising: (i) contacting the gaseous mixture with a cation exchange material such that carbon dioxide in the gaseous mixture is adsorbed by the cation exchange material; and (ii) desorbing carbon dioxide from the cation exchange material by adding water; and optionally (iii) repeating steps (i) and (ii).

The invention discloses a biological material for efficiently removing organic pollutants in frozen and thawed soil as well as a preparation method and application of the biological material. The biological material is prepared by taking mixed biochar as an immobilization carrier and immobilizing a mixed bacterial agent by adopting an adsorption method, the mixed biochar is prepared by mixing carbonized corncob biochar and carbonized wheat straw biochar; the mixed bacterial agent is prepared from pseudomonas sp. SDR4 of which the preservation number is CGMCC (China General Microbiological Culture Collection Center) NO.14048, and Mortierella alpine JDR7 of which the preservation number is CGMCC NO.15183. The invention also discloses a preparation method of the mixed bacterial agent, and the mixed bacterial agent is prepared from the following components: pseudomonas sp. SDR4 of which the preservation number is CGMCC NO.14048 and Mortierella alpine JDR7. The biological material disclosed by the invention has the advantages of low cost, high removal efficiency, low temperature resistance and the like, and can quickly adapt to a complex soil environment and effectively play a role in degradation; and the biological material is a biodegradable material which does not need to be recycled.

The invention belongs to the technical field of unsymmetrical dimethylhydrazine waste gas treatment, and particularly relates to an unsymmetrical dimethylhydrazine production tail gas solid waste treatment method which comprises the following steps: S1, arranging a purification system and a monitoring instrument on a waste gas discharge pipeline; and S2, monitoring the content and concentration of waste gas and unsymmetrical dimethylhydrazine generated during unsymmetrical dimethylhydrazine production. S3, carrying out separation and filtration treatment on the waste gas by adopting a membrane separation technology according to the monitoring data; and S4, carrying out secondary monitoring on the waste gas and unsymmetrical dimethylhydrazine separated and filtered in the S3, and judging whether adsorption purification is completed or not. According to the invention, the unsymmetrical dimethylhydrazine and the waste gas generated by the unsymmetrical dimethylhydrazine can be effectively purified by utilizing a dual purification mode of combining a membrane separation technology with an activated carbon adsorption method.

The carbonaceous material according to the present invention has a mesopore proportion of 6.4% to 50.0% (inclusive), an active black 5 value of 1.0 g / L to 8.0 g / L (inclusive), and an iodine adsorption amount of 1000 mg / g to 1600 mg / g (inclusive).

This invention discloses a blast furnace dehumidification device, relating to the field of blast furnace dehumidification technology. The blast furnace dehumidification device includes a rotor, a heat-conducting pipe, an adsorption container, a control system, and a regeneration fan. The rotor has a stator and a rotor, and is disposed inside a ventilation duct. The adsorption container is mounted on the surface of the stator and has holes that allow air to pass through. The heat-conducting pipe is located inside the adsorption container. A feeding device is disposed above the ventilation duct, containing adsorbent particles. A recovery device is disposed below the ventilation duct. The control system is connected to the rotor and the regeneration fan and is configured to: when the system enters winter adsorption mode, control the heat-conducting pipe to introduce a hot medium and start the regeneration device; when the system enters summer condensation mode, control the heat-conducting pipe to introduce a cold medium. This configuration allows for seasonal switching, utilizing a highly efficient condensation method in summer and a stable adsorption method in winter, achieving optimal energy efficiency throughout the year.