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US-12017985-B2 · Jun 25, 2024 · US
Method of continuously recovering (meth)acrylic acid
US10287229B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10287229-B2 |
| Application number | US-201615752841-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 17, 2016 |
| Priority date | Dec 22, 2015 |
| Publication date | May 14, 2019 |
| Grant date | May 14, 2019 |
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Abstract
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A method of continuously recovering (meth)acrylic acid is provided. The method of continuously recovering (meth)acrylic acid according to the present disclosure enables use of a natural circulation type of reboiler which does not require an operating part in a destructive distillation process of recovering (meth)acrylic acid from a (meth)acrylic acid waste liquid, and therefore, stable operation of the continuous process may be achieved while simplifying equipment configuration.
First claim
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The invention claimed is: 1. A method of continuously recovering (meth)acrylic acid from a (meth)acrylic acid waste liquid including (meth)acrylic acid, (meth)acrylic acid dimers, and high-boiling-point by-products, wherein the recovering of (meth)acrylic acid is performed in a destructive distillation system including a distillation column including a (meth)acrylic acid waste liquid-receiving section and a distillation section at the top portion thereof, and a natural circulation type of reboiler which is connected to the distillation column and heats the liquid discharged from the lower portion of the distillation column by passing the liquid through a plurality of heat exchanger tubes to supply the liquid to the (meth)acrylic acid waste liquid-receiving section of the distillation column, and the destructive distillation system is operated such that the maximum height of the (meth)acrylic acid waste liquid in the (meth)acrylic acid waste liquid-receiving section corresponds to 85% to 100% or more of the height of the top end of the heat exchanger tube of the natural circulation type of reboiler. 2. The method of continuously recovering (meth)acrylic acid of claim 1 , wherein a temperature fluctuation width inside the heat exchanger tube which is measured at points corresponding to 25%, 50%, 75%, and 100% in the longitudinal direction of the heat exchanger tube of the natural circulation type of reboiler is 4.5° C. or less, respectively. 3. The method of continuously recovering (meth)acrylic acid of claim 1 , wherein the natural circulation type of reboiler is a vertical thermosiphon reboiler or a horizontal thermosiphon reboiler.
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- What does patent US10287229B2 cover?
- A method of continuously recovering (meth)acrylic acid is provided. The method of continuously recovering (meth)acrylic acid according to the present disclosure enables use of a natural circulation type of reboiler which does not require an operating part in a destructive distillation process of recovering (meth)acrylic acid from a (meth)acrylic acid waste liquid, and therefore, stable operatio…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification C07C51/44. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 14 2019 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).