31results about How to "Improved mass transfer resistance" patented technology

The invention discloses a magnetic enzyme nanogel biocatalytic particle and a preparation method thereof. The magnetic enzyme nanogel biocatalytic particle is of a core-shell structure, the core of the magnetic enzyme nanogel biocatalytic particle is a magnetic nanoparticle with enzyme molecules adsorbed on the surface, and the enzyme molecules react with the magnetic nanoparticle through electrostatic force; the shell is a crosslinked high-polymer material layer; and the core is connected with the shell through a chemical bond. The preparation method is as follows: an amino group, a carbon-carbon double bond, a carboxyl group and other groups are first introduced into the surface of the magnetic nanoparticle by way of chemical modification, enzyme-particle nanoscale composite material is then obtained by regulating the pH of solution, and finally, with a vinyl monomer as material, the magnetic enzyme nanogel biocatalytic particle is obtained by way of free radical polymerization. The method is characterized in that: the method is simple and mild, purification is convenient, and industrial scale-up is easy to implement. The magnetic enzyme nanogel biocatalytic particle has the characteristics of high biocatalytic activity and high thermal stability, is convenient to recycle, and has a broad application prospect in organic synthesis, the food industry, the detergent industry, the energy industry, biomedicine, sensors and other fields.

The invention relates to a stable gas membrane used for removing, recovering, and gathering ammonia or organic amine from dosage liquor or wastewater. The gas membrane comprises a membrane shell, hollow fibrous membranes (A) and hollow fibrous membranes (B). A cavity is provided in the middle of the membrane shell. An inlet and an outlet are respectively arranged on each of the two ends of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are positioned in the cavity of the membrane shell. A shell pass outlet communicating with the atmosphere is arranged on a lower end of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are uniformly arranged in the membrane shell with regular spaces. Dosage liquor or wastewater containing ammonia or organic amine is delivered through the tube pass of the hollow fibrous membranes (A), and absorption liquid is delivered through the tube pass of the hollow fibrous membranes (B). With the gas membrane provided by the invention, problems of traditional gas membranes of leakage and low service life are overcome; dilution of a byproduct ammonium salt solution caused by a concomitant osmotic distillation phenomenon can be effectively inhibited; ammonium salt concentration of the byproduct ammonium salt solution can be increased from 10-20% to 20-40%; mass transfer coefficient at the acid absorption liquid side can be substantially improved; the ammonia removing efficiency is high; the ammonia removing effect is stable for a long-term; and the service life of membrane sets can be improved by 3-10 times than common gas membranes.

The invention relates to a film coating agent for an extract medicament solid preparation, which comprises the following components in parts by weight: 30-60 parts of hydroxypropyl methyl cellulose, 5-30 parts of plasticizer and 2-30 parts of stearic acid. The invention also relates to a preparation method of the film coating agent, which comprises the following steps of: (1) weighing the hydroxypropyl methyl cellulose, the plasticizer and the stearic acid in parts by weight; and (2) adding the hydroxypropyl methyl cellulose, the plasticizer and the stearic acid into a high-speed shearing machine and uniformly mixing the materials at the speed of 350-600 rpm to prepare a coating agent finished product. The coating agent is safe and non-toxic, and can form a hydrophobic molecular layer onthe surface of a medicament for inhibiting the adsorption and osmosis of steam on the surface of a coating film, thereby reducing the moisture absorbing rate of a medicament coating tablet and preventing the damping and hardening of the medicament and medicament efficiency loss; meanwhile, the coating film has strong flexibility, and the coating quality is stable; and the preparation method has the outstanding advantages of high production efficiency, low energy consumption, favorable application performance of coating agent finished products, and the like.

The invention discloses a technology for producing ammonium sulfate and ammonium nitrate by simultaneously desulfurizing and denitrating the smoke of ammonia water and cobaltic ethylenediamine (II) by a wet method, which can realize that SO2 and NO are respectively converted into (NH4)2SO4 and NH3NO3 chemical fertilizers so as to realize the recycling of the SO2 and the NO. The method is different from ordinary denitration converting the NO into N2, but a traditional absorption method is adopted, and the method has moderate operation condition, is carried out under the conditions of normal temperature and normal pressure, and has high desulfurizing and denitrating effect, low investment, low operation expense and easy regeneration of absorption liquid.

The invention discloses an anticorrosive chromium-free passivating agent for a battery steel shell and a preparation method of the anticorrosive chromium-free passivating agent for the battery steel shell. The anticorrosive chromium-free passivating agent is prepared from, by mass, 5-15 parts of sodium bisulfite, 5-10 parts of titanyl nitrate, 1-5 parts of epoxy silane, 3-11 parts of tartaric acid, 1-5 parts of citric acid, 2-8 parts of sodium benzoate, 2-8 parts of acetic anhydride, 4-8 parts of tetramethyl orthosilicate, 1-5 parts of diamido-di-imidole, 0.2-1.6 parts of linolenate, 3-7 parts of tetraethyl orthosilicate, 2-5 parts of vanadate, 2-6 parts of surfactant and 30-60 parts of water. The passivating agent can form a compact film structure on the surface of the battery steel shell, the surface of the steel shell is smooth and compact, porosity is remarkably reduced, the corrosion potential is increased, corrosion current is reduced, the potential range of an anodic passivation area is widened, the mass transfer resistance is remarkably increased, and the corrosion-resistant performance is remarkably superior to the corrosion-resistant performance of a current passivated steel shell.

The invention discloses a system for deep treatment of coking wastewater by means of catalytic ozonation-ceramic membrane filtration, mainly consisting of an ozone generator, an ozone oxidation reactor, a booster pump, a ceramic membrane component, a gas-liquid separator, a tail gas absorbing device, a wastewater reflowing pump, a catalyst reflowing pump, a catalyst adding pump, a catalyst outflowing groove, a catalyst adding groove and corresponding pipe fittings, valves and instruments. According to the system, the application of a powder catalyst in a dynamic reactor can be realized due tothe combination of the catalytic ozonation and the ceramic membrane separation; the ozonation and the catalytic ozonation can be guaranteed to be carried out in a single reactor in a segmental way due to the convection current of the reflowing wastewater and the catalyst slurry and the impact of upcurrent; the mass transfer resistance when the ozonation and the catalytic ozonation are independently used can be reduced; the use ratio of hydroxyl free radical and the removal rate of organic matters can be improved; the aims, such as the COD (chemical oxygen demand), the chroma and the turbidityof the deeply-treated coking wastewater, can be achieved; and the problems that the activity is suddenly reduced when the powder catalyst is formed into particulates, the running needs to be suspended when the mass transfer resistance is increased due to the use of the particulate catalyst and the particulate catalyst is changed and the like can be solved.

The invention discloses a heat or flow management system used for a passive type direct methanol fuel cell. The heat or flow management system used for the passive type direct methanol fuel cell comprises an evaporator, a temperature control system, a reactant recovery device and a heat balance device. The reactant recovery device comprises a snake-shaped pipeline and a methanol cooling box. One end of the snake-shaped pipeline is connected with a reactant outlet of a cell reaction body. The other end of the snake-shaped pipeline penetrates through the lower portion of the methanol cooling box. The middle portion of the snake-shaped pipeline is arranged in the methanol cooling box. The methanol cooling box is arranged in room temperature environment. Liquid methanol is stored on the interior of the methanol cooling box. The lower portion of a box body is communicated with the evaporator through a valve. The heat balance device is composed of heat pipes in an evenly arranged and combined mode. According to the heat or flow management system used for the passive type direct methanol fuel cell, fuel for a cell reaction is provided through a steam form, the problem of penetration of methanol is effectively solved, an alcohol resistant property of the passive type direct methanol fuel cell is improved, working can be achieved under a condition with high methanol concentration, a fuel using rate is improved, speed of the cell reaction is improved due to improvement of positive electrode reactant temperature and pressure, and therefore a discharging rate is improved.

The invention discloses a rotary type hollow fiber porous membrane foamless oxygen charging device and method. The device comprises a rotary foamless membrane type oxygen charging assemble, an air supplying and exhausting system, a water supplying and draining system and a motor and electrical control system. In the method, the raw water is added in an activated sludge aeration basin, the rotary foamless membrane type oxygen charging assemble rotates in the aeration basin at the speed of several to tens revolutions per minute, the oxygen charging adopts the intermittent air charging and discharging way, the air feeding pressure is controlled under the bubble point of the fiber membrane, the oxygen is dissolved rapidly on the membrane surface and is dispersed into the sludge water under the drive of the concentration difference and the pressure difference, the dissolved oxygen concentration is kept at 1 to 2.5 mg / l, the rotary oxygen charging assemble play the role of the mixing and activated sludge stirring. Compared with the traditional aeration method, the invention has high oxygen transmissibility, good oxygen charging effect, little oxygen charging amount, lower energy consumption, little membrane pollution, and convenient change and maintenance, and is very suitable for the upgrading and reforming of the activated sludge aeration basin in the sewage treatment technology.

The invention discloses a silicon wafer hair-cutting liquid with no microscopic surface sharp corners and controllable roughness. The addition amount of each component can realize the controllable roughness of the surface of the silicon wafer after etching and no microscopic sharp corners are generated on the surface of the silicon wafer after etching.

The invention discloses an L-lactic acid fermentation method by using polyvinyl alcohol to solidify rhizopus oryzae. The method comprises the following steps: heating polyvinyl alcohol and sodium algiThe invention discloses an L-lactic acid fermentation method by using polyvinyl alcohol to solidify rhizopus oryzae. The method comprises the following steps: heating polyvinyl alcohol and sodium alginate in a boiling water bath to be jointly dissolved; mixing with a rhizopus oryzae spore suspension; using an injector to drip the mixed solution to a saturated boric acid solution containing calciumnate in a boiling water bath to be jointly dissolved; mixing with a rhizopus oryzae spore suspension; using an injector to drip the mixed solution to a saturated boric acid solution containing calcium chloride while using a magnetic stirrer to continuously stir so that particles are spherical and good immobilized particles can be hardened at a low temperature; and then, treating by a monobasic sodchloride while using a magnetic stirrer to continuously stir so that particles are spherical and good immobilized particles can be hardened at a low temperature; and then, treating by a monobasic sodium phosphate solution and washing with distilled water after solidified cells are propagated and grow so as to be used for the batch fermentation and the repetitive batch fermentation of the L-lacticium phosphate solution and washing with distilled water after solidified cells are propagated and grow so as to be used for the batch fermentation and the repetitive batch fermentation of the L-lactic acid. The improved L-lactic acid fermentation method by using the polyvinyl alcohol to solidify the rhizopus oryzae overcomes the defects of spherical carriers and poor permeability of the prior polyacid. The improved L-lactic acid fermentation method by using the polyvinyl alcohol to solidify the rhizopus oryzae overcomes the defects of spherical carriers and poor permeability of the prior polyvinyl alcohol and has the advantages of great mechanism strength, large acid production amount, high acid production speed and good repetitive use effect.vinyl alcohol and has the advantages of great mechanism strength, large acid production amount, high acid production speed and good repetitive use effect.

The invention provides a high-temperature-resistant heat-sensitive medical film and a preparation method thereof, which sequentially include a protective layer, a thermal imaging layer, a base material layer, and a back layer; the protective layer includes: polyurethane, polyvinyl alcohol, micron particle modified auxiliary agent, cyclotrimethylolpropane formal acrylate and deionized water. In the present invention, by mixing the polyurethane adhesive with the polyvinyl alcohol system, the protective layer can be made more excellent in terms of high temperature resistance, scratch resistance, transparency, reduced friction coefficient, and color density index. Sexual additives, through the micron particles soak into the membrane pores, fill the membrane pores, produce a strong interlocking effect with the system, increase the mass transfer resistance of water, reduce the permeability of water, thereby improving the waterproof performance, high temperature resistant thermal medical film has Excellent water resistance, good elasticity, strong flexibility, and good scratch resistance protective layer, which improves the color rendering effect of thermal imaging, greatly improves the stability of film imaging, and is easy to store.