47results about How to "Long penetration time" patented technology

The invention relates to a preparation method of modified activated carbon fiber for adsorbing ultra-micro sulfur dioxide, belonging to the technical field of gas adsorption and separation. The method comprises the following steps: taking viscose-based activated carbon fiber which is oxidized by dilute nitric acid as a matrix, and taking tris hydroxyl methyl aminomethan, alanine, serine and arginine as modifiers; and successfully preparing chemically modified activated carbon fibers in which the surfaces are modified by much amidogen through a hydro-thermal reaction under certain conditions. Compared with the prior art, the preparation method has the following advantages: (1) a micromolecule modifier is used for chemically modifying the surface to keep the structural advantage of the activated carbon fibers such as high specific surface and more micro pores so that the activated carbon fibers simultaneously have abundant micro-pore structures and high activity reaction surfaces to represent relatively longer penetrating time and larger saturation adsorption capacity; (2) the modifying method is temperate in condition, small in pollution, energy-saving and environment-friendly, and easy for scaled production; and (3) the modified absorbing capacity can be increased to that 1 g of the absorbent can absorb 40-60 mg of SO2, which is improved by 4-6 times compared with the absorbing capacity of the absorbent before the modification.

A regeneration method of a sulfur absorption V2O5 / AC catalyst-sorbent is to arrange the catalyst-sorbent of a V2O5 / carbon-based carrier of 0.1wt percent to 5wt percent to a regeneration reactor after sulfur absorption, raise the temperature to 230 to 420 DEG C in the atmosphere with 0.05 to 1.0 percent of CO and regenerate for 10 to 120 minutes. The regeneration method has the advantages that the decoking activity and stability of regenerated catalyst-sorbent can be well recovered, the regeneration technique is simple and the maneuverability is high.

The present invention belongs to the field of air purification and water purification technology. Its technical scheme is characterized by that it utilizes various adsorption materials (such as various active carbons, molecular sieves, zeolites, silica gels and active carbon fibre, etc.) with high specific surface area and high-valent oxides of Mn (such as various MnO2 and Mn2O3, etc.), and makes them undergo the processes of mixing and stamping to obtain various filter materials (including plates type, cabinet type, column type and granules type, etc.). The polluted air (or sewage) can be passed through said filter material, the pollutant can be adsorbed on the material surface by adsorbing agent, after the pollutant is oxidated by oxide of Mn, it can be converted into CO2 and H2O, and the adsorbing agent can be regenerated, so that said invention can high-effectively purify air or sewage.

The invention relates to the technical field of indoor air purification and discloses an adsorbent with adsorption and oxidation synergistic effects on indoor toluene, and the loading capacity of potassium permanganate on an H-ZSM-5 molecular sieve is 0.05 to 1.The adsorbent has good oxidation performance and excellent absorption effect, toluene can be directly oxidized into benzoic acid, and the technical problem of vacant adsorption of indoor low-concentration toluene is solved. The invention further discloses a preparation method of the adsorbent with the adsorption and oxidation synergistic effects on the indoor toluene, H-ZSM-5 is used as an adsorption carrier, potassium permanganate is loaded on the adsorption carrier by virtue of dipping, and then drying is performed by a nitrogen blowing instrument. The preparation method has the advantages of simplicity, short consumed time and low cost, conforms to the concept of green chemistry and has a wide application prospect. The invention further relates to application of the adsorbent to indoor toluene treatment. An effective method is provided for indoor pollution gas treatment, and an important application value is realized in the aspect of life safety.

The invention provides efficient enrichment and separation equipment for ultralow-concentration gas. The efficient enrichment and separation equipment comprises an air compressor, a mass flow meter, a solenoid valve, an infrared ray gas analyzer, a vacuum pump and an online collection system. The equipment has the advantages that a double-tower adsorption and desorption system is arranged; one tower is used for adsorption while the other tower is used for desorption; room-temperature and normal-pressure absorption, vacuum desorption and reaction conditions are easy to realize and the possibility of industrial large-scale production exists; the ultralow-concentration gas which is lower than 0.5% can be separated and purified and the problem that mine gas which is lower than 0.1% can not be used. The adsorption tower is internally provided with three adsorption pipelines which are connected in series so as to prolong the gas penetration time and improve the adsorption efficiency of an adsorbent; the adsorption tower is internally provided with a buffering region and is connected with a desorption tower through a pipeline so as to reduce the energy consumption of the vacuum pump in the switching work process, and improve the economic efficiency; a multi-grade concentration lifting device can meet different working conditions and can recycle low-concentration methane in product gas so as to further reduce the discharging of the methane.

The invention relates to a preparation method of a kind of modified silicon gel absorbing agent used for protecting on-vehicle fuel batteries, which belongs to the branch of the non-metallic inorganic material technology and is applied to the field of gas absorption and separation. The preparation method uses 3-aminopropyl triethoxysilane as amino modifying agents, uses tetraethoxy silane as silicon gel precursors, and prepares and obtains modified silicon gel with uniformly decorated amino groups in a porous silicon gel framework through adding a certain number of amino modifying agents in the gel forming stage. The absorbing agent can be used for removing a trace amount of sulfur dioxide in the air, so cathodic catalysts of on-vehicle proton exchange membrane fuel batteries are protected from the poisoning effect of the sulfur dioxide. Compared with the prior art, the invention has the following advantages that: (1) the obtained absorbing agent has better capability for absorbing the trace amount of sulfur dioxide than active carbon fiber, the effect is shown through longer penetrating time and larger saturation adsorption capacity, in addition, the absorbing agent still has good absorbing capability when the humidity is lower; and (2) the obtained absorbing agent has simple and convenient preparation method, the operation is easy, the condition is mild, and the effects of energy saving and environment protection can be obtained.

The invention relates to an agricultural irrigation device comprising a planar sprinkling structure, a dynamic traction system, and a stainless steel telescopic pipe. The device is characterized in that the water inlet of the planar sprinkling structure is connected with one end of the stainless steel telescopic pipe; the other end of the stainless steel telescopic pipe is connected with a water source; a traction power is fixedly arranged on the foremost end of the planar sprinkling structure or is fixed at a place several meters right in front of the planar sprinkling structure; a plurality rows of small holes are drilled on the back-lower parts of the sprinkling horizontal tubes of the planar sprinkling structure; the planar sprinkling structure can travel forward under the traction of the power; a controllable water pressure gauge can generate induction signals according to water pressures, and the speed of the planar sprinkling structure traveling forward can be controlled; manual control and remote control can also be realized; the planar sprinkling structure can be folded, such that the device can be easily moved and stored when not in use.

The invention provides a monolithic composite porous carbon adsorption material for separating methane and nitrogen, and a preparation method thereof, wherein the monolithic composite porous carbon adsorption material is a macropore-mesopore-micropore tandem composite porous carbon, the pore size range of the micropores is 0.50-1.20 nm, and the surface has polar sites and can be regulated. According to the present invention, the monolithic composite porous carbon adsorption material has a dynamic methane adsorption amount of up to 0.79 mmol.g<-1> at a normal temperature under a normal pressure, has methane / nitrogen separation selectivity of 16, has good industrial application prospect, and further has a multi-level pore channel structure, wherein the macropores and the mesopores facilitatecan easily achieve the diffusion of methane, and the micropores can easily increase the adsorption amount of methane; the method for regulating the surface chemical property and the pore structure ofthe adsorption materials is simple and easy to control, and provides the reference for the design of adsorbents for difficultly-separated mixed gases; and the adsorption material of the invention hasgood application effect in the field of methane and nitrogen separation, and provides the technical support for the concentration and purification of unconventional natural gases such as coalbed methane and the like.

A refrigeration assisted adsorption type VOCs (volatile organic compounds) recovery device and recovery method belongs to the fields of energy utilization, resource recovery, environmental protection and the like. The device comprises a coarse filtration unit, a cooling unit, an absorption device, a fan, a vacuum pump and a branch diversion channel which are sequentially connected. The method comprises steps of coarse filtration, cooling for vapour removal and gas mixture cooling, adsorption, heating assisted vacuum desorption, cooling capacity recovery, exhausting and the like sequentially. The cooling unit comprises an evaporator, a compressor, a forced air cooling condenser, a liquid storage tank, a throttle valve and the like. The cooling unit is used for removing vapour in a gas mixture, and reducing the temperature of the gas mixture, so as to remarkably improve the subsequent absorption effect and prolong the service cycle of the absorption device. The recovery device is high in recovery efficiency, relatively low in cost, simple in structure, long in service life, and easy to control and operate, and is particularly suitable for recovery processing of low concentration VOCs, which are not suitable for condensation methods, in chemical engineering, automobile industry and other fields.

The invention discloses a regeneration method for an adsorbent, belonging to the technical field of flue gas purification. The regeneration method comprises the following steps: conveying an adsorbenthaving adsorbed sulfide into a regeneration reactor for contact with reducing gas, and reducing at least a part of the sulfide so as to obtain the adsorbent with reduced sulfide content and regeneration tail gas, wherein the adsorbent having adsorbed sulfide and the reducing gas are conveyed, in the form of parallel flow, into a reduction reaction section of the regeneration reactor for a reduction reaction, and the adsorbent and the reducing gas in the reduction reaction section have respectively reached temperatures required for the reduction reaction, or the adsorbent and the reducing gasin the reduction reaction section are respectively heated to temperatures required for the reduction reaction. The invention also discloses a flue gas purifying method. As the method is applied to regeneration of the adsorbent having adsorbed sulfide, the production amount of elemental sulfur during regeneration can be effectively inhibited, and the regenerated adsorbent presents prolonged penetration time.

The invention discloses a method for preparing an absorbing agent for medium-temperature gas desulfurization. The method comprises that an isometrical ferric nitrate solution is soaked in a Gamma-Al203 carrier isometrically, vacuum impregnation and ultrasonic wave impregnation are performed simultaneously, and the absorbing agent for medium-temperature gas desulfurization with an active componentof ferric oxide is obtained after vacuum drying and high-temperature roasting. During the preparation process of the absorbing agent for medium-temperature gas desulfurization, by the aid of ultrasonic and vacuum synergy effects, the specific surface area of the carrier is improved, the active component is loaded on the carrier uniformly simultaneously, a hole structure of the carrier is improved, component load and drying are completed under ultrasonic and vacuum action, the active component of the prepared absorbing agent is distributed uniformly on the surface of the carrier, the utilization rate of the active component is high, the breakthrough sulfur capacity is large, and the breakthrough time is long.

The invention provides a composite molecular sieve, a desulfurization adsorbent as well as a preparation method and application thereof. The preparation method of the composite molecular sieve comprises the following steps: adding a template agent for preparing a mesoporous molecular sieve into an alkaline solution, and stirring to obtain a clear solution; adding a metal zinc in-situ modified silicon-aluminum molecular sieve into the clear solution, and stirring to obtain a turbid liquid; adding a silicon source into the turbid liquid for stirring reaction, and filtering, drying and roasting after reaction to obtain the composite molecular sieve. The desulfurization adsorbent is prepared from the following raw materials in parts by weight: 30-70 parts of a composite molecular sieve, 1-10 parts of an IA group and / or IIA group metal oxygen-containing compound precursor and 30-60 parts of a binder. The desulfurization adsorbent disclosed by the invention is high in adsorption capacity, good in selectivity, high in desulfurization precision, capable of being recycled and long in service life; and C5 oil desulfurized by the desulfurization adsorbent can be directly used as a raw material for high-value utilization.

The invention discloses art renewal lacquer and a preparation method thereof. The art renewal lacquer has superior adhesion, lubricating property, film-forming property, water resistance, mildew resistance, wear resistance, stain resistance, resistance to acid and base and wash resistance, so that a construction process can be more smooth, and the problem of construction difficulty is solved. A wall space applied with the art renewal lacquer has the effects that obvious male and female faces are formed, the surface has silky touch, the stacking surface has clear lines and the overall color issoft. The problems in the conventional art renewal lacquer that poor construction often occurs during construction, the covering power is low, the effect of male and female faces is avoided, the stacking surface has no clear lines, the wall space smoothness is low, the wall space is free of silky touch and poor in wash resistance, wear resistance, stain resistance and resistance to acid and base and the like are solved.

The invention discloses a modification method of an activated carbon fiber filter screen for removing high-concentration formaldehyde in air, and a product and application of the activated carbon fiber filter screen. The method comprises the steps of activated carbon fiber filter screen pretreatment, pretreatment ozone surface strong oxidation treatment, drying treatment, ammonium persulfate modification treatment and drying treatment, wherein the obtained activated carbon fiber filter screen is laid flat and dried for 24h at the temperature of 110 DEG C in a drying oven, and a needed productis obtained. The preparation process is simple, the removal rate of the prepared modified activated carbon fiber filter screen reaches 100% when the formaldehyde concentration is 15 mg / m<3>, and the removal rate can be maintained for a long time.

The invention provides a coal gas enrichment apparatus with exhaust end air boosting and an enrichment method. The coal gas enrichment apparatus comprises a blower, an intake buffer tank, an intake control valve, a vacuumizing control valve, an exchange control valve, an exhaust control valve, a pressure equalization control valve, an adsorbing column, an air boosting control valve, an air boosting filter, a vacuum pump, a product gas buffer tank and an exchange reflow valve. The enrichment method of the coal gas enrichment apparatus comprises the steps of adsorbing, exchanging, equal pressuredrop, vacuumizing, equal pressure rise and air boosting; air is used to perform boosting from the exhaust end of the adsorbing column during adsorbing column boosting; the air reverse boosting step is performed at the exhaust end of the coal gas enrichment apparatus, penetrating time of the adsorbing column can be shortened, it can be avoided that the outlet end of the adsorbing column contains methane residue after boosting, and product gas methane concentration and recovery rate can be increased accordingly.

The invention belongs to the technical field of protection of electric materials, and discloses antirust paint for the electric materials. The antirust paint is prepared from defoamer, coalescing agent, petroleum sodium sulfonate, sodium carboxymethylcellulose, silica gel powder, nanometer aluminum powder, mica powder, silicone emulsion, iron oxide red, normal butanol, n-butyl acetate, crylic acidand deionized water. The antirust paint has good rust resistance and corrosion resistance, and the preparing technology is easy and feasible.

The invention discloses preparation technology, products and application of inorganic strong acid ammonium salt modified cocoanut active carbon for removing formaldehyde in air at normal temperature.The method sequentially comprises the steps of vacuum pretreatment, surface hydrochloric acid treatment, drying and oxidation treatment, inorganic strong acid ammonium salt treatment and drying treatment, wherein the obtained coconut shell activate carbon is laid flat and dried for 24-48h at the temperature of 60 to 80 DEG C in a drying oven, and a needed product is obtained. The preparation technology is simple, and the removal rate of the prepared product modified coconut shell activate carbon can also reach 100% when the formaldehyde concentration is smaller than or equal to 2 mg / m < 3 > anf the effect lasting time is long.

The invention discloses a mud cake hardening enhancer for drilling fluid. The enhancer is characterized by composing polysiloxane, a mud cake hardener, a low molecular weight polymer, a film former and an organic chelating agent; the mass ratio of the mud cake hardener, the low molecular weight polymer, the film former and the organic chelating agent is 30-45:35-50:5-12:8-15:2-8. By adding the mudcake hardening enhancer to the drilling fluid and completion fluid, the properties of a drilling fluid mud cake can be effectively changed, the quality of the drilling fluid mud cake can be improved,the thickness of the mud cake can be reduced, the thin and tough mud cake can be formed, the strength of the mud cake can be increased, thereby improving the interface cementation strength during well cementing, the physical combination of a cementing interface is transformed into chemical affinity, thereby improving the interface cementation quality between the mud cake and a cement ring and a casing and the cement ring, the interface cementation permeability rate is reduced, the cementing quality rate is improved, the service life of oil and gas wells is prolonged, and a crude oil recoveryratio is correspondingly improved.

The invention relates to an intelligent folding irrigation machine. The intelligent folding irrigation machine comprises a plane watering structure formed by connecting stainless steel pipes, a power traction system, a stainless steel extension pipeline, a solar energy power source device and a multifunctional intelligent control system. The intelligent folding irrigation machine is characterized in that a water outlet of the plane watering structure is connected with one end of the stainless steel extension pipeline; the other end of the stainless steel extension pipeline is connected with a water source; the power traction system is fixedly arranged at the foremost end of the plane watering structure or fixed at a position several meters right ahead the plane watering structure; a plurality of rows of small holes are drilled in a spray horizontal pipe of the plane watering structure, and the plane watering structure can move forward under the traction of power; the forward moving speed of the plane watering structure can be manually, remotely or intelligently controlled; the plane watering structure also can be driven by a heat engine which is used as power, or driven manually; and the plane watering structure is also telescopic and foldable.

The invention discloses a preparation method of a stacking-coral-like biomass-charcoal-based catalyst. The preparation method comprises the following steps: cleaning and crushing a biomass raw material, and conducting carbonizing under the protection of inert gas; performing grinding, then carrying out washing with water to remove impurities on the surface of a carbonized material, and then conducting drying to obtain a biomass-charcoal-based carrier; mixing the biomass-charcoal-based carrier, a nitrate solution and nitric acid in a reaction kettle, and then performing a hydrothermal reaction to prepare a biomass-charcoal-based catalyst precursor; and roasting the biomass-charcoal-based catalyst precursor in an inert atmosphere to obtain the stacking-coral-like biomass-charcoal-based catalyst. Compared with a traditional impregnation method, the catalyst prepared by the method disclosed by the invention has the advantages that an active component has a unique morphological structure, so the active component is exposed more sufficiently, and the catalyst can adapt to different flue gas atmospheres to remove different sulfur-containing gases; the activity of the catalyst is higher, penetration time is longer, and the sulfur capacity of the catalyst is larger; and raw materials are wide in source, cost is low, and the method is suitable for industrial production and market popularization and application.

The invention relates to a perfluoroisobutyronitrile / carbon dioxide recovered insulating gas adsorption, purification and recycling method, which comprises the following steps: (1) carrying out adsorption and purification: introducing recovered insulating gas into a fixed bed adsorption column filled with an adsorbent, and removing most organic impurities, water and HF; and (2) reproportioning the gas: measuring the volume ratio of the perfluoroisobutyronitrile / carbon dioxide in the adsorbed mixed gas, and directly recycling after reproportioning the volume ratio. The adsorbent adopted by the invention can effectively adsorb impurities in the perfluoroisobutyronitrile recovery gas, the adsorption rate of organic impurities reaches 99.1%, and meanwhile, the adsorbent also has a very good removal effect on moisture and HF. The recovered insulating gas subjected to primary adsorption can meet the lowest impurity requirement, the perfluoroisobutyronitrile and carbon dioxide do not need to be purified and blended respectively, only the adsorbed gas needs to be supplemented to the required perfluoroisobutyronitrile / carbon dioxide ratio, the method is simple and practical, and the recycling cost is greatly reduced.

The invention provides a multi-tower parallel type drying and purifying process and device in order to overcome the defects that an existing gas drying and purifying scheme of a double-tower structureis high in manufacturing cost, large in supporting facility installed power, large in equipment occupied area and incapable of achieving a better dew point and longer impurity gas penetrating time. Mdrying towers are used for adsorption, N drying towers are used for graded regeneration, and compared with traditional double towers, the power distribution power and public system configuration canbe greatly reduced; a fan is used as a power source during regeneration; closed-loop cold blowing is carried out on the regenerated drying tower from bottom to top, residual heat in the tower can be effectively utilized, an upper-layer adsorbent is deeply desorbed, residual water in the adsorbent is transferred to an inlet of the adsorption tower, more reasonable residual water content distribution is formed, and a better dew point and longer foreign gas penetration time can be achieved after switching.

The invention discloses a preparation method of anti-cracking and anti-corrosion concrete, and relates to the technical field of concrete. According to the invention, kitchen residues, cement and fly ash are used as raw materials, heat treatment is carried out, semi-carbonization is realized, an aggregate-like filler with apparent strength and certain internal toughness is obtained, the anti-cracking effect of concrete is improved, and then secondary activation and secondary grinding modification are carried out to obtain a hydroxylated ultrafine filler containing an inorganic corrosion inhibitor. The release of the inorganic corrosion inhibitor can be effectively controlled, and the anti-corrosion effect of the concrete is realized; then, after the pre-emulsion precursor is preliminarily mixed with coarse and fine aggregates, cement, superfine filler and other raw materials are added, the pre-emulsion precursor forms a tough net-shaped structure in the concrete, the crack resistance of the concrete is further improved, meanwhile, the superfine filler is adsorbed on the surface of the net-shaped structure and is self-stacked, the net-shaped structure is gradually expanded, and the crack resistance of the concrete is improved. The anti-corrosion performance and the anti-cracking performance of the concrete are further improved.

The invention provides a modified small-pore molecular sieve adsorbent, and a preparation method and a use thereof. The modified molecular sieve adsorbent comprises: a carrier; and an active componentloaded on the carrier, and the active component comprises an alkaline earth metal and / or a transition metal, wherein a weight ratio of the active component to the carrier is 0.01-0.5, preferably 0.01-0.3 and more preferably 0.02-0.2; and the carrier comprises a molecular sieve having an average pore size of 0.001-2 nm. The modified molecular sieve adsorbent can adsorb ammonia gas at normal temperature (20-30 DEG C), has the characteristics of large adsorption capacity and long penetration time, and can well meet the practical application requirements. The modified molecular sieve adsorbent ofthe present invention can be used for recovering ammonia gas generated by agricultural sources such as breeding industry plants, and also can be used to treat industrial flue gas and escape ammonia generated in motor vehicle (diesel vehicle) tail gas SCR systems.

A refrigeration assisted adsorption type VOCs (volatile organic compounds) recovery device and recovery method belongs to the fields of energy utilization, resource recovery, environmental protection and the like. The device comprises a coarse filtration unit, a cooling unit, an absorption device, a fan, a vacuum pump and a branch diversion channel which are sequentially connected. The method comprises steps of coarse filtration, cooling for vapour removal and gas mixture cooling, adsorption, heating assisted vacuum desorption, cooling capacity recovery, exhausting and the like sequentially. The cooling unit comprises an evaporator, a compressor, a forced air cooling condenser, a liquid storage tank, a throttle valve and the like. The cooling unit is used for removing vapour in a gas mixture, and reducing the temperature of the gas mixture, so as to remarkably improve the subsequent absorption effect and prolong the service cycle of the absorption device. The recovery device is high in recovery efficiency, relatively low in cost, simple in structure, long in service life, and easy to control and operate, and is particularly suitable for recovery processing of low concentration VOCs, which are not suitable for condensation methods, in chemical engineering, automobile industry and other fields.

The invention relates to a farmland irrigating machine. According to the graphical representation and introduction and a trial result, the farmland irrigating machine has several outstanding expressions that 1, a water spray area is large, water flow is dispersed, and water flows slowly and does not have impact force on crops and the ground, so a farmland is irrigated uniformly, and water has enough time to permeate into soil; 2, the farmland irrigating machine can move automatically, so the physical labor of peasants is relieved; 3, the farmland irrigating machine can be folded, and is convenient to move; 4, raw materials are sufficient, and the farmland irrigating machine does not rust and is not obsolete; 5, joints of pipe fittings are movable joints and are convenient to disassemble and maintain; 6, the farmland irrigating machine is easy to manufacture, and can be manufactured by simple trainings; 7, large equipment is not needed to be invested; and 8, the production cost is low, namely the price of a complete set of equipment is about 1 thousand yuan, so the peasants can accept the price easily under the current economic condition. Therefore the farmland irrigating machine can be widely popularized.

The invention discloses a zinc-based modified molecular sieve adsorbent for removing tetrafluoroethylene in carbonyl fluoride and application of the zinc-based modified molecular sieve adsorbent in an adsorber, and belongs to the technical field of adsorption materials for electronic-grade gas purification. The preparation method comprises the following steps: (1) soaking a 5A molecular sieve in an ammonium citrate aqueous solution, treating at 60-90 DEG C for 4-8 hours, and drying to obtain a pretreated molecular sieve; (2) putting the pretreated molecular sieve into a zinc source aqueous solution, reacting at 70-90 DEG C for 12-24 hours, and drying after the reaction is finished; (3) roasting the dried product in an air atmosphere for 6-10 hours; and (4) circularly carrying out the steps (1)-(3) for 1-5 times to obtain a finished product. The prepared zinc-based modified molecular sieve has the advantages of high adsorption selectivity, long penetration time, excellent regeneration performance and the like, and is suitable for a refining process of electronic-grade carbonyl fluoride (the purity is greater than or equal to 99.99%) in semiconductor manufacturing.

The invention relates to a molecular sieve ceramic membrane material for olefin purification as well as a preparation method and application of the molecular sieve ceramic membrane material. In the molecular sieve ceramic membrane material, the particle sizes of molecular sieve particles supported on the surface of the ceramic material are 0.1-3 [mu]m, and the thickness of a molecular sieve layeris 3-5 [mu]m; during preparation, ceramic material pretreatment, molecular sieve seed crystal pre-coating and sealed crystallization are sequentially carried out; and the molecular sieve ceramic membrane material is used for removing a polar oxygenated compound in a gaseous olefin flow to be 1ppm or below. Compared with the prior art, the molecular sieve ceramic membrane material prepared by the preparation method of the invention has the molecular sieve layer with higher mechanical strength, larger specific surface area and uniform thickness, in addition, the molecular sieve layer has no longitudinal or horizontal cracks, has no air pores in the surface and is high in bonding strength and not easy to fall off; and when the polar oxygenated compound in the olefin flow is adsorbed, the purification depth is 1ppm or smaller, so that not only is the mass transfer resistance lower, but also the energy consumption is lower, and the regeneration capacity is high.

The invention discloses waterborne antirust paint and a preparation method thereof. The waterborne antirust paint is prepared from, by mass, 10-25 parts of waterborne acrylic acid modified epoxy ester, 0.6-1.2 parts of neutralizer, 20-30 parts of deionized water, 0.5-1.5 parts of dispersing agents, 0.2-0.5 part of defoaming agent, 14-18 parts of iron oxide red, 2-4 parts of mica powder, 6-10 parts of modified zinc phosphate, 10-14 parts of precipitated barium sulphate, 1-2 parts of propylene glycol, 10-15 parts of styrene-acrylic emulsion, 0.5-1.0 part of coalescing agent, 0.5-1.0 part of waterborne flush rust prevention agent, 0.5-1.5 parts of thickening agents and 0.2-0.5 part of mildew prevention agent. The waterborne antirust paint is high in film hardness, good in adhesive force and excellent in corrosion-resistant performance and mechanical performance, dryness and initial water resistance of paint films are remarkably improved due to the addition of styrene-acrylic emulsion, and the flush rust restraining performance of paint films is improved due to the addition of the waterborne flush rust prevention agent. Water serves as the diluent for the waterborne antirust paint, VOC emission in production and construction projects is greatly reduced, and the waterborne antirust paint is safe, environmentally friendly and capable of being widely used for paint coating on the aspects of steel structures, pipelines, automobile parts and the like.