Fluoride ion cleaning systems and methods including post-retort fluid stream processing
US-2024360564-A1 · Oct 31, 2024 · US
Method for producing high concentration aqueous HF solutions
US9309116B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9309116-B2 |
| Application number | US-201113245394-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 26, 2011 |
| Priority date | Sep 26, 2011 |
| Publication date | Apr 12, 2016 |
| Grant date | Apr 12, 2016 |
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Abstract
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Disclosed are methods used to remove HF from a fluorocarbon containing stream, thereby forming a final aqueous HF solution having both a high HF concentration and low dissolved organic content.
First claim
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What is claimed is: 1. A process for separation of HF from its mixture with a liquid fluorocarbon organic process stream, comprising the steps of: (a) a liquid fluorocarbon organic mixture containing HF is mixed with an aqueous HF solution and then subjected to phase separation into a liquid organic phase and a liquid aqueous phase; (b) the liquid organic phase, having most of its HF content extracted, is isolated; (c) the liquid aqueous phase comprises an HF solution which may contains up to about 500 ppm of dissolved organic, is sent to a multi-stage falling film exchanger where it separates the solution into (1) an overhead gas phase containing 86% wt. HF and (2) a bottom aqueous solution containing 39% wt. HF, (d) the 39% wt. HF solution is recycled to extract more HF from the incoming liquid fluorocarbon organic process stream, and the overhead gas is sent to a multi-stage absorber where water or steam is introduced to form a 50% wt. HF aqueous solution which is then isolated; and (e) wherein the vapor leaving the multistage absorber is recycled to step (a) to extract its HF content. 2. The process of claim 1 , wherein the organic content of the separated HF solution is less than about 250 ppm. 3. The process of claim 1 , wherein the organic content of the separated HF solution is less than about 150 ppm. 4. The process of claim 1 , wherein the organic content of the separated HF solution is less than about 100 ppm.
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- C01B7/195Primary
Separation; Purification · CPC title
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Frequently asked questions
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- What does patent US9309116B2 cover?
- Disclosed are methods used to remove HF from a fluorocarbon containing stream, thereby forming a final aqueous HF solution having both a high HF concentration and low dissolved organic content.
- Who is the assignee on this patent?
- Chiu Yuon, Horwath Richard Durick, Cottrell Stephen A, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C01B7/195. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 12 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).