36results about How to "Reduced mass transfer limitations" patented technology

The invention relates to a carrier-type TIO2 photo-catalyst, it's preparing method, and a high-absorbability photo-catalysis water purifier made from said material. Said carrier-type TIO2 photo-catalyst uses active carbon fiber base as substrate, which carries 100-600mgTIO2 / g active carbon fiber to form the TIO2 film in 100-300nm thick and the specific surface area in 150-400m2 / g. Said catalyst can be attained by powder plating method, liquid deposition method and sol-gel method of adhesive agent. The invention can keep the former space between active carbon fibers with the advantages that the liquid can freely enter the inner part of photo-catalyst and the ultraviolet light can radiate the inner part of photo-catalyst. The photo-catalysis water purifier with aforementioned carrier-type TIO2 photo-catalyst is in the shape of rectangle, while several photo-catalyst elements with said catalyst are inserted into the slot of purifier, the aeration system on the bottom can mix the treating liquid with air to reduce the mass transfer limit. Said purifier can effectively absorb the action bottom material; and improve the photo-catalysis process to apply the deeply-purification treatment of micro-pollution water.

The invention provides a titanium dioxide photonic crystal film for removing organic pollutants in the environment by photocatalytic degradation and a preparation method thereof, and belongs to the technical field of photocatalysis. In the invention, a film with a polystyrene opal structure is used as a template, sol is prepared by using tetrabutyl titanate, absolute ethanol and deionized water according to a certain molecular ratio of 1:100:5, the polystyrene template is repeatedly dip-coated with sol and sintered, and finally calcining is performed at a high temperature of 450 DEG C to remove the polystyrene template, and thus, the three-dimensional ordered porous titanium dioxide photonic crystal film with an inverse opal structure is obtained. The obtained titanium dioxide photonic crystal film has the characteristics of controllable film structure, high catalytic activity, high light utilization rate and simple preparation method and can realize high-efficiency removal of organicpollutants.

Use of a high shear mechanical device in a process for production of acetyl salicylic acid, by contacting acetic anhydride with salicylic acid in a high shear device. The disclosed process makes possible a decrease in mass transfer limitations, thereby enhancing production of acetyl salicylic acid. A system for production of acetyl salicylic acid is also provided in which a reactor is configured to receive the output from a high shear device, which is configured to receive, via one or more inlets, acetic anhydride, and salicylic acid and generate a fine dispersion or emulsion of reactants.

A method for introducing inhibitor into a fluid to be treated by forming a dispersion comprising droplets, particles, or gas bubbles of the inhibitor dispersed in a continuous phase of a carrier, wherein the droplets, particles, or gas bubbles have a mean diameter of less than 5 μm, and wherein either the carrier is the fluid to be treated or the method further comprises introducing the dispersion into the fluid to be treated. A system for inhibiting an undesirable component, the system comprising at least one high shear mixing device comprising at least one generator comprising a rotor and a stator separated by a shear gap, wherein the high shear mixing device is capable of producing a tip speed of the rotor of greater than 22.9 m / s, and a pump for delivering a mixture of a carrier and an inhibitor to the high shear mixing device.

A method of use for a high shear device incorporated into a process or system for the production of acetaldehyde from ethylene as a reactor device is shown to be capable of decreasing mass transfer limitations, by forming a feed stream emulsion, and thereby enhancing the acetaldehyde production process in the system.

A method for removing contaminant from feedwater by forming a dispersion comprising bubbles of a treatment gas in a continuous phase comprising feedwater, wherein the bubbles have a mean diameter of less than about 5 μm and wherein the treatment gas is selected from air, oxygen, and chlorine. A method for removing contaminants from a feedwater by subjecting a fluid mixture comprising feedwater and a treatment gas to a shear rate greater than 20,000 s−1 in a high shear device to produce a dispersion of treatment gas in a continuous phase of the feedwater. A system for treating feedwater to remove contaminants therefrom is also presented, the system comprising at least one high shear mixing device comprising at least one generator comprising a rotor and a stator separated by a shear gap; and a pump configured for delivering feedwater and treatment gas to the high shear mixing device.

Methods are described for depositing a film or discontinuous layer of discrete clusters, of material (e.g., metals, metal mixtures or alloys, metal oxides, or semiconductors) on the surface of a substrate, e.g., a patterned silicon wafer, by i) dissolving a precursor of the material into a supercritical or near-supercritical solvent to form a supercritical or near-supercritical solution; ii) exposing the substrate to the solution, under conditions at which the precursor is stable in the solution; and iii) mixing a reaction reagent into the solution under conditions that initiate a chemical reaction involving the precursor, thereby depositing the material onto the solid substrate, while maintaining supercritical or near-supercritical conditions. The invention also includes similar methods for depositing material particles into porous solids, and films of materials on substrates or porous solids having material particles deposited in them. The invention also covers methods of preparing a plated substrate by depositing a catalytic layer followed by a plating layer.

A system for treating feedwater to remove contaminants therefrom, the system comprising at least one high shear mixing device comprising at least one generator comprising a rotor and a stator separated by a shear gap, wherein the shear gap is the minimum distance between the rotor and the stator, and wherein the high shear mixing device is capable of producing a tip speed of the rotor of greater than 22.9 m / s (4,500 ft / min) and a pump configured for delivering feedwater and treatment gas selected from oxygen, air, and chlorine to the high shear mixing device.

Use of a high shear mechanical device incorporated into a process for the production of cumene hydroperoxide as a mixer / reactor device is capable of decreasing mass transfer limitations, thereby enhancing the cumene hydroperoxide production process. A system for the production of cumene hydroperoxide from oxidation of cumene, the system comprising a reactor and an high shear mixer the outlet of which is fluidly connected to the inlet of the reactor; the high shear mixer capable of providing a dispersion air gas bubbles within a liquid, the bubbles having an average bubble diameter of less than about 100 μm.

The invention belongs to the technical field of fermentation and discloses a preparation, separation and impurity-removal purification method of L-malic acid. The methods comprise the following steps of: 1) fermentation; 2) transparent treatment; 3), separation and impurity removal; and 4) purification. The output of the malic acid prepared by the method is high, and the product yield and purity are high after impurity-removal purification.

The invention relates to a stable immobilized lipase product and a preparation method thereof. By the immobilized lipase product with high random ester exchange enzyme activity, mass transfer limitation is reduced.

Use of a high shear mechanical device incorporated into a process for the production of chloral as a reactor device is capable of decreasing mass transfer limitations, thereby enhancing the chloral production process. A system for the production of chloral from acetaldehyde and chlorine, the system comprising a reactor and an external high shear device the outlet of which is fluidly connected to the inlet of the reactor; the high shear device capable of providing a dispersion of chlorine gas bubbles within a liquid, the bubbles having an average bubble diameter of less than about 100 μm.

The invention discloses a device and a method for jointly degrading organic matters in bottom mud of a water body by utilizing scrap iron and a sediment microbial fuel cell, and relates to a device and a method for degrading the organic matters. The method is used for solving the technical problem of low removal rate of the existing bottom mud organic matter removal method. The device comprises acontainer, a sealing cover, a carbon fiber brush anode, a carbon fiber brush cathode, a battery, a surface aerator, a submersible motor and a switch, the carbon fiber brush anode and the carbon fiberbrush cathode are respectively arranged at the bottom and the upper part of the container and are respectively connected with the battery; an aeration head is arranged below the cathode; a rotating middle shaft of the submersible motor is connected with the carbon fiber brush anode; the submersible motor is connected in series with the switch and then connected to the battery. The method comprisesthe following steps: adding the bottom mud polluted by the organic matters in the water body and corresponding overlying water into the container, and adding waste scrap iron into the bottom mud; performing aeration on the overlying water for degradation treatment. And after operation for 120 days, the removal rate of the organic matters reaches 80.6% or above and is nearly three times that of natural degradation. The method can be used in the field of water sediment remediation.

The invention belongs to the technical field of fermentation and discloses a preparation, separation and impurity-removal purification method of L-malic acid. The methods comprise the following steps of: 1) fermentation; 2) transparent treatment; 3), separation and impurity removal; and 4) purification. The output of the malic acid prepared by the method is high, and the product yield and purity are high after impurity-removal purification.

A method of use for a high shear device incorporated into a process or system for the production of acetaldehyde from ethylene as a reactor device is shown to be capable of decreasing mass transfer limitations, by forming a feed stream emulsion, and thereby enhancing the acetaldehyde production process in the system.

The invention relates to a carrier-type TIO2 photo-catalyst, it's preparing method, and a high-absorbability photo-catalysis water purifier made from said material. Said carrier-type TIO2 photo-catalyst uses active carbon fiber base as substrate, which carries 100-600mgTIO2 / g active carbon fiber to form the TIO2 film in 100-300nm thick and the specific surface area in 150-400m2 / g. Said catalyst can be attained by powder plating method, liquid deposition method and sol-gel method of adhesive agent. The invention can keep the former space between active carbon fibers with the advantages that the liquid can freely enter the inner part of photo-catalyst and the ultraviolet light can radiate the inner part of photo-catalyst. The photo-catalysis water purifier with aforementioned carrier-type TIO2 photo-catalyst is in the shape of rectangle, while several photo-catalyst elements with said catalyst are inserted into the slot of purifier, the aeration system on the bottom can mix the treating liquid with air to reduce the mass transfer limit. Said purifier can effectively absorb the action bottom material; and improve the photo-catalysis process to apply the deeply-purification treatment of micro-pollution water.

The invention discloses a method for improving apparent catalytic activity of glutamic acid decarboxylase recombinant engineering bacteria. The method comprises the steps of inoculating the glutamic acid decarboxylase recombinant engineering bacteria into a culture medium for shake cultivation so as to obtain a seed solution; inoculating the seed solution into the culture medium for shake cultivation, adding an inducer for induction cultivation when OD600 is 0.6-0.8 hour, and simultaneously adding a cell wall synthesis inhibitor or surfactant into the culture medium so as to interfere in synthesis of recombinant bacteria cell walls or (and) cell membranes to achieve the purposes of enhancing the permeability of the bacteria and improving the apparent catalytic activity of the bacteria; and after induction cultivation, collecting the bacteria so as to obtain the glutamic acid decarboxylase recombinant engineering bacteria with the apparent catalytic activity improved. The method for improving apparent catalytic activity of glutamic acid decarboxylase recombinant engineering bacteria is free from multiple processing steps for permeability treatment after cultivation of conventional bacteria and is simple, convenient and efficient, and low in cost.

A method for introducing inhibitor into a fluid to be treated by forming a dispersion comprising droplets, particles, or gas bubbles of the inhibitor dispersed in a continuous phase of a carrier, wherein the droplets, particles, or gas bubbles have a mean diameter of less than 5 μm, and wherein either the carrier is the fluid to be treated or the method further comprises introducing the dispersion into the fluid to be treated. A system for inhibiting an undesirable component, the system comprising at least one high shear mixing device comprising at least one generator comprising a rotor and a stator separated by a shear gap, wherein the high shear mixing device is capable of producing a tip speed of the rotor of greater than 22.9 m / s, and a pump for delivering a mixture of a carrier and an inhibitor to the high shear mixing device.

The invention belongs to the technical field of microbial fermentation, and discloses a technology for producing a malic acid employing fermentation of aspergillus oryzae. The technology comprises the following steps of preparing an aspergillus oryzae seed solution, preparing the malic acid through fermentation, adding calcium carbonate and CTAB in the fermentation process, and adjusting the pressure intensity and the temperature. Through on permeability treatment on a bacterial strain, the technology is simple, the cost is low and the yield of the malic acid is improved.

Use of a high shear mechanical device incorporated into a process for the production of chloral as a reactor device is capable of decreasing mass transfer limitations, thereby enhancing the chloral production process. A system for the production of chloral from acetaldehyde and chlorine, the system comprising a reactor and an external high shear device the outlet of which is fluidly connected to the inlet of the reactor; the high shear device capable of providing a dispersion of chlorine gas bubbles within a liquid, the bubbles having an average bubble diameter of less than about 100 μm.

The invention belongs to the technical field of microbial fermentation and discloses a method for producing L-malic acid by molasses fermentation. The method includes: step 1) molasses pretreatment; step 2) fermentation medium preparation; step 3) acidogenic fermentation. The method is simple in molasses treatment process, acid treatment and cyaniding treatment are avoided, and accordingly cost saving is realized, and addition quantity of inorganic minerals in a culture medium is increased.

The invention belongs to the technical field of amino acid preparation and discloses a fermentation technology for refinement of glutamic acid. The technology comprises the steps as follows: step 1) preparation of a seed solution; step 2) preparation of a fermentation solution; step 3) separation; step 4) concentration and crystallization. With the adoption of the technology, the fermentation acid production efficiency is improved, and the purity and yield of a product obtained with the separation and purification technology are high.

The invention belongs to the technical field of harmless treatment of chromium slag and arsenic-containing wastewater, and relates to a co-treatment method of chromium slag and acidic arsenic-containing wastewater. According to the co-treatment method for the chromium slag and the acidic arsenic-containing wastewater, the inherent characteristics and complementarity of the chromium slag and the acidic arsenic-containing wastewater are fully utilized, and neutralization of alkali in the chromium slag, reduction / stabilization of hexavalent chromium, neutralization of acid in the acidic arsenic-containing wastewater and removal of arsenic are synchronously realized; the treatment cost of the chromium slag and the acidic arsenic-containing wastewater is reduced through the thought of treating waste with waste. A large number of strong acid substances exist in the acidic arsenic-containing wastewater, mineral occurrence state Cr (VI) in the chromium slag can be effectively converted into water-soluble state Cr (VI), and mass transfer limitation in the reduction and stabilization process of the Cr (VI) is reduced; and meanwhile, a large amount of mineral components with arsenic adsorption capacity exist in the chromium slag, so that arsenic in the wastewater can be effectively fixed, and the use and treatment cost of chemicals is greatly reduced.

The invention belongs to the technical field of biological fermentation and discloses a method for preparing, extracting and purifying threonine, which comprises the following steps: 1) fermentation, 2) centrifugation, 3) microfiltration and ultrafiltration, 4) concentration, isoelectric and crystallization. The process of the invention is simple and feasible, the threonine fermentation efficiency, yield and purity are high, and the application prospect is broad.

Use of a high shear mechanical device in a process for production of acetyl salicylic acid, by contacting acetic anhydride with salicylic acid in a high shear device. The disclosed process makes possible a decrease in mass transfer limitations, thereby enhancing production of acetyl salicylic acid. A system for production of acetyl salicylic acid is also provided in which a reactor is configured to receive the output from a high shear device, which is configured to receive, via one or more inlets, acetic anhydride, and salicylic acid and generate a fine dispersion or emulsion of reactants.

The invention discloses an ultraviolet laser optical fiber ozone generator, which is characterized in that a pressure reducing valve and a flow transmitter are arranged on a communication pipeline between an oxygen tank and an ozone generator, an optical fiber coupler at the upper end of the ozone generator is connected with an ultraviolet laser light source through a conduction optical fiber, thelower end of the ozone generator is communicated with a dispersion optical fiber in the ozone generator, one end of the ultraviolet laser source is connected with a control system through a voltage regulator, the flow transmitter is connected with the control system, the upper portion and the lower portion of the interior of the ozone generator are each provided with a dispersion optical fiber fixing plate, gas channels are formed in the optical fiber fixing plates, and a gas outlet is formed below the ozone generator. During working, pure oxygen is decompressed and enters the ozone generator, the oxygen is distributed through the optical fiber fixing plates and enters the ultraviolet laser excitation chamber, ultraviolet laser radiates ultraviolet light to the periphery through the dispersion optical fiber, the oxygen absorbs the energy of the ultraviolet light to become oxygen monons, and the oxygen monons are combined with the oxygen atoms to produce ozone. According to the device,the illumination contact area is increased, light distribution is more uniform, mass transfer limitation is reduced, and the light utilization rate is remarkably increased.

The invention belongs to the technical field of harmless treatment of chromium slag and arsenic-containing wastewater, and more specifically relates to a method for co-processing chromium slag and acidic arsenic-containing wastewater. A method for co-processing chromium slag and acidic arsenic-containing wastewater provided by the present invention fully utilizes the inherent characteristics and complementarity of chromium slag and acidic arsenic-containing wastewater to simultaneously realize the neutralization of alkali in chromium slag and the reduction of hexavalent chromium / Stabilize and neutralize acid in acidic arsenic-containing wastewater and remove arsenic, and reduce the treatment cost of chromium slag and acidic arsenic-containing wastewater through the idea of ​​"treating waste with waste". There are a large amount of strong acid substances in the acidic arsenic-containing wastewater used in the present invention, which can effectively convert the mineral occurrence state Cr(VI) in the chromium slag into water-soluble Cr(VI), and reduce the mass transfer limitation in the process of reducing and stabilizing Cr(VI) ; At the same time, there are a large number of mineral components with arsenic adsorption capacity in the chromium slag used at the same time, which can effectively fix the arsenic in the wastewater, and greatly reduce the use of chemicals and treatment costs.