50results about How to "Easy to clean and regenerate" patented technology

The invention discloses a preparation method of a polymeric membrane, in particular to a preparation method of a porous silicon carbide slab ceramic membrane. The method comprises the following stepsof preparation of a supporting body, membrane layer coating and membrane layer sintering. Porous silicon carbide slab ceramic sheets are spaced by using T-shaped fireproof materials, the spacing rangeis within 5-20 mm, the situation is avoided that the sheets are in contact and accordingly the coated membrane layer is damaged, and the porous silicon carbide slab ceramic membrane is obtained through sintering under an air atmosphere. The preparation method has the advantages of being good in pollution resistance, easy to clean and recycle, long in service life, good in chemical stability, goodin mechanical strength and the like. The problems can be effectively solved that an organic hollow fiber membrane and an organic slab membrane are short in service life, low in mechanical strength, poor in oxidation resistance and are easily subjected to acid-base corrosion in the engineering application process. The porous silicon carbide slab ceramic membrane is particularly suitable for the fields such as chemical industry wastewater and landfill leachate and is a separation material which has the best development prospect.

The invention provides an extraction method of lincomycin. The extraction method mainly comprises the following steps: adjusting acidity of fermentation liquor, filtering by using a ceramic ultrafiltration membrane, then adjusting alkalinity, then filtering by using a ceramic ultrafiltration membrane again, then carrying out primary sec-octyl alcohol extraction and hydrochloric acid back-extraction, adjusting alkalinity of the primary back extraction liquor and then filtering by using a ceramic ultrafiltration membrane again; carrying out secondary sec-octyl alcohol extraction and hydrochloric acid back-extraction and adding acetone to the secondary back extraction liquor to carry out evaporative crystallization. According to the extraction method provided by the invention, the yield of the lincomycin is high, the color grade of the lincomycin can be improved, and the B component content in the lincomycin is reduced. According to the extraction method of the lincomycin, the feed liquid quality of other extraction technologies can be improved by a membrane treatment process, the integral extraction efficiency is further improved, the residual volume of sec-octyl in raffinate in the extraction procedure is reduced, the product quality is improved, and meanwhile, the COD (Chemical Oxygen Demand) in produced wastewater is reduced. The extraction method has certain economic benefit and environmental benefit.

The invention relates to the field of analysis, in particular to a method for purifying EPA (eicosapentaenoic acid) from fish oil. The method has high selectivity and separation efficiency, EPA, DHA and other impurities can be effectively separated, unsaturated fatty acid and impurities in the fish oil are selectively adsorbed, sample loads are high, a moving phase of an organic solvent or organicsolvent/water system is used, the solvent can be recycled, and industrialization cost is reduced.

The invention relates to an asymmetrical polyvinyl chloride dry-wet reversible ultrafiltration/microfiltration membrane, a preparation method and application thereof, which belong to the field of polymer microporous membranes. The asymmetrical polyvinyl chloride dry-wet reversible ultrafiltration/microfiltration membrane is prepared by the following steps of: striking membrane casting liquid which is prepared from polyvinyl chloride (PVC) serving as a major raw material on a carrier substrate so as to obtain an initial liquid producing membrane; gelling in coagulating liquid consisting of a mixed solvent; washing with water and soaking; and drying so as to obtain a finished membrane. The PVC ultrafiltration/microfiltration membrane prepared by a method has a finger-shaped structure on the surface, highly asymmetrical spongy porous structures on a mold stripping side and inside the membrane, has reversible dryness and wetness membrane performance and high stain resistance, is blocked difficultly, is easy to clean and regenerate, has a pore diameter which is adjustable between 0.01 and 1.0 mu m, is suitable for precision filtration, recycled water treatment, R0 pre-cartridge filtration, terminal precision filtration, tapped water direct drinking filtration, sewage treatment and liquid purification and filtration.

A process for treating sewage and the mixture of sewage and sludge includes such steps as coating a layer of non-metal ore particles or colloid particles on the porous carrier pipe by cross-flow micro-filtering, an cross-flow filtering of said sewage or the mixture of sewage and sludge. Said porous carrier pipe can be easily regenerated by flushing with high-speed water and coating again.

The invention relates to a city tap water supplying and cleaning device and in particular relates to a water-supply pipeline filtering device. The water-supply pipeline filtering device comprises a connecting barrel with flange plates at two ends, wherein the pipe diameter of the middle part of the connecting barrel is greater than the pipe diameters of two ends of the connecting barrel, a tubular filter screen is arranged in the connecting barrel, one end of the filter screen is fixedly connected with the water inlet end of the connecting barrel, a sheet-like water guide valve is arranged in the filter screen, the water guide valve is the same as the cross section of the inner pore of the filter screen in shape, the water guide valve is connected to a handle on the outer wall of the connecting barrel by a valve rod, the other end of the filter screen is closed, a blow-off pipe introduced into the filter screen is arranged at the closed end of the filter screen, the other end of the blow-off pipe is arranged outside the connecting barrel and is sealed by a cover, a pressure spring is arranged between the closed end of the filter screen and the water guide valve, and the outer diameter of the pressure spring pushes against the inner wall of the filter screen. According to the water-supply pipeline filtering device, tap water can be filtered, and the filtering device can be cleaned and regenerated well.

The invention discloses a chromatographic medium and a preparation method thereof. The chromatographic medium comprises a chromatographic substrate and a functional ligand; the chromatographic substrate is agarose gel microspheres; the functional ligand is coupled N-benzyl-N-methylethanolamine activated via allyl glycidyl ether. The preparation method includes the steps of 1) activating the chromatographic substrate with allyl glycidyl ether to obtain an activated chromatographic substrate; 2) brominating the activated chromatographic substrate of step 1) via bromine water to form a brominatedchromatographic substrate; 3) subjecting the brominated chromatographic substrate of step 2) to reaction with the functional ligand N-benzyl-N-methylethanolamine to form the chromatographic medium. The preparation process of the chromatographic medium is simple; antibody adsorbing capacity is high; exfoliated protein A can be well removed by changing pH at the premise of achieving antibody adsorbing and desorbing, the protein A can be used to capture and purify the medium, and two-step purification of an antibody is achieved.

The invention relates to hydrophobic charge-induction chromatography media with double functional groups. The hydrophobic charge-induction chromatography media comprise a chromatography substrate andligands, wherein the chromatography substrate is hydrophilic porous microspheres with hydroxy groups, and the ligands are difunctional ligands formed after reaction of carboxyl groups of pyrrole-3-carboxylic acid and amino groups of 4-amino-2-carbonyl pyrimidine. According to the novel hydrophobic charge-induction chromatography media prepared from the difunctional ligands formed by pyrrole-3-carboxylic acid and 4-amino-2-carbonyl pyrimidine, the concept of the double functional groups is introduced, spatial arrangement of the ligands is optimized, antibody fixation selectivity is improved, and the hydrophobic charge-induction chromatography media have specific separation performance accordingly.

The invention relates to a combined ligand, a combined bionic chromatography medium and a preparation method and application thereof. The combined bionic chromatography medium uses hydrophilic porousmicrospheres as chromatography matrix, is activated by allyl bromide, is brominated and alcoholized by N-bromosuccinimide, and then is coupled with the combined ligand. The sequence of the combined ligand is phenylalanine-tyrosine-glutamic acid-5-aminobenzimidazole. The combined bionic chromatography medium has two functional groups including phenylalanine-tyrosine-glutamic acid tripeptide and aminobenzimidazole, introduces a hydrophobicity charge-inducing ligand while retaining the high selectivity characteristic of a polypeptide ligand to an antibody, makes elution conditions milder, and achieves effective antibody isolation.

The invention discloses a magnetorheological fluid recovery device and a treatment method based on ionization and centrifugation, and belongs to the technical field of magnetic waste liquid recovery and treatment. The device includes an outer barrel, an inner barrel, an adsorption tube, and a filter screen. The inner barrel is rotatably mounted in the outer barrel through a bearing and driven by a motor. The sidewall of the inner barrel is provided with filter holes that communicate with the inside and the outside, and the adsorption tube is arranged in the inner barrel. In the middle of the body, a coil is arranged in the adsorption tube, an electrode plate is arranged in the inner barrel, a filter screen is arranged on the inner side wall of the inner barrel and covers the filter hole, and a recovery stop valve is arranged on the outer wall of the outer barrel. The method of the invention realizes the separation and recovery treatment of the magnetorheological fluid through ionization treatment, centrifugal breaking treatment and centrifugal separation treatment. The present invention processes the magnetorheological fluid, separates and recovers the main dispersed particles and the carrier liquid, does not need any treatment agent for preliminary treatment in the early stage, and has high recovery efficiency, and the recovered carrier liquid can be used as a new carrier liquid after a little treatment.

The invention relates to a hydrophobic charge-induced chromatographic medium with bi-functional groups. The hydrophobic charge-induced chromatographic medium with the bi-functional groups comprises achromatographic matrix and ligands, wherein the chromatographic matrix is made of hydrophilic porous microspheres with hydroxyl groups; the ligands are bifunctional ligands formed after a reaction ofcarboxyl groups of histidine and amino groups of 2-aminobenzothiazole. The novel hydrophobic charge-induced chromatographic medium is prepared by using the histidine and the 2-aminobenzothiazole as the bifunctional ligands, so that the advantages of the conventional hydrophobic charge-induced chromatographic medium are retained; through the introduction of a concept of the bifunctional groups, thespatial arrangement of the ligands is optimized and the antibody bonding selectivity is improved. Therefore, the hydrophobic charge-induced chromatographic medium with the bifunctional groups has a unique separation property.

A process based on two-stage membrane filter technique for preparing the nanofiltered water able to be directly drunk includes such steps as microfiltering the running water to obtain microfiltered water and the concentrated water to be recovered, nanofiltering to obtain nanofiltered water and the concentrated water to be recovered, decoloring and deodoring by chromatographic column to obtain the target water, and collecting said two kinds of concentrated water.

The invention discloses a novel method for preparing magnetic microspheres and separating an antibody of the magnetic microspheres. The novel method comprises the specific steps that 1, a magnetic microsphere substrate is prepared; 2, the magnetic microsphere substrate is activated; 3, functional ligands are coupled; 4, the microspheres are added into monoclonal antibody cell sap and are mixed with and absorb an antibody through oscillation; 5, a magnet is used for attracting the microspheres on the outer wall of a triangular flask, the cell sap is poured out, and flushing is performed by using an equilibration buffer solution; 6, a de-absorption buffer solution is added, full oscillation is performed, the microspheres are attracted from the outer wall of the triangular flask by using the magnet, and the de-absorption buffer solution containing a product is collected. The novel magnetic microspheres prepared by means of the method and having hydrophobic charge inductive effect integrate the hydrophobic charge inductive effect and magnetic response, have the advantages of being high in protein carrying capacity, moderate in de-absorption condition, simple and convenient to separate and the like and can be used for direct and efficient separation of the antibody from feed liquid containing solid impurities.