52results about How to "Adsorption conditions are mild" patented technology

The invention relates to a nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding SiO2 sphere flowers into mixed liquid of deionized water, absolute ethyl alcohol and ammonia water, and carrying out ultrasonic oscillation until the SiO2 sphere flowers are completely dispersed; and then adding a dopamine hydrochloride water solution, uniformly stirring at the room temperature, filtering, washing, drying, and processing at 700-900 DEG C for 2-4 hours in a N2 atmosphere so as to obtain nano-composite spheres; and finally impregnating the nano-composite spheres in hydrofluoric acid to remove the SiO2 sphere flowers, filtering, washing, and drying, so as to obtain the nitrogen-doped porous hollow carbon sphere CO2 adsorption material. The adsorption material is a porous hollow carbon sphere, the particle sizes of porous hollow nano-carbon spheres are about 400nm, the porous hollow nano-carbon spheres are uniform and regular, and the adsorption material has high nitrogen content, adsorptive property, specific surface area and pore volume and high-dispersed regular appearance, the surface of the adsorption material contains rich amino active sites, and the adsorption material can be applied to efficient adsorption of industrial CO2.

The invention discloses a method for removing thiophene sulfur in fuel oil by using Ag2O/SiO2 composite aerogel as an adsorbent, and belongs to the technical field of fuel oil processing. The method comprises the following steps: by taking tetramethyl orthosilicate, tetraethoxysilane, silica sol, sodium silicate and the like as silicon sources, and silver acetate, silver nitrate and the like as silver sources, preparing the Ag2O/SiO2 composite aerogel by adopting a sol gel-normal-pressure preparing drying method; quantitatively filling the aerogel into a fixed bed adsorption device, injecting model gasoline containing thiophene sulfur at certain temperature and air speed, collecting adsorbed model gasoline at the outlet in the lower end of a reaction device, and performing chromatographic analysis. The result shows that the Ag2O/SiO2 composite aerogel has a good adsorption property on thiophene sulfur. The Ag2O/SiO2 composite aerogel is simple in preparation method, low in cost, high in economic benefit, good in environment-friendliness, gentle in adsorption conditions and low in requirement on adsorption equipment, and can be repeatedly used.

The invention relates to a method for removing thiophene sulfides in fuel oil by taking SiO2-APTES hybrid aerogel as an adsorbent, and belongs to the technical field of fuel oil processing. Accordingto the method, methyl orthosilicate, tetraethoxysilane, silica sol, water glass and the like are taken as silicon sources, (3-aminopropyl)triethoxysilane and (3-aminopropyl)trimethoxysiloxane are taken as ammonia sources, the SiO2-APTES hybrid aerogel is prepared by a sol-gel atmospheric pressure drying method; a fixed bed adsorption device is filled with the SiO2-APTES hybrid aerogel, simulated gasoline containing the thiophene sulfides is injected at a certain temperature and airspeed, and the adsorbed simulated gasoline is collected for chromatographic analysis; results show that the SiO2-APTES hybrid aerogel has good adsorption property for the thiophene sulfides. The preparation method of the SiO2-APTES hybrid aerogel adsorbent is simple, and low in cost; the adsorbent can be repeatedly used, has high economic benefit, is environmentally friendly, has mild adsorption conditions and has low requirements on adsorption equipment.

The invention discloses a method of removing thiophene sulfides in fuel oil by taking an Ag2O/SiO2-ZrO2 compound aerogel as an adsorbent. The method comprises the following steps: filling a fixed bedadsorption device with the Ag2O/SiO2-ZrO2 compound aerogel as the adsorbent; introducing simulated gasoline containing thiophene sulfur at an air speed of 1-10h<-1> at 0-100 DEG C; and adsorbing the simulated gasoline to obtain simulated gasoline, the sulfur concentration of which is smaller than 1ppm. According to the Ag2O/SiO2-ZrO2 compound aerogel, Zr<4+> is introduced in a silicon framework structure of the aerogel to generate an acid L, lone pair electrons on an S atom of the thiophene compound are alkaline, the thiophene sulfides can be adsorbed to the centre of the acid L of the aerogelmatrix Ag2O/SiO2-ZrO2 through acid and alkali action, and the adsorption property of the aerogel on the thiophene sulfides can be further improved by means of pi complexation and acid and alkali action. The adsorption reaction is carried out at a constant pressure, the adsorption conditions are mild, the demand on adsorption equipment is low, and the method is convenient to operate. A good adsorption effect on the thiophene compounds is obtained.

The invention provides a method for continuous adsorption and removal of carbonyl sulfide and dimethyl disulfide in carbon 4 left after etherification reaction. The method includes the following steps that the carbon 4 left after etherification reaction is in contact with a carbonyl sulfur adsorbent to adsorb and remove the carbonyl sulfur in the carbon 4 left after etherification reaction; then the carbonyl sulfur adsorbent performing penetrating adsorption is subjected to regeneration treatment, and the operations of carbonyl sulfide removal and regeneration treatment are repeated; carbon 4 left after etherification reaction and without carbonyl sulfur is in contact with a dimethyl disulfide adsorbent to adsorb and remove the dimethyl disulfide in the carbon 4 left after etherification reaction; then the dimethyl disulfide adsorbent performing penetrating adsorption is subjected to regeneration treatment, and the operations of dimethyl disulfide removal and regeneration treatment are repeated. The method adopts the different adsorbents to adsorb and remove the carbonyl sulfur and the dimethyl disulfide in the carbon 4 left after etherification reaction and reduces the carbonyl sulfur content and the dimethyl disulfide content respectively to be below 1 mg/g, and the adsorbents can be regenerated and recycled.

The invention relates to a method using SiO2-CoO composite aerogel as the absorbent to remove thiophene sulfur in gasoline and belongs to the technical field of gasoline processing. The method includes: filling the SiO2-CoO composite aerogel into a fixed bed absorption device, and feeding simulated gasoline containing thiophene or benzothiophene under certain airspeed; collecting the absorbed simulated gasoline at the lower outlet of the reactor, and performing gas chromatography. The gas chromatography result shows that the SiO2-CoO composite aerogel can well absorb the thiophene and benzothiophene. The SiO2-CoO composite aerogel absorbent is simple to prepare, low in cost, reusable, convenient to operate, environmental friendly, high in economic benefit, mild in absorption condition and low in absorption equipment requirement.

The invention discloses a method for removing thiophenes sulfur in fuel oil by using SiO2/Cu2O composite aerogel as an adsorbent, and belongs to the technical field of fuel oil processing. The method is characterized by taking tetraethoxysilane as a silicon source and copper acetate as a copper source, and preparing the SiO2/Cu2O composite aerogel by adopting a sol gelation-ambient pressure drying method; then filling a stationary bed adsorption device with the SiO2/Cu2O composite aerogel; injecting simulated gasoline under certain temperature and certain flow. The simulated gasoline after being adsorbed can be collected at an outlet formed in the lower end of a reaction device, gas chromatography can be carried out, and a result shows that the SiO2/Cu2O composite aerogel has good adsorption performance on both thiophene and benzothiophene. A preparation method of a SiO2/Cu2O composite aerogel absorbent in the invention is simple, the cost is low, the SiO2/Cu2O composite aerogel absorbent can be repeatedly used for many times, and the economic benefit is high; adsorption conditions are gentle, and requirements on an adsorption device are low.

The present invention provides a novel hydroxide lanthanum-modified hydroxyapatite material and a preparation method and application thereof. The preparation method comprises the following steps of dissolving lanthanum chloride or lanthanum oxide into an acid solution, adding hydroxyapatite, and adjusting the pH (potential of hydrogen) value of the mixed solution to the alkaline property by an alkaline solution; putting the mixed solution after stirring into an ultrasonic device, and treating by ultrasonic waves for a period of time; putting onto a stirrer, and continuing to stir for a certainperiod of time; sealing, aging, filtering, and drying, so as to obtain filter slag; roasting at high temperature, so as to obtain the novel hydroxide lanthanum-modified hydroxyapatite material. The novel hydroxide lanthanum-modified hydroxyapatite material has the characteristics that the particle size is controllable, the specific surface area is large, the hole size of the particle is large, and the loading is uniform; the material is applied to remove the phosphate radicals in wastewater, the removal rate of phosphate radicals reaches 97.5% or above, and the purpose of high-efficiency andhigh-load phosphor removal is realized.

The invention discloses a preparation method of a pi complexing adsorbing agent used for separating saturated fatty acid methyl ester from unsaturated fatty acid methyl ester, which comprises the steps of: mixing Fe<2+> salt with Fe<3+> salt to prepare a Fe salt solution, and then undergoing a crosslinking reaction with chitosan to prepare a magnetic chitosan microsphere; and preparing a magnetic chitosan silver ion loaded adsorbing agent by using a dipping method to obtain the pi complexing adsorbing agent. Through tests, mixed fatty acid methyl ester is adsorbed and separated by adopting the magnetic chitosan loaded silver ion adsorbing agent, thus the iodine value of the mixed fatty acid methyl ester is improved to above 160. The preparation method is characterized in that silver ions are loaded by adopting a magnetic chitosan microsphere dipping method, and the prepared adsorbing agent has the advantages of high efficiency of separating the saturated fatty acid methyl ester from the unsaturated fatty acid methyl ester, less fuel consumption, compact structure of a device, investment saving and safety in operation.

The invention discloses a method for removing thiophene sulfur in fuel oil and belongs to the technical field of fuel oil processing. The method comprises the following steps: using tetramethyl orthosilicate, tetraethyl orthosilicate, silica sol, water glass or the like as a silicon source; using silver acetate, silver nitrate or the like as a silver source; using aluminum nitrate, aluminum acetate or aluminum oxalate as an aluminum source; preparing an Ag2O/SiO2-Al2O3 composite aerogel with a sol-gel-atmospheric pressure drying method; quantitatively filling in a fixed bed adsorption device;injecting a simulated gasoline containing thiophene sulfur at a certain temperature and space velocity; and collecting the adsorbed simulated gasoline at a lower outlet of a reaction device for chromatographic analysis. Results show that the Ag2O/SiO2-Al2O3 composite aerogel has good adsorption performance for thiophene sulfur; an Ag2O/SiO2-Al2O3 composite aerogel adsorbent in the invention is simple in preparation method, low in cost, capable of being repeatedly used, high in economic efficiency, environmentally friendly, mild in adsorption condition and low in requirement on adsorption equipment.

The invention relates to a method for removing thiophenic sulfur in fuel oil by using an Ag2O/SiO2-graphene oxide composite aerogel as an adsorbent, and belongs to the technical field of fuel oil processing. According to the method, methyl orthosilicate, tetraethyl orthosilicate, silica sol, water glass and the like are used as a silicon source, silver acetate, silver nitrate and the like are usedas a silver source, and the Ag2O/SiO2-graphene oxide composite aerogel is obtained by a sol-gel-normal pressure drying method. The Ag2O/SiO2-graphene oxide composite aerogel is quantitatively filledin a fixed bed adsorption device, simulated gasoline containing the thiophenic sulfur is injected into the adsorbed simulated gasoline at a certain temperature and space velocity into the fixed bed adsorption device, and the adsorbed simulated gasoline is collected at the lower end outlet of the device for chromatographic analysis. Results show that the Ag2O/SiO2-graphene oxide composite aerogel has good adsorption properties for the thiophenic sulfur. The preparation method of the Ag2O/SiO2-graphene oxide composite aerogel adsorben is simple and low in cost, and the adsorbent can be repeatedly used, has high economic efficiency, is environmentally friendly, and has mild adsorption conditions and low requirements on adsorption equipment.

The invention relates to a method for removing thiophene sulfur from fuel oil by Ag2O/SiO2-Al2O3-graphene oxide composite aerogel and belongs to the technical field of fuel oil processing. The methodis characterized in that the Ag2O/SiO2-Al2O3-graphene oxide composite aerogel is prepared by taking silicon orthosilicate, tetraethyl orthosilicate, silica sol, water glass and the like as silicon sources, taking silver acetate, silver nitrate and the like as silver sources and taking aluminum nitrate, aluminum acetate and aluminum oxalate as aluminum sources and adopting a sol-gel and atmosphericpressure drying method. The Ag2O/SiO2-Al2O3-graphene oxide composite aerogel is quantitatively packed in a fixed bed adsorption device, simulated gasoline containing the thiophene sulfur is injectedat a certain temperature and airspeed, and the simulated gasoline after absorption is collected at an outlet in the lower end of a reaction device for chromatographic analysis. Results show that the Ag2O/SiO2-Al2O3-graphene oxide composite aerogel has good adsorption properties for the thiophene sulfur. The Ag2O/SiO2-Al2O3-graphene oxide composite aerogel absorbent in the method provided by the invention is simple in preparation method, low in cost, capable of reuse for many times, high in economic benefits, environmentally friendly, mild in absorption conditions and low in requirements for absorption equipment.

The invention belongs to the technical field of composite materials, relates to the preparation of modifier biomass charcoal, and specifically relates to a preparation method of a copper-aluminum bimetal oxide modified bamboo charcoal fiber composite material. The method comprises: immersing crushed bamboo leaves in a sodium hydroxide solution to remove impurities, adding acetic acid acidified sodium hypochlorite, and obtaining white fiber; preparing aluminum nitrate solution, conducting filtration and drying after immersing the white fiber, and performing calcination in nitrogen; and dissolving copper nitrate, Al2O3/BF and hexamethylenetetramine in deionized water according to a solid-to-liquid ratio of 0.1-1.5 g : 0.1-0.9 g : 0.05-1.0 g : 50-200 mL, conducting stirring, hydrothermal reaction at 60-150 DEG C for 6-12 hours, filtration and washing, and then performing calcination at 250-600 DEG C for 2-8 hours after drying to obtain the composite material. According to the present invention, Cu-Al/BF is applied to remove ammonia nitrogen pollutants in water bodies. In the invention, bamboo leaf biomass resources are utilized to prepare Cu-Al/BF through hydrothermal and calcination,the ammonia nitrogen in the water bodies is effectively removed at room temperature, the material can be recycled, the preparation cost is minimized, and the adsorption performance is improved.

The invention discloses a method of removing thiophene sulfides in fuel oil by adsorption of composite of Cu2O/SiO2-Al2O3-GO and aerogel. Composite of Cu2O/SiO2-Al2O3-graphene oxide and aerogel is used as an adsorbent herein to fill a fixed-bed adsorbing device; simulation gasoline with thiophene sulfides is introduced under 0-100 DEG C at the air velocity of 1-10 h<-1>; simulation gasoline with asulfur concentration of 1 ppm and below is attained by adsorption. The composite of Cu2O/SiO2-Al2O3-graphene oxide and aerogel is utilized herein; Al3+ is introduced in aerogel silicon framework structure to generate L acid; lone-pair electrons on S atoms of the thiophene sulfides are of basicity, and the center of the L acid in aerogel substrate SiO2-Al2O3 can adsorb the thiophene compounds under acidic and basic action; synergy of pi complexing action and acidic-basic action helps further improve the adsorption of thiophene compounds; adsorbing effect is improved, and the sulfur concentration of the thiophene sulfides in the simulation gasoline may reach 1 ppm and below.

The invention relates to the technical field of sewage treatment, and in particular, relates to a preparation method of a bacterial cellulose LDH composite adsorption material, wherein the preparationmethod comprises a synthesis step and a combination step. In the synthesis step, an aluminum salt solution and a magnesium salt solution are dropwise added into a bacterial cellulose dispersion liquid, a coprecipitator is used for in-situ synthesis of layered double hydroxides on the surface of bacterial cellulose, and the mixture is made into a mixed solution. In the combination step, a catalystand a binding reagent are added into the mixed solution, and a product is obtained after a catalytic reaction. The bacterial cellulose/LDH composite adsorption material prepared by the preparation method has an electrostatic attraction effect, an ion exchange effect, a chelating effect, a physical adsorption effect and the like on heavy metal ions in a polluted water body, overcomes the defect ofa single bacterial cellulose adsorption mode, improves the adsorption effect, and can solve the technical problem that a layered double hydroxide material is unstable in an acidic water environment.