Device comprising a cation ion-exchanger for reducing the acidity of motor oil and engine with such device
US-9212577-B2 · Dec 15, 2015 · US
Aldehyde adsorbent, method for removing aldehyde, method for producing acetic acid, and method for regenerating aldehyde adsorbent
US9662646B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9662646-B2 |
| Application number | US-201414897125-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 3, 2014 |
| Priority date | Jun 12, 2013 |
| Publication date | May 30, 2017 |
| Grant date | May 30, 2017 |
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Abstract
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An aldehyde adsorbent that can adsorb and remove aldehyde from a carboxylic acid-containing liquid is provided. The aldehyde adsorbent is an aldehyde adsorbent for adsorbing aldehyde in a carboxylic acid-containing liquid containing aldehyde, including a cation exchange resin ion-exchanged with a polyvalent amine in 1 to 99% by mol of the total exchange capacity.
First claim
Opening claim text (preview).
The invention claimed is: 1. An aldehyde adsorbent for adsorbing aldehyde in a carboxylic acid-containing liquid containing aldehyde, comprising a cation exchange resin ion-exchanged with a polyvalent amine in 40 to 80% by mol of the total exchange capacity of the cation exchange resin. 2. The aldehyde adsorbent according claim 1 , wherein the polyvalent amine is at least one selected from the group consisting of hydrazine, ethylenediamine, diethylenetriamine, triethylenetetramine and 1,3-propanediamine. 3. The aldehyde adsorbent according to claim 1 , wherein the aldehyde is at least one selected from the group consisting of acetaldehyde, propionaldehyde, butylaldehyde and condensates thereof. 4. The aldehyde adsorbent according to claim 1 , wherein the carboxylic acid is acetic acid. 5. The aldehyde adsorbent according to claim 1 , wherein the cation exchange resin is a strongly acidic cation-exchange resin. 6. A method for removing aldehyde, comprising bringing a carboxylic acid-containing liquid containing aldehyde into contact with the aldehyde adsorbent according to claim 1 to adsorb and remove aldehyde. 7. The method for removing aldehyde according to claim 6 , wherein the carboxylic acid-containing liquid containing aldehyde is at least one of process liquids produced during production of acetic acid by carbonylation of methanol and absorption liquids in which low boiling components included in a process gas produced during the production are absorbed. 8. A method for regenerating an aldehyde adsorbent, comprising contacting the aldehyde adsorbent according to claim 1 , to which aldehyde is adsorbed, with an aqueous inorganic acid solution to thereby remove aldehyde together with the polyvalent amine.
Assignees
Inventors
Classifications
by distillation · CPC title
by solid-liquid treatment; by chemisorption · CPC title
containing cationic exchangers · CPC title
- B01J39/20Primary
obtained by reactions only involving unsaturated carbon-to-carbon bonds · CPC title
by solid-liquid treatment; by chemisorption · CPC title
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- What does patent US9662646B2 cover?
- An aldehyde adsorbent that can adsorb and remove aldehyde from a carboxylic acid-containing liquid is provided. The aldehyde adsorbent is an aldehyde adsorbent for adsorbing aldehyde in a carboxylic acid-containing liquid containing aldehyde, including a cation exchange resin ion-exchanged with a polyvalent amine in 1 to 99% by mol of the total exchange capacity.
- Who is the assignee on this patent?
- Chiyoda Corp
- What technology area does this patent fall under?
- Primary CPC classification B01J39/20. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 30 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).