154results about How to "High mass and heat transfer efficiency" patented technology

An industrial process for reclaiming the waste acid in the production of titanium white powder by sulfuric acid method features that the waste acid is concentrated by fume and then by steam. Its advantages are high efficiency, low cost, and no environmental pollution.

The invention relates to a continuous production method for amino end-capped polyether. The method comprises the following three continuous phases of: (1) a pre-treatment phase: dehydrating and drying a polyether raw material, proportionally mixing with hydrogen and liquid ammonia to form a mixed material, and heating to a reaction temperature; (2) a reaction phase: putting the mixed material into a tubular reactor, contacting with a porous nickel-based catalyst filled into the tubular reactor, and undergoing a hydro-ammoniation reaction under the action of the catalyst; and (3) a post-treatment phase: cooling a product generated in the reaction phase, introducing into a gas-liquid separating device, separating ammonia gas and hydrogen gas from a liquid product, filtering the separated liquid, and drying to obtain a finished product. The continuous production method has the advantages of realization of continuous production of aminopolyether, high mass transfer and heat transfer efficiencies, high reaction speed, mild reaction condition, reduction in side reactions, safety and reliability. The catalyzing efficiency of the catalyst is high, and the production efficiency and the conversion rate of the product are effectively increased.

The invention provides a negative pressure strengthened multi-stage laminated disc type solar energy distillation system for desalination, which takes solar energy as a heat source to heat brackish water in laminated discs, and under the negative pressure chimney effect of a vacuum pump, the multi-stage cyclic utilization of condensation heat and evaporation heat between the multi-stage laminated discs is realized, the heat transfer efficiency is increased, and pure distilled water can be obtained with less energy consumption. The system has the advantages of compact structure, small floor area, and low cost for water preparation, and is suitable for desalinating brackish water in western villages and small towns.

The invention provides a preparation method for high-dispersion nano silicon dioxide. The method comprises the following steps of: providing acidy liquor and a microporous membrane; preparing a certain amount of silicate liquor, wherein the silicate liquor contains a surfactant, so that the silicate liquor flows along the surface of the microporous membrane; vertically adding the acidy liquor into flowing silicate liquor through the microporous membrane; enabling the acidy liquor and the silicate liquor to generate reaction at a certain temperature to generate silicon dioxide precipitates; and treating the silicon dioxide precipitates to obtain the high-dispersion nano silicon dioxide. The method for preparing the silicon dioxide is low in cost, controllable in process and simple; and the prepared silicon dioxide particle is moderate in specific surface area, uniform in particle diameter distribution and good in dispersion.

The invention which relates to the field of structured fillers concretely relates to a cheap and high efficiency rectification filler and a preparation method thereof. The filler which is suitable for a rectification operation under a temperature of less than 300 DEG C is formed by stacking filler unit plates with corrugated shapes, the filler unit plates are foamed resin-based filler unit plateswith three-dimensional connected network structures, the foam pore sizes are between 10PPi and 80PPi, and the volume fraction is controlled between 10% and 80%. A plurality of the filler unit plates are stacked, the filler unit plates of the odd-numbered layers have a consistent channel direction, and the filler unit plates of the even-numbered layers have a consistent channel direction, and an angle between the channel direction of the filler unit plates of the odd-numbered layers and the channel direction of the filler unit plates of the even-numbered layers is 30-170 DEG; a corrugation angle between a corrugation parallel direction and a vertical direction of a filler disc is 15-85 DEG, corrugations of adjacent filler unit plates have a same angle and opposite directions; and the filler unit plates are bonded after being stacked, and are subjected to a heat treatment to obtain the filler. The foamed resin-based structured filler unit plates of the invention allows the three-dimensional network connectivity characteristic of a polyurethane foamed plastic template to be kept, and has the characteristics of large specific surface area, thin wall, cheapness, high chemical stabilityand the like.

The invention provides a nickel-based catalyst, a preparation method thereof and a method for catalyzing methane cracking to produce hydrogen. The catalyst includes a nickel-based composite metal oxide with a general formula shown as xX.yA.zB.(100-x-y-z)M, wherein X is Ni and /or its oxide, A is an auxiliary metal component, B is an assistant metal component, and M is a carrier. The method for catalyzing methane cracking to produce hydrogen includes: contacting methane-containing feed gas with the catalyst in a high density circulating fluidized bed reactor, and carrying out catalytic cracking reaction to obtain hydrogen containing product-gas and a deactivated catalyst, performing separation in a settler, letting the catalyst carry carbon deposit to enter a regenerator for regeneration, thus obtaining regenerated flue gas containing CO or synthetic gas, and letting the regenerated catalyst enter the reactor again. The heat generated by regeneration supplies the energy need of the whole system to realize self-heating operation. The method provided by the invention can realize large-scale continuous production of hydrogen at low price, and can effectively reduce energy consumption and save the production cost.

The invention provides a method for synthesizing lenalidomide, belongs to the field of anti-tumor and anti-leukemia medicines in organic synthesis, and particularly relates to the method for synthesizing lenalidomide. To solve the problems of low yield, low purity, environmental pollution caused by massive harmful waste, excessive cost for environment-friendly treatment, easily occurred risk of violent explosive, degradation caused by long reacting time at high temperature and low catalyst recycling frequency in a traditional lenalidomide synthesis reaction, the method comprises the following steps: 1, adding a lenalidomide precursor nitro compound into an organic solvent, adding an activated carbon catalyst having a Pd loading capacity of 10 percent, then leading the mixture serving as a material I into a pre-heating module of a microchannel reactor; and 2, respectively pumping preheated material I and a material II hydrogen into a reaction module of the microchannel reactor into a reactor, collecting outflowing reaction liquid, and treating to obtain the lenalidomide. The method is environment-friendly, and has the advantages of high reaction yield, high purity and good economical efficiency.

The invention relates to a method for continuously producing prothioconazole by utilizing a micro-channel reactor and a micro-channel system and belongs to the technical field of organic synthesis processes. The method comprises the following steps: taking 2-(1-chloro-cyclopropyl)-1-(2-chlorphenyl)-3-hydrazino-propyl-2-ol as a raw material, carrying out a cyclization and oxidization two-step reaction in the micro-channel reactor so as to continuously complete a preparation process of prothioconazole, introducing the material into the micro-channel reactor by a metering pump, performing preheating, mixed reaction and quenching crystallization separation so as to obtain the product prothioconazole. According to the method, mass transfer and heat transfer in the reaction process can be enhanced, the reaction temperature and reaction time are accurately controlled, side reactions and a reactant auto-polymerization phenomenon caused by material enrichment in the cyclization process are avoided, and conditions that the side reactions are increased due to 'temperature runaway' and reactive oxygen species overflow in the oxidization process and the like are also avoided. The reaction timeis finally reduced, the atom utilization ratio is improved, the reaction conversion rate is greatly improved, and production of solid wastes and side reactions is reduced.

The invention provides a three-dimensional film spraying and perforating tray belonging to the field of mass transfer and heat transfer equipment in chemical engineering. The three-dimensional film spraying and perforating tray comprises a tower body and a tower plate arranged inside the tower body, and spraying covers arranged on the tower plate. The three-dimensional film spraying and perforating tray is characterized in that a plurality of fixing holes are formed in the tower plate, a guide cylinder is fixed in each fixing hole, a liquid seal trough is arranged at the outer ring of the side wall of each guide cylinder, a gas raising hole is formed at the bottom of each liquid seal trough and is concentric with each fixing hole, the spraying cover is arranged at the inner ring of the side wall of each guide cylinder, the lower end face of the side wall of each spraying cover is welded with the bottom of each liquid seal trough, a plurality of spraying holes are formed in the side wall of each spraying cover, a top cover is arranged at the top of each spraying cover, a liquid receiving trough is arranged at the upper end of each spraying cover, the side wall of each guide cylinder is coaxially connected with the outer wall of each spraying cover and the side wall of each liquid seal trough, gaps are reserved between the side wall of each guide cylinder and the outer wall of each spraying cover and between the outer wall of each spraying cover and the side wall of each liquid seal trough, and a gap is reserved between each top cover and each spraying cover. According to the three-dimensional film spraying and perforating tray, by adopting a perforating technology, on the one hand, the problem caused by liquid streaming and mixing is solved, and on the other hand, the gas-liquid contact time is increased and through perforation, and thus the mass transfer efficiency is increased.

The invention provides a separation and recycle system for water-containing organic waste liquid and organic solvents as well as a recycle method, wherein the separation and recycle system consists ofa distillation system and a pervaporation membrane separation system through process pipeline connection. A packed tower is adopted as a rectifying tower, and the material inlet of the packed tower is arranged in the center of a packed tower liquid distributor. A damping structure is arranged in the pervaporation membrane unit of the pervaporation membrane separation system. The separation and recycle system provided by the invention is suitable for online dehydration and recycle of multiple kinds of water-containing and two or more than two azeotropic or non-azeotropic organic solvents as well as for separation and reuse of the organic solvents.

The invention provides a baffled multistage disc distiller enhanced by externally adding a negative pressure. Bitter in a disc is heated by utilizing a heating pipe at the bottom; one side of the distiller is provided with a steam lifting flow channel, and a large amount of steam is evaporated below a boiling point through negative pressure suction of a vacuum pump; after pumping, condensation is carried out so as to obtain fresh water, thereby achieving the effect of salt-water separation. The distiller can also be externally connected with a solar heat collector for heat supply, thereby greatly saving energy consumption.

The invention discloses a method for preparing a Remdesivir key intermediate by using a micro-channel reaction device, comprising the following steps of: (1) adding 7-iodopyrrolo [2, 1-f] [1, 2, 4] triazine-4-amine into an organic solvent, and adding trimethylchlorosilane to obtain a mixed solution as a first material; taking an organic mixed solution of phenyl magnesium chloride and isopropyl magnesium chloride. magnesium chloride as a second material; adding 2, 3, 5-tri-O-benzyl-D-ribose-1, 4-lactone into an organic solvent to be used as a third material; (2) respectively pumping the first material and the second material into a first micro-mixer of a micro-channel reaction device at the same time, mixing, and introducing into the first micro-reactor for reaction; and (3) pumping an effluent of the first micro-reactor and the third material into a second micro-mixer of the micro-channel reaction device at the same time, mixing, introducing into the second micro-reactor for reaction,and collecting an effluent, thereby obtaining the product.

The invention relates to the field of organic synthesis, in particular to a method for continuously synthesizing hydroquinone dihydroxyethyl ether by a micro-channel reactor. Hydroquinone and ethylene oxide are used as raw materials, a catalyst is added into a hydroquinone diluent, the two raw materials are controlled by a metering advection pump to be synchronously input into a micro-channel reaction system, the volume flow of hydroquinone and ethylene oxide is regulated and controlled, reaction liquid reacts in a reaction unit of a micro-channel, and hydroquinone dihydroxyethyl ether is obtained. According to the method, the hydroquinone dihydroxyethyl ether is synthesized by adopting a micro-channel continuous process, so that rapid heating can be realized, the liquid holdup is small, the safety is high, and the flammable and combustible risk of ethylene oxide with relatively high initial concentration in the rapid heating process in an intermittent process can be avoided.

The invention provides a stone coal vanadium ore cascade oxidizing roasting vanadium extraction system and an oxidizing roasting method. The system comprises a feeding system, a discharging system and a vanadium extraction system, wherein the feeding system is composed of a stock bin, a weightlessness scale and a spiral feeding pipe; the material circulating heat storage system consists of a primary cyclone separator, a flow sealing valve, a main furnace and a secondary cyclone separator; the stepped oxidizing roasting system consists of a decarburization roasting reactor, a crystal breaking roasting reactor and an ore discharge heat exchange pipe; the negative pressure dust removal system consists of a three-stage cyclone separator, a dust hopper, a bag-type dust remover, a Roots blower and a chimney; the decarburization roasting reactor and the crystal breaking roasting reactor are connected in series, so that the purpose of segmented suspension roasting of materials can be achieved; in addition, the system comprises a four-stage heat exchange process and a first-stage self-heating utilization process, and the overall energy utilization rate is extremely high, so that the stepped oxidation roasting system has the advantages of independent and controllable two-stage roasting, full gas-solid contact, high energy utilization rate, high mass and heat transfer efficiency, low operation cost, high efficiency, environmental protection and the like.

The invention relates to the field of chemical separation and recovery, in particular to a rectifying and recovering device and a method for rectifying and recovering acetone in acetone water solutionby the device. A reserved cavity with the height of 1m-2m is formed between the upper portion of a gas distributor and a bottommost tower plate in a tower kettle of the device, and a filler layer with the height of 0.3m-0.8m is arranged in the reserved cavity and made of metal regular fillers. According to the rectifying method, the acetone water solution with acetone mass concentration of 4%-60%is rectified, and the mass reflux ratio of a rectified object is 0.85-1.2. According to the device, the filler layer is reasonably arranged by the aid of limited reserved space between the gas distributor and the bottommost tower plate, the shortcoming of mass and heat transfer of the gas distributor can be overcome, gas-liquid contact conditions of the tower kettle are improved, and the dosage of heating steam can be decreased.

The invention discloses a method for preparing a nano aluminum/porous copper oxide nano thermite through P4VP self-assembly. The method is divided into two stages: in the first stage: adopting Cu (NO3)2.H2O and urea to obtain a copper oxide precursor, enabling the copper oxide precursor to be subjected to high-temperature calcination to obtain flaky porous copper oxide, and then physically mixing the porous copper oxide and nano aluminum powder to obtain an nAl/pCuO energetic composite material; and the second stage is a P4VP self-assembly stage: preparing a P4VP isopropanol solution, then adding nano aluminum powder for ultrasonic dispersion, then adding the porous copper oxide suspension while stirring, finally performing ultrasonic dispersion on the nano aluminum powder and copper oxide again, and performing suction filtration and washing on the suspension to obtain the nAl/pCuO@P4VP nano thermite. According to the prepared nano thermite, the agglomeration phenomenon among the components is reduced, the contact area between the nano aluminum powder and the copper oxide is greatly increased, and the improvement of energy release and reaction performance of the nano thermite is promoted.

The invention relates to the technical field of conversion and utilization of biomass energy, in particular to an ex-situ catalytic pyrolysis liquefaction system for biomass. The ex-situ catalytic pyrolysis liquefaction system comprises a gasifier, a riser heater, a rotating cone reactor, a flow-guide cyclone reactor, a catalyst regeneration system, a gas-solid separator and a condensation system,wherein the bottom of the gasifier is connected with a first biomass feeder, and the upper part of the gasifier is connected with the lower part of the riser heater; a quartz sand feeder is connectedwith the lower part of the riser heater; the upper part of the riser heater is connected with an inlet of a quartz sand separator; the lower part of the quartz sand separator is connected with a heated sand box which is connected with an inlet of the rotating cone reactor; an outlet of the rotating cone reactor is connected with a gas inlet of the flow-guide cyclone reactor through a gas pipe; the flow-guide cyclone reactor is connected with a catalyst box at the upper part through catalyst inlets. An ex-situ catalytic pyrolysis process is performed on biomass with the system, operation is convenient and controllable, and working condition parameters in a pyrolysis process and a catalytic cracking process can be adjusted and controlled respectively.