Method for synthesis of lactic acid and its derivatives and catalyst for preparing same
US-2015329458-A1 · Nov 19, 2015 · US
Mixing in oxidation to phthalic anhydride
US8968671B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8968671-B2 |
| Application number | US-67339608-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 9, 2008 |
| Priority date | Sep 28, 2007 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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A system for mixing ortho-xylene with an oxygen-containing gas such as air comprises an evaporator vessel fed with the gas and having a lance projecting into the gas. The lance is provided with a metal spray nozzle for injecting droplets of hot liquid ortho-xylene into the gas stream, concurrently with the direction of flow of the gas. The metal at the surface of the spray nozzle, that in use is in contact with the liquid ortho-xylene, has a high surface hardness to resist erosion, particularly by cavitation. The system is useful in the production of phthalic anhydride by the oxidation of ortho-xylene with air, whereby the risk for deflagrations is reduced. A soft metal seal is the preferred gasket between the spray nozzle and the lance.
First claim
Opening claim text (preview).
The invention claimed is: 1. A system for mixing ortho-xylene with an oxygen-containing gas, which system comprises an ortho-xylene evaporator vessel connected to be fed with a stream of oxygen-containing gas and provided with a lance projecting into the stream of oxygen-containing gas, which lance is provided with a metal spray nozzle adapted to inject droplets of liquid ortho-xylene into the stream of oxygen-containing gas concurrently with the direction of flow of the stream of…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
- C07C67/08Primary
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
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- What does patent US8968671B2 cover?
- A system for mixing ortho-xylene with an oxygen-containing gas such as air comprises an evaporator vessel fed with the gas and having a lance projecting into the gas. The lance is provided with a metal spray nozzle for injecting droplets of hot liquid ortho-xylene into the gas stream, concurrently with the direction of flow of the gas. The metal at the surface of the spray nozzle, that in use i…
- Who is the assignee on this patent?
- De Munck Nicolaas Anthony, Oskam Aad Gerrit, Houben Johnny Jozef, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C07C67/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 03 2015 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).