Purification of recycled and renewable organic material
US-2021277324-A1 · Sep 9, 2021 · US
Apparatus and method for refining waste plastic pyrolysis oil using a separator
US11905474B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11905474-B2 |
| Application number | US-202217863875-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 13, 2022 |
| Priority date | Jul 14, 2021 |
| Publication date | Feb 20, 2024 |
| Grant date | Feb 20, 2024 |
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- Title
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Abstract
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Provided are an apparatus and a method for refining pyrolysis oil in which a dechlorination reaction is performed under a first hydrotreating catalyst. Hydrogen chloride as a by-product is removed, and then a denitrification reaction is performed under a second hydrotreating catalyst, thereby preventing production of an ammonium salt (NH 4 Cl), and providing refined oil. It is excellent in prevention of corrosion of a reactor, improvement of durability, occurrence of differential pressure, process efficiency, has very low contents of impurities such as chlorine, nitrogen, and metal and olefin, and has excellent quality.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for refining waste plastic pyrolysis oil, the method comprising: a dechlorination step of dechlorinating waste plastic pyrolysis oil with hydrogen in the presence of a first hydrotreating catalyst to produce a fluid including hydrogen chloride; a hydrogen chloride removal step of separating and removing hydrogen chloride from the fluid, wherein in the hydrogen chloride removal step, separate hydrogen is supplied to the fluid to remove hydrogen chloride, and the hydrogen chloride is removed by replacing the hydrogen chloride with the hydrogen supplied; and a denitrification step of denitrifying the fluid from which hydrogen chloride is separated under a second hydrotreating catalyst. 2. The method for refining waste plastic pyrolysis oil of claim 1 , wherein the dechlorination step is performed at a first temperature, and the denitrification step is performed at a second temperature higher than the first temperature. 3. The method for refining waste plastic pyrolysis oil of claim 2 , wherein the first temperature is 100° C. to 280° C., and the second temperature is higher than 280° C. and up to 450° C.
Assignees
Inventors
Classifications
- C10G65/04Primary
including only refining steps · CPC title
Controlling or regulating · CPC title
Impurities · CPC title
Temperature · CPC title
Pressure · CPC title
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- What does patent US11905474B2 cover?
- Provided are an apparatus and a method for refining pyrolysis oil in which a dechlorination reaction is performed under a first hydrotreating catalyst. Hydrogen chloride as a by-product is removed, and then a denitrification reaction is performed under a second hydrotreating catalyst, thereby preventing production of an ammonium salt (NH 4 Cl), and providing refined oil. It is excellent in prev…
- Who is the assignee on this patent?
- Sk Innovation Co Ltd, Sk Geo Centric Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C10G65/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 20 2024 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).