Removable Protective Coating For The Receipt Of A Dust Free Catalyst
US-2016030937-A1 · Feb 4, 2016 · US
Alkali metal-modified vanadium-phosphorus oxide (VPO) catalyst
US9931618B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9931618-B2 |
| Application number | US-201514673569-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 30, 2015 |
| Priority date | Apr 2, 2014 |
| Publication date | Apr 3, 2018 |
| Grant date | Apr 3, 2018 |
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Abstract
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The present invention relates to a catalyst containing a vanadium-phosphorus oxide and an alkali metal, wherein the proportion by weight of alkali metal in the vanadium-phosphorus oxide is in the range from 10 to 400 ppm, based on the total weight of the vanadium-phosphorus oxide, a process for producing it and also the use of the catalyst for the gas-phase oxidation of hydrocarbons, in particular for preparing maleic anhydride.
First claim
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The invention claimed is: 1. A catalyst comprising a vanadium-phosphorus oxide and an alkali metal selected from the group consisting of sodium, potassium and mixtures thereof, wherein the proportion by weight of alkali metal in the vanadium-phosphorus oxide is in the range from 10 to 400 ppm and wherein the vanadium-phosphorus oxide contains 0.10 to 0.90 w.t.-% molybdenum, based on the total weight of the vanadium-phosphorus oxide, respectively. 2. The catalyst as claimed in claim 1 , wherein the proportion of alkali metal is in the range from 80 to 300 ppm. 3. The catalyst as claimed in claim 1 , wherein the alkali metal is homogeneously distributed in the vanadium-phosphorus oxide. 4. The catalyst as claimed in claim 1 , wherein the vanadium-phosphorus oxide is present as a mixed oxide of the alkali metal, vanadium and phosphorus. 5. The catalyst as claimed in claim 1 , wherein the vanadium-phosphorus oxide is free of Zn and/or Ni. 6. The catalyst as claimed in claim , wherein the catalyst consists of the vanadium-phosphorus oxide. 7. A process for producing a catalyst as claimed in claim 1 comprising the step of reacting either a vanadium source and an alkali metal source or an alkali metal-containing vanadium source with a phosphorus source, wherein the alkali metal is selected from the group consisting of sodium, potassium and mixtures thereof, where the proportion of alkali metal is selected so that the vanadium-phosphorus oxide has a proportion by weight of alkali metal in the range from 10 to 400 ppm and wherein the vanadium-phosphorus oxide contains 0.10 to 0.90 w.t.-% molybdenum, based on the total weight of the vanadium-phosphorus oxide, respectively. 8. A catalyst for the gas-phase oxidation of a hydrocarbon comprising a vanadium-phosphorus oxide and an alkali metal, wherein the alkali metal is selected from the group consisting of sodium, potassium and mixtures thereof, wherein the proportion by weight of alkali metal in the vanadium-phosphorus oxide is in the range from 10 to 400 ppm and wherein the vanadium-phosphorus oxide contains 0.10 to 0.90 w.t.-% molybdenum, based on the total weight of the vanadium-phosphorus oxide, respectively. 9. The catalyst as claimed in claim 8 , wherein the hydrocarbon is passed over the catalyst. 10. The catalyst as claimed in claim 8 , wherein the hydrocarbon has at least 4 carbon atoms. 11. The catalyst as claimed in claim 8 , wherein the hydrocarbon is n-butane. 12. The catalyst as claimed in claim 8 , wherein maleic anhydride is formed in the (gas-phase) oxidation.
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Classifications
Phosphorising · CPC title
Vanadium · CPC title
Constitutive chemical elements of heterogeneous catalysts · CPC title
Phosphorus · CPC title
in the presence of water, e.g. steam · CPC title
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- What does patent US9931618B2 cover?
- The present invention relates to a catalyst containing a vanadium-phosphorus oxide and an alkali metal, wherein the proportion by weight of alkali metal in the vanadium-phosphorus oxide is in the range from 10 to 400 ppm, based on the total weight of the vanadium-phosphorus oxide, a process for producing it and also the use of the catalyst for the gas-phase oxidation of hydrocarbons, in particu…
- Who is the assignee on this patent?
- Cotter Thomas, Reitzmann Andreas, Mestl Gerhard, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification B01J27/199. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 03 2018 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).