GB802559A - A dehydrogenation process - Google Patents
A dehydrogenation processInfo
- Publication number
- GB802559A GB802559A GB39006/56A GB3900656A GB802559A GB 802559 A GB802559 A GB 802559A GB 39006/56 A GB39006/56 A GB 39006/56A GB 3900656 A GB3900656 A GB 3900656A GB 802559 A GB802559 A GB 802559A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catalyst
- hydrocarbons
- praseodymium oxide
- alumina
- silica
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
- C07C5/373—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen with simultaneous isomerisation
- C07C5/393—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen with simultaneous isomerisation with cyclisation to an aromatic six-membered ring, e.g. dehydrogenation of n-hexane to benzene
- C07C5/41—Catalytic processes
- C07C5/412—Catalytic processes with metal oxides or metal sulfides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
- C07C5/321—Catalytic processes
- C07C5/322—Catalytic processes with metal oxides or metal sulfides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
- C07C5/327—Formation of non-aromatic carbon-to-carbon double bonds only
- C07C5/333—Catalytic processes
- C07C5/3332—Catalytic processes with metal oxides or metal sulfides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Abstract
Praseodymium oxide is prepared by precipitation of the hydroxide from a solution of the nitrate with caustic soda, washing the precipitate with water until free of ions and drying at 100-650 DEG C. in an inert gas. The product may be used alone or supported on alumina, magnesia, bauxite, mixtures of alumina and silica, silica gel or kieselguhr, after activation by heating to 430-650 DEG C. in nitrogen or hydrogen, as a catalyst in the vapour phase dehydrogenation of acyclic hydrocarbons (see Group IV (b)). The catalyst may be regenerated by treatment with air or other oxidizing gas at dehydrogenating temperatures.ALSO:Acyclic hydrocarbons are dehydrogenated in the presence of a catalyst containing praseodymium oxide (see Group III) at 430-650 DEG C. and a space velocity (liquid volume/catalyst volume/hour) of not more than 2.0. The hydrocarbons may be gaseous or liquid, straight or branched chain, C2-C12 aliphatic hydrocarbons. Pressures may be sub- or superatmospheric (e.g. 50-100 p.s.i.) but are preferably atmospheric. The catalyst may be praseodymium oxide, alone or supported on alumina, magnesia, bauxite, silica, kieselguhr or silicaalumina mixtures, and may be regenerated by oxidizing with air or other oxidizing gas at dehydrogenating temperatures. Naphthenes are not affected and aliphatic hydrocarbons may be selectively dehydrogenated in the presence of cyclic compounds. This selectivity may be used to separate saturated aliphatic hydrocarbons from naphthenes, the unsaturated aliphatic and aromatic hydrocarbons formed from the former being separated from the latter by conventional means such as by treatment with sulphuric acid, sulphur dioxide or absorption with silica gel. In an example, praseodymium oxide is used alone to dehydrogenate n-heptane at 525 DEG C. and a space velocity of 0.2. The product contains 12.4 per cent by weight olefines and 8.3 per cent by weight aromatics.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US802559XA | 1956-05-23 | 1956-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB802559A true GB802559A (en) | 1958-10-08 |
Family
ID=22156217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB39006/56A Expired GB802559A (en) | 1956-05-23 | 1956-12-21 | A dehydrogenation process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB802559A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4742180A (en) * | 1984-04-16 | 1988-05-03 | Atlantic Richfield Company | Hydrocarbon dehydrogenation |
| GB2427574A (en) * | 2005-06-24 | 2007-01-03 | Ngimat Co | Catalytic method of reducing sulphur content of a petroleum fluid and reforming a hydrocarbon to produce hydrogen |
| US7625482B1 (en) | 2006-06-23 | 2009-12-01 | Ngimat Co. | Nanoparticulate-catalyzed oxygen transfer processes |
| CN114904507A (en) * | 2022-06-15 | 2022-08-16 | 济南大学 | Multifunctional praseodymium oxide nanorod catalyst for catalytic purification of diesel vehicle exhaust |
-
1956
- 1956-12-21 GB GB39006/56A patent/GB802559A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4742180A (en) * | 1984-04-16 | 1988-05-03 | Atlantic Richfield Company | Hydrocarbon dehydrogenation |
| GB2427574A (en) * | 2005-06-24 | 2007-01-03 | Ngimat Co | Catalytic method of reducing sulphur content of a petroleum fluid and reforming a hydrocarbon to produce hydrogen |
| GB2427574B (en) * | 2005-06-24 | 2009-04-08 | Ngimat Co | Nanoparticulate-catalyzed oxygen transfer processes |
| US7625482B1 (en) | 2006-06-23 | 2009-12-01 | Ngimat Co. | Nanoparticulate-catalyzed oxygen transfer processes |
| CN114904507A (en) * | 2022-06-15 | 2022-08-16 | 济南大学 | Multifunctional praseodymium oxide nanorod catalyst for catalytic purification of diesel vehicle exhaust |
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