US5053580A
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Metal oxide powders, their mixtures, metal mixed oxide powders, their mixtures and their use in catalytic dehydrogenation of hydrocarbons
Assignee: Veba Oel AG
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Filing: 1990-05-07
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Granted: 1991-10-01
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Expires: 2010-05-07
Abstract
Abstract Metal oxide powders comprised of Cr(III) oxide, Ti(IV) oxide, V(V) oxide, or mixtures of these, or metal mixed oxides comprised of Cr(III) oxide and Ti(IV) oxide and V(V) oxide, or their mixtures. They have BET surfaces of 5-50m 2 /g and mean particle diameters of 25-350 nm and are useful to increase conversion and selectivity in the manufacture of mono-olefins by catalytic dehydrogenation of saturated hydrocarbons. The metal oxide powders are produced from mixtures of the vaporized metal compounds chromyl chloride, titanium tetrachloride, and vanadyl chloride, in the presence of certain gases by laser pyrolysis.
Inventors
- 👤 Bernhard Schramm
- 👤 Jurgen Kern
- 👤 Harald Schwahn
- 👤 August-Wilhelm Preuss
- 👤 Klaus Gottlieb
- 👤 Hartmut Bruderreck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:57
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J37/00; B01J37/02; B01J37/0238; B01J37/34; B01J37/349; B01J35/00; B01J35/60; B01J35/61; B01J35/613
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A method which comprises catalytically dehydrogenating branched or unbranched, saturated or unsaturated hydrocarbons having 2-6 carbon atoms, or mixtures of such hydrocarbons, at a temperature of 300°-700° C. and a pressure of 0.1-20 bar, in the presence of a metal oxide powder comprising Cr (III) oxide, Ti (IV) oxide, V (V) oxide, or mixtures thereof, having a BET surface area of 5-50 m 2 /g and a mean particle diameter of 25-350 nm, having been prepared by continuous laser pyrolysis at a pressure of 10-1000 mbar of vaporized chromyl chloride, titanium tetrachloride, vanadyl chloride, or mixtures thereof, in the presence of a gas of hydrogen, nitrogen, sulfur hexafluoride, or oxygen, or a mixture of any of these gases with a noble gas, or in the presence of a noble gas.
Claim 2
Independent Claim
130 words
A method which comprises catalytically dehydrogenating branched or unbranched, saturated or unsaturated hydrocarbons having 2-6 carbon atoms, or mixtures of such hydrocarbons, at a temperature of 300°-700° C. and a pressure of 0.1-20 bar, in the presence of a metal oxide powder comprising Cr (III) oxide, Ti (IV) oxide, V (V) oxide, or mixtures thereof, having a BET surface area of 5-50 m 2 /g and a mean particle diameter of 25-350 nm, having been prepared by continuous laser pyrolysis at a pressure of 10-1000 mbar of vaporized chromyl chloride, titanium tetrachloride, vanadyl chloride, or mixtures thereof, in the presence of a gas of hydrogen, nitrogen, sulfur hexafluoride, or oxygen, or a mixture of any of these gases with a noble gas, or in the presence of a noble gas.
Claim 3
Dependent Claim
29 words
The method according to claim 1, wherein said metal oxide powder comprises a mixture of at least two of Cr (III) oxide, Ti (IV) oxide, and V (V) oxide.
Claim 4
Dependent Claim
19 words
The method according to claim 1, wherein said metal oxide powder comprises Cr (III) oxide and V (V) oxide.
Claim 5
Dependent Claim
22 words
The method according to claim 1, wherein said metal oxide powder comprises Cr (III) oxide, Ti (IV) oxide and V (V) oxide.
Claim 6
Independent Claim
22 words
The method according to claims 1, 2, 3 or 4 wherein hydrogen, steam, oxygen, or mixtures thereof, is present during the dehydrogenation.
Claim 7
Independent Claim
148 words
The method which comprises catalytically dehydrogenating branched or unbranched, saturated or unsaturated hydrocarbons having 2-6 carbon atoms, or mixtures of such hydrocarbons, at a temperature of 300°-700° C. and a pressure of 0.1-20 bar, in the presence of a molded body comprising aluminum hydroxide in an amount of up to 90 wt. %, a metal oxide powder comprising Cr (II) oxide, Ti (IV) oxide, V (V) oxide, or mixtures thereof, having a BET surface area of 5-50 m 2 /g and a mean particle diameter of 25-350 nm, having been prepared by continuous laser pyrolysis at a pressure of 10-1000 mbar of vaporized chromyl chloride, titanium tetrachloride, vanadyl chloride, or mixtures thereof, in the presence of a gas of hydrogen, nitrogen, sulfur hexafluoride, or oxygen, or a mixture of any of these gases with a noble gas, or in the presence of a noble gas, and a binder.
Claim 8
Independent Claim
148 words
The method which comprises catalytically dehydrogenating branched or unbranched, saturated or unsaturated hydrocarbons having 2-6 carbon atoms, or mixtures of such hydrocarbons, at a temperature of 300°-700° C. and a pressure of 0.1-20 bar, in the presence of a molded body comprising aluminum hydroxide in an amount of up to 90 wt. %, a metal oxide powder comprising Cr (II) oxide, Ti (IV) oxide, V (V) oxide, or mixtures thereof, having a BET surface area of 5-50 m 2 /g and a mean particle diameter of 25-350 nm, having been prepared by continuous laser pyrolysis at a pressure of 10-1000 mbar of vaporized chromyl chloride, titanium tetrachloride, vanadyl chloride, or mixtures thereof, in the presence of a gas of hydrogen, nitrogen, sulfur hexafluoride, or oxygen, or a mixture of any of these gases with a noble gas, or in the presence of a noble gas, and a binder.
Claim 9
Dependent Claim
29 words
The method according to claim 6, wherein said metal oxide powder comprises a mixture of at least two of Cr (III) oxide, Ti (IV) oxide and V (V) oxide.
Claim 10
Dependent Claim
19 words
The method according to claim 6, wherein said metal oxide powder comprises Cr (III) oxide and Ti (V) oxide.
Claim 11
Dependent Claim
18 words
The method according to claim 6, wherein said metal oxide comprises Cr (III) oxide and V (V) oxide.
Claim 12
Dependent Claim
21 words
The method according to claim 6, wherein said metal oxide comprises Cr (III) oxide, Ti (IV) oxide and V (V) oxide.
Claim 13
Independent Claim
23 words
The method according to claims 6, 7, 8, 9, or 10, wherein hydrogen, steam, oxygen, or mixtures thereof, is present during the dehydrogenation.
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