Drum treatment apparatus
US-2021170456-A1 · Jun 10, 2021 · US
Method for inactivating sodium metal
US2017209905A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017209905-A1 |
| Application number | US-201515313667-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 29, 2015 |
| Priority date | Jun 4, 2014 |
| Publication date | Jul 27, 2017 |
| Grant date | — |
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Abstract
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A method for cleaning a storage tank to which sodium metal is adherent, the method containing: filling, with an inert oil, the storage tank to which sodium metal is adherent; subsequently adding water, water vapor, or a humidified inert gas to the inert oil; providing a gas discharge line to the storage tank and measuring the hydrogen gas concentration in the gas discharge line; regulating the amount of the water, water vapor, or humidified inert gas to be added per hour in accordance with the level of the hydrogen gas concentration; regulating the temperature of the inert oil to 0-98° C.; and converting the sodium metal into caustic soda while changing the liquid surface level of the inert oil in parallel with addition of the water, water vapor, or humidified inert gas to the inert oil.
First claim
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1 . A method for inactivating sodium metal, comprising: immersing a sodium metal in an inert oil; and subsequently adding a moisture to the inert oil to convert the sodium metal into a caustic soda. 2 . The inactivating method according to claim 1 , further comprising changing a liquid surface level of the inert oil in parallel with the addition of the moisture. 3 . The inactivating method according to claim 1 , further comprising regulating a temperature of the inert oil to 0° C. to 98° C. 4 . The inactivating method according to claim 1 , wherein at least one of the moisture and the inert oil comprises a surfactant. 5 . A method for cleaning an apparatus to which a sodium metal is adherent, comprising: immersing, in an inert oil, the apparatus to which a sodium metal is adherent, and subsequently adding a moisture to the inert oil to convert the sodium metal into a caustic soda. 6 . A method for cleaning a storage tank to which a sodium metal is adherent, comprising: putting an inert oil in the storage tank to which a sodium metal is adherent, and subsequently adding a moisture to the inert oil to convert the sodium metal into a caustic soda. 7 . The cleaning method according to claim 5 , further comprising scraping the adherent sodium metal into the inert oil. 8 . The cleaning method according to claim 5 , wherein a hydrogen gas concentration is measured, and an amount of the moisture to be added per unit time is regulated in accordance with the measured hydrogen gas concentration. 9 . The cleaning method according to claim 5 , further comprising changing a liquid surface level of the inert oil in parallel with the addition of the moisture. 10 . The cleaning method according to claim 5 , further comprising regulating a temperature of the inert oil to 0° C. to 98° C. 11 . The cleaning method according to claim 5 , wherein at least one of the moisture and the inert oil comprises a surfactant. 12 . The cleaning method according to claim 6 , further comprising scraping the adherent sodium metal into the inert oil. 13 . The cleaning method according to claim 6 , wherein a hydrogen gas concentration is measured, and an amount of the moisture to be added per unit time is regulated in accordance with the measured hydrogen gas concentration. 14 . The cleaning method according to claim 6 , further comprising changing a liquid surface level of the inert oil in parallel with the addition of the moisture. 15 . The cleaning method according to claim 6 , further comprising regulating a temperature of the inert oil to 0° C. to 98° C. 16 . The cleaning method according to claim 6 , wherein at least one of the moisture and the inert oil comprises a surfactant.
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- What does patent US2017209905A1 cover?
- A method for cleaning a storage tank to which sodium metal is adherent, the method containing: filling, with an inert oil, the storage tank to which sodium metal is adherent; subsequently adding water, water vapor, or a humidified inert gas to the inert oil; providing a gas discharge line to the storage tank and measuring the hydrogen gas concentration in the gas discharge line; regulating the …
- Who is the assignee on this patent?
- Nippon Soda Co
- What technology area does this patent fall under?
- Primary CPC classification B08B9/083. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jul 27 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).