37results about How to "Simple adsorption operation" patented technology

The invention discloses a method for preparing a composite membrane with the function of absorbing and separating heavy metal ions. Firstly, a nylon 6 nanofiber membrane is prepared by using an electrospinning method; secondly, hyperbranched polyamidoamine is adsorbed to the nylon 6 fiber by physical action. Surface; finally, the hyperbranched polyamidoamine is cross-linked by chemical reaction to form a tubular film, which is firmly attached to the surface of the nylon 6 fiber. The invention fully utilizes the characteristics of large specific surface area and high porosity of the nylon 6 electrospinning membrane and the characteristic of strong adsorption capacity of hyperbranched polyamidoamine to heavy metal ions. The preparation process of the material of the invention is simple, the structure is novel, and the adsorption capacity is strong.

The invention provides a nitrogenous NaY type molecular sieve composite adsorption material, a preparation method and application. The preparation method of the material comprises the steps of carrying out a polymerization reaction on aniline on a NaY type molecular sieve under the action of a crosslinking agent to obtain solid granules, and washing and drying the solid granules to obtain the nitrogenous NaY type molecular sieve composite adsorption material. The invention further provides the nitrogenous NaY type molecular sieve composite adsorption material prepared by the method and an application thereof. The preparation method of the nitrogenous NaY type molecular sieve composite adsorption material is free of high temperature calcination, low in energy consumption and simple in steps, and the aniline is polymerized on the NaY type molecular sieve, so that the amino density is high. The CO2 adsorption ability of the nitrogenous NaY type molecular sieve composite adsorption material provided by the invention is strong, when a gas contains low-concentration CO2 under normal temperature and normal pressure, the CO2 adsorption rate of the nitrogenous NaY type molecular sieve composite adsorption material provided by the invention is quite high, the adsorption operation is simple and easy, and the treatment cost is low.

The present invention discloses a preparation method of a porous ceramic surface perfluorooctane sulfonic acid molecularly imprinted adsorbent. According to the preparation method, waste ceramic is used as the supporting body of an adsorbent, and perfluorooctane sulfonic acid is used as a template molecule; 58-65% by mass of N,N-dimethylformamide, 15-20% by mass of succinimide, 1.0-3.0% by mass of perfluorooctane sulfonic acid, 12-18% by mass of aminated porous ceramic powder, and 1.0-4.0% by mass of ammonium persulfate are added to a reactor, a stirring reaction is performed for 6 h at a temperature of 75+ / -2 DEG C in the absence of oxygen, the obtained product is subjected to stirring washing for 12 h with the mixed solution of ethanol and sodium hydroxide, the template molecule is removed, and drying is performed to obtain the porous ceramic surface perfluorooctane sulfonic acid molecularly imprinted adsorbent. According to the present invention, the porous ceramic surface perfluorooctane sulfonic acid molecularly imprinted adsorbent can specifically recognize perfluorooctane sulfonic acid, and has advantages of high selectivity, good mechanical property, good chemical stability, fast adsorption, easy elution, and regenerative capacity.

The invention discloses a preparation method of a palm tree bark surface naringin molecularly imprinted adsorbent material. The preparation method comprises carrying out surface modification on oxidized palm tree bark through gamma-methacryloxypropyltrimethoxysilane to obtain surface-modified palm tree bark, adding 50 to 60% by mass of ethanol, 8 to 14% by mass of dipentaerythritol triacrylate, 4 to 8% by mass of itaconic acid, 4.0 to 8% by mass of naringin, 12 to 20% by mass of the surface-modified palm tree bark and 1.0 to 3.0% by mass of azobisisoheptonitrile into a reactor, carrying out stirring without oxygen for a reaction, removing the template molecules through a mixture of methanol and acetic acid and carrying out drying to obtain the palm tree bark surface naringin molecularly imprinted adsorbent material. The adsorbent material has a specific recognition capability to naringin, high selectivity, good mechanical properties, good chemical stability and a fast adsorption speed, is easy to elute and is biodegradable. The preparation method has simple processes, has a regeneration capability and has environmental friendliness.

The invention belongs to the technical field of electricity, and particularly relates to nano-modified transformer oil and a preparation method thereof. The transformer oil is prepared from 0.15 to 0.8% of modified aluminium nitride nano-particles and 0.2 to 1.0% of modified alpha-Al2O3 nano-particles in percentage by weight. The nano-modified transformer oil is prepared by the following steps: adding aluminium nitride nano-particles and a silane coupling agent into an organic solvent to carry out sonic oscillation for 1 to 2h, then adding methyl methacrylate, carrying out water bath reaction at 60 to 80 DEG C for 10 to 12h, ball-milling, carrying out rotary evaporation for removing the organic solvent, drying, obtaining powder, then carrying out Soxhlet extraction with methylbenzene, and then carrying out devolatilization, thus obtaining the modified aluminium nitride nano-particles; modifying alpha-Al2O3 nano-particles with a sodium laurate solution to obtain the modified alpha-Al2O3 nano-particles; adding the modified nano-particles into base oil, then adding a molecular sieve for adsorption, and filtering. The nano-modified transformer oil prepared by the method has excellent heat-conducting property and electrical performance.

The invention discloses a surface artemisinin molecule imprinting adsorbing material of a vegetable sponge. The material is characterized characterized by being prepared by the following steps of: preparing a polymer by selecting vegetable sponge as a substrate material, taking artemisinin as a template molecule, taking itaconic acid and acrylamide as functional monomers, taking ethylene glycol dimethacrylate as a cross-linking agent, taking azodiisobutyronitrile as an initiator and taking N,N-dimethylformamide as a solvent; and removing the artemisinin by using a hexane-diethyl ether mixed solution. The invention further provides a preparation method and an application method of the surface artemisinin molecule imprinting adsorbing material of the vegetable sponge. The surface artemisinin molecule imprinting adsorbing material of the vegetable sponge can separate the artemisinin with a structural analogue under normal pressure and temperature conditions; and the surface artemisinin molecule molecular imprinting adsorbing material of the vegetable sponge has the advantages of specificity, selectivity, good mechanical performance, good chemical stability, fast adsorbing speed, easiness for being eluted, biodegradability, simple process, regeneration capability, environmental friendliness and the like.

The invention discloses a preparation method of a loofah sponge surface melamine molecule imprinting adsorbing material and application of melamine in detecting food. In the method, natural loofah sponge which belongs to natural high molecular material is used as a support body, and melamine molecule imprinting polymers are modified on the surface of the support body. The preparation method comprises the following steps of: adding alkalized loofah sponge, melamine, methacrylic acid, ethylene glycol dimethacrylate and azodiisobutyronitrile in a certain proportion; removing oxygen with argon inan alcohol medium; reacting for 20-30 hours in a constant temperature water bath at 55-65 DEG C, filtering and washing; carrying out Soxhlet extraction for 18-30 hours with a 10-15 percent (by volumefraction) acetic acid-methanol solution to remove template melamine molecules; and washing and drying to obtain the adsorbing material. The adsorbing material has the advantages of specific identification ability to the melamine, high selectivity, high adsorbing speed, good desorption property, biodegradation, regeneration capacity, and the like, and the maximum adsorption capacity is 126mg / g.

The invention discloses a preparation method of a loofah sponge surface lead ion imprinted absorbing material and the use of the loofah sponge surface lead ion imprinted absorbing material in metal ion absorption and belongs to natural high polymer material modification. In the method, the loofah sponge natural high polymer material is used as a support, and the surface of the material is modified with a lead ion imprinted polymer. The main technical characteristics of the method include: adding acylated loofah sponge, lead-dithizone complex, 4-vinylpyridine, ethylene dimethacrylate and azodiisobutyronitrile into a chloroform medium, removing oxygen by argon in a certain proportion; introducing argon to expel oxygen; reacting in a water bath at a constant temperature of 50 to 70 DEG C, filtering and washing; and performing Soxhlet extraction by using 0.10mol / L solution of HNO3 for 12 hours, removing template lead ions, washing, drying and obtaining the material. The material has specific lead ion identification capacity, high selectivity, high absorption speed and high desorption capacity, is widely available and biodegradable, can be prepared by a simple process and has regeneration capacity and the advantages of environmental friendliness and the like.

The invention discloses a double metal loaded sodium alginate / carboxymethylcellulose double-functional microballoon adsorbing material and a preparation method thereof. The method comprises the following steps: dissolving sodium alginate and carboxymethylcellulose at a mass ratio of (5-20) to 1 in deionized water, and stirring so as to obtain 1-3wt% compound colloidal sol; electronically spraying the compound colloidal sol into a receiving device containing a 1-20wt% metal ion solution by using an electronic spraying device, stirring, and filtering to obtain metal ion doped gel microballoons; and leaching the gel microballoons, then soaking the leached gel microballoons in a 5-25wt% aluminium chloride solution, stirring to obtain a mixture, adding 0.1-3 parts by volume of a cross-linking agent into the mixture, stirring, filtering, leaching and stoving so as to obtain the double metal loaded sodium alginate / carboxymethylcellulose double-functional microballoon adsorbing material. The preparation method has the characteristics of being simple, low in cost, environmentally friendly, and the like; the material prepared by adopting the method disclosed by the invention has the good application prospect in the aspects of water treatment and the like in fields of chemical engineering, agriculture, environment protection and the like.

The invention discloses a 'mercapto-gold' modified silica-gel surface sudan molecularly imprinted material as well as a preparation method and application thereof. The preparation method comprises the following steps: performing surface modification on silica gel, so that the silica-gel surface contains mercapto groups; performing coordination bonding on gold nanoparticles and the mercapto groups so as to connect the gold nanoparticles and silica gel through the mercapto groups, consequently, forming 'mercapto-gold' @silica gel; taking sudan as a template molecule, adding the 'mercapto-gold' @silica gel, a cross-linking agent, an initiator and a pore-foaming agent for carrying out a polymerization reaction, and removing the template molecule, so as to obtain the 'mercapto-gold' modified silica-gel surface sudan molecularly imprinted material. The material prepared by the method has adsorptivity on the sudan molecule, and also has the advantages of high selectivity, specific recognition ability and the like.

The invention discloses an arsenic removal material prepared through active-carbon-loaded organism, relates a preparation method of the active-carbon-loaded biological materials, and aims at solving the problems that the existing artificially synthesized arsenic removal adsorbing material is high in preparation cost, and the existing natural arsenic removal adsorbing material is low in absorbing capacity and poor in arsenic removal effect. The arsenic removal material prepared through active-carbon-loaded organism is prepared by loading a compound type bioflocculant on the surface of a coaly amorphous active carbon particle. The method comprises the following steps: (1) preparing bioflocculant agent dispersion liquid; (2) adjusting the PH value of the biofocculant agent dispersion liquid to be 7.5-8.0; (3) adding coaly amorphous active carbon particles for loading; and (4) separating, washing and drying in sequence so as to obtain the arsenic removal material prepared through active-carbon-loaded organism. The method is mainly used for preparing the arsenic removal material prepared through active-carbon-loaded organism.

The invention discloses a preparation method of a retinervus luffae fructus surface procyanidin molecular imprinting adsorption material. The preparation method comprises: carrying out surface modification on retinervus luffae fructus by using gamma-glycidoxypropyltrimethoxysilane to obtain surface modified retinervus luffae fructus; respectively adding 52-62% of ethanol, 10-15% of ethylene dimethacrylate, 6-10% of N-vinylpyrrolidone, 4.0-8.0% of procyanidin, 10-15% of the surface modified retinervus luffae fructus, and 1.0-3.0% of azobisisobutyronitrile to a reactor; and carrying out stirring dissolving, carrying out a stirring reaction for h in the absence of oxygen, and removing the template molecule from the obtained product by using a methanol and acetic acid mixed solution so as to obtain the retinervus luffae fructus surface procyanidin molecular imprinting adsorption material. According to the present invention, the retinervus luffae fructus surface procyanidin molecular imprinting adsorption material can specifically recognize procyanidin, and further has advantages of high selectivity, good chemical stability, fast adsorption, easy elution, biodegradability, simple process, regenerative ability, environmental protection, and the like.

The invention discloses a heavy metal biological adsorbent using an eggshell membrane as a matrix and a preparation method thereof. The heavy metal biological adsorbent adopts chitosan as an immobilized carrier and eggshell membrane powder as a basis material, and comprises the following components in part by weight: 10 to 13 parts of the eggshell membrane powder, 20 to 30 parts of the chitosan of which the deacetylation degree is 86.9 percent, and a minute amount of gelatinous substance of a complex which contains sodium and potassium and is formed in the preparation process. The particle size of the biological adsorbent is 2 to 3 millimeters. The method comprises the steps of performing vacuum freeze drying and mechanical disintegration on a fresh eggshell membrane (a fibrous membrane between an eggshell and egg white), and then embedding the eggshell membrane with chitosan glue solution to obtain the biological adsorbent for adsorbing heavy metals. The biological adsorbent can be used for treating waste water containing the heavy metals of nickel, cobalt, cadmium, copper, lead and the like of which the concentration is lower than 100 mg / L, and the adsorption rate achieves 42 to98 percent.

The invention discloses a method for preparing sulfamethoxazole modified aluminum silicate fiber adsorbents. The method is characterized by comprising steps of carrying out surface chlorination on aluminum silicate fibers by 3-gamma-chloropropyl trimethoxysilane to obtain chlorinated aluminum silicate fibers; adding, by weight, 78-82% of diluted hydrochloric acid and 2-5% of sulfamethoxazole intoa reactor, stirring and dissolving the diluted hydrochloric acid and the sulfamethoxazole, adding, by weight, 14-18% of chlorinated aluminum silicate fibers and 0.2-1.0% of zinc sheets into the reactor, heating the reactor until the temperature of the reactor reaches 40+ / -2 DEG C, keeping the temperature of the reactor constant, carrying out stirring reaction for 3 h, separating solid from liquidafter the reaction is completely carried out and carrying out washing by the aid of deionized water, and carrying out drying to obtain the sulfamethoxazole modified aluminum silicate fiber adsorbents.The aluminum silicate fibers are used as frameworks of the sulfamethoxazole modified aluminum silicate fiber adsorbents. The sum of the percentages of components added into the reactor is one hundredpercent. The method has the advantages that perfluorooctanoic acid can be selectively adsorbed by the sulfamethoxazole modified aluminum silicate fiber adsorbents which are adsorption materials, andthe adsorption materials are excellent in mechanical performance, good in chemical stability, high in adsorption rate and easy to elute and have regeneration capacity.

The invention discloses a preparation method of a porous ceramic surface perfluorooctanoic acid molecular imprinting adsorbent. The preparation method is characterized in that porous ceramic powder is used as a support of an adsorbent. The preparation method comprises adding 53 to 60% by mass of deionized water, 10 to 15% by mass of maleimide, 13 to 18% by mass of itaconic acid, 1.0 to 2.0% by mass of perfluorooctanoic acid, 10 to 15% by mass of epoxidized porous ceramic powder and 1.0 to 3.0% by mass of ammonium persulfate into a reactor, feeding nitrogen gas for 10min to remove oxygen, stirring the materials in an oxygen-free atmosphere at a temperature of 45+ / -2 DEG C for 12h, stirring to wash the product through a mixed solution of ethanol and sodium hydroxide for 10h so that a template molecule is removed and carrying out drying to obtain the porous ceramic surface perfluorooctanoic acid molecular imprinting adsorbent. The adsorbent has ability to specifically recognize perfluorooctanoic acid, has good selectivity and good mechanical properties, has good chemical stability and a fast adsorption speed, is easy to elute and has a regenerative capacity.