22 results about "Neon" patented technology

The application provides a device for coupling xenon isotope separation and neon-helium purification separation and a use method thereof. Based on various non-low-temperature gas separation technologies, through multi-stage module cooperation, high-efficiency enrichment of xenon isotope raw material gas under non-low-temperature conditions and purification and purification of air separation crude neon-helium gas are coupled, including thermal coupling and intermediate material coupling. The crude neon-helium gas produced in the process is fully utilized, the energy consumption and operation complexity are significantly reduced, and the development advantage can be further improved.

The invention belongs to the field of research and development and technical application of gas adsorption separation materials, and discloses a preparation method and application of a carbon molecular sieve neon / helium separation adsorbent. The carbon molecular sieve adsorbent is prepared by pyrolysis and carbonization of a polyimide precursor with an adjustable structure. Monomers with carboxylic acid groups are introduced in synthesis of a polyimide precursor, the molar ratio of the monomers is adjusted, the structure of the carbon molecular sieve is regulated and controlled through the pre-crosslinking effect in the subsequent carbonization process, more defect and sub-micropore structures can be formed, and therefore neon selective adsorption micropores are achieved. The obtained neon / helium separation adsorbent has the advantages of being large in neon adsorption capacity, high in neon / helium adsorption separation selectivity, good in stability and reproducibility, easy to produce on a large scale and the like, and has wide prospects in preparation of high-purity and ultra-high-purity helium and purification and separation application of electronic special gas.

The invention discloses a filling method for an atomic air chamber of an atomic clock. The method comprises the following steps: cleaning an atomic gas chamber by adopting an acetone solution, a hydrochloric acid solution and supercritical CO2 in sequence; the cleaned atomic gas chamber is put into a drying oven with ultraviolet light irradiation to be baked, and a pulse type vacuum-inert gas exchange environment is introduced into the atomic gas chamber through a connector of the atomic gas chamber, so that a passivation layer is formed on the inner wall of the atomic gas chamber; the inflation system inflates alkali metal steam and buffer gas into the cooled atomic gas chamber, the buffer gas is neon gas and carbon monoxide, and in the inflation process of the atomic gas chamber, the proportion of the neon gas and the carbon monoxide is adjusted based on the inflation amount of the alkali metal in the atomic gas chamber and the temperature of the atomic gas chamber; and sealing the atomic gas chamber under the condition that the alkali metal steam and the buffer gas in the atomic gas chamber reach set values. The problem that in the prior art, the filling precision of the atomic gas chamber is low due to the fact that the filling process of the atomic gas chamber is simple and extensive is solved.

The invention discloses a multi-productization high-purity helium purification method which comprises the following steps: S1, cooling helium feed gas containing neon gas and high-boiling-point gas to a first temperature interval, and adsorbing and removing liquefied high-boiling-point gas through a first adsorption tank to obtain helium mixed gas without the high-boiling-point gas; s2, the helium mixed gas with the high-boiling-point gas removed is cooled to a second temperature interval, neon is solidified and separated in the freezing tank, and unliquefied helium containing a trace amount of neon is output; s3, unliquefied helium containing trace neon is introduced into a second adsorption tank to adsorb residual neon, and a high-purity helium product is obtained; and S4, the solidified neon gas in the freezing tank is heated and gasified, and the recycled pure neon gas is output. According to the invention, a purification method of low-temperature freezing and multi-stage adsorption is adopted, so that the obtained product gas meets the requirement of ultra-pure helium and can also meet the use requirement of helium in the semiconductor industry, the working stages of the adsorption tank and the freezing tank can be automatically switched, and automatic control and continuous production are realized.

The invention discloses a method for crushing a sintered neodymium-iron-boron magnet through jet milling by using neon. Firstly, magnet coarse particles subjected to hydrogen decrepitation treatment are placed in a jet mill grinding chamber, then neon flowing at a high speed is introduced, powder particles are further crushed and enter a sorting device by adjusting the neon flowing speed and the ventilation time, particles larger than the specified size return and continue to be crushed, powder smaller than the specified size is separated, and particles with too small sizes are removed; and finally, powder with the particle size of 2.5-4 microns is obtained. Compared with a traditional airflow milling method using nitrogen, the neon gas is adopted, the powder particle size is successfully controlled within the ideal single domain critical size range, and meanwhile the powder flowability and the filling density are improved. The process compatibility and the forming efficiency of the magnetic powder in the subsequent magnetic field orientation and pressing forming process are remarkably improved, the nitridation reaction of rare earth elements is avoided due to the chemical inertness of neon, the nitrogen content of the magnetic powder is remarkably reduced, and a foundation is laid for obtaining a magnet with better performance.

A neon purification device according to the present invention comprises: a first adsorption unit that adsorbs and removes nitrogen and argon from a raw material gas; a cooling unit that cools the raw material gas from which nitrogen and argon have been adsorbed and removed by the first adsorption unit to obtain a cooling gas; and a second adsorption unit that adsorbs and removes one or both of nitrogen and argon from the cooling gas.

Provided is an insulating gas replacement method that can sufficiently achieve the effect of preventing global warming and that can efficiently execute replacement of insulating gas. This insulating gas replacement method comprises a recovery step (ST10), an encapsulation step (ST20), and an atmospheric pressure test step (ST30), and involves replacing a first insulating gas in a gas insulated switchgear (100) with a second insulating gas (20) having a global warming potential lower than that of the first insulating gas (10). In the recovery step, the first insulating gas is recovered from the interior space of a sealed tank (101). In the encapsulation step, the second insulating gas is introduced and encapsulated in the interior space of the sealed tank from which the first insulating gas has been recovered. In the atmospheric pressure test step, an atmospheric pressure test is executed on the gas insulated switchgear. The second insulating gas comprises at least one substance selected from oxygen, carbon dioxide, nitrogen, helium, neon, argon, xenon, and krypton. The recovery step, the encapsulation step, and the atmospheric pressure test step are each executed at a location where the gas insulated switchgear is installed.

A system is provided, including an analyzer that analyzes components contained in a gas. The analyzer includes: a filter configured to pass components contained in the gas selectively; a detector configured to detect components that have passed through the filter; and a first control apparatus configured to set the filter so that the detector detects, as neon that is a main component included in the gas, an isotope 21Ne that has a low abundance ratio in place of an isotope 20Ne that has a high abundance ratio.

Provided is a system (100) having an analysis device (1) for analyzing components contained in a gas (9). This analysis device is provided with: a filter (25) through which components contained in a gas selectively pass; a detector (26) that detects the component that has passed through the filter; and a first control device (36) configured so that the detector (26) detects a low-abundance isotope (21Ne), which is neon as the main component contained in the gas, and does not detect a high-abundance isotope (20Ne).

The application discloses a helium purification method capable of preventing catalyst poisoning, and comprises the following steps: cooling raw material gas until the impurity gas with liquefaction temperature equal to or higher than nitrogen is liquefied, and obtaining intermediate product gas containing neon, hydrogen and helium through gas-liquid separation; and low-temperature adsorption of neon in the intermediate product gas to obtain mixed gas, wherein the impurity gas contains nitrogen; and hydrogen in the mixed gas is removed by using a catalyst to obtain helium product, wherein at least one first type of gas capable of poisoning the catalyst exists in the impurity gas. The application can eliminate the risk of explosion, does not need external gas, simplifies the process and improves safety. Temperature optimization of the catalytic reaction can improve the hydrogen removal rate and the catalyst life, and the extraction of high-purity hydrogen and neon as byproducts can increase resource utilization, and break the limitation of traditional processes.

A neon purification device according to the present invention comprises: an adsorption unit that adsorbs and removes nitrogen from a mixed gas containing neon, helium, and nitrogen; a separation unit that separates and removes helium from the nitrogen-removed gas from which nitrogen has been adsorbed and removed by the adsorption unit; and a regeneration gas introduction line that can introduce a separation gas containing helium separated and removed by the separation unit into the adsorption unit as a regeneration gas for regenerating the adsorption capacity of the adsorption unit.

To provide a neon purification device and a neon purification method that are able to efficiently purify neon from a gas containing neon, nitrogen, and helium.SOLUTION: A neon purification device according to the present invention comprises: an adsorption unit that adsorbs and removes nitrogen from a mixed gas containing neon, helium, and nitrogen; a separation unit that separates and removes helium from the nitrogen-removed gas obtained by the adsorption unit adsorbing and removing nitrogen; and a regeneration gas introduction line that can introduce a separation gas containing helium separated and removed by the separation unit into the adsorption unit as a regeneration gas for regenerating the adsorption capacity of the adsorption unit.SELECTED DRAWING: Figure 1

An analyzer and method for on-line detection of trace neon in high-purity helium and ultra-pure helium, the analyzer comprises: a first switch valve, a purification device, a plasma emission detector, a signal acquisition system, a display device and a second switch valve, the first switch valve is used for controlling gas supplied to the purification device, the purification device is used for removing impurities except inert gas, and the plasma emission detector is used for detecting the trace neon in the high-purity helium and ultra-pure helium. The plasma emission detector uses an optical filter which allows light of 585 nanometers, 632 nanometers and 640 nanometers of characteristic peaks of a neon plasma emission spectrum to pass through, the second switch valve is connected with the plasma emission detector and used for controlling gas exhausted from the plasma emission detector, and the signal acquisition system is used for acquiring signals from the plasma emission detector. The display device is used for displaying analysis results of the signals. Therefore, carrier gas and a chromatographic column do not need to be used for separating gas impurities, the real concentration of neon in the sample gas can be directly reflected, the detection limit can reach 10 ppb or below, and the sensitivity is high.

A system (100) having an analysis device (1) that analyzes a component contained in a gas (9) is provided. The analysis device has a filter (25) that selectively passes the component contained in the gas, a detector (26) that detects the component that has passed through the filter, and a first control device (36) configured so that the detector (26) detects a low-abundance isotope 21Ne that is a main component, i.e., neon, contained in the gas and does not detect a high-abundance isotope 20Ne.

The invention relates to the technical field of crude helium purification, and discloses a crude helium purification method and system based on high hydrogen content, the system comprises a first-stage adsorption unit, a second-stage adsorption unit and a regeneration unit, an adsorber in the first-stage adsorption unit is provided with a first-stage adsorbent, the first-stage adsorbent is selected from cocoanut active charcoal and a modified nano material, and the second-stage adsorption unit is provided with a second-stage adsorbent; the particle size of the coconut shell activated carbon is 4-6 mm, the aperture of the nano material is 0.3-0.8 nm, the temperature is controlled to be 80-110 K, and hydrogen, nitrogen and argon are adsorbed and removed; a second-stage adsorbent is arranged in a second-stage adsorber of the second-stage adsorption unit, the temperature is controlled to be 20-30 K, and modified coconut shell activated carbon is selected as the second-stage adsorbent to adsorb and remove neon; according to the system, the purification of crude helium is divided into two stages, only physical adsorption purification is carried out, the operation of the system is more stable, and the regeneration unit is used for carrying out heating vacuumizing replacement on a primary adsorbent or a secondary adsorbent; the system can circularly purify the crude helium, and the purity of the helium can reach 99.9999% or above.

The application relates to a process device and method for preparing high-purity high-abundance neon-22 isotope laser gas, which comprises a natural neon gas raw material storage tank, a first-stage thermal diffusion separation column, a second-stage to (N-1)-stage thermal diffusion separation column, an N-stage thermal diffusion separation column and a low-temperature adsorption tower connected in series, wherein the thermal diffusion separation column is used for separating and enriching neon isotopes; based on the thermal diffusion effect difference of neon-22 isotopes and other isotope components, the abundance of neon-22 isotopes is enriched. After multi-stage thermal diffusion separation, neon-22 isotopes with an abundance of 99% to 99.99% are obtained at the end of the (N-1)-stage thermal diffusion separation column, and neon-22 isotopes with a purity of 99.99% to 99.999% are prepared. Compared with the prior art, the application significantly improves the abundance of neon-22 isotopes, and based on the demand for high-purity laser gas for laser gyro navigation, the neon-22 isotopes are deeply purified, that is, neon-22 isotope laser gas with an abundance of 99% to 99.99% and a purity of 99.99% to 99.999% is obtained.

A feed gas comprising neon, nitrogen and helium is cooled to a first temperature in a heat exchange system to produce a two-phase mixture, which is introduced into a first phase separator and separated into a nitrogen-rich liquid and a first gaseous crude neon stream. The pressure of at least a portion of the nitrogen-rich liquid is reduced, and the at least a portion of the nitrogen-rich liquid is vaporized in the heat exchange system to produce a portion of refrigeration therein. The first gaseous crude neon stream is introduced into a first adsorber which removes impurities such as nitrogen. The gaseous crude neon stream is further cooled to a second temperature. A portion of the cooling load may be from the heat exchange system and another portion may be from a cryogenic cooler to produce a two-phase flow. The two-phase stream is separated in a second phase separator into a crude helium vapor stream and a crude neon liquid stream, the crude neon liquid stream being introduced into a distillation column to produce a discharge stream containing helium impurities and a pure liquid neon product. The pure liquid neon product is vaporized in the heat exchange system to produce refrigeration and produce a pure gaseous neon product.

The application discloses a kind of microporous metal organic framework materials and preparation and rare gas separation method, belong to chemical adsorption separation technical field, microporous metal organic framework material is made of divalent metal ion, heterocyclic dicarboxylic acid ligand and nitrogen-containing heterocyclic ligand coordination construction;Divalent metal ion and heterocyclic dicarboxylic acid ligand coordination forms two-dimensional polymer, nitrogen-containing heterocyclic ligand as pillar, by with two-dimensional polymer coordination forms three-dimensional framework structure.Microporous metal organic framework material is used as adsorbent, and is contacted with rare gas mixed gas phase, realizes to high polarity rare gas identification capture, reaches the separation and purification of rare gas.The present application realizes the accurate control of pore chemistry electrostatic environment by changing different ligand and its functional group substituent, so as to realize the selective separation of xenon / krypton and helium / neon and other rare gas.

The invention belongs to the technical field of gas separation, and particularly relates to an adsorbent for removing neon in helium and a preparation method and application thereof.The preparation method comprises the steps that an aluminum source, sodium hydroxide and water are mixed and then stirred, then a template agent and a silicon source are added, stirring is conducted, and hydrogel is obtained; carrying out crystallization treatment on the hydrogel, and carrying out filtering, washing and drying treatment to obtain chabazite; the silica-alumina ratio of the chabazite is 3-5; the method comprises the following steps: carrying out ion exchange on chabazite and a metal salt solution, filtering, washing and drying to obtain the adsorbent. The adsorbent provided by the invention has a regular microporous structure and a strong electric field adsorption site, shows high selectivity and adsorption capacity for neon gas, and can realize removal of trace neon from helium gas.

The present invention provides a neon purification apparatus and neon purification method that can improve the efficiency of neon purification. [Solution] The neon purification apparatus according to the present invention comprises a first adsorption unit that adsorbs and removes nitrogen and argon from a raw material gas, a cooling unit that cools the raw material gas from which nitrogen and argon have been adsorbed and removed in the first adsorption unit to obtain a cooling gas, and a second adsorption unit that adsorbs and removes one or both of nitrogen and argon from the cooling gas.

To provide a neon purification device and a neon purification method that are able to efficiently purify neon from a gas containing neon, nitrogen, and helium.SOLUTION: A neon purification device according to the present invention comprises: an adsorption unit that adsorbs and removes nitrogen from a mixed gas containing neon, helium, and nitrogen; a separation unit that separates and removes helium from the nitrogen-removed gas obtained by the adsorption unit adsorbing and removing nitrogen; and a regeneration gas introduction line that can introduce a separation gas containing helium separated and removed by the separation unit into the adsorption unit as a regeneration gas for regenerating the adsorption capacity of the adsorption unit.SELECTED DRAWING: Figure 1

The invention provides a device for coupling xenon isotope separation and neon and helium purification and separation and a use method thereof, which are based on multiple non-low-temperature gas separation technologies, realize coupling of efficient enrichment of xenon isotope raw material gas and purification of air separation crude neon and helium under a non-low-temperature condition through cooperation of multiple stages of modules, including thermal coupling and intermediate material coupling, and realize high-efficiency enrichment of xenon isotope raw material gas and purification of air separation crude neon and helium under a non-low-temperature condition. Crude neon and helium generated in the process are fully utilized, energy consumption and operation complexity are remarkably reduced, and the development advantage can be further improved.