279results about How to "Fast desorption" patented technology

The invention relates to microencapsulated fragrance compositions formed by spray drying an oil-in-water emulsion wherein the encapsulating material is a polymeric surfactant, for example polyvinyl alcohol. The encapsulating material contains no additional surfactant material.

The present invention relates to the extracting and purifying method of capsanthin pigment with high color number, low spicy degree and no bad taste from ripe chili fruit or peel. The extracting and purifying process includes organic solvent extraction, depression concentration of extractive liquid and separation and purification of the concentrate with macroporous adsorption resin. Measurement in ultraviolet spectrophotometric method shows that the capsanthin pigment of the present invention has color number up to 100 (E449nm) and no spicy taste.

The invention relates to preparation and application of a lignin or an aminolignin-modified magnetic nano-adsorbent. The magnetic nano-adsorbent is obtained by a one-step conversion of lignin and a raw material iron salt by a modified chemical coprecipitation method. The main method is to prepare surface-modified magnetic nanoparticles by dissolving lignin or amino-modified lignin in an alkaline precipitant and using the alkaline precipitant for coprecipitation. The synthesized magnetic nano-adsorbent has adsorption capacity for both anionic dyes and cationic dyes. Compared with other lignin-based adsorbents, the adsorption capacity is increased by about 2 to 5 times. At the same time, desorption can be achieved by adjusting of the pH, so that the adsorbent is recycled, and the dyes can berecovered. Lignin raw materials used in the adsorbent are industrial and agricultural waste materials, the materials are rich and low in price, the synthesis method is simple and efficient, and the adsorbent is economical and environmentally friendly, and has good application prospects.

Membranes for membrane distillation include at least one hollow fiber porous hydrophobic membrane, the at least one membrane including carbon nanotubes incorporated into the pore structure of the membrane. Membrane distillation systems may include a heat exchanger operably connected to a hollow fiber membrane module with one or more membranes including carbon nanotubes. Methods of solvent removal, sample preconcentration and desalination employing hollow fiber porous hydrophobic membranes with carbon nanotubes are disclosed.

The invention relates to a full-automatic shale gas content testing analyzer which comprises a desorbing device, a gas detection device, a data acquisition box and a host computer, wherein the desorbing device consists of a constant temperature water bath box and two desorbing tanks; the desorbing tanks are arranged in the constant temperature water bath box; shale samples can be rapidly put into the desorbing tanks; the gas detection device comprises a box body, a measuring cylinder, a gas collecting bottle and a pressure sensor; a liquid inside the bottle is pressed into the measuring cylinder by a shale gas collected into the gas collecting bottle; the data acquisition box comprises an acquisition box frame, a front panel, a rear panel and a hardware circuit; the hardware circuit is provided with a power supply module, a signal receiving module and a signal processing module; the data acquisition box is used for acquiring a signal detected by the detection device, and used for performing analog-to-digital to transmit to the host computer; the host computer is used for displaying, storing and analyzing the signal. The analyzer provided by the invention is scientific in design and convenient to rapidly disassemble, package and carry over. By adopting the analyzer, full-automatic measurement in the whole gas desorbing process can be achieved, and the measurement precision is high.

The present invention relates to the process of extracting capasaicin from chili fruit or peel and preparing natural capsaicin crystal. Capsaicin is obtained through organic solvent extraction of thespicy component from chili fruit or peel, depressing concentration and separation and purification with macroporous adsorption resin. Liquid chromatographic test shows that the extract has total content of capsaicin and dihydrocapsaicin up to 33%. Re-crystallizing the macroporous adsorption resin purified extract may obtain natural capsaicin crystal with capsaicin, dihydrocapsaicin and nordihydrocapsaicin in the total content up to 97%.

The invention discloses a sustained circulating type method for adsorbing and recycling oil gas , which consists of the following steps: (1) adsorbing and recycling the oil gas by means of an active carbon bed in an adsorption tower; (2) the desorption and regeneration of the adsorption tower saturated is carried out; (3) the oil gas desorbed with high concentration enters a recovery tower to be absorbed by the body of liquid meager gasoline; (4) the tail gas in the recovery tower reenters the adsorption tower to be cycled in a sustaining way, wherein, at least two adsorption tanks in the adsorption tower alternately carry out adsorption and desorption generation, thus leading the oil gas adsorption to be carried out in a sustained circulating way, at the same time, the remote monitoring can be realized by using an automatic control program. The sustained circulating type method for adsorbing and recycling oil gas of the invention is characterized by high efficiency, low energy consumption, convenient operation and safe and reliable running.

The invention discloses a method for preparing a conductive polymer ordered nano membrane which comprises the preparation of a surface active agent ordered membrane and a surface active agent/conductive polymer composite ordered membrane. The method is characterized in that the method of modifying the Langmuir-Blodgett(LB) ordered nano membrane is utilized, active points supplied by the nano membrane are utilized to fix oxidizer, and the method for dispersing adsorption and polymerization of single gas is also utilized to obtain the conductive polymer multi-layer ordered nano membrane. The conductive polymer composite nano membrane obtained by the method has the advantages of ordered laminarization, good conductive performance and adjustable multi-layer distance of membranes. The method can be applied to the preparation of the high-conduction polymer membrane and a gas sensor sensitive membrane.

The invention belongs to the technical field of organic polluted soil remediation and discloses a method for remediating phthalic acid esters (PAEs) polluted soil by using microwave enhanced calcium peroxide. The method comprises the steps of preparing a slurry soil mixed solution from the PAEs polluted soil according to a certain liquid-solid ratio; adding a certain quantity of citric acid, ferrous sulfate and calcium peroxide into the solution; and carrying out microwave treatment and standing to enable the degradation rate of PAEs in the soil to reach more than 80%. The method has the advantages of simple process condition, low operation requirement, high treatment efficiency, low oxidizing agent waste and the like and is suitable for remediating the PAEs polluted soil.

The invention discloses a cold and hot type adsorption-desorption device and an adsorption-desorption method thereof, belonging to a device and a method for treating organic waste gas. The device comprises an adsorption tank which is provided with an opening used for leading in waste gas and vacuumizing, a clean gas outlet, a tube pass inlet used for leading in cold medium or hot medium and a tubepass outlet used for leading out cold medium or hot medium; the adsorption tank is internally provided with tube arrays which are evenly distributed in the adsorption tank, and the two ends of the tube arrays are respectively communicated with the tube pass inlet and the tube pass outlet; a shell pass of the adsorption tank is internally filled with adsorbing medium which surrounds the tube arrays; and the adsorption tank also carries out low temperature adsorption and high temperature desorption operations. In the invention, the adsorption tank is provided with tube arrays, and cold medium or hot medium can be led into the tube arrays, thus realizing low temperature adsorption and high temperature desorption operations, reducing the level of vacuumizing, saving energy consumption, substantially reducing requirements on the device in the desorption process, improving the adsorption and desorption efficiency, prolonging the service life of the adsorption medium and saving production cost.

The invention relates to a method for preparing propylene by fluidized bed olefin disproportionation, and mainly to solve the problem of deactivation of a catalyst due to rapid coking in the prior art. According to the technical scheme, ethylene and butylene are used as raw materials, and the raw materials and a fluidized bed catalyst are in contact with each other to react to generate a propylene-containing material flow under the condition that the reaction temperature is 320 to 500 DEG C, the reaction pressure is 0 to 1 MPa based on the absolute pressure, and the weight hourly space velocity is1 to 20 h<-1>, wherein the fluidized catalyst comprises the following components in parts by weight: a) 1 to 20 parts of tungsten oxide and b) 80 to 99 parts of a silicon oxide carrier. According to the method, a problem in the prior art is better solved; the preparation method can be used for the industrial production of propylene by olefin disproportionation.

The invention provides an overlong vanadium pentoxide nanowire harness with a hierarchical structure and a preparation method thereof. The length of the wire harness is not shorter than 10 cm; the diameter of the wire harness is 1-3 microns; the wire harness comprises parallel overlong nanowires; the diameters of the nanowires are 20-30 nm and the lengths of the nanowires are longer than 100 microns to 1 mm. The preparation method comprises the following steps: preparing a vanadium pentoxide sol by using a melting and quenching method; putting 40 ml sol to a reaction kettle; reacting the sol for 2-4 days under a condition of 160-200 DEG C so as to obtain a suspension containing overlong vanadium pentoxide nanowires; enabling a slender glass fiber to extend into the vanadium pentoxide nanowire suspension; lifting the slender glass fiber at a constant speed so as to obtain the wire harness; drying the obtained wire harness; carrying out heat treatment on the wire harness under an air atmosphere under a condition of 400-600 DEG C; and finally obtaining the overlong vanadium pentoxide nanowire harness with the hierarchical structure. A gas sensitive device assembled by using materials has the advantages of rapid response, good stability, sensitivity of 2.6 and low working temperature of 60 DEG C.

This invention pertains to adsorption by an adsorbent of an adsorbate and to regeneration of the loaded adsorbent. The adsorption includes contacting an adsorbent selected from arylene-bridged polysilsesquioxanes and derivatives thereof with an adsorbate selected from aromatics and heterocyclics, particularly monocyclic heterocyclics containing carbon and nitrogen atoms in a 6-member non-aromatic ring, for a period of time sufficient to adsorb all or part of the adsorbate by the adsorbent. Regeneration of the loaded adsorbent includes removing all or part of adsorbate from the adsorbent by means of an alcohol wash or by thermal desorption of the adsorbent containing the adsorbate.

The invention discloses an ethanol gas sensor based on an In2O3 microflower/SnO2 nanoparticle composite material and a preparation method of the sensor, belonging to the technical field of gas sensors. The ethanol gas sensor consists of a nickel-cadmium alloy heating coil, an alumina ceramic tube, a platinum wire, a gold electrode and an In2O3 microflower/SnO2 nanoparticle composite material. By utilizing the catalytic activity of SnO2 on In2O3, the oxidative activity of the material is improved, so that the sensitivity of the sensor is greatly improved, materials with morphology are directly mixed at the first time, the large specific surface area of the material is utilized, and the catalytic characteristics between oxides are utilized. According to the material, ethanol gas molecules are transported on the surface and have the characteristics of rapid adsorption and desorption, so that the response and recovery speed of the sensor is increased. Compared with an ethanol sensor manufactured by In2O3 microflowers which are not compounded with SnO2 nanoparticles, the ethanol sensor disclosed by the invention has the advantages that the sensitivity is greatly improved, and the sensitivity of the ethanol sensor disclosed by the invention is about 9.5 times that of the sensitivity of the ethanol sensor manufactured by In2O3 microflowers.

The invention relates to a movable skid-mounted natural/coal bed gas adsorption and purification system with an external medium heat exchange function, which comprises an adsorption tower system and a heat conduction medium heating circulation and cooling circulation system. The adsorption tower system consists of three adsorption towers which are connected in parallel and are switched to be started; one tower is used for adsorption, another tower is used for heating desorption and the third tower is used for cooling; in the heating desorption process, an adsorbent is heated by a high temperature heat conduction medium which is from external circulation so as to be rapidly heated and desorbed, and simultaneously, a small volume of purified process gas is used as regenerated gas to take away impurities generated in the desorption process; and in the cooling process, the adsorbent is cooled by a low temperature heat conduction medium which is from external circulation, so that the temperature of the adsorbent is rapidly reduced and the regeneration process is completed. Regeneration time of the adsorbent can be shortened; consumption of the regenerated gas is reduced; meanwhile, adsorption period is reduced and the heights of the adsorption towers are reduced; and the adsorption and purification system is miniaturized.

The present invention relates to carbon nanofibers, and more particularly, to a method capable of preparing metal oxide-containing porous carbon nanofibers having a high specific surface area by changing the composition of a spinning solution, which is used in a process of preparing carbon nanofiber by electrospinning, and to metal oxide-containing porous carbon nanofibers prepared by the method, and carbon nanofiber products comprising the same.

The invention relates to a preparation method of ofloxacin and 17beta-estradiol double-template molecularly-imprinted composite microspheres, which comprises the following steps of: preparing monodisperse cross-linked epoxypropyl methacrylate microspheres with vinyl bonded on surfaces by using 1, 4-dioxane as a solvent, and preparing the ofloxacin and 17beta-estradiol double-template molecularly-imprinted composite microspheres by using two antibiotics ofloxacin and 17beta-estradiol as templates and by adopting a surface-imprinting technology. The preparation method disclosed by the inventionhas mild reaction conditions and can be used for preparing the double-template molecularly-imprinted composite microspheres which have better identifying performance for the ofloxacin and the 17beta-estradiol, can be rapidly adsorbed and desorbed and have good stability, so that the simultaneous purification and enrichment of two or more trace components are realized, and references are provided for the simultaneous and rapid detection of multiple medicaments in foods.

Analytes are rapidly desorbed from a carbonaceous sorbent powder with improved quantitation and reduced analyte re-adsorption, thermal degradation, and rearrangement. The sample is distributed in a thin layer onto a desorption surface within a chamber. The layer can be a monolayer. Heating light irradiates the sample through a window, directly and rapidly heating the sample while the desorbed analytes diffuse into a vacuum or are removed by a carrier gas. Finally, the sorbent is flushed from the chamber by a transport gas. The desorption surface can be an inner surface of the window, or a surface of a porous frit that divides the chamber into two sections. The frit can be stainless steel or glass. The carrier gas can be helium, argon, or carbon dioxide. The light source can be a tungsten halogen lamp. A heater can control the chamber temperature according to a heating profile.

The invention relates to a device for remedying soil contaminated by volatile organic compounds. The device for remedying the soil contaminated by the volatile organic compounds comprises a heating control system, a thermal desorption pipe arranged in the heating control system, a rotation control system in transmission connection with the thermal desorption pipe, an air inlet pipeline system and an air outlet pipeline system, wherein the air inlet pipeline system and the air outlet pipeline system are arranged at the two ends of the thermal desorption pipe. A plurality of tooth-shaped shoveling plate are arranged on the inner wall of the thermal desorption pipe. A multi-hole dust filter screen is further arranged at the end, connected with the air outlet pipeline system, of the thermal desorption pipe. The air outlet pipeline system is communicated with an external tail gas absorption system. Compared with the prior art, the device is simple and compact in overall structure and good in sealing performance; by the adoption of the heating control system and the rotation control system, automatic control over heating and rotation can be achieved; operation is easy, and working efficiency is greatly improved; the device is economical and practical; the heat energy utilization rate is high, and the remediation cost is greatly reduced.