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Nitrogen-based gas sustained release agent, nitrogen-based gas sustained release body comprising same, nitrogen-based gas sustained release method using sustained release body, breathing instrument, wrapping body, and sustained release device

A slow-release agent and slow-release nitrogen technology, applied in the direction of respirators, chemical instruments and methods, medical preparations containing active ingredients, etc., can solve the problems of sustained release of inorganic solid materials and potential safety hazards, and achieve safety Excellent performance, easy operation, and excellent stability

Active Publication Date: 2021-12-07
NAT INST FOR MATERIALS SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reported examples of inorganic solid materials capable of continuously releasing low concentrations of nitric oxide at room temperature and in the atmosphere and capable of being handled safely.
For example, although the adsorption of nitric oxide on the unsaturated metal sites of porous materials (zeolite, metal-organic-framework) was proposed, the mechanism of replacing nitric oxide with water molecules in the atmosphere (ligand exchange) to release nitric oxide solid materials (non-patent document 6), but most release high concentrations of nitric oxide at the initial stage of release, which will become a safety hazard

Method used

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  • Nitrogen-based gas sustained release agent, nitrogen-based gas sustained release body comprising same, nitrogen-based gas sustained release method using sustained release body, breathing instrument, wrapping body, and sustained release device
  • Nitrogen-based gas sustained release agent, nitrogen-based gas sustained release body comprising same, nitrogen-based gas sustained release method using sustained release body, breathing instrument, wrapping body, and sustained release device
  • Nitrogen-based gas sustained release agent, nitrogen-based gas sustained release body comprising same, nitrogen-based gas sustained release method using sustained release body, breathing instrument, wrapping body, and sustained release device

Examples

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preparation example Construction

[0126] Here, among the nitrite ion / nitrate ion-containing LDH, the method for synthesizing the nitrite ion-containing LDH will be described in detail. The method for synthesizing LDH containing nitrite ions by an ion exchange method includes: preparing a layered double hydroxide and a solvent in which monovalent anions other than nitrite are included between layers; making the solvent contain nitrite ions The solution is prepared; the layered double hydroxide containing monovalent anions other than the above-mentioned nitrite ion between the layers is contacted with the above-mentioned solution; the solid substance of the LDH containing the nitrite ion synthesized by the contact The solution is separated and washed and dried.

[0127]As a layered double hydroxide (hereinafter referred to as "raw material LDH") used as a starting material in which monovalent anions other than nitrite ions are included between layers, as long as the anions can be converted by ion exchange or the...

Embodiment 1

[0300] As the carbonate-type LDH, the divalent metal ion is used as Mg ion, the trivalent metal ion is used as Al ion, and the general formula Mg 3 Al(OH) 8 (CO 3 2- ) 0.5 2H 2 Commercially available carbonic acid-type layered double hydroxide represented by O (DHT-6, manufactured by Kyowa Chemical Industry Co., Ltd., particle size distribution about 0.1 to 1 μm, Mg / Al molar ratio 2.99 (±0.06)). Hereinafter, this LDH is described as CO 3 2- MgAl-LDH3.

[0301] First, by the method described in Japanese Patent No. 5867831, carbonic acid-type LDH is converted into Cl-type LDH. Specifically, first, weigh 2.0 g of CO 3 2- MgAl-LDH3 was put into a three-necked flask, and 300 mL of ethanol was added. Next, 16.1 mL of hydrochloric acid alcohol solution (3 mass%) was added dropwise to the suspension while stirring it with a magnetic stirrer under a nitrogen flow (500 mL / min), and the mixture was stirred and reacted at 35° C. for 2 hours. Then, filtration was performed with ...

Embodiment 2

[0314] Next, use Figure 9 With the apparatus shown, a nitrogen-based gas release experiment was performed on the LDH containing nitrite ions obtained in Example 1, and the measurement was performed using a detection tube.

[0315] Figure 9 It is a schematic diagram showing the apparatus and experimental system used in Example 2.

[0316] Specifically, the powdery sample 720 (100 mg) of LDH containing nitrous acid in a glass container was sent to the atmosphere (20° C., 35% relative humidity) using a pump 710 at a flow rate of 100 mL / min for about 1 hour. After the stabilization of , various detector tubes 910 are used to measure the components in the gas after contact with the LDH containing nitrite ions. It should be noted that although the pump 710 is used to send the atmosphere (20°C, relative humidity 35%) to the LDH containing nitrite ions at a flow rate of 100mL / min, the detection tube 910 is used to suck an amount of 50mL / min as needed, The remaining 50mL / min part is...

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Abstract

[Problem] To provide: a nitrogen-based gas sustained release agent that is capable of sustained release of a nitrogen-based gas in air at ambient temperature and is safe to handle; a nitrogen-based gas sustained release body comprising the same; a nitrogen-based gas sustained release method using the sustained release body; a breathing instrument; a wrapping body; and a device for sustainably releasing a nitrogen-based gas. [Solution] This nitrogen-based gas sustained release agent contains a layered double hydroxide in which nitrite ion (NO2 -) and / or sulfate ion (NO3 -) is / are included between layers. A nitrogen-based gas sustained release body comprising the nitrogen-based gas sustained release agent is exposed to a gas containing carbon dioxide or water vapor to induce any one or more processes of sustained release of nitrous acid, self-decomposition of nitrous acid, oxidation / reduction of nitrous acid, and reduction of nitrite ion and / or sulfate ion, thereby causing sustained release of a nitrogen-based gas.

Description

technical field [0001] The present invention relates to a nitrogen-based gas slow-release agent comprising a layered double hydroxide, a method for slow-release of nitrogen-based gas using the slow-release agent, a breathing apparatus, a package, and a slow-release device using the slow-release agent. Background technique [0002] In this specification, nitric oxide (NO), nitrogen dioxide (NO 2 ), nitrous oxide (N 2 O) and dinitrogen trioxide (N 2 o 3 ) and other nitrogen oxides (NO x ), nitrogen (N 2 ) and ammonia (NH 3 ) such as inorganic molecular species that contain nitrogen atoms and are gases at normal temperature and pressure, and nitrous acid (HNO 2 ) and nitric acid (HNO 3 ) and other nitric acid vapors are collectively referred to as "nitrogen-based gases". [0003] Nitrogen oxides (NO x ) is a gas component also called Nox, which is contained in combustion gas generated by automobiles and factories, and is known to be a harmful gas that causes respirator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/00A61M16/10B01J20/04A61K33/00C01F7/784
CPCA61K33/00A61M2202/0275A61M16/12C01F7/784B01J20/041C01B21/50A61M2202/0007B01J20/04C01F7/785A61K9/0004
Inventor 石原伸辅井伊伸夫
Owner NAT INST FOR MATERIALS SCI
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