32results about How to "Improved mass transfer properties" patented technology

A technology for synchronously removing N and P from the city sewage features that the composite suspended living things system with active sludge and biomembrane is created in a batch of composite bioreactors, which in running by the sequence of anaerobic, aerobic and anoxic steps. Its advantages are short reaction flow, less consumption of carbon source, high effect and low cost.

The invention discloses a method to extract chromocor from duck bran, which comprises the following steeps: a, sorting duck kernel; removing impurity; grinding; sieving; separating out bran; b, controlling water in bran between 10% and 16%; entering into squeezing and swelling device; treating; getting puffy porous granular material; c, defatting the bran material; d, extracting several times with alcohol dissolvent; separating; merging filter liquor; e, condensing the filter liquor; cooling; aging; proceeding chromocor evolution; separating; washing; drying; getting the extract.

The invention discloses a three-dimensional fuel cell catalyst layer electrode and a preparation method thereof. The fuel cell catalyst layer electrode is formed by processing of a catalyst material,a filler material, an ion conductor solution and a solvent; the catalyst material is a carbon-supported platinum catalyst or a carbon-supported platinum alloy catalyst; the filler material is one or amixture of at least two of a multiwalled carbon nanotube, VGCF-X and VGCF-H; the ion conductor solution is a perfluorinated sulfonic acid ionomer resin solution; and the solvent is one or a mixture of at least two of ethyl alcohol, isopropyl alcohol and normal propyl alcohol. According to the invention, three-dimensional filler material is added to a conventional catalyst layer slurry, such as acarbon nanotube or a carbon nanofiber material, and by mixing the filler material with a carbon-supported catalyst, a three-dimensional space is formed in the catalyst layer, so as to reduce the masstransfer resistance in the electrode, improve the mass transfer characteristic of the catalyst layer in a high current density, and further greatly improve the output performance and the stability ofthe fuel cell electrode.

Catalysts are disclosed comprising fibrous substrates having silica-containing fibers with diameters generally from about 1 to about 50 microns, which act effectively as “micro cylinders.” Such catalysts can dramatically improve physical surface area, for example per unit length of a reactor or reaction zone. At least a portion of the silica, originally present in the silica-containing fibers of a fibrous material used to form the fibrous substrate, is converted to a zeolite (e.g., having a SiO₂/Al₂O₃ ratio of at least about 150) that remains deposited on these fibers. The fibrous substrates possess important properties, for example in terms of acidity, which are useful in hydroprocessing (e.g., hydrotreating or hydrocracking) applications.

The invention relates to a method for synthesizing polyether glycol in a microstructure reactor, which comprises the following steps: respectively pumping oxyalkylene and a catalyst liquid generated by reacting an alkaline catalyst and an initiator into the microstructure reactor composed of a micro-mixer and a retention time prolonging pipe, reacting while controlling the reaction temperature and pressure, neutralizing the reaction solution, adsorbing, degassing and filtering to obtain the refined polyether glycol. The hydroxyl value of the refined polyether glycol is 50-550 mgKOH/g, and the relative molecular mass is 300-3300 g/mol. The method overcomes the defects of long initiation time and low operational efficiency in the intermitted technique, solves the problems of complex equipment, high requirements for technological condition control and long retention time in the continuous technique, implements quick and continuous production, and has the advantages of short reaction time, simple technique, high safety, high controllability, high adjustment flexibility, continuous operation and the like.

The invention discloses a technological method for municipal wastewater nitrogen and phosphorus removal. In the method, municipal wastewater is put into a bioreactor placed by a load microorganism magnetism seed and/or a magnetic zoogloea so as to carry out biological reaction treatment, obtained mixture liquid is sent into a magnetic separator so as to carry out first separation, coagulant is put into liquid after being separated so as to carry out reaction and enters rare earth magnetic disc separation equipment so as to carry out secondary separation, magnetic and active mud formed after separation refluxes into the bioreactor, and outlet water is drained as standard drainage water. Because a technology of combining biological reaction with drug adding magnetic separation is adopted, the invention has the advantages of low investment and running cost compared with a membrane bioreactor, high separation efficiency, low energy consumption, favorable effects of nitrogen and phosphorus removal, SS, COD and BOD and small occupied area and is particularly suitable for treating the municipal wastewater with large flow and high concentration and revamping the traditional municipal wastewater processing plant with capacity expansion.

A process for extracting the buckwheat protein from the buckwheat bran includes such steps as controlling the content of water in buckwheat, extruding for puffing, extracting in the aqueous solution of NaOH, recovering supernatant, regulating pH value until its isoelectric point of protein, educing out protein, removing filtrate, drying and pulverizing.

The invention relates to a method for efficiently extracting flavone from ginkgo leaves and converting flavone into aglycon flavone. Ginkgo leaves are washed clean and ground, the ginkgo leaves are mixed with water, loaded into a fermentation tank and sterilized under 121 DEG C, and steam explosion is then carried out; aspergillus niger is then added for fermentation; mixed enzyme solution is then added, the added amount is 2 to 5 percent of reaction substrate, and the time of reaction under the condition of 25 DEG C to 30 DEG C is 3 to 6 hours; Beta-glucosidase is then added, the added amount is 1 percent of the reaction substrate, the reaction condition is that pH is 4.3 under the condition of 42 DEG C, and the reaction time is 5 hours; 1 percent of protease is then added, and the time of reaction under the condition of 25 DEG C to 30 DEG C is 3 to 4 hours; temperature is increased to 95 DEG C for 10 minutes, extractant is then added to extract flavone, 12000g centrifuging is carried out for 20 minutes, supernatant is extracted and concentrated, ethanol is then adopted for extraction, so that ethanol eluent is obtained, the ethanol eluent is concentrated, freeze-drying is adopted, and thereby the product is obtained.

The invention discloses a production technology for preparing methanol by continuous oxidation of methane, comprising the following steps: methane gas and solvent dissolved with catalyst are respectively preheated to the reaction temperature of 160-220 DEG C and are added into a packed bubbling tower from the entrance of the bottom of the packed bubbling tower, and the two flow upward and pass through the packed bubbling tower, and the retention time is 10-40min; the reaction pressure is 1-6MPa, liquid phase product of methyl hydrogen sulphate is generated by reaction, and methanol is obtained by rectification and hydrolysis; and the reacted tail gas is discharged from the exit of the top of the packed bubbling tower. The invention has the advantages of simple technology, low running cost, selection of suitable reactor and capability of continuous production, belonging to the field of methanol production.

The invention discloses a method for in-situ synthesis of a nano Zn/Al-ZSM-5 molecular sieve with a steam-assisted dry glue conversion method. The invention belongs to the field of preparation of zeolite molecular sieve catalysts and aims to solve the problems that a conventional method for synthesizing a nano Zn/Al-ZSM-5 molecular sieve is long in crystallization time, large in energy consumption, large in molecular sieve crystal granule size and large in product waste liquid amount. The method comprises the following steps: I, weighing raw materials; II, mixing aluminum isopropoxide, a tetrapropylammonium hydroxide solution, tetraethoxysilane, zinc nitrate hexahydrate and deionized water, and carrying out vacuum drying so as to obtain a dry glue; and III, grinding the dry glue, putting the dry glue into a vessel at the upper part of a crystallization kettle, supporting the vessel by using a bracket, feeding deionized water into the bottom of the crystallization kettle, and carrying out crystallization at 160-190 DEG C, so as to obtain the nano Zn/Al-ZSM-5 molecular sieve. By adopting the method disclosed by the invention, the problem that a product is hard to separate from a mother liquid in the hydrothermal crystallization process is effectively avoided, the yield of the molecular sieve can be greatly increased, and a waste liquid with organic matters and alkalis are not generated after crystallization.

The invention relates to the technical field of catalytic burning, in particular to a pulsation wire mesh catalytic burning device and method. The device comprises a sound decoupling chamber (1) and a Rijke pipe (3) and further comprises a wire mesh catalytic bed layer (2) arranged in a Rijke type pulsation wire mesh catalytic burner main body. Compared with the prior art, the device and method has the advantages of being high in catalytic burning efficiency, less in pollutant discharge, simple and compact in structure and less in investment, reducing resistance, reducing boundary layer flowing resistance due to the fact that air flow is in the pulsation state and reducing air flow resistance correspondingly when the air flow passes through the wire mesh catalytic bed layer. The device and method can be used for purifying volatile organic contaminant (VOCs) discharged by a fixed source and can also be used for high-efficiency utilization of low heating value combustible rich-hydrogen gas like blast furnace gas and contaminant emission reduction.

The embodiment of the invention provides a water treatment composite electrode based on a metal-based fiber material. The water treatment composite electrode comprises a metal fiber matrix, a micro-nano configuration metal surface layer, a metal oxide catalyst layer and a surface modification layer, wherein the micro-nano configuration metal surface layer is a metal surface layer which grows on the metal fiber matrix and has a micro-nano morphology of a micro column, a micro wire, a micro rod, a nano rod or a nano wire array; the metal oxide catalyst layer is a metal oxide array which grows in situ on the micro-nano-configuration metal surface layer and has a nanowire, nanorod or nano-cone appearance; and the surface modification layer is a super-hydrophobic coating or a conductive coating loaded on the metal oxide catalyst layer. According to the invention, surface-to-body ratio is high, the surface area is high, the effective area under a unit mass electrode (the specific electrode mass active area) is large; due to the special micro-nano interface characteristic and the open structure of the fiber electrode, the water treatment electrode is suitable for different water treatment scenes, and meanwhile, the water treatment electrode has the advantages of being high in oxidation capacity, excellent in mass transfer performance, long in service life, easy to machine and low in energy consumption.

The invention discloses a supported titanium dioxide photocatalyst taking ordered macroporous carbon as a carrier, and a preparation method thereof. The TiO2 content of the catalyst is 5 to 70 weight percent; and the average pore diameter of the catalyst is between 30 and 900nm, and the specific surface area of the catalyst is between 400 and 1,500m2/g. The preparation method for the catalyst comprises the following steps: assembling a TiO2 template; filling a carbon precursor into gaps of the template, performing high-temperature carbonization, removing the template, and preparing the ordered macroporous carbon; and loading a TiO2 precursor onto the ordered macroporous carbon in a form of sol or suspension, and roasting to prepare the catalyst. The catalyst has high specific surface area and a three-dimensionally run-through porous channel structure with large size, and is particularly suitable for photocatalytic degradation treatment on macromolecular organic pollutants.