GB966704A - Process of dehydrogenation - Google Patents
Process of dehydrogenationInfo
- Publication number
- GB966704A GB966704A GB4355260A GB4355260A GB966704A GB 966704 A GB966704 A GB 966704A GB 4355260 A GB4355260 A GB 4355260A GB 4355260 A GB4355260 A GB 4355260A GB 966704 A GB966704 A GB 966704A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catalyst
- steam
- alkyl aromatic
- masses
- heated
- 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
- C07C5/327—Formation of non-aromatic carbon-to-carbon double bonds only
- C07C5/333—Catalytic processes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In the dehydrogenation of alkyl aromatic halohydrocarbons to a vinyl aromatic halohydrocarbon, the starting alkyl aromatic is passed with superheated steam through a plurality of fixed masses of a dehydrogenation catalyst and additional heat is supplied to the reactants between the catalyst masses without substantially increasing the reaction temperature. In one embodiment the whole of the superheated steam is mixed with the alkyl aromatic and the reaction mixture is heated by heat exchangers between the catalyst masses and in an alternative the steam is split into streams and a proportion added to the alkyl aromatic or reaction mixture before passing into each catalyst mass. The reaction temperature may be 600-650 DEG C. for which the steam in the first embodiment is heated to 750-825 DEG C. and in the second 725-775 DEG C. The total amount of steam may be 1.5-20 pounds per pound of alkyl aromatic and 2-5 catalyst beds may be used, arranged in a single reactor if desired. The catalyst may be Fe2O3-Cr2O3-K2CO3, Fe O-K2O, MgO-Fe O-K2CO3 or Al2O3-SiO2-Ni and the starting material ethylchlorobenzene.ALSO:In the dehydrogenation of alkyl aromatic hydrocarbons to a vinyl aromatic hydrocarbon the starting alkyl aromatic is passed with super-heated steam through a plurality of fixed masses of a dehydrogenation catalyst and additional heat is supplied to the reactants between the catalyst masses without substantially increasing the reaction temperature. In one embodiment the whole of the superheated steam is mixed with the alkyl aromatic and the reaction mixture is heated by heat exchangers between the catalyst masses and in an alternative the steam is split into streams and a proportion added to the alkyl aromatic or reaction mixture before passing into each catalyst mass. The reaction temperature may be 600-650 DEG C. for which the steam in the first embodiment is heated to 750-825 DEG C. and in the second 725-775 DEG C. The total amount of steam may be 1.5-20 pounds per pound of alkyl aromatic and 2-5 catalyst beds may be used, arranged in a single reactor if desired. The catalyst may be Fe2O3-Cr2O3-K2CO3, FeO-K2O, MgO-FeO -K2CO3 or Al2O3-SiO2-Ni and the starting material ethyl benzene, isopropylbenzene, diethylbenzene or ethylnaphthalene.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86050859A | 1959-12-18 | 1959-12-18 | |
US562A US3118006A (en) | 1960-01-05 | 1960-01-05 | Dehydrogenation of alkylated aromatic hydrocarbons |
Publications (1)
Publication Number | Publication Date |
---|---|
GB966704A true GB966704A (en) | 1964-08-12 |
Family
ID=26667818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4355260A Expired GB966704A (en) | 1959-12-18 | 1960-12-19 | Process of dehydrogenation |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB966704A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2408726A4 (en) * | 2009-03-17 | 2015-08-26 | Lummus Technology Inc | Method of providing heat for chemical conversion and a process and system employing the method for the production of olefin |
-
1960
- 1960-12-19 GB GB4355260A patent/GB966704A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2408726A4 (en) * | 2009-03-17 | 2015-08-26 | Lummus Technology Inc | Method of providing heat for chemical conversion and a process and system employing the method for the production of olefin |
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