Method for separating 1-chloro-3,3,3-trifluoropropene and hydrogen fluoride, and method for producing 1-chloro-3,3,3-trifluoropropene by using same
US-9221732-B2 · Dec 29, 2015 · US
Method for storing tetrafluoropropene and container for storing tetrafluoropropene
US10442745B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10442745-B2 |
| Application number | US-201916363657-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2019 |
| Priority date | Apr 27, 2012 |
| Publication date | Oct 15, 2019 |
| Grant date | Oct 15, 2019 |
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Abstract
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To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.
First claim
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What is claimed is: 1. A method for storing tetrafluoropropene, the method comprising: storing the tetrafluoropropene in a gaseous-liquid state comprising a gas phase and a liquid phase in a closed container, wherein the gas phase has an oxygen concentration of at least 3 vol ppm and less than 3,000 vol ppm at 25° C., and the closed container is made of at least one material selected from the group consisting of a carbon steel, a manganese steel, a chromium-molybdenum steel, a stainless steel, and an aluminum alloy. 2. The method according to claim 1 , wherein the oxygen concentration in the gas phase is at least 5 vol ppm and less than 1,000 vol ppm at 25° C. 3. The method according to claim 1 , wherein the tetrafluoropropene is 2,3,3,3-tetrafluoropropene. 4. A closed container containing tetrafluoropropene in a gaseous-liquid state comprising a gas phase and a liquid phase, wherein the gas phase has an oxygen concentration of at least 3 vol ppm and less than 3,000 vol ppm at 25° C., and the closed container is made of at least one material selected from the group consisting of a carbon steel, a manganese steel, a chromium-molybdenum steel, a stainless steel, and an aluminum alloy. 5. The container according to claim 4 , wherein the oxygen concentration in the above gas phase is at least 5 vol ppm and less than 1,000 vol ppm at 25° C. 6. The container according to claim 4 , wherein the tetrafluoropropene is 2,3,3,3-tetrafluoropropene.
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- What does patent US10442745B2 cover?
- To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at leas…
- Who is the assignee on this patent?
- Agc Inc
- What technology area does this patent fall under?
- Primary CPC classification C07C17/38. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 15 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).