Processes for the synthesis of 1,2,3,4-tetrachloro-hexafluoro-butane
US-2018162793-A1 · Jun 14, 2018 · US
Method for producing tetrafluoromethane
US11040931B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11040931-B2 |
| Application number | US-201816958272-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 11, 2018 |
| Priority date | Dec 28, 2017 |
| Publication date | Jun 22, 2021 |
| Grant date | Jun 22, 2021 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Fluorine gas is introduced to a raw material liquid containing a reaction inducer and a fluorinated hydrocarbon represented by CpHqClrFs (in the formula, p is an integer of 3 to 18, q is an integer of 0 to 3, r is an integer of 0 to 9, and s is an integer of 5 to 30) and having no carbon-carbon unsaturated bond to give tetrafluoromethane. The reaction inducer is a halogen-containing carbon compound liquid at room temperature and pressure and is reacted with fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas. The reaction inducer is contained at a content of more than 0% by mass and not more than 10% by mass when the total content of the fluorinated hydrocarbon and the reaction inducer contained in the raw material liquid is 100% by mass.
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 halogen-containing carbon compound liquid at room temperature and pressure selected from the group consisting of tetrachlorobutane, tetrafluorobutane, trichlorobutane, chlorobutane, dichlorobutene, chlorobutene, and chlorofluorobutene and is reacted with the fluorine gas to induce a reaction of forming tetrafluoromethane from the fluorinated hydrocarbon and the fluorine gas, and the reaction inducer is contained at a content of more than 0% by mass and not more than 10% by mass when a total content of the fluorinated hydrocarbon and the reaction inducer contained in the raw material liquid is 100% by mass. 2. The method for producing tetrafluoromethane according to claim 1 , wherein the fluorinated hydrocarbon is at least one fluorine-containing substance selected from the group consisting of a perfluorocarbon within said 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), a fluorohydrocarbon within said 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), a chlorofluorocarbon within said 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), a chlorofluorohydrocarbon within said 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 a chlorotrifluoroethylene polymer within said 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).
Assignees
Inventors
Classifications
- C07C17/361Primary
by reactions involving a decrease in the number of carbon atoms · CPC title
by depolymerisation · CPC title
containing fluorine · CPC title
- C07C17/204Primary
the other compound being a halogen · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11040931B2 cover?
- Fluorine gas is introduced to a raw material liquid containing a reaction inducer and a fluorinated hydrocarbon represented by CpHqClrFs (in the formula, p is an integer of 3 to 18, q is an integer of 0 to 3, r is an integer of 0 to 9, and s is an integer of 5 to 30) and having no carbon-carbon unsaturated bond to give tetrafluoromethane. The reaction inducer is a halogen-containing carbon comp…
- 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 Jun 22 2021 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).