Method for Preserving 1,5-Pentanediamine or Salt Thereof, Method for Preventing Discoloration of 1,5-Pentanediamine or Salt Thereof, and 1,5-Pentanediamine or Salt Thereof in Container
US-2015344405-A1 · Dec 3, 2015 · US
Method for producing 1,5-pentanediamine
US9617202B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9617202-B2 |
| Application number | US-201615048287-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 19, 2016 |
| Priority date | Aug 23, 2013 |
| Publication date | Apr 11, 2017 |
| Grant date | Apr 11, 2017 |
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Abstract
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A simple and efficient method for producing 1,5-pentanediamine in a free form is provided. The method for producing 1,5-pentanediamine in a free form from a salt of 1,5-pentanediamine includes a step of adsorbing 1,5-pentanediamine in a free form onto a column of an ion exchange resin by applying a solution of salt of 1,5-pentanediamine to the column of the ion exchange resin, and a step of eluting a solution of the 1,5-pentanediamine in a free form from the ion exchange resin by applying an eluent solution to the column of the ion exchange resin onto which the 1,5-pentanediamine in a free form is absorbed.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing 1,5-pentanediamine in a free form from a salt of 1,5-pentanediamine comprising: A) applying a solution of a salt of 1,5-pentanediamine to an ion exchange resin column in a downflow mode thereby allowing adsorption of 1,5-pentanediamine in free form onto the column; and B) applying an eluent solution to the column in an upflow mode, thereby eluting a solution of the 1,5-pentanediamine in free form from the column, wherein the eluent solution is sodium hydroxide or potassium hydroxide, wherein the salt of 1,5-pentanediamine is a hydrochloride or a sulfate. 2. The method according to claim 1 , wherein the ion exchange resin is a weakly acidic cation exchange resin. 3. The method according to claim 1 , wherein the solution of the salt of 1,5-pentanediamine has a pH of 3 to 10. 4. The method according to claim 1 , wherein the solution of the salt of 1,5-pentanediamine has a temperature of 15 to 60° C. 5. The method according to claim 1 , wherein the eluent solution has a temperature of 15 to 60° C. 6. The method according to claim 1 , wherein the eluent solution has a concentration of 0.5 N to 4 N.
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- C07C209/86Primary
Separation · CPC title
Diamines · CPC title
Purification · CPC title
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- What does patent US9617202B2 cover?
- A simple and efficient method for producing 1,5-pentanediamine in a free form is provided. The method for producing 1,5-pentanediamine in a free form from a salt of 1,5-pentanediamine includes a step of adsorbing 1,5-pentanediamine in a free form onto a column of an ion exchange resin by applying a solution of salt of 1,5-pentanediamine to the column of the ion exchange resin, and a step of elu…
- Who is the assignee on this patent?
- Ajinomoto Kk
- What technology area does this patent fall under?
- Primary CPC classification C07C209/86. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 11 2017 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).