Reverse osmosis system
US-2024278178-A1 · Aug 22, 2024 · US
Method and apparatus for purifying alcohol
US9339766B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9339766-B2 |
| Application number | US-201214232887-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 10, 2012 |
| Priority date | Jul 15, 2011 |
| Publication date | May 17, 2016 |
| Grant date | May 17, 2016 |
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Abstract
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A method of purifying an alcohol, such as isopropyl alcohol, includes a first ion exchange step of performing ion exchange treatment on an alcohol-containing liquid; a step of performing dehydration treatment using a dehydration membrane on the liquid treated in the first ion exchange step; a distillation step of performing distillation on the dehydration-treated liquid; and a second ion exchange step of further performing ion exchange treatment on the liquid obtained in the distillation step to obtain a purified alcohol.
First claim
Opening claim text (preview).
What is claimed is: 1. An alcohol purification method comprising: a first ion exchange step of performing ion exchange treatment on an alcohol-containing liquid; a step of performing dehydration treatment using a dehydration membrane on a liquid treated in said first ion exchange step; a distillation step of performing distillation on the dehydration-treated liquid; and a second ion exchange step of further performing ion exchange treatment on a liquid obtained in said distillation step to obtain a purified alcohol. 2. The alcohol purification method according to claim 1 , wherein said second ion exchange step is a step of passing a liquid through an ion adsorption membrane. 3. The alcohol purification method according to claim 1 , further comprising a filtration step of performing filtration treatment using a microfiltration membrane on a liquid obtained in said second ion exchange step. 4. The alcohol purification method according to claim 1 , wherein the dehydration membrane containing zeolite as a material is used. 5. An alcohol purification apparatus comprising: first ion exchange means for performing ion exchange treatment on an alcohol-containing liquid; a dehydration membrane that dehydrates a liquid treated by said first ion exchange means, by pervaporation or vapor permeation; distillation means for performing a liquid dehydrated by said dehydration membrane; and second ion exchange means for further performing ion exchange treatment on a liquid obtained by said distillation means to obtain a purified alcohol. 6. The alcohol purification apparatus according to claim 5 , wherein said second ion exchange means comprises an ion adsorption membrane. 7. The alcohol purification apparatus according to claim 5 , further comprising a microfiltration membrane at a stage subsequent to said second ion exchange means. 8. The alcohol purification apparatus according to claim 5 , wherein said dehydration membrane contains zeolite as a material. 9. The alcohol purification method according to claim 2 , further comprising a filtration step of performing filtration treatment using a microfiltration membrane on a liquid obtained in said second ion exchange step. 10. The alcohol purification method according to claim 2 , wherein the dehydration membrane containing zeolite as a material is used. 11. The alcohol purification apparatus according to claim 6 , further comprising a microfiltration membrane at a stage subsequent to said second ion exchange means. 12. The alcohol purification apparatus according to claim 6 , wherein said dehydration membrane contains zeolite as a material.
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- What does patent US9339766B2 cover?
- A method of purifying an alcohol, such as isopropyl alcohol, includes a first ion exchange step of performing ion exchange treatment on an alcohol-containing liquid; a step of performing dehydration treatment using a dehydration membrane on the liquid treated in the first ion exchange step; a distillation step of performing distillation on the dehydration-treated liquid; and a second ion exchan…
- Who is the assignee on this patent?
- Takahashi Kazushige, Sugawara Hiroshi, Murayama Masami, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B01D61/58. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 17 2016 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).