Hydrochloric acid purification process
US-9828314-B2 · Nov 28, 2017 · US
Method for purifying 2-fluorobutane
US2016145177A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016145177-A1 |
| Application number | US-201414904486-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 16, 2014 |
| Priority date | Jul 19, 2013 |
| Publication date | May 26, 2016 |
| Grant date | — |
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Abstract
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The present invention is a method for 2-fluorobutane to obtain highly purified 2-fluorobutane through a process comprising a step for: bringing crude 2-fluorobutane that includes 5 to 50 wt % of butene into contact with a brominating agent that can form a bromonium ion in an aprotic polar solvent in the presence of water or an alcohol having up to 4 carbon atoms; converting the butene into compounds having a boiling point higher than that of 2-fluorobutane, then recovering 2-fluorbutane from the reaction solution; and purifying the recovered 2-fluorabutane by distillation.
First claim
Opening claim text (preview).
1 . A conversion method comprising bringing crude 2-fluorobutane that includes 5 to 50 wt % of butene into contact with a brominating agent that can form a bromonium ion in an aprotic polar solvent in the presence of water or an alcohol having up to 4 carbon atoms to convert the butene into compounds having a boiling point higher than that of 2-fluorobutane. 2 . The conversion method according to claim 1 , wherein the brominating agent is N-bromosuccinimide. 3 . The conversion method according to claim 1 , wherein the aprotic polar solvent has a boiling point higher than that of 2-fluorobutane by 30° C. or more. 4 . A method for purifying 2-fluorobutane comprising converting the butene into compounds having a boiling point higher than that of 2-fluorobutane using the conversion method according to claim 1 , collecting 2-fluorobutane from a reaction mixture, and purifying the collected 2-fluorobutane by distillation. 5 . The method for purifying 2-fluorobutane according to claim 4 , wherein the collecting of 2-fluorobutane from the reaction mixture includes collecting 2-fluorobutane under a reduced pressure of 10 to 70 kPa.
Assignees
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Classifications
by distillation · CPC title
- C07C17/395Primary
by treatment giving rise to a chemical modification of at least one compound · CPC title
to unsaturated hydrocarbons · CPC title
by addition of halogens · CPC title
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- What does patent US2016145177A1 cover?
- The present invention is a method for 2-fluorobutane to obtain highly purified 2-fluorobutane through a process comprising a step for: bringing crude 2-fluorobutane that includes 5 to 50 wt % of butene into contact with a brominating agent that can form a bromonium ion in an aprotic polar solvent in the presence of water or an alcohol having up to 4 carbon atoms; converting the butene into comp…
- Who is the assignee on this patent?
- Zeon Corp
- What technology area does this patent fall under?
- Primary CPC classification C07C17/395. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu May 26 2016 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).