Reductive preparation of tertiary dimethylamines from nitriles
US-2016368856-A1 · Dec 22, 2016 · US
Method for producing 1,4-dicyanocyclohexane, 1,4-bis(aminomethyl)cyclohexane and 1,4-cyclohexanedicarboxylic acid
US10906865B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10906865-B2 |
| Application number | US-201716337262-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 28, 2017 |
| Priority date | Oct 4, 2016 |
| Publication date | Feb 2, 2021 |
| Grant date | Feb 2, 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.
A method for producing 1,4-dicyanocyclohexane, having a step of obtaining 1,4-dicyanocyclohexane by subjecting a heated concentrate of an aqueous ammonia solution of 1,4-cyclohexanedicarboxylic acid to a cyanation reaction.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing 1,4-dicyanocyclohexane, comprising: obtaining 1,4-dicyanocyclohexane by subjecting a heated concentrate of an aqueous ammonia solution of 1,4-cyclohexanedicarboxylic acid to a cyanation reaction. 2. The method according to claim 1 , further comprising: obtaining the 1,4-cyclohexanedicarboxylic acid by subjecting terephthalic acid in an aqueous ammonia solution to a hydrogenation reaction. 3. The method according to claim 2 , wherein at least a part of an aqueous ammonia solution included in a reaction solution after obtaining 1,4-cyclohexanedicarboxylic acid is used as the aqueous ammonia solution in the obtaining of 1,4-dicyanocyclohexane. 4. The method according to claim 2 , wherein the reaction solution after the obtaining of 1,4-cyclohexanedicarboxylic acid is used as a raw material solution for the obtaining of 1,4-dicyanocyclohexane, without collecting 1,4-cyclohexanedicarboxylic acid by filtration therefrom. 5. The method according to claim 1 , further comprising obtaining the heated concentrate by heating the aqueous ammonia solution of 1,4-cyclohexanedicarboxylic acid to 100 to 200° C. to remove at least a part of water. 6. The method according to claim 3 , wherein the reaction solution after obtaining 1,4-cyclohexanedicarboxylic acid is used as a raw material solution for the obtaining of 1,4-dicyanocyclohexane, without collecting 1,4-cyclohexanedicarboxylic acid by filtration therefrom. 7. The method according to claim 2 , further comprising obtaining the heated concentrate by heating the aqueous ammonia solution of 1,4-cyclohexanedicarboxylic acid to 100 to 200° C. to remove at least a part of water. 8. The method according to claim 3 , further comprising obtaining the heated concentrate by heating the aqueous ammonia solution of 1,4-cyclohexanedicarboxylic acid to 100 to 200° C. to remove at least a part of water. 9. The method according to claim 4 , further comprising obtaining the heated concentrate by heating the aqueous ammonia solution of 1,4-cyclohexanedicarboxylic acid to 100 to 200° C. to remove at least a part of water. 10. The method according to claim 6 , further comprising obtaining the heated concentrate by heating the aqueous ammonia solution of 1,4-cyclohexanedicarboxylic acid to 100 to 200° C. to remove at least a part of water.
Assignees
Inventors
Classifications
- C07C209/48Primary
by reduction of nitriles · CPC title
The ring being saturated · CPC title
containing at least two amino groups bound to the carbon skeleton · CPC title
Completely hydrogenated benzenedicarboxylic acids · CPC title
- C07C253/22Primary
by reaction of ammonia with carboxylic acids with replacement of carboxyl groups by cyano groups · 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 US10906865B2 cover?
- A method for producing 1,4-dicyanocyclohexane, having a step of obtaining 1,4-dicyanocyclohexane by subjecting a heated concentrate of an aqueous ammonia solution of 1,4-cyclohexanedicarboxylic acid to a cyanation reaction.
- Who is the assignee on this patent?
- Mitsubishi Gas Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification C07C209/48. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 02 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).