160 results about "Miscibility" patented technology

The present invention belongs to the technical field of oil and gas exploration and development. Disclosed are a nuclear-magnetic-resonance-based method and system for characterizing the degree of miscibility of CO2 flooding. The method comprises: on the basis of a slim tube method, testing the minimum miscible pressure of crude oil of a target oil reservoir and CO2 (S101); on the basis of the minimum miscible pressure, conducting CO2 oil displacement experiments using cylindrical cores, collecting, in real time, two-dimensional weighted nuclear magnetic resonance images and multi-component T2 spectra of a fluid in the cores varying over time and space, synchronously collecting an outlet-end fluid, and conducting a chromatographic test to obtain chromatographic test data (S102); and on the basis of the two-dimensional weighted nuclear magnetic resonance images, the multi-component T2 spectra and the chromatographic test data, performing dynamically-changing qualitative and quantitative characterization on the degree of miscibility, so as to obtain qualitative and quantitative characterization results of the degree of miscibility of CO2 and the crude oil (S103).

Extraction media for removal, concentration, and recovery of PEAS from contaminated materials in fluorous biphasic and / or multiphasic systems and related methods. The systems may include a fluorous functionalized solid support and a fluorous fractionation reactor permitting PFAS separation for targeted recovery. Extraction mediums comprise a polyelectrolyte with carbon dioxide / supercritical carbon dioxide (CO2 / SCCO2) with additional possible reagent modifiers that permit miscibility switches and compatibility with NSF / ANSI certifications. The extraction medium may include modifiers to enhance targeted recovery, such as F -solvents and / or organic carrier solvents. The disclosed systems and methods permit advantages such as 1 ) reduced sensitivity to PFAS-impacted phase co-contam inants such as competing anionic species and / or organic contaminants, 2) simple contact reactor retrofits, 3) enhanced removal of ultra- and / or short chain PFAS, 4) enhanced uniformity of matrix chemistry for downstream waste / wastewater management processes, and 5) the ability to recover valuable PFAS from waste / wastewater for processes that are dependent on their chemistry.

The invention discloses an environment-friendly degradable plastic food packaging bag and a preparation method thereof.The food packaging bag is prepared from, by weight, 90-100 parts of PBAT, 10-20 parts of PLA, 15-20 parts of antibacterial modified nano calcium carbonate, 1-2 parts of polyethylene wax and 1-2 parts of titanium dioxide, a large proportion of PBAT and a small proportion of PLA are used as base materials, and the base materials are prepared into the environment-friendly degradable plastic food packaging bag. When the component ratio difference is large, the intermolecular acting force of PBAT and PLA is stronger, the miscibility is better, the two base materials are mixed and dissolved to prepare base particles, and then the base particles are mixed and melted with other components, so that better compatibility can be achieved, and the mechanical property of the prepared degradable plastic food packaging bag is more excellent; when the antibacterial modified nano calcium carbonate is melted with other components of the plastic food packaging bag, the antibacterial modified nano calcium carbonate has better compatibility and better material fluidity during melting, meanwhile, silver of the prepared plastic bag is not easy to separate out, and the antibacterial performance of the plastic food packaging bag can be kept for a long time.

The application discloses an environment-friendly degradable plastic food packaging bag and a preparation method thereof. The food packaging bag comprises the following raw materials in parts by weight: PBAT 90-100 parts, PLA 10-20 parts, antibacterial modified nano calcium carbonate 15-20 parts, polyethylene wax 1-2 parts, and titanium dioxide 1-2 parts. PBAT and PLA are used as the base material in a large proportion and a small proportion respectively. When the component ratio is greatly different, the intermolecular force between PBAT and PLA is stronger, and the miscibility is better. The two base materials are first mixed to prepare base particles. When the base particles are mixed with other components, better compatibility is achieved. The prepared degradable plastic food packaging bag has more excellent mechanical properties. When the antibacterial modified nano calcium carbonate is melted with other components of the plastic food packaging bag, better compatibility is achieved, and the fluidity of the material during melting is better. Meanwhile, the prepared plastic bag is not easy to precipitate, and the antibacterial performance of the plastic food packaging bag can be maintained for a long time.

The invention discloses a peracetylated polysaccharide derivative mixing accelerator as well as a preparation method and application thereof, and relates to the technical field of polysaccharide derivatives. Alkyl polyglucoside and glycidyl ether are subjected to etherification reaction to obtain polysaccharide derivatives; and adding acetic anhydride and an organic weak base catalyst into the polysaccharide derivative, and carrying out esterification reaction to obtain the peracetylated polysaccharide derivative. The obtained peracetylated polysaccharide derivative can be used for reducing the minimum miscible pressure of CO2 in an offshore oilfield. The polysaccharide derivative provided by the invention is simple in synthesis process, and the molecular activity of the polysaccharide derivative can be regulated and controlled by changing the number of carbon dioxide-philic groups and the length of oleophylic unsaturated hydrocarbon chains, so that the polysaccharide derivative can be used in the CO2 oil displacement process of oilfield exploitation, and the minimum miscible pressure in the CO2 oil displacement process is effectively reduced.

The present invention relates to a subsea storage system for storing a water miscible storage fluid and methods related thereto.

Extraction media for removal, concentration, and recovery of PFAS from contaminated materials in fluorous biphasic and / or multiphasic systems and related methods. The systems may include a fluorous functionalized solid support and a fluorous fractionation reactor permitting PFAS separation for targeted recovery. Extraction mediums comprise a polyelectrolyte with carbon dioxide / supercritical carbon dioxide (CO2 / scCO2) with additional possible reagent modifiers that permit miscibility switches and compatibility with NSF / ANSI certifications. The extraction medium may include modifiers to enhance targeted recovery, such as F-solvents and / or organic carrier solvents. The disclosed systems and methods permit advantages such as 1) reduced sensitivity to PFAS-impacted phase co-contaminants such as competing anionic species and / or organic contaminants, 2) simple contact reactor retrofits, 3) enhanced removal of ultra- and / or short chain PFAS, 4) enhanced uniformity of matrix chemistry for downstream waste / wastewater management processes, and 5) the ability to recover valuable PFAS from waste / wastewater for processes that are dependent on their chemistry.

One example of a jettable antioxidant formulation is used for three-dimensional (3D) printing. The jettable antioxidant formulation includes an antioxidant blend; a surfactant, a dispersant, or a combination thereof; a water-soluble or water-miscible organic co-solvent; and water. The antioxidant blend consists of a primary antioxidant and a secondary antioxidant.

Disclosed are a CO2 gas-soluble silicon nanofluid and a preparation method therefor. The method includes: taking nano-silica and grafting a silane coupling agent to obtain modified nano-silica; taking methylsiloxane, fluorosilicone, aminosiloxane and an end-capping agent, and performing polymerization under the action of a catalyst to obtain a functionalized network siloxane; and taking the modified nano-silica and the functionalized network siloxane, uniformly mixing, then heating for a Michael addition reaction, and obtaining the gas-soluble silicon nanofluid after the reaction is completed. The gas-soluble silicon nanofluid microscopically forms a network structure with modified nano-silica as a cross-linking point and polysiloxane as a chain; macroscopically, the effect of viscosity increase of the supercritical carbon dioxide is significant, and the dissolving pressure is low. The interfacial tension and the miscibility pressure between the crude oil and CO2 are significantly reduced.

The invention relates to the technical field of soil remediation, and discloses a soil remediation material for targeted adsorption of perfluoroalkyl acid organic pollutants and a preparation method of the soil remediation material. The soil remediation material is prepared from the following raw materials: microorganisms, a porous carrier, cationic gel, anionic gel and ferrite, wherein the microorganisms have the capability of driving a nitric acid reduction-ferrous oxidation process. According to the soil remediation material provided by the invention, the microorganisms with the capability of driving the nitric acid reduction-ferrous oxidation process, the porous carrier, the cationic gel, the anionic gel and the ferrite are used as raw materials, and the mechanical strength change of the material in different application stages is dynamically regulated and controlled through the valence change of iron ions and the mineralization process of the microorganisms; according to the soil remediation material disclosed by the invention, the miscibility of the soil remediation material and soil and the specific adsorption of the medium-short-chain perfluoroalkyl acid are enhanced, and meanwhile, the conversion of pollutants from an extractable state to a non-extractable state can be promoted, so that the deep fixation of the pollutants is realized, and the secondary release risk after fixation is reduced.

An example of a fusing agent includes cesium tungsten oxide nanoparticles present in an amount ranging from about 0.01 wt% active to about 1 wt% active, based on a total weight of the fusing agent, and a liquid vehicle. The liquid vehicle includes water and a co-solvent mixture including from about 0.1 wt% active to about 10 wt% active of benzyl alcohol and from about 10 wt% active to about 40 wt% active of a co-solvent to improve miscibility between the benzyl alcohol and the water, where the wt% active of the benzyl alcohol of the co-solvent are each based on the total weight of the liquid vehicle.

The invention belongs to the technical field of composite material preparation, and discloses a green and efficient method for improving miscibility of lignin and PBAT, industrial lignin and an alcohol-based DES solvent are mixed and then subjected to low-temperature heat treatment, DES lignin is obtained after treatment, and the DES lignin and PBAT are subjected to melt blending to prepare a composite material; the composite material is prepared from the following components in parts by weight: 60-90 parts of PBAT and 10-40 parts of DES lignin, and the total part by weight of the DES lignin and PBAT is 100 parts. According to the method, the lignin with specific components is extracted from the industrial lignin by adopting a green and environment-friendly solvent, and the lignin components and the PBAT are subjected to melt blending, so that the miscibility of the industrial lignin and the PBAT is effectively enhanced by adopting a green and environment-friendly reagent, a solubilizer and an auxiliary agent do not need to be added, and the cost is reduced. The obtained lignin / PBAT composite material has higher mechanical strength than the original industrial lignin composite material.

A water-miscible functional fluid includes: a neutral photosensitizer having an isoalloxazine skeleton; and an antioxidant, wherein the antioxidant is a radical scavenger or a peroxide decomposer.

The present invention relates to an alcohol conversion process wherein a homogenous transition metal catalyst is used. The catalyst is kept in solution throughout the whole process, including the reaction in liquid phase, passing several distillation steps and an aqueous extraction step. The catalyst neither precipitates as a solid nor is solved in the wash water due to the use of a solvent or solvent mixture having a high boiling point and a specific miscibility gap regarding the wash water.

The invention relates to a method for separating taurine from a fermentation broth after fermentation of a strain-producing microorganism, comprising the following separation steps in the following order: (i) separating a fermentation supernatant by removing biomass from the fermentation broth; (ii) precipitating taurine from the fermentation supernatant by adding a water-miscible solvent 1 (e.g., ethanol); (iii) separating the taurine precipitate and dissolving it in a solvent 2 (water); (iv) crystallizing the dissolved taurine; and (v) isolating the crystalline taurine and optionally drying, wherein the isolated taurine is at a purity gt; 80% (w / w). In this way, a simple method for separating taurine prepared by fermentation with high purity is provided.

This invention relates to the field of composite fiber preparation technology, and discloses an antibacterial composite fiber and its preparation method, comprising: melting and mixing an antibacterial functional component containing matrix affinity segments and surface migration segments with a matrix polymer component; maintaining their miscibility using high shear transport; triggering phase separation of the antibacterial functional component and its migration to the surface of the fiber nascent body during extrusion to release shear force; and subsequently applying a rapid curing treatment to lock the antibacterial functional component in the surface layer. This invention utilizes the physicochemical properties between components and the control of process timing to achieve active self-assembly of functional components in fiber forming. This method can prepare composite fibers on conventional spinning equipment, achieving targeted enrichment and firm anchoring of functional components to the surface while maintaining the core mechanical properties of the matrix.

The application discloses a plasma cutting protection material, a preparation method and application thereof, and comprises the following components in parts by mass: resin 18-40 parts, toughening agent 0.1-2 parts, hydrolysis aid 0.7-4 parts, and solvent 50-100 parts. In the plasma cutting protection material, the resin is partially hydrolyzed by the hydrolysis aid, so that the hydrophilicity of the resin is enhanced, the miscibility with the solvent is improved, and a complete protection film can be formed on a wafer surface to resist etching of plasma; after the cutting process is completed, the formed protection film has extremely strong water solubility and can be easily removed, so that the cleaning process is simple.

The present invention belongs to the technical field of oil and gas exploration and development, and discloses a molecular dynamics simulation method and system for evaluating the miscibility of carbon dioxide and crude oil, including: constructing an oil and gas component model based on molecular dynamics software and conducting molecular dynamics simulation, recording the total energy of the system and the energy change inside the molecules during the simulation process, and calculating the solubility parameters of each component under different conditions in combination with the calculation formulas of cohesive energy density and solubility parameter. The miscibility between two substances is reflected by the difference in solubility parameters between the components. The present invention can quickly and accurately quantify the oil and gas miscibility under different conditions from the perspective of the energy between components, provide important parameters for evaluating the oil and gas miscibility ability, and has certain guiding significance for the efficient development of oil reservoirs.

The invention relates to a process for preparing an alkoxylated product. The aim of the invention is to provide aromatic polyols for preparing polyurethane-based and polyisocyanurate-based polymers, which ensure good miscibility with the isocyanate component and other components, have a good storage stability and render the end product flameproof. For this purpose, the invention devises a process for preparing an alkoxylated product by reacting bisphenol F with propylene carbonate and / or propylene oxide as propoxylation agent and ethylene carbonate and / or ethylene oxide as ethoxylation agent, the propoxylation agent and the ethoxylation agent being used in a molar ration of 70:30 to 45:55.

The invention relates to a wetting composition comprising (a) from 20 to less than 50 wt % of one or more C10 to C14 alcohol, (b) 25 to 70 wt % of a surfactant selected from a non-ionic, cationic, anionic and amphoteric surfactant, and (c) from 5 to 50 wt % of a polar component comprising at least one selected from (i) water, and (ii) up to 25 wt % of a water-miscible C1-C3 organic solvent, to methods for using the wetting composition, and products and aqueous compositions containing the wetting composition.

Provided is a viscous aqueous composition that has high transparency and high thickening performance, has high emulsifying power for oil-based raw material, or exerts strongly, in the case of being mixed with a water-miscible organic solvent, a viscosity retention effect.A viscous aqueous composition according to an embodiment includes (a) an anion-modified cellulose fiber including anionic groups forming salts with monoamines, and including, as the monoamines, a monoamine (A) having, in an organic conceptual diagram, an organic value of 200 or more and a monoamine (B) having an organic value of less than 200, and (b) water.

The present invention provides an acetylated surfactant for reducing the minimum miscibility pressure of CO2 miscible flooding, its preparation method and application, belonging to the technical field of CO2 enhanced oil recovery. The preparation method of the acetylated surfactant of the present invention includes the steps of: under the action of catalyst A, reacting an aqueous solution of gluconic acid and n-octanol to obtain n-octyl gluconate; under the action of catalyst B, reacting n-octyl gluconate and acetic anhydride to obtain an acetylated surfactant for reducing the minimum miscibility pressure of CO2 miscible flooding. The preparation method of the surfactant of the present invention is simple, the raw materials are cheap and widely available, green and low in cost; the obtained surfactant can interact with CO2, has high CO2 affinity, and can effectively reduce the minimum miscibility pressure of CO2 miscible flooding.

The utility model discloses a coating gasket capable of improving mutual dissolution of ceramics, which comprises a gasket body, a plurality of ceramic runner plates are arranged on the gasket body, two sides of the ceramic runner plates and the gasket body form main material slurry runners, and ceramic runners are arranged in the ceramic runner plates. A first skiving and a second skiving are arranged on the ceramic runner plate and located on the two sides of the main material slurry runner, and the second skiving is located on one side of the first skiving; and an island part is arranged between the ceramic outlet of the ceramic runner and the second thin part to separate the ceramic outlet and the second thin part. According to the coating gasket, thinning treatment is performed twice at the main material slurry outlet, so that the edge thinning uniformity after the main material slurry is coated is improved, and the problem of mutual dissolution of ceramic and the main material slurry is relieved; and height difference design and island design are carried out on a ceramic outlet of the coating gasket and the second skiving, so that the ceramic slurry is in the lower layer when the ceramic slurry and the main material slurry are in coating contact, and mutual dissolution of the ceramic overflowing into the main material slurry is further improved.

An antifungal solution, a preparation method and use thereof are provided, belonging to the technical field of medicine. The antifungal solution includes an antifungal drug and a solvent as raw materials; where the antifungal drug and the solvent are at a mass ratio of (0.1-1):(18-318); and the solvent includes an ionic liquid, an alcohol organic solvent, and water. The ionic liquid has excellent solubility, skin penetration-promoting performance, and antifungal effect; the water can destroy an original polar network of the ionic liquid, forming smaller soluble ion groups, which greatly increase a miscibility window; the alcohol organic solvent can form a cosolvent with the ionic liquid and the water, thereby helping miscibility. The antifungal solution can ensure that the drug in a system is maintained in a dissolved state, thereby improving bioavailability and ensuring better therapeutic effects while reducing dosage.

The embodiment of the invention provides an experimental device and method for describing CO2 on-way miscible phase boundary quantitative characterization, and relates to the field of oil displacement experimental equipment. Comprising a heat shrink tube, an upper clamping piece, a lower clamping piece and a pressure measuring point, the upper clamping piece and the lower clamping piece are symmetrically arranged relative to the heat shrink tube, a cavity can be formed after the upper clamping piece and the lower clamping piece are combined, and the shape of the cavity can accommodate the heat shrink tube; and the four pressure measuring points are respectively arranged on the upper clamping piece at equal intervals. A rock core can be clamped through the rock core clamping device, so that the stability during an experiment is ensured; the pressure of each part of the core holder can be detected through the pressure sensor; besides, in the experiment process, the core holder can be detected in real time through a nuclear magnetic resonance detection system, and the crude oil use amount of each position is judged by analyzing nuclear magnetic signals at different positions of the core, so that the miscible phase position of the crude oil under the condition of the purity CO2 and the crude oil physical property is judged.

The application discloses a latent aliphatic amide curing agent, a preparation method thereof and application thereof. The latent aliphatic amide curing agent is obtained through an amidation reaction of an aliphatic amine compound and a formyl carboxylic acid compound. The secondary amine group in the latent curing agent obtained by the application does not react with an epoxy resin at a low temperature due to the influence of steric hindrance, and has latency. The latent modified aliphatic amine curing agent prepared by the application is a flowable liquid at normal temperature, and can be used in combination with a traditional solid powder type latent curing agent, thereby improving the poor miscibility of the solid powder type latent curing agent with the epoxy resin.

A method for synthesizing a zirconium complex includes setting a temperature of a mixed solution at a certain temperature or more to synthesize a zirconium complex, the mixed solution being obtained by mixing: an organic solvent containing an organic substance having water miscibility; a chelating agent solution in which a chelating agent is dissolved; and zirconium dissolved in an acidic solution.

Process for preparing lifitegrast comprising : a) reacting the compound of Formula V with a chlorinating agent, in a water-immiscible organic solvent and in the presence of a base to obtain a solution of the compound of Formula V-A; b) reacting the compound of Formula IV with the solution of the compound of Formula V-A obtained in step a) in a biphasic mixture comprising an organic phase and an aqueous phase, in the presence of a base, to obtain a solution of the compound of Formula VI, wherein the compound of Formula VI is dissolved in the organic phase; c) separating the organic phase containing the compound of Formula VI from the aqueous phase of the biphasic mixture obtained in step b); d) distilling the solvent of the organic phase containing the compound of Formula VI obtained in step c) and adding a water-miscible solvent to prepare a solution of the compound of Formula VI; e ) reacting the solution of the compound of Formula VI obtained in step d) with an alkali metal hydroxide in aqueous solution to obtain the compound of Formula I-A; f ) adding an acid to the solution of the compound of Formula I-A obtained in step e ) to obtain the lifitegrast.

The invention provides a superhelical covalent organic framework material with strong circular dichroism and a preparation method thereof, and belongs to the field of nano material preparation, 2, 4, 6-triformyl phloroglucinol and a chiral monoamine inducer are dissolved in an organic solvent to obtain a mixed solution; mixing the mixed solution with aminobenzene sulfonate, adding an acetic acid aqueous solution, performing liquid nitrogen freezing-vacuumizing-unfreezing circulation for 3-5 times, sealing the reaction container, and performing constant-temperature reaction for preset time; and after the reaction is finished, collecting a solid product, washing and drying in vacuum to obtain the superhelical covalent organic framework material with strong circular dichroism. The invention provides an interface solvent thermal synthesis strategy, the reaction kinetics is accurately regulated and controlled by utilizing the high immiscibility of super-hydrophilic ionic amine in a water phase and an aldehyde monomer in an organic phase, and the chiral induction and transmission efficiency is remarkably improved. According to the method, amplification of chirality of chiral inducer molecules to mesoscale is realized, and highly ordered superhelical chiral anions COFs are prepared.

The present application relates to a method for fitting carbon dioxide miscible pressure of capillary tube experiment considering feature points. The method comprises the following steps: drawing a carbon dioxide miscible pressure chart according to the displacement experiment result; determining a BIC binary interaction coefficient according to a high-pressure miscible point, determining a relative permeability curve according to a low-pressure immiscible point, and determining a critical interfacial tension according to a miscible inflection point based on the carbon dioxide miscible pressure chart, so as to determine a fitting sequence of the low-pressure immiscible point, the miscible inflection point and the high-pressure miscible point; calculating an initial parameter of the high-pressure miscible point based on the BIC binary interaction coefficient; and fitting the oil displacement efficiency of the high-pressure miscible point by adjusting the interaction coefficient of carbon dioxide and C7+, fitting the oil displacement efficiency of the low-pressure immiscible point by adjusting the oil displacement efficiency of the relative permeability curve, and fitting the oil displacement efficiency of the miscible inflection point by adjusting the value of the critical interfacial tension, so as to fit the oil displacement efficiency value of the carbon dioxide of the capillary tube experiment.