Method for detoxifying asbestos, and treatment agent used in the method
US-2019358480-A1 · Nov 28, 2019 · US
Method for detoxifying asbestos
US10722742B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10722742-B2 |
| Application number | US-201816098418-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 6, 2018 |
| Priority date | Mar 28, 2018 |
| Publication date | Jul 28, 2020 |
| Grant date | Jul 28, 2020 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The method for detoxifying asbestos disclosed here includes: preparing an asbestos-containing substance that contains at least one type of asbestos; preparing an asbestos treatment agent that contains a mineral acid and N-methyl-2-pyrrolidone; and bringing the asbestos-containing substance into contact with the asbestos treatment agent so as to detoxify asbestos in the asbestos-containing substance. Due to this configuration, asbestos in the asbestos-containing substance can be favorably detoxified.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for detoxifying asbestos, the method comprising: preparing an asbestos-containing substance that contains at least one type of asbestos; preparing an asbestos treatment agent that contains a mineral acid and N-methyl-2-pyrrolidone; and bringing the asbestos-containing substance into contact with the asbestos treatment agent so as to detoxify asbestos in the asbestos-containing substance. 2. The method for detoxifying asbestos according to claim 1 , wherein the asbestos-containing substance contains at least chrysotile. 3. The method for detoxifying asbestos according to claim 1 , wherein the mineral acid is sulfuric acid. 4. The method for detoxifying asbestos according to claim 1 , wherein the asbestos-containing substance is brought into contact with the asbestos treatment agent for a period of 1 to 2 hours. 5. The method for detoxifying asbestos according to claim 1 , wherein the asbestos treatment agent is heated to a temperature range that is higher than 50° C. and lower than the boiling point of the treatment agent before the asbestos-containing substance is brought into contact with the asbestos treatment agent. 6. The method for detoxifying asbestos according to claim 1 , wherein the asbestos-containing substance that is brought into contact with the asbestos treatment agent is in the form of a powder. 7. The method for detoxifying asbestos according to claim 1 , wherein the concentration of the N-methyl-2-pyrrolidone is 0.1 to 10 wt % when the asbestos treatment agent as a whole is taken to be 100 wt %.
Assignees
Inventors
Classifications
Shredding, crushing or cutting · CPC title
Chemical treatment, e.g. pH adjustment or oxidation (involving an extraction step B09B3/80) · CPC title
Inorganic substances · CPC title
Organic substances · CPC title
- A62D3/36Primary
Detoxification by using acid or alkaline reagents · CPC title
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- What does patent US10722742B2 cover?
- The method for detoxifying asbestos disclosed here includes: preparing an asbestos-containing substance that contains at least one type of asbestos; preparing an asbestos treatment agent that contains a mineral acid and N-methyl-2-pyrrolidone; and bringing the asbestos-containing substance into contact with the asbestos treatment agent so as to detoxify asbestos in the asbestos-containing subst…
- Who is the assignee on this patent?
- Kokigumi Co Ltd, Nat Univ Corp Tottori Univ
- What technology area does this patent fall under?
- Primary CPC classification A62D3/36. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Jul 28 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).