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

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 to 98 percent.

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 relates to a method for separating and purifying oligo-xylose by using a simulated moving bed. The method comprises the following steps of: performing preprocessing such as decolorization, deinoning, condensation and the like on feed liquor obtained by performing enzyme hydrolysis on feed solution, namely hemicellulose; filtering and deoxidizing the preprocessed hemicellulose hydrolysis liquid with high purity water for later use; feeding the preprocessed hemicellulose hydrolysis liquid into a chromatographic separation device of the simulated moving bed to perform separation so as to obtain oligo-xylose crude liquor which is rich in oligo-xylose components; and performing reduced pressure evaporation concentration or excipient spray drying on the oligo-xylose crude liquor obtained by the separation to obtain oligo-xylose syrup or powder. In the method, the chromatographic separation device of the simulated moving bed (SMB) is used to extract the oligo-xylose, a plurality of adsorption posts is connected in series to form a closed loop, the positions of the inlet and outlet of each strand of materials are changed by continuously switching valves, and the relative movement of solid and liquid phases is realized, so that different components are separated and extracted. The method not only has the advantage of simple absorption operation of a fixed bed but also has the continuous operation capability of the moving bed, so that the method is suitable for large-scaled industrialized production.

The invention discloses a preparation method of a porous styrene thin film. The method comprises the following steps that (1) the styrene, a double bond containing comonomer, an initiating agent, a stabilizing agent and a cross-linking agent are added into a solvent prepared by absolute ethyl alcohol and deionized water; stirring is performed; the reaction is performed for 8 to 24h at the temperature of 70 to 80 DEG C; styrene copolymerized microspheres are obtained; (2) the prepared styrene copolymerized microspheres and polymers with opposite charges are mixed in an ethyl alcohol-water solvent; (3) a mixture is poured into a container; after the microspheres are settled, the solvent naturally evaporates; a polystyrene material is obtained; (4) the styrene obtained in the step (3), anhydrous ferric chloride and FDA (formaldehyde dimethyl acetal) are added into a 1,2-dichloroethane solvent; the polystyrene porous material is prepared. The preparation method has the advantages that thepreparation cost is greatly reduced; the adsorption capacity of carbon dioxide materials is improved; the chemical pollution of the materials in the preparation process is reduced; the porous materialof different sizes can be prepared; the industrial batch production and application is easy.

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 relates to a peeling device, which includes a movable film stripping plate and a film roll retracting mechanism that cooperates with the film stripping plate to peel the film. The film stripping plate is installed on a movable horizontal bearing plate. The horizontal bearing plate is connected with a servo drive device, the servo drive device is installed on a support plate, the support plate is fixedly installed on a support platform, and the film roll retracting mechanism is installed on the support plate. The present invention can realize the stripping operation through the movement of the above-mentioned stripping plate, and the position of the winding and unwinding mechanism does not change, and after stripping, the film is peeled off to facilitate the suction operation of the suction head mechanism.

The invention relates to a method for separating and purifying xylose and arabinose from hemicellulose acid hydrolysis liquid. The method comprises the following separating and purifying steps of: (1) carrying out electrodialysis and membrane filtration concentrate pretreatment on hemicellulose acid hydrolysis liquid directly obtained by adopting acid hydrolysis, deoxidizing and filtering for later use by adopting high-purity water; (2) putting the hemicellulose acid hydrolysis liquid after pretreatment into a simulated moving bed chromatography separating device and carrying out separation to obtain two discharging liquids; and (3) concentrating, cooling and crystallizing the two discharging liquids by adopting a multi-effect falling film evaporator to obtain xylose and arabinose products. In the invention, monosaccharide is extracted by adopting the simulated moving bed chromatography separation device (SSMB), a plurality of adsorption columns are serially connected into a closed loop, and inlet and outlet positions of all portions of materials can be changed by continuously switching valves, therefore, the relative motion between solid phase and liquid phase is realized, and the separation and the extraction among different components are carried out. The invention not only has the advantages of simple fixed bed adsorption operation, but also has the continuous operation capacity of a moving bed and is suitable for large-scale industrial production.

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.

The invention discloses a preparation method of a biological adsorbent for separating sodium cyclamate, which is characterized by comprising the following steps: pretreating alginate fibers by using ammonium carbonate and urea to obtain pretreated alginate fibers; then, using mercaptoacetic acid and sodium sulfide for carrying out surface modification on the pre-treated alginate fibers under the sulfuric acid condition to obtain surface-modified alginate fibers; finally, in a reactor, adding 85-88% of deionized water and 7-10% of silver nitrate in percentage by mass, stirring for dissolving, adding 4-6% of surface modified alginate fiber, regulating the pH value to 2-3 with dilute nitric acid, soaking at room temperature for 24 hours, carrying out solid-liquid separation, washing with deionized water, and drying to obtain the biological adsorbent for separating sodium cyclamate. The adsorbing material has the advantages of selective adsorption on sodium cyclamate, good mechanical property, good chemical stability, high adsorption speed, easiness in elution and regeneration capacity.

The invention discloses a preparation method of an anion exchange resin for sewage treatment. The preparation method comprises: adding water glass to formaldehyde in a dropwise manner under a stirring state, adjusting the pH value of the system, carrying out heating stirring, adding urea, carrying out heating stirring, adding melamine and cocoamidopropylbetaine, continuously stirring, adding water, carrying out mixing stirring, adding a copper sulfate solution in a dropwise manner, continuously stirring after completing the adding, adjusting the pH value of the system by using sodium hydroxide, adding an ascorbic acid solution, stirring, carrying out centrifugal separation, washing, and drying to obtain a first preform; feeding a macroporous chloromethylated polystyrene resin into N,N dimethylformamide, swelling, adding an alcohol amine compound and the first preform, carrying out heating stirring, cooling, and washing to obtain a second preform; adding thionyl chloride to the second preform in a dropwise manner in an ice water bath, heating, carrying out thermal insulation, cooling, washing, and filtering to obtain a third preform; and feeding the third preform into isobutanol, swelling, adding tri(octyl-decyl)amine, and carrying out a reaction to obtain the anion exchange resin for sewage treatment.