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32results about How to "Fast desorption rate" patented technology
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Catalytic module capable of removing formaldehyde at room temperature and preparation method thereof
ActiveCN105289298AImprove catalytic activity and purification efficiencyExcellent low temperature activity and removal efficiencyDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsChemistryLight source
The invention discloses a catalytic module capable of removing formaldehyde at room temperature and a preparation method thereof. The catalytic module comprises a skeleton carrier, coatings and catalyst layers, the skeleton carrier is a foam ceramic structure with three-dimensional pore channels, and the foam ceramic structure is internally provided with multiple pore channels which are interwoven into a net-shaped structure and arranged in any one of the X direction, the Y direction and the Z direction; the coatings are evenly coated on the surfaces of the pore channels in the foam ceramic structure and the other surface of the foam ceramic structure, and the catalyst layers are highly dispersed on the coatings. By means of the catalytic module capable of removing the formaldehyde at the room temperature and the preparation method thereof, at the room temperature and environment humidity, low-concentration formaldehyde can be oxidized into H2O and CO2, excellent low-temperature activity and removing efficiency are achieved, and the formaldehyde removing efficiency can be kept above 98 percent at the airspeed SV equal to 50,000 h<-1>. The preparation process is simple, the precious metal load is low, and accessory equipment such as light sources and heating are not needed. The catalytic module is suitable for air purification of closed and semi-closed spaces such as living rooms, office buildings, schools, dormitories, shopping malls, furniture markets and automobiles.
Owner:展宗城
Organic waste gas adsorbing recovery device and process
ActiveCN103877827AHigh recovery rateAvoid cokingDispersed particle separationProduct gasHigh concentration
The invention discloses an organic waste gas adsorbing recovery device and a process. The device comprises at least two macromolecule resin adsorbing towers, a heat pump, a vacuum pump, a condenser, a liquid storing tank and the like, wherein the macromolecule resin adsorbing towers are internally provided with waste gas inlet regions, purifying regions for adsorbing and purifying gas and a purifying gas discharging region; the purifying regions are provided with adsorbing layers which are horizontally paved, the adsorbing layers are composed of multi-hole supporting plates fixed on the adsorbing towers, heat exchanging coils paved above the multi-hole supporting plates and macromolecule resin layers which are fully paved on the cross sections of the adsorbing towers above the heat exchanging coils successively in a overlaying manner, and the heat exchanging coils are provided with inlets and outlets communicated with the heat pump arranged outside the adsorbing towers. The organic waste gas adsorbing recovery device and the process provided by the invention have the advantages that a non-flammable macromolecule resin is adopted as an adsorbing material, the removing rate of middle-high concentration organic waste gas is more than 98%, the organic waste gas recovery rate is more than 95%, the resin is fully regenerated, and the organic waste gas can reach the discharge standard.
Owner:杭州润信科技有限公司
Regular-structure adsorbing material preparation, adsorbing material and application
InactiveCN106807330ASimple manufacturing processRepeatability is easy to controlOther chemical processesDispersed particle separationMaterials preparationAdhesive
The invention relates to a preparation method of a regular-structure adsorbing material applied to gas adsorption and separation. The regular-structure adsorbing material is prepared from a base body, adhesive and a metal-organic framework material. The preparation method comprises the steps of mixing metal-organic framework material powder, solvent, adhesive and the like to form slurry; then forming a coating on the surface of the base body through spray coating, brush coating or dipping; coiling and shaping the base body to prepare the regular-structure adsorbing material. The regular-structure adsorbing material has a simple preparation technology and good repeatability; the adsorbing material has rich porous structures and has quick adsorbing and desorbing efficiency when being applied to a gas adsorbing and separating process; the adsorbing material is especially suitable for a purification process of separation, concentration, purification and the like of large-capacity gas mixture.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Desorption and regeneration method for organic matter adsorbent
InactiveCN103447015AReduce dosageReduce separation loadCombustible gas purificationEnergy based chemical/physical/physico-chemical processesDesorptionWater vapor
The invention discloses a desorption and regeneration method for an organic matter adsorbent. The method is characterized in that an organic matter adsorbent desorption and regeneration device of a microwave generator is arranged in a desorption tower; the to-be-desorbed adsorbent with organic matters is put in the desorption tower; steam is aerated from the top of the desorption tower; the microwave generator is started, wherein the microwave power is 500-10000W; desorption is carried out for 2-30 minutes; the desorbed organic matters and steam flow out from a steam outlet at the bottom of the desorption tower and enter a condenser for condensation; then the steam is cut off, nitrogen is aerated from the top of the desorption tower, and the nitrogen flows out from the bottom, wherein the microwave power is 200-2000W; drying treatment is carried out for 2-20 minutes; the microwave generator is turned off, and the nitrogen is cut off; the desorbed adsorbent is obtained. According to the method, the desorption rate is improved by a large margin by combining steam and the microwave technology, and less desorption residue is left.
Owner:ZHEJIANG UNIV OF TECH
Method for separating n-alkane from C5 to C6 alkane isomerized products
Disclosed is a method for separating normal alkane from C5 to C6 alkane isomerized products. Isopentane is removed from raw materials, and the obtained materials are added into an adsorption separation post to adsorb normal alkane under 2.0-4.0 MPa, 100-150íµ and liquid phase condition, after saturation by adsorption, the adsorption separation post is flushed with flushing agent of isopentene, then desorbed by desorbing agent of C7 to C9 normal alkane. The method can separate normal alkane in light hydrocarbon isomerized products, and the used desorbing agent is less, the desorbing time is short.
Owner:CHINA PETROLEUM & CHEM CORP +1
Prepn and application of titanium silicate adsorbent with high adsorption performance
InactiveCN1387942AImprove toughnessHigh rotational speed, corresponding energy requirements for turning the dehumidification wheelOther chemical processesSilicon compoundsPartial hydrolysisSorbent
The material for preparing titanium silicate adsorbent has molar ratio between Si and Ti of 8-20,and the proportion among alkoxide, water and polyethylene glycol of 1 to 5-15 to 0.002-0.005. The preparation includes the steps of sol preparation and titanium silicate preparation. The sol preparation includes partial hydrolysis of ethanol solution of silanolate, adding ethanol solution of titanic alkoxide while heating for complete hydrolysis; and adding polyethylene glycol for condensation to form sol. In the titanium silicate preparation, the sol is prepared into hydrogel through oil-free formation process and the hydrogel is then prepared into nano spherical titanium silicate via washing, drying and sieving. The titanium silicate product has high adsorption performance and is used in producing core of dehumidifying wheel.
Owner:SOUTH CHINA UNIV OF TECH
Thermo-sensitive solid amine fiber material as well as preparation method and application thereof
ActiveCN104358106AWater absorption changeTemperature responsivePhysical treatmentOther chemical processesFiberMaterials science
The invention discloses a thermo-sensitive solid amine fiber material as well as a preparation method and application thereof. The thermo-sensitive solid amine fiber material is prepared by introducing amine and thermo-sensitive functional groups to the surface of base fiber through synthesis. By adopting the fiber material, the water absorption rate of the material can be changed and controlled by adjusting the change of ambient temperature, and the fiber material can be also controlled to have different water absorption rates by regulating and controlling different mole ratios of thermo-sensitive groups to amino. The fiber material can be applied to the field of intelligent special fiber products or the field of CO2 adsorption, the highest adsorption capacity of the fiber material to CO2 at 35 DEG C and 40 DEG C can be up to 3.8mmol / g, and moreover, CO2 can be completely desorbed at 70 DEG C within 30 minutes after being adsorbed by using the fiber material, so that the thermo-sensitive solid amine fiber material has the advantages of low desorption energy consumption and rapid desorption velocity.
Owner:SUN YAT SEN UNIV
Preparation technology of bamboo columnar carbon with ultrahigh performance
InactiveCN106512938AHigh strengthImprove adsorption capacityGas treatmentCarbon compoundsActivated carbonDesorption
The invention discloses a preparation technology of a bamboo columnar carbon with ultrahigh performance. The preparation technology comprises steps as follows: S1), selection of a raw material: the raw material is a bamboo carbonized material; S2), grinding and sieving: the raw material is sieved with a 325-mesh sieve, and the bamboo carbonized material of 325 meshes or fewer than 325 meshes is taken as one raw material; S3), powder grinding and material mixing: a small amount of petroleum asphalt is added to the bamboo carbonized material powder of 325 meshes or fewer than 325 meshes for powder grinding and mixing treatment, and a first mixture is obtained; S4), stirring: water is added to the first mixture for stirring; S5), pre-extrusion; S6), pressing and extrusion molding; S7), segmented drying; S8), carbonizing; S9), gradient type activation: the carbonized material is put in an activating furnace to be activated for 1-2 h at the temperature of 750-850 DEG C and then is activated for 1-3 h after the temperature is increased to 850-950 DEG C, and the bamboo columnar activated carbon is obtained. The bamboo columnar activated carbon prepared with the technology has the characteristics that strength, adsorbability and adsorption capacity are high, the ash content is low, adsorption speed and desorption speed are high, obvious cracks on the outer surface are avoided, the yield of follow-up carbonized and activated products is high and the like.
Owner:JIANGSU PURESTAR EP TECH CO LTD
Multiple segment steam stripping method for catalyst
ActiveCN1754625AImprove mass transfer efficiencyFast desorption rateCatalytic crackingCatalyst regeneration/reactivationLine tubingOperational stability
This invention relates to catalyze multiple section stripper method, which comprises the following steps: transporting the stripper catalyze agent flowing freely form top to down to the top stripper section bottom in the stripper with more than two sections of stripper to remove the mixed gas or liquid materials; the catalyze flowing to the top and then to the downside stripper section; repeating the above steps in the down stripper section to the down the stripper section; in the down stripper section, the catalyze flowing to the bottom of the stripper section from top to down for exhausting the catalyze gas outside stripper; extracting the above materials together with medium gas channel outside the stripper.
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparation method of novel ternary compound organic amine medicament capable of absorbing CO2 with little water
PendingCN109758871ALarge absorption loadImprove stabilityDispersed particle separationAir quality improvementAbsorption capacityFlue gas
The invention relates to a preparation method of a novel ternary compound organic amine medicament capable of absorbing CO2 with little water. The preparation method and the proportion are as follows:according to the molar ratio of 20 to (1-20) to 6, the novel ternary compound organic amine medicament is prepared by mixing DETA (diethylenetriamine), TETA (triethylenetetramine) or TEPA (tetraethylenepentamine) and MDEA (N-methyl diethanolamine) or PZ (piperazine) in a solution with a total amine concentration of 0.8 mol / L, according to the preparation conditions, the temperature is 293 K, thepressure is 101.325 Kpa, and the mixing condition is that every two preparation solutions are uniformly mixed at normal temperature and normal pressure. The preparation method of the novel ternary compound organic amine medicament capable of absorbing CO2 with the little water has the advantages that the novel ternary compound organic amine medicament is a flue gas CO2 absorbent with large absorption capacity, good stability of the solution, low energy consumption, high flue gas purification degree, large absorption load, low regeneration energy consumption of the absorbent, fast desorption rate, large desorption load, low oxidation degradation and thermal degradation degree of the solution and less corrosion to equipment.
Owner:SENUO TECH CO LTD
Technique for preparing m-cresol
InactiveCN101125800AAdvantages of preparation processHigh yieldOrganic chemistryOrganic compound preparationOrganic solventWater vapor
A preparation technical of m-cresol is that: M-cresol is diazotizated, and hydrolyzed while at the same time steam is distilled to prepare a distilled m-cresol hydrolysis liquid. The distilled hydrolysis liquid passes through a N3520 type macroporous resin, and is eluded by organic solvent; the m-cresol product is obtained after rectifying. The invention adopts steam to distil m-cresol generated by hydrolyzation in time, which produces little byproduct tarry matter and increases the yield rate of m-cresol; preparation of product and treatment of waste water are carried out at the same time, which reduces the waste water treatment procedure and simplify the progress of preparation technology; because the invention adopts N3520 type macroporous resin to dispose the distilled m-cresol hydrolysis liquid, the m-cresol is easily desorbed with a fast desorption rate and a short reaction cycle, thus being beneficial to the recycle of m-cresol. The preparation technology of m-cresol of the invention has a yield rate over 85 percent and purity over 99.5 percent.
Owner:ZHONGBEI UNIV
Zeolite particles for adsorption and/or desorption of gases and liquids
ActiveUS10137428B2Increase capacityHighly effectiveRespiratorsCarbon compoundsDesorptionSilicon dioxide
Owner:WR GRACE & CO CONN
Catalyst for preparing ethylene through acetylene selective hydrogenation and preparation method of catalyst
ActiveCN104707600AAvoid reunionHigh selectivityHydrocarbon by hydrogenationMetal/metal-oxides/metal-hydroxide catalystsFiberCarbon fibers
The invention relates to a preparation method of a catalyst for preparing ethylene through acetylene selective hydrogenation. The preparation method comprises the following steps: soaking carbon fiber pretreated in sol, and performing drying, roasting and oxidation corrosion after taking out the carbon fiber to obtain modified carbon fiber; loading an active component and assistant catalysis components on the modified carbon fiber through an impregnation method, and drying and roasting to obtain the catalyst for preparing ethylene through acetylene selective hydrogenation. A discontinuous coating is formed on the surface of the carbon fiber by using a sol-oxidation corrosion-impregnation technology to form a space obstacle to stop active metal agglomeration; the coating adjusts the surface property and the acidity of the carbon fiber, and facilitates improvement on the catalytic activity and the ethylene yield.
Owner:北京锦泰诚瑞科技发展有限公司
A catalytic module for eliminating formaldehyde at room temperature and preparation method thereof
ActiveCN105289298BGood activity at low temperatureImprove removal efficiencyDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsCoated surfaceAmbient humidity
The invention discloses a catalytic module for eliminating formaldehyde at room temperature and a preparation method thereof. The catalytic module includes a skeleton carrier, a coating and a catalyst layer. The skeleton carrier is a ceramic foam structure with three-dimensional channels, and the ceramic foam structure has a plurality of channels , the channels interweave into a network structure and the arrangement direction can be in any direction of X, Y and Z; the coating is evenly coated on the surface of the channels and the outer surface of the ceramic foam structure, and the catalyst layer is highly dispersed on the coating . The invention can oxidize low-concentration formaldehyde into H2O and CO2 at room temperature and ambient humidity, has excellent low-temperature activity and removal efficiency, and the removal efficiency of formaldehyde at a space velocity of SV=50000h-1 remains above 98%. The preparation process is simple, the load of noble metal is low, and no auxiliary equipment such as light source and heating are needed. It is suitable for air purification in closed and semi-closed spaces such as living rooms, office buildings, schools, dormitories, shopping malls, furniture markets, and automobiles.
Owner:展宗城
Intelligent constant temperature and ultrasonic wave promoting desorption integrated coal sample tank and using method thereof
InactiveCN108442972AIncrease desorption rateComplete desorptionMining devicesGas removalCoalEngineering
The invention discloses an intelligent constant temperature and ultrasonic wave promoting desorption integrated coal sample tank and a using method thereof. The coal sample tank comprises a tank bodyand a tank cover, the tank cover is provided with an exhaust pipe, and the exhaust pipe is provided with a gas flow meter and an air exhaust valve. A temperature regulating inner container is arrangedon the inner wall of the tank body, and a thermal insulating layer is further arranged between the temperature regulating inner container and the inner wall of the tank body. A temperature sensor isinstalled in the tank body, and an intelligent temperature control device is installed on the side wall of the tank body. The temperature regulating inner container and the temperature sensor are bothelectrically connected with the intelligent temperature control device. According to the intelligent constant temperature and ultrasonic wave promoting desorption integrated coal sample tank and theusing method thereof, intelligent dynamic regulation and ultrasonic wave desorption promotion of the temperature inside the tank body can be performed for arbitrary downhole temperature, and adsorption gas in a coal sample is evenly oscillated, so that the gas desorption rate in the coal sample is accelerated, the desorption is more complete, and the determination of gas content in underground coal samples is more accurate.
Owner:SOUTHWEST PETROLEUM UNIV
Multiple segment steam stripping method for catalyst
ActiveCN100351016CImprove mass transfer efficiencyFast desorption rateCatalytic crackingCatalyst regeneration/reactivationLine tubingEngineering
This invention relates to catalyze multiple section stripper method, which comprises the following steps: transporting the stripper catalyze agent flowing freely form top to down to the top stripper section bottom in the stripper with more than two sections of stripper to remove the mixed gas or liquid materials; the catalyze flowing to the top and then to the downside stripper section; repeating the above steps in the down stripper section to the down the stripper section; in the down stripper section, the catalyze flowing to the bottom of the stripper section from top to down for exhausting the catalyze gas outside stripper; extracting the above materials together with medium gas channel outside the stripper.
Owner:CHINA PETROLEUM & CHEM CORP +1
Regeneration method and gas distributor for molecular sieve in synthetic gas cooling box
ActiveCN111139107AReduce fillable spaceNo infiltration problemGas treatmentDispersed particle separationMolecular sieveSyngas
The invention provides a gas distribution plate. The gas distribution plate comprises a support ring, support beams and a main gas distribution plate body. The gas distribution plate is characterizedin that the support ring and the support beams are connected to form a support framework for supporting the main gas distribution plate body; the number of the supporting beams is n, one ends of the supporting beams are connected with the inner edge of the supporting ring, and the other ends of the supporting beams are connected with each other, so the supporting beams and the supporting ring forma conical surface; and the main distribution plate body comprises m layers of distribution plates, each layer of distribution plate is an annular plate consisting of n fan-shaped annular plates withuniform sizes, the annular plates are connected with the support beams, and each layer of distribution plate is distributed in a step shape along the conical surface. The gas distribution plate is beneficial for uniform distribution of gas. Based on the gas distribution plate, the invention further provides a molecular sieve regeneration method. The gas distribution plate is used in the method; and low-temperature plasma is used for improving the regeneration rate and effect of the molecular sieve, and hydrogen-rich gas is prevented from generating side reactions at high temperature and high pressure.
Owner:WANHUA CHEM GRP CO LTD
Preparation of iron-based biochar wave-absorbing material and method for repairing mercury-polluted soil through synergy of iron-based biochar wave-absorbing material and microwaves
PendingCN113857231AImprove adsorption capacityFast desorption rateContaminated soil reclamationCarbon preparation/purificationO-Phosphoric AcidIron salts
The invention discloses a preparation method of an iron-based biochar wave-absorbing material and a method for repairing mercury-polluted soil through the synergy of the iron-based biochar wave-absorbing material and microwaves. The preparation method comprises the following steps of: grinding biochar, soaking the biochar in 1-3mol / L phosphoric acid for a period of time; mixing the biochar with an iron salt solution in a mass ratio of 1: (3-6); and carrying out a hydrothermal reaction at 180-200 DEG C to obtain the iron-based biochar. The iron-based biochar is added into mercury-polluted soil according to a ratio of (5-10)%, the iron-based biochar is uniformly mixed with the mercury-polluted soil, and a reaction is performed in a microwave reactor at 150-220 DEG C for 60-120 minutes to remove mercury. The removal rate of the iron-based biochar wave-absorbing material for mercury in the mercury-contaminated soil reaches 90% or above; the iron-based biochar wave-absorbing material has the advantages of good remediation effect, short time, high efficiency and good application prospect.
Owner:GUANGDONG UNIV OF TECH
System and technology for recovering and using adsorbent
PendingCN108906011AAchieve regenerationGood repeatabilityCombustible gas purificationIncinerator apparatusSorbentDesorption
The invention discloses a system for recovering and using an adsorbent. The system comprises a vacuum desorption tower, a vacuum pump, a dedusting and wind-mixing box, a catalytic combustion fan and acatalytic combustion furnace which are sequentially connected by a pipeline, an adsorbent is placed in the vacuum desorption tower, organic matters adsorbed to the surface of the adsorbent are decomposed under the co-action of the vacuum desorption tower, the vacuum pump, the dedusting and wind-mixing box, the catalytic combustion fan and the catalytic combustion furnace and finally generate CO2and H2O, and the CO2 and H2O are discharged, so the recovery process is safe and efficient, and no secondary pollution is generated. The invention discloses a technology for recovering and using the adsorbent. The safe and efficient recovery of the adsorbent can be achieved through controlling the working states of the vacuum desorption tower, the vacuum pump, the catalytic combustion fan and thecatalytic combustion furnace by adopting the system for recovering and using the adsorbent.
Owner:苏州君绿环境技术服务有限公司
Zeolite molecular sieve regeneration device and regeneration method
InactiveCN110420628AFast desorption rateReduce energy consumptionOther chemical processesCombustible gas purificationVolatile organic compoundMolecular sieve
The invention discloses a zeolite molecular sieve regeneration device and a regeneration method, and belongs to the technical field of zeolite molecular sieves. The regeneration device comprises a microwave digestion tank, a microwave generator and a temperature controller; the microwave generator is arranged at an opening of the microwave digestion tank; the temperature controller is used for controlling the heating temperature of a zeolite molecular sieve; and a weighing device is used to weigh the heated zeolite molecular sieve. The regeneration method comprises the following steps: placinga saturated zeolite molecular sieve which adsorbs volatile organic compounds (VOCs) into the microwave digestion tank, starting the temperature controller and setting a temperature, starting the microwave generator, heating the zeolite molecular sieve, recording the time, turning off the microwave generator every one minute, taking out the zeolite molecular sieve for weighing, and repeating the heating and weighing processes until the weight of the zeolite molecular sieve does not change any more, so that regeneration is completed. According to the invention, microwave is utilized to rapidlyheat the zeolite molecular sieve, and the regeneration temperature is lower than the regeneration temperature of a conventional regeneration method, so that the regeneration method has the advantagesof high desorption rate, low energy consumption and the like. In addition, the desorbed substances after microwave desorption are directly condensed into a liquid state and thus are convenient to recycle, so that secondary pollution is avoided.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Novel method for regenerating oil liquid purifying resin
InactiveCN103433012AReduce heat damageHigh temperature rise desorption rateCombustible gas purificationFilter regenerationMicrowaveDesorption
The invention relates to the technical field of resin regeneration and recycling, and provides a novel method for regenerating and recycling adsorbent resin for purifying an oil liquid. The method comprises the following steps: in the process of desorbing and regenerating the oil liquid purifying resin, first, adding a certain amount of saturated AlCl3 liquor into the used oil liquid purifying resin; meanwhile, placing a mixture of the AlCl3 liquor and the oil liquid purifying resin to a microwave heating device to heat, desorb and regenerate; after microwave heating, filtering the AlCl3 liquor; drying particles of the oil liquid purifying resin, and stripping salt on the surface of the resin by air to obtain the regenerated resin. The novel method provided by the invention has the beneficial effects that the desorption rate in the regenerating process is great, the time consumed is less, the energy consumption is low, the production cost is low, the thermal injury of the regenerated resin is less, the desorption is relatively thorough and the regenerating and using performance is better.
Owner:CHONGQING TECH & BUSINESS UNIV
Catalyst for selective hydrogenation of acetylene to ethylene and preparation method thereof
ActiveCN104707600BAvoid reunionHigh selectivityHydrocarbon by hydrogenationMetal/metal-oxides/metal-hydroxide catalystsFiberCarbon fibers
The invention relates to a preparation method of a catalyst for preparing ethylene through acetylene selective hydrogenation. The preparation method comprises the following steps: soaking carbon fiber pretreated in sol, and performing drying, roasting and oxidation corrosion after taking out the carbon fiber to obtain modified carbon fiber; loading an active component and assistant catalysis components on the modified carbon fiber through an impregnation method, and drying and roasting to obtain the catalyst for preparing ethylene through acetylene selective hydrogenation. A discontinuous coating is formed on the surface of the carbon fiber by using a sol-oxidation corrosion-impregnation technology to form a space obstacle to stop active metal agglomeration; the coating adjusts the surface property and the acidity of the carbon fiber, and facilitates improvement on the catalytic activity and the ethylene yield.
Owner:北京锦泰诚瑞科技发展有限公司
Drying agent with heavy metal removal function and preparation method thereof
PendingCN113559683AImprove adsorption capacityFast desorption rateIon-exchange process apparatusGas treatmentSilicon dioxideAdsorption effect
The invention discloses a drying agent with a heavy metal removal function and a preparation method thereof. The preparation method comprises the following steps: 1, preparing bentonite filtered powder; 2, uniformly mixing the bentonite filtered powder, silicon dioxide nano powder and plant starch, adding water, and preparing a suspension; 3, adding an organic modifier and an auxiliary modifier into the suspension, adjusting the pH with a sodium hydroxide solution and then heating to prepare modifiedbentonite; 4, soaking the modified bentonite in a hydrochloric acid solution, washing the modified bentonite to be neutral with deionized water, granulating, and drying to obtain the spherical drying agent with the particle size of 1-3 mm. The prepared drying agent has a good adsorption effect on heavy metal ions, especially for heavy metal ions such as copper, chromium, nickel, lead, iron and zinc, the lead ion adsorption rate can reach 75% or above, and the chromium ion adsorption rate can reach 80% or above.
Owner:ANQING XINXIANGRUI CHEM CO LTD
Polypropylene foam material and preparation method thereof
ActiveCN111825877AReduce the lower limit of foaming temperatureGood foaming effectPolymer scienceAlcohol
The invention discloses a polypropylene foaming material and a preparation method thereof. The preparation method comprises the following steps: foaming polypropylene and small molecular alcohol undera CO2 condition, wherein the micromolecular alcohol is alcohol with a carbon chain of C1-4, and when the micromolecular alcohol is alcohol with a carbon chain of C1-4, the foaming temperature is higher than 125 DEG C but not higher than 140 DEG C, when the small molecular alcohol is alcohol with a carbon chain of C5-10, the foaming temperature is 125-140 DEG C, and the addition amount of the small molecular alcohol is 5-10wt% of that of CO2. The preparation method is simple in process, widens the lower limit of the foaming temperature of the polypropylene, enables the polypropylene to be foamed at a lower temperature, reduces the energy consumption, and reduces the requirements on the sealing performance of equipment. In addition, the polypropylene foaming material prepared by the methodis high in foaming ratio, relatively small in pore diameter and high in cell density.
Owner:EAST CHINA UNIV OF SCI & TECH
An organic waste gas adsorption recovery device and process
ActiveCN103877827BHigh recovery rateAvoid cokingDispersed particle separationHigh concentrationSorbent
Owner:杭州润信科技有限公司
A kind of method that cyclopentene hydration prepares cyclopentanol
ActiveCN103787836BSuitable physical structureImprove adsorption capacityOrganic-compounds/hydrides/coordination-complexes catalystsPreparation by hydroxy group additionCyclopenteneHydration reaction
The invention discloses a method for preparing cyclopentanol by hydrating cyclopentene. The catalyst is a titanium-based composite oxide loaded with rubidium phosphotungstic acid salt, the reaction temperature is 90°C-200°C, and the reaction pressure is 1.0MPa- Under the condition of 7.0MPa, cyclopentene and water undergo hydration reaction through a fixed bed reactor, the volume space velocity of cyclopentene is 1.5h-1~18h-1, and the molar ratio of cyclopentene to water is 1.0~10:1 . While the conversion rate of cyclopentene and the selectivity of cyclopentanol are obviously improved, the method has the advantages of simple operation process, easy separation of follow-up products, low cost, suitable for industrial application and the like.
Owner:CHINA PETROLEUM & CHEM CORP +1
A method for regeneration of molecular sieves in a syngas cold box and a gas distributor
ActiveCN111139107BReduce fillable spaceNo infiltration problemGas treatmentDispersed particle separationMolecular sieveSyngas
The present invention provides a gas distribution plate, the gas distribution plate includes a support ring, a support beam and a main body of the distribution plate, the support ring is connected with the support beam to form a support skeleton for supporting the main body of the gas distribution plate; There are n support beams, one end of the support beam is connected to the inner edge of the support ring, and the other end is connected to each other, so that the support beam and the support ring form a conical surface; the main body of the distribution plate includes m layers of distribution Each layer of the distribution plate is an annular plate composed of n fan ring plates of uniform size, the annular plate is connected to the support beam, and the distribution plates of each layer are distributed in a stepped shape along the conical surface. The gas distribution plate is conducive to the uniform distribution of gas. Based on the gas distribution plate, the present invention also provides a molecular sieve regeneration method. The method uses the gas distribution plate of the present invention to improve the regeneration rate and effect of the molecular sieve by using low-temperature plasma, and at the same time prevents hydrogen-rich gas from producing side effects under high temperature and high pressure. reaction.
Owner:WANHUA CHEM GRP CO LTD
Preparation method, product and application of high-efficiency treatment catalyst for ferrochromium-based nitric oxide at room temperature and pressure
ActiveCN110833832BExtended service lifeImprove activity at normal temperature and pressureDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystPhysical chemistry
The invention discloses a preparation method of a chromium-iron-based nitric oxide high-efficiency treatment catalyst at normal temperature and normal pressure, its product and application, which are prepared by a co-precipitation method. A small amount of potassium sulfate was introduced in situ during the precipitation process, and after subsequent calcination, the structure of the catalyst surface and interface was reconstructed, the physical and chemical properties of the surface and interface were adjusted, and the catalyst surface was reduced to the oxidation product NO. 2 The adsorption energy accelerates its desorption rate on the catalyst surface and improves the catalytic performance of nitric oxide at room temperature and pressure. The chromium-iron-based catalyst obtained by the invention has the characteristics of good NO oxidation activity at room temperature and high stability. The preparation method is simple, easy for large-scale production, and has a good application prospect.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH
Chromium-cobalt-based nitric oxide normal-temperature normal-pressure catalyst, and preparation method and application thereof
ActiveCN110833831AEnhanced interactionModulation of surface physicochemical propertiesDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystPhysical chemistry
The invention discloses a chromium-cobalt-based nitric oxide normal-temperature normal-pressure catalyst, and a preparation method and an application thereof. The chromium-cobalt-based nitric oxide normal-temperature normal-pressure catalyst is prepared by adopting an optimized coprecipitation technology, and the surface physicochemical properties of the chromium-cobalt-based catalyst are regulated by introducing a small amount of L-ascorbic acid in the precipitation process in order to improve the nitric oxide normal-temperature normal-pressure catalysis performance. The chromium-cobalt-basedcatalyst has the characteristics of good NO normal-temperature oxidation activity, high stability and the like. The preparation method has the advantages of simplicity, easiness in large-scale production, and excellent application prospect.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH
A kind of thermosensitive solid amine fiber material and its preparation method and application
ActiveCN104358106BWater absorption changeTemperature responsivePhysical treatmentOther chemical processesFiberMaterials science
The invention discloses a temperature-sensitive solid amine fiber material, a preparation method and application thereof. The temperature-sensitive solid amine fiber material is synthesized by introducing amino groups and temperature-sensitive functional groups on the surface of the matrix fiber; the fiber material can change the water absorption rate of the control material by adjusting the temperature of the environment, and can also control the temperature-sensitive group. The different molar ratios of amino and amino groups are used to control the fiber materials to have different water absorption rates. The fiber material can be used in the field of intelligent special fiber products or the field of CO2 adsorption. The maximum adsorption capacity of the material for CO2 can reach 3.8mmol / g under the conditions of 35°C and 40°C; Complete desorption in 30 minutes at 70°C, which has the advantages of low desorption energy consumption and fast desorption rate.
Owner:SUN YAT SEN UNIV
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