19 results about "Distillation method" patented technology

This invention discloses a method for preparing high-purity Si-75, comprising: S1, adding sodium sulfide, sulfur, and deionized water in a molar ratio of 1:(1.0~1.1):(5~8) to a reaction vessel, adding a buffer, and reacting at 80~90℃ for 1~2h; S2, adding a phase transfer catalyst and a hydrolysis inhibitor to the system, adding γ-chloropropyltriethoxysilane dropwise, and reacting at 85~95℃ for 3~5h, allowing the mixture to stand and separate into layers after the reaction, to obtain an organic phase; S3, subjecting the organic phase to short-path distillation and then filtering to obtain high-purity Si-75. Compared with existing technologies, this invention uses a phosphorus-free buffer system, which simplifies waste treatment. It uses water as the reaction medium and does not use large amounts of organic solvents, making it suitable for continuous industrial production. By adding hydrolysis inhibitors, hydrolysis can be effectively prevented during the reaction, increasing safety. The short-path distillation method provides high purification efficiency and can quickly remove impurities. The product has a disulfide content of ≥98.5% and a color of 0 (Gardner color number), which is of great significance to the light-colored rubber industry.

This invention discloses an energy-saving five-tower methanol distillation method based on multi-effect thermal coupling. Crude methanol is fed to a pre-tower for distillation; the bottom product of the pre-tower is fed to an atmospheric distillation tower, the bottom product of the atmospheric distillation tower is fed to a negative pressure distillation tower, and the bottom product of the negative pressure distillation tower is fed to a pressurized distillation tower; the bottom product of the pressurized distillation tower is fed to a secondary pressure distillation tower; refined methanol is collected from the tops of the pressurized distillation tower, the atmospheric distillation tower, the negative pressure distillation tower, and the secondary pressure distillation tower; the top product of the pressurized distillation tower heats the reboiler of the secondary pressure distillation tower, and the top product of the secondary pressure distillation tower heats both the reboilers of the pre-tower and the atmospheric distillation tower; the top products of the pre-tower and the atmospheric distillation tower heat the reboiler of the negative pressure distillation tower. This process improves the heat recovery efficiency within the system, significantly reduces the condensation load of the top vapor, lowers the overall energy consumption of the distillation process, and achieves efficient multi-stage heat recovery and utilization within the system, reducing the ethanol content in the refined methanol product and improving methanol recovery efficiency.

This application discloses an automated distillation method and system for Maotai-flavor liquor based on dual-stillation collaboration, belonging to the field of Maotai-flavor liquor brewing technology. The method is implemented using a system with a dual-stillation shared detection module, an intelligent decision-making module, and a valve island control execution module. It includes first calibrating the alcohol content thresholds and process parameters for the heads, main body, and tails of the liquor according to the brewing cycle; then completing system self-checks such as pipeline cleaning and sensor calibration; scheduling dual-stillation operations based on the distillation time difference; collecting liquor parameters in real time; automatically completing the graded distillation and path switching for the heads, main body, and tails; determining distillation termination based on alcohol content and duration; supporting rotation of dual-stillation detection stations; and finally, resetting the system and archiving data. This technical solution achieves full automation and standardization of the distillation process, improves the yield and quality stability of high-quality liquor, reduces hardware investment and labor costs, avoids the subjective errors and timeliness issues caused by manual operation, and is suitable for large-scale dual-stillation production of Maotai-flavor liquor.

The present invention relates to the technical field of chemical metallurgy, and provides a method for preparing and purifying high-purity vanadium sponge. The method comprises: preparing a vertical vacuum reduction furnace, adding a reducing agent thereto, removing air from the furnace and introducing a protective gas thereinto; performing heating, adding vanadium chloride, then performing smelting, and after removal, placing same into a distillation furnace for heating and temperature-holding treatments; and finally, placing a product into a crucible in an electron beam furnace, performing evacuation, heating same to perform smelting, introducing a protective gas into the electron beam furnace after smelting, and cooling same to room temperature, so as to obtain a vanadium sponge product. In the present invention, high-purity vanadium sponge is prepared from a chloride of vanadium by means of a new metallothermic reduction-distillation method, and is further purified by means of vacuum electron beam refining. Therefore, the common technical problems of a long process, a low product purity, etc., during the preparation of high-purity vanadium metal by means of traditional methods are solved.

Title of the invention: Method for starting an air separation apparatus by cryogenic distillation. In a method for starting an air separation apparatus by cryogenic distillation, the apparatus comprises a first column (3) operating at a first pressure and a second column (5) operating at a second pressure lower than the first pressure. The second column has a tank vaporizer (4) connected to be heated by a nitrogen-enriched gas from the first column, and means for delivering an oxygen-enriched fluid to the tank of the second column, connected to a heat exchanger (6) to ensure the heating of the oxygen-enriched fluid. To start the apparatus, air is sent to the first or second column, and then liquid nitrogen is sent below the vaporizer from an external source (1). Abstract figure: Figure 1

The application provides a method for extracting metal in transformer oil by using ionic liquid and recycling the ionic liquid. Some functional groups in the ionic liquid, including halogen, hydroxyl, sulfide, urea and thiourea, can form complexes with metal ions in the transformer oil. Thus, the metal ions are extracted from the transformer oil into the ionic liquid, and the metal impurities in the transformer oil are removed. The ionic liquid is used to extract the metal in the transformer oil, so that the metal substances in the oil are reduced, and the insulation performance of the transformer oil is improved. After the metal impurities in the oil are removed, the long-term and safe operation of the transformer is ensured. After the used ionic liquid is treated by the steps of rough filtration, cation exchange resin treatment, reduced pressure distillation and evaporation crystallization, the ionic liquid can be recycled. Compared with other methods, the recovery conditions of the above steps are economical and efficient, and organic reagents are not needed, so that the application of the ionic liquid in the power system is provided.

The utility model relates to juice extraction mechanism technical field, and disclose a kind of wormwood juice extraction mechanism, including the stirring tank being arranged with broken area and stirring area, motor, pivot, broken knife, stirring rod, lifting assembly, stirring table, through hole, anti-friction gap, annular water pipe, water spray hole, enzyme solution feed pipe, feed channel, discharge channel and valve.This structure is generally not more than 60 ℃ using enzymatic method reaction temperature, can effectively extract polysaccharide, flavone etc. Non-volatile substance in wormwood juice, while avoiding long time heating and high temperature to volatile oil component structure and the destruction of heat-sensitive component, improve the quality and the integrity of component of wormwood juice extraction, while the juice rate of enzymatic method is more efficient compared with distillation method and water bath method;By setting broken area and stirring area, and broken knife, stirring rod etc. Component, the crushing of wormwood and the sufficient mixing with enzyme solution are realized, improve the efficiency and effect of enzymatic reaction.

This invention discloses a high-vacuum molecular distillation method for the fine separation of Fischer-Tropsch wax, belonging to the field of Fischer-Tropsch wax separation technology. Using stable hydrofractionation column bottom No. 1 soft wax as raw material, a continuous high-vacuum molecular distillation process is employed for multi-stage separation, including the following steps: First-stage thin-film evaporation: The raw material is fed into a first-stage thin-film evaporator and evaporated at a temperature of 170-260℃ and a vacuum of 10-100Pa. The light component is collected by condensation as refined liquid wax, and the heavy component is sent to a decolorization and filtration unit; First decolorization filtration. This invention, by setting up a continuous multi-stage separation process combining first-stage thin-film evaporation, second-stage thin-film evaporation, and third-stage short-path distillation, and using stable hydrofractionation column bottom No. 1 soft wax as a single raw material, can simultaneously separate seven Fischer-Tropsch wax products with different dropping melting points: refined liquid wax, 45# wax, 60# wax, 70# wax, 80# wax, 105# wax, and 115# wax. This significantly enriches the product range of Fischer-Tropsch wax and solves the problem of limited product range in existing technologies.

A separation system, method, and application for crude Fischer-Tropsch PAO base oil products, the separation system comprising: a storage unit for storing C8-C of the refined Fischer-Tropsch synthesis liquid phase product. 14 The process involves preparing crude Fischer-PAO base oil; a multi-stage molecular distillation unit, each stage comprising a sequentially connected molecular distillation vacuum separator, product cooler, and product storage tank. The molecular distillation vacuum separator is connected to a vacuum system. Between adjacent stages, the heavy fraction outlet of the higher-stage molecular distillation vacuum separator is connected to the feed inlet of the lower-stage unit. By employing different stages of molecular distillation methods for efficient and stable separation of crude Fischer-PAO base oil, multiple PAO products can be produced in a single step. These products can then be used as base oil feedstocks for preparing different grades of lubricating oils, enriching product diversity and achieving economic benefits.

This invention relates to a low-hydrochloric acid concentration chlorination distillation method in the germanium extraction process, belonging to the field of germanium recovery and extraction technology. An HCl solution and a chloride salt are mixed as a leachate. The leachate is then mixed with a germanium-rich raw material and subjected to chlorination distillation. After cooling, the germanium-rich distillate, HCl absorbent, and distillation residue are collected. This invention employs a chloride salt-assisted dilute acid leaching method, significantly reducing the acid concentration and acid consumption in the chlorination distillation process. Simultaneously, the germanium leaching rate can reach over 97%, and the germanium recovery rate remains at a high level, exceeding 94%.

The application provides a hydrogel, a membrane assembly and a distillation method for membrane distillation, wherein the hydrogel takes polyurethane as a support material, polyvinyl alcohol is loaded on the polyurethane, or a reaction product of polyvinyl alcohol and sodium alginate, or a reaction product of polyvinyl alcohol, sodium alginate and carboxylated carbon nanotubes. The application utilizes the interaction between water and polymer in the hydrogel to change the hydrogen bond network and the state of water, so as to reduce the water evaporation enthalpy. The permeation flux of the system is improved without increasing the energy consumption, thereby reducing the specific energy consumption of water production, optimizing the operation condition, and providing a new strategy for solving the problem of low heat utilization rate of membrane distillation.

This invention discloses an apparatus and method for recovering exhausted homogeneous catalysts by microwave-ultrasound synergistic distillation, relating to the field of exhausted homogeneous catalyst recovery technology. The apparatus includes a multi-stage distillation reaction chamber comprising a primary distillation chamber, a secondary distillation chamber, and a tertiary distillation chamber connected sequentially from top to bottom. Each of the primary, secondary, and tertiary distillation chambers is equipped with a microwave generating module and an ultrasonic oscillation module. This microwave-ultrasound synergistic distillation apparatus and method for recovering exhausted homogeneous catalysts, through a combination of microwave-ultrasound synergistic multi-field enhancement and three-stage temperature-controlled distillation, enables stepwise orderly vaporization and precise separation of alcohols, aldehydes, and high-boiling-point organic impurities in the exhausted catalyst. It solves the problems of low separation efficiency and severe component mixing in traditional single distillation methods, resulting in more thorough removal of organic impurities and higher separation purity, laying a good foundation for subsequent rhodium catalyst purification.

The application provides a supergravity distillation device and a desolidification distillation method for catalytic oil slurry, and the supergravity distillation device comprises a feeding section, a stripping section and a supergravity rectification section arranged in sequence; the supergravity rectification section is provided with a rotating shaft, at least three rotors are arranged on the rotating shaft from top to bottom, a sleeve pipe is arranged along the rotating shaft as a liquid collecting groove, and the outer ring of the sleeve pipe is provided with a filler. The supergravity distillation device can sufficiently remove the ash in the catalytic oil slurry, so that the catalytic oil slurry can be used to produce high-quality needle coke raw materials; the supergravity distillation device can simultaneously realize the fraction cutting of the catalytic oil slurry without filtering, reduces the equipment investment and the operation cost, and has a good application prospect and economic benefits.

Title: Starting Process for an Air Separation Apparatus by Cryogenic Distillation In a starting process for an air separation apparatus by cryogenic distillation, a flow of liquid oxygen (32) is sent from an external source (1, 30) to a low-pressure column (21) of a double column at a point below a vaporizer (20), while no air is simultaneously sent to the medium-pressure column (19). The flow of liquid oxygen to the low-pressure column is stopped as long as the liquid level around the vaporizer rises above a threshold, and then air to be separated is sent to the medium-pressure column. Abstract Figure: Figure 2

The application discloses a kind of solid adsorbent and its preparation method and application.The application is dissolved in anhydrous ethanol with organic amine, 10-25 ℃ is stirred and dissolved, and forms homogeneous organic amine solution;Metal ion modified porous material is added to the organic amine solution, and is fully stirred and immersed at 10-25 ℃, and the stirring time is 5-10 h, and the solid adsorbent is obtained after filtration and drying.The solid adsorbent of the application can effectively remove organic matter in wastewater, especially the adsorption efficiency of oxygen-containing organic matter such as phenol and phenethyl alcohol is higher.The application realizes the continuous operation of wastewater treatment, so that the wastewater treatment efficiency is higher;Adsorbent can be regenerated by solvent desorption, and soaking solvent can be reused by distillation method, which avoids resource waste.

This application provides an energy-saving atmospheric and vacuum five-tower distillation apparatus and method. The apparatus includes a primary distillation tower, a negative pressure tower, an atmospheric pressure tower, and a vacuum tower. The negative pressure towers include a first negative pressure tower and a second negative pressure tower. The tops of the first and second negative pressure towers are respectively connected to reflux devices for the first and second negative pressure towers. A reboiler is installed in the lower middle part of the first negative pressure tower. The pressure of the first negative pressure tower is higher than that of the second negative pressure tower. The addition of two negative pressure towers between the primary distillation tower and the atmospheric pressure tower allows for timely separation of vaporized gasoline and kerosene components, reducing the irreversibility of heating and cooling, and achieving energy saving. The negative pressure operation of the first and second negative pressure towers lowers the operating temperature within the two towers, which is beneficial for the utilization of low-grade heat in the system. This ensures that all gasoline components and some kerosene components of the crude oil are extracted before entering the atmospheric pressure tower, reducing energy consumption, improving heat utilization, and increasing the precision of crude oil separation.

Process for separating anhydrous methanesulfonic acid from a reaction mixture comprising methanesulfonic acid and sulfuric acid by distillation with at least three functional steps and the use of said methanesulfonic acid.