A method for producing a high-purity hydrogen chloride gas comprises performing a purification process that includes the steps 1) to 3) below on a byproduct hydrogen chloride gas: 1) a crude hydrochloric acid generation step of allowing water to absorb the byproduct hydrogen chloride gas; 2) a volatile organic impurity-removed hydrochloric acid generation step of bringing the crude hydrochloric acid obtained in the step 1) into contact with an inert gas at a liquid temperature of 20 to 45 C. to dissipate volatile organic impurities; and 3) a high-purity hydrogen chloride gas generation step of supplying the volatile organic impurity-removed hydrochloric acid obtained in the step 2) to a distillation column and performing distillation under conditions of a column bottom temperature of higher than 60 C. and 108 C. or lower and a column top temperature of 60 C. or lower to distill out a high-purity hydrogen chloride gas.

An object of the present invention is to provide an oxygen isotope concentration method and an oxygen isotope concentration apparatus that can safely and stably supply ozone without increasing the size of the device. The present invention provides an oxygen concentration method including: a photoreaction step of irradiating a first mixed fluid (F1) in which oxygen and a diluent substance (DS) are mixed with a laser, selectively decomposing ozone containing an oxygen isotope, and generating oxygen containing an oxygen isotope, and obtaining a second mixed fluid (F2) in which the oxygen, the ozone, and the diluent substance (DS) are mixed; a liquid storage section introduction step of introducing the second mixed fluid (F2) into a liquid storage section (10) and liquefying it; and a separation step of introducing the second mixed fluid (F2) with hydraulic head obtained by liquefying the second mixed fluid (F2) and storing it in the liquid storage section (10), into a separation column (21), distilling the second mixed fluid (F2) which has liquefied, and separating into a third mixed fluid (F3) in which ozone and the diluent substance (DS) are mixed, and product oxygen (PO) in which oxygen isotope heavy components are concentrated; wherein the liquid storage section (10) can store the liquefied second mixed fluid (F2) without being affected by heat input.

A device and a method for producing hydrogen and byproduct oxygen by using green electricity electrolyzed water are provided. The device comprises an oxygen purifying system, a heat exchange system, an air separation compression and expansion system, an air separation rectification system and a liquid oxygen storage system. The method comprises the following steps: first, purifying oxygen prepared by electrolyzing water by green electricity to remove impurities such as hydrogen, carbon monoxide, carbon dioxide and water in the oxygen, then feeding the pure oxygen into the heat exchange system, performing heat exchange liquefaction to obtain liquid oxygen, coupling the liquid oxygen generated by rectification of the air separation rectification system, and obtaining pressurized oxygen through the heat exchange system and the air separation compression and expansion system.

An oxygenating system for treating an atmosphere of a magnetic storage device can include an oxygenating material inside a sealed casing of the magnetic storage device and comprising an oxygenated salen of formula (I):

##STR00001##

where M can be a metal selected from Co, Ni, Mn, Fe or Cu, and R1, R2, R3, R4, R5, R6, R7 and R8 are independently substitutions on aromatic and ethylene diamine portions such as, but not limited to, H, F, Cl, Br, I, carbonyl, carboxyl, hydroxyl, alkyl, aryl, amine, amide, nitro, or other typical electron withdrawing groups or electron donating groups.

Integrated plants and associated processes for producing ammonia and sulfuric acid have been developed comprising air separation and water electrolysis subsystems and which make surprisingly efficient use of the products from these subsystems (i.e. oxygen and nitrogen from the former and hydrogen and oxygen from the latter). The invention is particularly suitable for use as part of an integrated fertilizer production plant.

Disclosed is a system developed for obtaining high purity (minimum 99.999%) nitrogen gas in nitrogen gas purification applications and drying obtained nitrogen gas before applying it on areas of use, and to an operating method of the system.

A system and method of ultra-high purity (UHP) oxygen production from an argon and oxygen producing cryogenic air separation unit incorporating a dedicated methane rejection column or column section having a liquid to vapor (L/V) ratio lower than the L/V ratio in the associated argon rectifier is provided.

An oxygenating system for treating an atmosphere of a magnetic storage device can include an oxygenating material inside a sealed casing of the magnetic storage device and comprising an oxygenated salen of formula (I): ##STR00001##
where M can be a metal selected from Co, Ni, Mn, Fe or Cu, and R1, R2, R3, R4, R5, R6, R7 and R8 are independently substitutions on aromatic and ethylene diamine portions such as, but not limited to, H, F, Cl, Br, I, carbonyl, carboxyl, hydroxyl, alkyl, aryl, amine, amide, nitro, or other typical electron withdrawing groups or electron donating groups.

An integrated industrial unit is provided, which can include: a nitrogen source comprising an air separation unit that is configured to provide pressurized gaseous nitrogen and liquid nitrogen; a hydrogen source; a hydrogen liquefaction unit, wherein the hydrogen liquefaction unit comprises a precooling system, and a liquefaction system; and a liquid hydrogen storage tank, wherein the precooling system is configured to receive the gaseous hydrogen from the hydrogen source and cool the gaseous hydrogen to a temperature between 70K and 100K, wherein the precooling system comprises a primary refrigeration system and a secondary refrigeration system, wherein the liquefaction system is in fluid communication with the precooling system and is configured to liquefy the gaseous hydrogen received from the precooling system to produce liquid hydrogen, wherein the liquid hydrogen storage tank is in fluid communication with the liquefaction system and is configured to store the liquid hydrogen received from the liquefaction system.

A device for separating and sequestrating carbon dioxide coupled with cold storage in mixed gas via hydrate method, which belongs to the technical field of application of natural gas hydrates includes a gas compression device, a refrigeration cycle device, a hydrate formation/decomposition device, a hydrate cold storage device, a water circulation device and a sensing and monitoring device; taking the separation and sequestration of biogas as an example, the refrigeration cycle device enables the cooling of biogas, decomposition of gas at all levels, hydrate, and circulating water to provide the low-temperature conditions required for hydrate formation; the hydrate cold energy storage device can fully use the latent heat of hydrate phase change to provide the required cooling capacity on the user side; the water circulation device can realize the recycling of decomposition water to ensure the continuous formation of hydrate.