GB790595A - Dealkylation of aromatic hydrocarbons - Google Patents
Dealkylation of aromatic hydrocarbonsInfo
- Publication number
- GB790595A GB790595A GB20202/56A GB2020256A GB790595A GB 790595 A GB790595 A GB 790595A GB 20202/56 A GB20202/56 A GB 20202/56A GB 2020256 A GB2020256 A GB 2020256A GB 790595 A GB790595 A GB 790595A
- Authority
- GB
- United Kingdom
- Prior art keywords
- naphthalenes
- hydrogen
- solid
- aromatic hydrocarbons
- mesh
- 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
- C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
- C07C4/08—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule
- C07C4/12—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene
- C07C4/14—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene splitting taking place at an aromatic-aliphatic bond
- C07C4/16—Thermal processes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Alkylated aromatic hydrocarbons are dealkylated in the presence of hydrogen and in the presence of a catalytically inert finely divided solid at 1100-1600 DEG F., 400-1000 p.s.i.g. and 2-120 seconds by heating the vaporized hydrocarbon and hydrogen, entraining the solid, heated to a higher temperature than the gaseous mixture, to form a disperse phase having a solids density of 2-20 pounds per cubic foot which is passed through an elongated reaction zone preferably having a length/diameter ratio of 10-120:1. The feed stock may be toluene, xylenes, ethyl benzene, mesitylene, methyl naphthalenes, dimethyl naphthalenes methylethyl naphthalenes and trimethyl naphthalenes. The solid which may be alpha alumina, quartz, carborundum or mullite, and the particle size is preferably 100-400 mesh (American Mesh Standard). The amount of hydrogen is in the range 2000-10,000 standard cubic feet per barrel of aromatic hydrocarbon.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US790595XA | 1955-07-21 | 1955-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB790595A true GB790595A (en) | 1958-02-12 |
Family
ID=22148154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20202/56A Expired GB790595A (en) | 1955-07-21 | 1956-06-29 | Dealkylation of aromatic hydrocarbons |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB790595A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3192281A (en) * | 1961-03-23 | 1965-06-29 | Exxon Research Engineering Co | Temperature control in hydrodealkylation |
| US3256357A (en) * | 1964-04-17 | 1966-06-14 | Exxon Research Engineering Co | Temperature control in hydrodealkylation process |
| US3284526A (en) * | 1963-09-04 | 1966-11-08 | Gulf Research Development Co | Process for thermal hydrodealkylation |
| WO2019016127A1 (en) | 2017-07-20 | 2019-01-24 | IFP Energies Nouvelles | Method of hydrogenolysis for improved production of paraxylene |
-
1956
- 1956-06-29 GB GB20202/56A patent/GB790595A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3192281A (en) * | 1961-03-23 | 1965-06-29 | Exxon Research Engineering Co | Temperature control in hydrodealkylation |
| US3284526A (en) * | 1963-09-04 | 1966-11-08 | Gulf Research Development Co | Process for thermal hydrodealkylation |
| US3256357A (en) * | 1964-04-17 | 1966-06-14 | Exxon Research Engineering Co | Temperature control in hydrodealkylation process |
| WO2019016127A1 (en) | 2017-07-20 | 2019-01-24 | IFP Energies Nouvelles | Method of hydrogenolysis for improved production of paraxylene |
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