Azeotropic or azeotrope-like composition, and method for producing 2,3,3,3-tetrafluoropropene or chloromethane
US-9023233-B2 · May 5, 2015 · US
Method for purifying tetrafluoropropene
US9302964B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9302964-B2 |
| Application number | US-201514749877-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 25, 2015 |
| Priority date | Dec 27, 2012 |
| Publication date | Apr 5, 2016 |
| Grant date | Apr 5, 2016 |
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.
To provide a method for efficiently separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and chloromethane (R40) from a composition containing HFO-1234yf and R40. A method for separating HFO-1234yf containing substantially no R40, which comprises bringing an azeotropic composition or azeotrope-like composition of H FO-1234yf and R40 into contact with a specific extraction solvent.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing 2,3,3,3-tetrafluoropropene, the method comprising contacting an azeotropic composition or azeotrope-like composition of 2,3,3,3-tetrafluoropropene and chloromethane with an extraction solvent to obtain 2,3,3,3-tetrafluoropropene containing substantially no chloromethane. 2. The method according to claim 1 , wherein as the extraction solvent, at least one compound selected from the group consisting of a hydroca…
Assignees
Inventors
Classifications
Chemistry & Metallurgy · mapped topic
- C07C17/386Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9302964B2 cover?
- To provide a method for efficiently separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and chloromethane (R40) from a composition containing HFO-1234yf and R40. A method for separating HFO-1234yf containing substantially no R40, which comprises bringing an azeotropic composition or azeotrope-like composition of H FO-1234yf and R40 into contact with a specific extraction solvent.
- Who is the assignee on this patent?
- Asahi Glass Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C07C17/386. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 05 2016 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).