219results about How to "Short adsorption time" patented technology

The invention discloses a recycling device for an exhaust gas of a painted organic solvent. The recycling device comprises a painting fog removing device, a fan, an absorbing jar, a condenser and an oil-water separator which are connected in turn, wherein the painting fog removing device comprises a gas collecting tank, a cyclone dust collector and a bag type dust collector; the gas collecting tank is used for temporarily storing the exhaust gas of the organic solvent; and the gas collecting tank, the cyclone dust collector and the bag type dust collector are connected in turn. All componentsof the recycling device are reasonably and compactly jointed; collection efficiency is high; and the painting fog is efficiently removed while a trouble in frequently exchanging filter cotton is avoided. The invention also discloses a method for utilizing the recycling device for the exhaust gas of the painted organic solvent to recycle the organic solvent. The method comprises the following steps: removing the painting fog; absorbing; desorbing steam; condensing; and separating oil from water, wherein the step of removing the painting fog is carried out by changing the painting fog into painting powder and then efficiently removing the painting fog. Compared with a traditional process, the method is more reasonable, compact and labor-saving.

The invention discloses a process for preparing a composite adsorption material capable of simultaneously absorbing heavy metal ions and volatile organic substances in waste gas. The process comprises the following steps: (1) pretreatment of carbon nanometer pipes; (2) preparation of calcium chloride; (3) loading of calcium chloride; and (4) preparation of composite adsorption material, namely obtaining of the graphene-calcium chloride-carbon nanometer pipe composite adsorption material. According to the process for preparing the composite adsorption material capable of simultaneously absorbing heavy metal ions and volatile organic substances in waste gas, the high-adsorption-capacity composite adsorption material capable of simultaneously absorbing heavy metal ions and volatile organic substances in waste gas, which has the characteristics of nanometer structure, stable properties, large specific surface area and special property of adsorbing heavy metals by calcium chloride, is obtained, can be used for treatment of waste gas with high toxicity, low concentration and high fluidity, and has the advantages of short adsorption time and high adsorption efficiency.

The present invention provides a method for making modified jacobsite, Al-doped maghemite or modified maghemite nanoparticles that can be used to adsorb heavy metals, such as Cr(VI), found in wastewater. The magnetic nanoparticles can be separated using a magnetic field after adsorbing heavy metals from wastewater, and processed for reused.

The invention discloses a processing method and system for inferior crude oil. The method comprises the steps as follows: a, feeding hydrogen-containing gas and the inferior crude oil into a fluidized bed hydrogen absorption zone (I) of a fluidized bed riser reactor for contact with a first catalytic cracking catalyst and a hydrogen adsorption reaction to obtain a hydrogen absorption product; b, feeding the hydrogen absorption product obtained in the step a into a riser cracking zone (II) of the fluidized bed riser reactor for contact with a second catalytic cracking catalyst and a catalytic cracking reaction to obtain catalytic cracked oil-gas. The inferior crude oil processed by the system with the method has the advantages that the conversion rate of the inferior crude oil can be increased substantially, the yield of dry gas and coke is reduced, and accordingly, clean and efficient use of the inferior crude oil is realized.

The invention belongs to the technical field of chemical adsorption materials, and particularly relates to a nitrogen-doped magnetic porous carbon material as well as a preparation method and application thereof. A nitrogen-doped porous magnetic material N-PMC is successfully synthesized by utilizing a one-pot method, and the material has a relatively high specific surface area, developed porosityand a nitrogen-doped alkaline active site. The preparation method and the obtained product have the following advantages: (1) simple synthesis with the one-pot method, (2) large specific surface area, (3) ultrahigh methyl blue (MB) adsorption capacity, and (4) short adsorption time; the N-PMC has an ultrahigh MB adsorption capacity, wherein the maximum adsorption capacity is 1053.5 mg/g<-1>, andis far greater than that of an MB adsorbent reported in current literatures. In addition, the N-PMC has extremely good recyclability, and the material can be quickly separated from a solution under the action of an external magnetic field. The N-PMC is very likely to become an adsorbent, which has the broadest application prospects, for adsorbing the MB in water.

The method of treating industrial waste water containing cadmium with waste beer yeast includes treating waste yeast mud from brewery with alkali to obtain biological adsorbent of beer yeast, adding the biological adsorbent into industrial waste water containing cadmium for multiple stage of circular adsorption, adding fine husk powder via stirring and press filtering, incinerating the filter cake to obtain ash containing metal cadmium and recovering cadmium. The present invention has effective recovery of cadmium, simple technological process and no environmental pollution.

The invention discloses a method for preparing an ammonia nitrogen adsorbent by using a banana peel. According to the method, the ammonia nitrogen adsorbent can be prepared by dehydration, crushing, soaking and scrubbing. Compared with the common method using peels and shells to prepare an activated carbon adsorbent through heating at high temperature, the method disclosed by the invention is simple and feasible in operation and has no need of heating, low energy consumption and high yield. The invention also provides an application of the ammonia nitrogen adsorbent prepared by using the method disclosed by the invention. The ammonia nitrogen adsorbent product prepared by the method for preparing the ammonia nitrogen adsorbent by using the banana peel disclosed by the invention has good adsorption effect on the ammonia nitrogen in 10-150mg/L of ammonia nitrogen aqueous solution, the time for reaching adsorption balance is short, the adsorptive property is stable, and the ammonia nitrogen adsorbent can be used for adsorption treatment of nitrogenous waste water. Meanwhile, the method disclosed by the invention also can realize the reclamation of the banana peels.

The invention provides porous phosphorus removal ceramisites and a preparation method thereof. The ceramisites are prepared from the following raw materials in parts by weight: 55-85 parts of attapulgite, 10-30 parts of crop straws and 10-20 parts of lanthanum carbonate. The raw materials are subjected to the steps of blending, preparing a blank, sintering and cooling to prepare the porous phosphorus removal ceramisites. The ceramisites provided by the invention are simple in preparation process and high in adsorption rate, the cylinder pressure strength meets cylinder requirements on high-strength lightweight aggregates in national standards, the phosphorus adsorption capacity of the ceramisites in a wide pH value range of 1-12 is high, and the maximum phosphorus removal rate can reach 98.6%. Because the ceramisites have strong acid and alkali resistance, after adsorbing phosphorus and being eluted by a sodium hydroxide solution, the porous phosphorus removal ceramisites not only can realize recovery of adsorbed phosphorus but also can be obtained again, and are convenient to recycle, so that resources can be effectively saved. The ceramisites can be widely applied to the field of practical engineering to achieve an aim of treatment of wastes with processes of wastes against one another.

The invention discloses a short-hole-channel ordered mesoporous silica-sulfur-indium-zinc composite photocatalyst as well as a preparation method and application thereof. The short-hole-channel ordered mesoporous silica-sulfur-indium-zinc composite photocatalyst is prepared through the following steps of mixing ethyl orthosilicate with ZrOCl2, zinc salt, indium salt and a reducing agent so as to obtain a mixture, in the presence of a surfactant, sequentially performing sol-gel treatment, hydrothermal treatment and alcohol ultrasonic treatment, performing sucking filtration, performing cleaning and performing drying. According to the photocatalyst, the integration of adsorption and photocatalytic oxidation is realized, the photocatalyst has high adsorption properties and high photocatalytic activity on volatile organic compounds (VOCs), and hydroxyl radicals produced on the surface of a catalyst can effectively degrade the VOCs adsorbed and enriched by materials in an in-situ manner, so that the reaction rate and the reaction efficiency of photocatalytic degradation on the VOCs can be substantially improved, the photocatalyst can be used as an adsorbent or the photocatalyst for organic contaminants in the field of environmental protection, and the photocatalyst has wide environmental protection application potential.

The invention discloses a method for removing tetracycline in wastewater by virtue of a magnetic composite adsorbent. The method comprises the following steps: adding a self-made magnetic composite adsorbent into wastewater containing tetracycline so as to react, wherein pH value of a reaction system is 3-7; and after the reaction is finished, separating and recycling the magnetic composite adsorbent from the wastewater under the action of an applied magnetic field, so as to finish the removal of tetracycline in the wastewater. The method has the beneficial effects that the adsorption capacity is large, the adsorption speed is high, tetracycline in the wastewater can be powerfully removed, and the adsorbent is easily separated and recycled.

The invention relates to a method for removing heavy metallic salt ions in industrial wastewater by utilizing shells. The method adopts shell granular preparation with diameter of 2+/-0.3 mm, and preferably uses 1MH2SO4 for pretreatment in advance. The shell preparation has the best effect of adsorbing and removing Cu<2+> and Fe<3+>, and has a certain effect of adsorbing and removing Zn<2+> and Cd<2+> in mixed ion solution with Cu<2+>, Zn<2+>, Fe<3+> and Cd<2+> in industrial wastewater. The adsorption effect of the method to Fe<3+> can reach more than 99 percent, and the removing effect of the method to Cu<2+> and Zn<2+> can reach second-grade discharge standards for copper and zinc in China.

The invention relates to an adsorbent for removing sulfate ions contained in a water body as well as preparation and application thereof. The adsorbent is a poly (m-phenylenediamine) adsorbent obtained through chemical oxidation polymerization reaction at room temperature by taking m-phenylenediamine as a monomer and ammonium persulfate as an oxidant. The poly (m-phenylenediamine) adsorbent disclosed by the invention has the advantages of simple synthetic process, low cost, good removing effect on sulfate radicals contained in the water body, adsorption quantity reaching more than 107 mg.g<-1> and no secondary pollution; by means of the poly (m-phenylenediamine) adsorbent disclosed by the invention, the treatment effect on waste water with sulfate ion concentration lower than 500 mg.L<-1> can reach more than 95 percent, adsorption rate is high, and adsorption equilibrium can be achieved within 10 minutes; in addition, multiple adsorption results indicate that the desorption rate of poly (m-phenylenediamine) is about 95 percent, and the poly (m-phenylenediamine) can be effectively recycled.

The invention discloses a preparation method and application of an antibiotic composite adsorbent, aiming at the problem that a great amount of antibiotics exists in pharmaceutical wastewater. The preparation method of the antibiotic composite adsorbent comprises the following steps: mixing reproducible raw material, namely grapefruit peel and flesh with cheap natural mineral bentonite, and heating intensely in a tubular furnace insulated with air by adopting a high-temperature solid phase method; and then compounding a composite adsorbent by a saline solution impregnating method. Taking example for three most commonly seen antibiotics of oxytetracycline, tetracycline and amoxicillin, the prepared composite adsorbent has excellent adsorption effect. Compared with the prior art, the preparation method and the application have the advantages that the used raw material grapefruit peel and flesh are agricultural reproducible wastes; the raw material bentonite is low in price and is easily available; the preparation technology is simple, and can achieve industrial production so as to achieve the aim of reducing waste by waste.

The invention discloses a preparation method and an application of a graphene film composite activated aluminum oxide adsorbent adsorbing heavy metal ions and organic matter from waste water. The preparation method comprises the following steps: 1) taking activated aluminum oxide as a substrate, adding activated aluminum oxide into a polyvinyl alcohol organic solution to allow the surface of activated aluminum oxide to be rich in hydroxyl, putting in an oven at 20-50 DEG C for drying, obtaining the pretreated substrate for later use; 2) immersing the pretreated substrate in an alcohol solution containing a silane coupling agent with a volume concentration of 0.1-10%, taking out the substrate for drying, adding the substrate into an organic solution containing 0.1%-10 wt% of graphene, performing reaction for 1-10h at 50-100 DEG C, and obtaining the graphene film composite activated aluminum oxide adsorbent. Activated aluminum oxide is combined with the graphene; uncontrollability of a nanomaterial during subsequent treatment is avoided; a nano technology is creatively applied to the treatment of the heavy metal waste water, and the organic waste water that is high in toxicity, low in concentration and difficult to degrade; and adsorption rates are all above 97%.

The invention discloses a method for extracting potassium from sea water by using a continuous ion exchange method and relates to a method for treating the sea water by using an ion exchange method. The method comprises the following steps that a simulation moving table is arranged by using 36 continuous ion exchange devices consisting of ion exchange columns which are provided with jackets and filled with sodium type clinoptilolite; the simulation moving table is divided into an adsorption zone, an elution zone and a regeneration zone; the adsorption process is operated in the adsorption zone by layers and three layers are carried out in parallel; the concentration of potassium in the sea water as a raw material is 0.61-1.52g/L; the concentration of potassium in the drained sea water after adsorption is 0.01-0.15g/L; the elution process is operated in the elution zone by columns and three layers are carried out in series to obtain a potassium-rich solution and the concentration of K<+> in the potassium-rich solution is 36.00-44.12g/L; and the regeneration process is operated in the regeneration zone by columns and three layers are carried out in series to obtain ammonium-containing salt water. The adsorption, elution and regeneration processes are simultaneously and continuously operated, and thus the operation period is shortened, the efficiency is increased, the cost is reduced and economic benefits are improved.