Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

64 results about "Flash Freeze" patented technology

Flash freezing refers to the process whereby objects are frozen in a few hours by subjecting them to cryogenic temperatures, or by direct contact with liquid nitrogen at −196 degrees Celsius.

Method and apparatus for using frozen carbon dioxide blocks or cylinders to recover oil from abandoned oil wells

A method and apparatus for enhanced oil recovery comprising separating CO2 gas from coal or flue emissions of a power plant, and flash freezing the CO2 gas with super chilled air, to form frozen CO2 ice blocks or cylinders, wherein the CO2 blocks or cylinders can then be inserted into an abandoned oil well, and the CO2 can be allowed to warm up and change phase to a gas, which enables the CO2 gas to mix with the oil, and helps reduce the viscosity of the oil and allows it to flow more freely, so that it can be pumped out using conventional equipment. A first application comprises having top and bottom valves and the CO2 blocks or cylinders being allowed to change phase to a gas while inside the injection pipe, to increase the pressure therein, such that, by opening the bottom valve, pressurized jets of CO2 gas can be released into the oil, causing the oil to mix vigorously with the carbon dioxide gas, and reduce the viscosity thereof. A second application comprises allowing the CO2 cylinders or blocks to drop into the oil itself, wherein the relatively warm oil causes the frozen CO2 to change phase to a gas, which causes violent gas bubbles to form that vigorously mix with the oil, which helps reduce the viscosity of the oil so it flows more freely through the reservoir.
Owner:ENIS BEN M +1

Preparation method and application of modified thin-wall hierarchical porous carbon for lithium-sulfur battery

The invention relates to a lithium-sulfur battery technology, and aims to provide a preparation method and application of modified thin-wall hierarchical porous carbon for a lithium-sulfur battery. According to the invention, sodium chloride is taken as a template, water-soluble transition metal salt is taken as a modifier, water-soluble glucose thiourea resin is taken as a carbon source, and themodified thin-wall porous carbon forming nano sulfide on a carbon wall is obtained through freeze drying, calcination and water washing through flash freezing of a mixed solution, coordinated with transition metal, of a glucose thiourea prepolymer and sodium chloride. The modified thin-wall hierarchical porous carbon has the characteristics of large specific surface area and large pore volume, andcan bear more metal lithium. The thin wall endows the hierarchical porous carbon with pore deformation capability and high strength, so the capability of bearing puncture of lithium dendrites is improved. Gas is used to passivate the surface of metal lithium, thereby facilitating improving of the production efficiency and improving of the passivation effects and consistency. The dispersed sulfidehas strong affinity to polysulfide ions, is beneficial to adsorption of the polysulfide ions and inhibition of shuttling of the polysulfide ions, and is suitable for preparation of a high-performancesulfur electrode material.
Owner:ZHEJIANG UNIV

Preparation method of easy-to-activate high-carrying-capacity lithium sulfide carbon composite material and application of preparation method

The invention relates to a lithium battery technology, and aims to provide a preparation method of an easy-to-activate high-carrying-capacity lithium sulfide carbon composite material and an application of the preparation method. The method comprises the steps: taking glucose thiourea resin, obtained through polymerization of glucose and thiourea, as a carbon source, and after the glucose thiourearesin and a lithium sulfate mixed solution are subjected to spray drying, obtaining carbon-coated lithium sulfate through calcination; mixing the mixture with the glucose thiourea resin solution again after ball milling and crushing, carrying out flash freeze drying to obtain a precursor, and performing the calcining to obtain a secondary carbon-coated in-situ synthesis high-carrying-capacity lithium sulfide/carbon composite material. A product prepared by the method has the characteristics of large specific surface area and large pore volume, and the carbon thin wall endows the pores with the deformability, thereby improving the volume expansion generated by lithium sulfide formed by lithium sulfide intercalation in the discharge bearing process. The method effectively inhibits the escape of polysulfide ions, and improves the conductivity. The method effectively improves the activation performance of the lithium sulfide electrode, improves the capacity and the preparation safety of the negative electrode, and is particularly suitable for production of high-capacity lithium sulfide batteries.
Owner:ZHEJIANG UNIV

Novel medicament for treating cardio-cerebrovascular diseases and preparation method

InactiveCN102793734AAchieving a good effect of treating both symptoms and root causesFully absorbedAnthropod material medical ingredientsMetabolism disorderDiseaseFreeze-drying
The invention relates to a novel medicament for treating the cardio-cerebrovascular diseases and a preparation method and belongs to the technical field of preparation of the novel medicament for treating the cardio-cerebrovascular diseases. According to the invention, blood-sucking leeches, panax pseudoginseng and earthworm are used as raw materials. According to the invention, by a special preparation process of carrying out liquid nitrogen flash freezing, low-temperature superfine grinding and freeze drying before sterilization on the raw materials, the grinding fineness can reach 1 to 10 micrometers, the active ingredients of the blood-sucking leeches can be stored to the greatest extent, the active ingredients can be sufficiently adsorbed by a patient, and the novel medicament has comprehensive effects of promoting circulation, removing stasis, resisting to coagulation, reducing the pressure, lowering lipid, resisting to platelet aggregation and dissolving thrombi and is safe and reliable to take. The invention solves the problems that an existing medicament which uses leeches as the raw materials and is used for treating the cardio-cerebrovascular diseases adopts non blood-sucking leeches as the medicine and adopts a conventional grinding method, so that the antithrombase effect is poor and the curative effect is influenced; and enteric capsules only adopt the single medicine of blood-sucking leech and have poor effects of reducing the pressure, lowering the lipid and dissolving the thrombi and the preparation process ensures the active ingredients of the leeches not to be completely stored and is unbeneficial for a patient to adsorb the active ingredients.
Owner:龚元

Preparation method of hydrophilic modification hollow carbon for lithium electrode and sulfur electrode material

The invention relates to a lithium-sulfur battery technology, and aims to provide a preparation method of hydrophilic modification hollow carbon for a lithium electrode and sulfur electrode material.According to the preparation method, KOH-NaOH mixed alkali is used as a template, a transition metal ligand solution is obtained by employing transition metal nitrate and melamine ligand, a precursoris obtained by flash freezing of a coordination compound, glucose and the mixed alkali solution, an intermediate product comprising transition metal coordination graphite carbon nitride is obtained byfreezing, drying and medium-temperature calcination, the hydrophilic modification hollow carbon loaded with a transition metal oxide is obtained by high-temperature calcination, reaction of diluted hydrochloric acid and cleaning, filtering and drying of deionized water and is used for loading metal lithium and sulfur as an electrode material of a lithium-sulfur battery. Hollow carbon with hydrophilic inner surface and outer surface is obtained and has the characteristics of large specific area and large pore volume, and more lithium or sulfur can be loaded; formation of metal lithium ion holeduring charging is guaranteed by the transition metal oxide dispersed and distributed on an inner wall of carbon, and dendritic crystal of the metal lithium is prevented.
Owner:ZHEJIANG UNIV

Preparation method of polypyrrole quantum dots and sodium-sulfur battery diaphragm

The invention relates to the technical field of sodium-sulfur batteries, and aims to provide a preparation method of polypyrrole quantum dots and a sodium-sulfur battery diaphragm. The preparation method comprises the following steps: adding a pyrrole solution and the DMSO solution of ferric nitrate into a solvent thermal reaction kettle together, and uniformly stirring; carrying out solvothermalreaction at the temperature of 180 DEG C for 0.5-5 h and cooling to the room temperature to obtain a DMSO solution containing the polypyrrole quantum dots. According to the preparation method, the high strength and high heat resistance temperature characteristics of PBO resin are utilized, so that the safety and reliability of a sodium-sulfur battery are greatly improved by taking the diaphragm asa raw material. Directional branch-shaped pore channels are obtained through flash freezing pore-forming, and sodium ion transmission is facilitated. The polypyrrole quantum dots are beneficial to long-chain polysulfide adsorption, the polysulfide adsorption capacity of the diaphragm is improved, a medium polysulfide concentration gradient is established in the diaphragm, the content of sodium ions is increased, the internal impedance of the sodium-sulfur battery is reduced, growth of sodium dendrites is passivated so as to prevent the sodium dendrites from penetrating through the diaphragm,the possibility that the sodium dendrites are in contact with the positive electrode in a charging and discharging process is eliminated, and short-circuiting of the battery is prevented.
Owner:ZHEJIANG UNIV

Quick-frozen mango fruit product and preparation technology thereof

The invention discloses a quick-frozen mango fruit product and a preparation method thereof. The preparation method comprises the following steps of (1) selecting raw materials: selecting 70%-80% ripened yellow-skin mangoes which are plump in fruits, thick in flesh quality, free from stains and scars, and free from insect damages; (2) performing washing: performing washing by clean water, removingbacteria and other impurities on outer skin of the selected mangoes, and performing airing; (3) performing bacterium removal: performing physical bacterium removal by high-pressure ion flow sterilization equipment, and performing airing; (4) performing skin removal and kernel separation: removing mango fruit tips (mango fruit tails) and mango fruit heads (mango fruit stems: the taste of the mangofruit stems is astringent, and the mango fruit stems are sensitive areas), performing skin removal under the low-temperature condition by mechanical equipment, and performing kernel separation underthe low-temperature condition by the mechanical equipment, so as to obtain chopped mango flesh; (5) performing pulping, performing homogenizing and performing deoxidizing: making the obtained choppedmango flesh into mango pulp by a pulping machine, performing homogenizing treatment under the low-temperature condition, performing deoxidizing treatment under the low-temperature condition, and performing standing; (6) performing flash freezing and quick freezing: performing flash freezing and quick freezing on the sterilized mango fruit product under minus 60-minus 80 DEG C by liquid nitrogen for shaping;, and (7) performing low-temperature storing: quickly transferring the quick-frozen mango fruit product to a cold storage storeroom of which the temperature is minus 25-minus 35 DEG C, so asto obtain the finished products. Through the adoption of the preparation method disclosed by the invention, the quick-frozen mango fruit product is mushy and soft in mouth feel, pure in flavor and bright yellow in color.
Owner:刘志华 +2

Diaphragm capable of preventing lithium dendrites and rechargeable lithium battery

The invention relates to the technical field of lithium batteries, and aims to provide a diaphragm capable of preventing lithium dendrites and a rechargeable lithium battery. The preparation method comprises the following steps: ultrasonically dispersing dimethyl sulfoxide and PBO resin, and pouring the dimethyl sulfoxide and the PBO resin on flat glass for flash freezing to form a film; performing freeze vacuum drying to remove the solvent to obtain a PBO diaphragm; adding THF, lithium sulfide and elemental sulfur under the protection of argon; after raising the temperature for reaction, filtering to obtain a lithium polysulfide solution; adding the PBO diaphragm into the lithium polysulfide solution under the protection of argon for dipping; and washing and drying to obtain the lithium polysulfide doped dendritic microporous diaphragm. According to the invention, the safety and reliability of the rechargeable lithium battery are greatly improved, and directional dendritic pore channels are obtained through flash freezing and pore forming, so that lithium ion transfer is facilitated. The content of lithium ions in the film is increased, the internal impedance of the lithium battery is reduced, the growth of lithium dendrites in the film is passivated, the lithium dendrites are greatly prevented from penetrating through the diaphragm, the possibility of contact between the poly-lithium dendrites and the positive electrode in the charging and discharging process is eliminated, and the short circuit of the battery is prevented.
Owner:ZHEJIANG UNIV

Aquatic product low-temperature refrigeration device and method

The invention discloses an aquatic product low-temperature refrigeration device and method. The device comprises a flash-freezing solution, a refrigeration pool, an ultrasonic-assisted refrigeration system, a quick start module, a refrigeration unit and a hoisting machine, wherein the whole refrigeration pool has an annular shape, one half of the refrigeration pool is a pre-cooling pool, and the other half of the refrigeration pool is a freezing pool; the ultrasonic-assisted refrigeration system comprises an ultrasonic generator and an ultrasonic transducer; the refrigeration unit comprises asingle-stage compression-type refrigerator and a cascade refrigerator, and an evaporator pipeline of the single-stage compression-type refrigerator is arranged on the outer wall of the pre-cooling pool; and an evaporator pipeline of the cascade refrigerator is arranged on the outer wall of the freezing pool. According to the device, cold energy can be sufficiently recycled and utilized, so that the starting time and starting energy consumption of the refrigeration device can be greatly reduced; low-frequency ultrasonic intermittent working assisted refrigeration is adopted, the super-cooling degree of cell tissues of an aquatic product can be reduced, generation of large ice crystals in the cell tissues of the aquatic product can be inhibited, the structure of the cell tissues of the aquatic product can be protected, and the aquatic product can be quickly frozen with high quality.
Owner:江苏麦克诺菲生物科技有限公司

Polystyrene nano zero-valent iron composite material and preparation method and application thereof

The invention discloses a polystyrene nano zero-valent iron composite material and a preparation method and application thereof and belongs to the field of organic macromolecular material synthesis. According to the composite material, a liquid-phase reduction method is adopted, nano zero-valent iron is loaded into porous polystyrene pellets obtained by means of a flash freezing method, polystyrene is firstly dissolved in a certain quantity of an organic solvent to obtain a polystyrene solution, and then the polystyrene solution is dropwise added into liquid nitrogen containing another solid organic solvent; liquid nitrogen slowly volatilizes, the solvent slowly melts along with the temperature rise of a system, an organic solvent in original polystyrene is replaced to obtain the porous polystyrene pellets, and the porous polystyrene pellets are soaked in a high-concentration iron-containing solution and then taken out to be soaked in a methanol solution of sodium borohydride; by repeating the operation above several times, the polystyrene nano zero-valent iron composite material is obtained. The material prepared by the method has the advantages of high stability and activity, great separation capacity in water, excellent catalytic degradation performance on water pollutants, high in mechanical strength, environmentally friendly and the like.
Owner:NANJING NORMAL UNIVERSITY

LC-MS/MS method for detecting IPP, GPP, FPP and GGPP in fresh tobacco leaf

The invention provides an LC-MS/MS method for detecting IPP, GPP, FPP and GGPP in a fresh tobacco leaf. The LC-MS/MS method comprises the following steps: 1) preparing an extraction solvent; 2) conducting liquid nitrogen flash freezing on the fresh tobacco leaf, and conducting freeze drying and crushing; 3) adding the extraction solvent to the crushed sample, and conducting ultrasonic extraction at low temperature; 4) carrying out refrigerated centrifugation, taking supernatant, and filtering; 5) conducting LC-MS/MS method to detect IPP, GPP, FPP and GGPP in the detected sample. The LC-MS/MS method has the advantages that the pretreatment method of the sample is simple and only comprises ultrasonic extraction and filtration; compared with the existing method, the method is high in sensitivity, good in precision, and high in recovery of standard addition; the sample can be directly fed and analyzed through filtration, but according to the methods in the existing documents, the pretreatment method is complicated and time-consuming, and requires pyrophosphatase and alkaline phosphatase for carrying out biochemical reaction on the sample. Therefore, the LC-MS/MS method disclosed by the invention can effectively increase the analysis efficiency, and is suitable for analysis of the ultralow content target in the complex substrate.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC

Vacuum freeze drying orange membrane peeling technology

The invention relates to a vacuum freeze drying orange membrane peeling technology. The vacuum freeze drying orange membrane peeling technology comprises the steps of orange grading, blanching peel removing, sectioning, enzymolysis membrane removing, sterilizing and lastly vacuum freeze drying. The step of vacuum freeze drying sequentially comprises the steps of single freezing, secondary disc laying, quick freezing and drying, wherein according to the single freezing, cleaned orange segments are arranged at the temperature equal to or lower than -18 EDC C for quick freezing for 1 to 1.5 hours, and the temperature of the materials is maintained between -5 DEG C to -10 DEG C; according to the secondary disc laying, disc laying is carried out on the single frozen orange segments in an operation chamber at the low temperature equal to or lower than -5 DEG C, and evenness and the consistence of the thickness of disc laying are ensured; then according to quick freezing, the condition that fast freezing is carried out for 4 hours at the temperature equal to or lower than 35 DEG C serves as the quick freezing condition; then, quick frozen oranges are arranged in a vacuum drying furnace, heating and heat preservation are carried out by steps, the temperature of the materials is equal to or lower than 60 DEG C, and the vacuum degree is equal to or lower than 60 Pa; heating is finished, cooling is carried out, and then the orange segments are sorted, detected and packed.
Owner:SHANGHAI LVSHENG IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products