Difluorocarbene radiosynthesis
US-2024383827-A1 · Nov 21, 2024 · US
Method for producing tetrafluoromethane
US11220471B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11220471-B2 |
| Application number | US-201816962943-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 25, 2018 |
| Priority date | Jan 19, 2018 |
| Publication date | Jan 11, 2022 |
| Grant date | Jan 11, 2022 |
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Abstract
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Provided is a method for producing tetrafluoromethane, and the method is unlikely to damage a reaction apparatus and can produce tetrafluoromethane safely, inexpensively, and stably. To a raw material liquid (1) containing a reaction inducer and a fluorinated hydrocarbon represented by chemical formula CpHqClrFs (in the chemical formula, p is an integer of 3 or more and 18 or less, q is an integer of 0 or more and 3 or less, r is an integer of 0 or more and 9 or less, and s is an integer of 5 or more and 30 or less) and having no carbon-carbon unsaturated bond, fluorine gas is introduced to give tetrafluoromethane. The reaction inducer is a hydrocarbon polymer solid at normal temperature and pressure and is reacted with fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing tetrafluoromethane, the method comprising: introducing fluorine gas to a raw material liquid containing a reaction inducer and a fluorinated hydrocarbon represented by chemical formula C p H q Cl r F s (in the chemical formula, p is an integer of 3 or more and 18 or less, q is an integer of 0 or more and 3 or less, r is an integer of 0 or more and 9 or less, and s is an integer of 5 or more and 30 or less) and having no carbon-carbon unsaturated bond, wherein the reaction inducer is a hydrocarbon polymer solid at normal temperature and pressure and is reacted with the fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas. 2. The method for producing tetrafluoromethane according to claim 1 , wherein the reaction inducer is contained at a content of more than 0% by mass and not more than 1% by mass where a total content of the fluorinated hydrocarbon and the reaction inducer contained in the raw material liquid is 100% by mass. 3. The method for producing tetrafluoromethane according to claim 2 , wherein the hydrocarbon polymer is at least one polymer selected from polyethylene, polypropylene, polystyrene, and paraffin. 4. The method for producing tetrafluoromethane according to claim 1 , wherein the fluorinated hydrocarbon is at least one fluorine-containing substance selected from a perfluorocarbon, a fluorohydrocarbon, a chlorofluorocarbon, a chlorofluorohydrocarbon, and a chlorotrifluoroethylene polymer. 5. The method for producing tetrafluoromethane according to claim 2 , wherein the fluorinated hydrocarbon is at least one fluorine-containing substance selected from a perfluorocarbon, a fluorohydrocarbon, a chlorofluorocarbon, a chlorofluorohydrocarbon, and a chlorotrifluoroethylene polymer. 6. The method for producing tetrafluoromethane according to claim 3 , wherein the fluorinated hydrocarbon is at least one fluorine-containing substance selected from a perfluorocarbon, a fluorohydrocarbon, a chlorofluorocarbon, a chlorofluorohydrocarbon, and a chlorotrifluoroethylene polymer.
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Classifications
- C07C17/361Primary
by reactions involving a decrease in the number of carbon atoms · CPC title
containing fluorine · CPC title
- C07C17/367Primary
by depolymerisation · CPC title
the other compound being a halogen · CPC title
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- What does patent US11220471B2 cover?
- Provided is a method for producing tetrafluoromethane, and the method is unlikely to damage a reaction apparatus and can produce tetrafluoromethane safely, inexpensively, and stably. To a raw material liquid (1) containing a reaction inducer and a fluorinated hydrocarbon represented by chemical formula CpHqClrFs (in the chemical formula, p is an integer of 3 or more and 18 or less, q is an inte…
- Who is the assignee on this patent?
- Showa Denko Kk
- What technology area does this patent fall under?
- Primary CPC classification C07C17/361. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 11 2022 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).