Divalent ion removal from monoethylene glycol (MEG) feed streams
US-9469585-B2 · Oct 18, 2016 · US
Method for the preparation of 1,4-butane diol having an APHA color index of less than 30
US9975829B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9975829-B2 |
| Application number | US-201415030627-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 13, 2014 |
| Priority date | Oct 23, 2013 |
| Publication date | May 22, 2018 |
| Grant date | May 22, 2018 |
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.
Method for preparing 1,4-butanediol having an APHA color index of less than 30 by treating substance mixtures comprising 1,4-butanediol by distillation of the 1,4-butanediol in the presence of complex hydrides.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for preparing 1,4-butanediol having an APHA color index of less than 30 comprising treating a substance mixture comprising 1,4-butanediol by distillation of the 1,4-butanediol in the presence of a complex hydride. 2. The method according to claim 1 , wherein the complex hydride used is NaBH 4 . 3. The method according to claim 2 , wherein NaBH 4 is used as an aqueous alkaline solution. 4. The method according to claim 1 , wherein the distillation of the 1,4-butanediol is operated continuously. 5. The method according to claim 4 , wherein the distillation is operated using a dividing wall column. 6. The method according to claim 1 , wherein the pH of the mixture of substance mixture comprising 1,4-butanediol and hydride has a pH of 4 to 14 at a minimum water content of 10%. 7. The method according to claim 2 , wherein the pH of the mixture of substance mixture comprising 1,4-butanediol and hydride has a pH of 4 to 14 at a minimum water content of 10%.
Assignees
Inventors
Classifications
- C07C29/88Primary
by treatment giving rise to a chemical modification of at least one compound (chemisorption C07C29/76) · CPC title
Use of additives, e.g. for stabilisation · CPC title
with one or more auxiliary substances · CPC title
where at least one distillation column contains at least one dividing wall · CPC title
1,4-Butanediol; 1,3-Butanediol; 1,2-Butanediol; 2,3-Butanediol · 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 US9975829B2 cover?
- Method for preparing 1,4-butanediol having an APHA color index of less than 30 by treating substance mixtures comprising 1,4-butanediol by distillation of the 1,4-butanediol in the presence of complex hydrides.
- Who is the assignee on this patent?
- Basf Se
- What technology area does this patent fall under?
- Primary CPC classification C07C29/88. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 22 2018 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).