GB697013A - Improvements in and relating to the de-alkylation of aromatic hydrocarbons - Google Patents
Improvements in and relating to the de-alkylation of aromatic hydrocarbonsInfo
- Publication number
- GB697013A GB697013A GB17802/50A GB1780250A GB697013A GB 697013 A GB697013 A GB 697013A GB 17802/50 A GB17802/50 A GB 17802/50A GB 1780250 A GB1780250 A GB 1780250A GB 697013 A GB697013 A GB 697013A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aluminium
- aromatic hydrocarbons
- xylenes
- olefins
- catalyst
- 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
-
- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/16—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr
-
- 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
- C07C4/18—Catalytic processes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2527/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- C07C2527/14—Phosphorus; Compounds thereof
- C07C2527/16—Phosphorus; Compounds thereof containing oxygen
- C07C2527/167—Phosphates or other compounds comprising the anion (PnO3n+1)(n+2)-
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Alkylated monocyclic aromatic hydrocarbons are de-alkylated by treating a feed containing such hydrocarbons at 500-600 DEG , preferably 540-570 DEG C., and above 100, preferably 200-300 ats. with hydrogen in the presence of a supported or unsupported catalyst consisting substantially of an aluminium phosphate. Toluene, xylenes, ethylbenzene and trimethylbenzenes are suitable initial materials, also mixtures derived from petroleum, coal, and coal tar as by distillation or extracts thereof. Paraffins, naphthenes, olefins, and di-olefins may also be present. Fractions of cracked petrols boiling at 125-150 DEG and 150-175 DEG C., are specified. Dehydrogenation and cyclization may also occur. Aluminium orthophosphate, alone or admixed or supported on alumina, silica or compounds thereof such as aluminium silicates is a suitable catalyst. Batch or continuous operation is possible. In an example, xylenes are treated at different feed rates, the catalyst being prepared by precipitating with ammonia an aqueous solution of equimolar aluminium nitrate- and orthophosphoric acid, extruding, drying, and calcining. Increasing the feed rate lowers the yield of lower aromatic hydrocarbons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17802/50A GB697013A (en) | 1950-07-17 | 1950-07-17 | Improvements in and relating to the de-alkylation of aromatic hydrocarbons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17802/50A GB697013A (en) | 1950-07-17 | 1950-07-17 | Improvements in and relating to the de-alkylation of aromatic hydrocarbons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB697013A true GB697013A (en) | 1953-09-16 |
Family
ID=10101479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17802/50A Expired GB697013A (en) | 1950-07-17 | 1950-07-17 | Improvements in and relating to the de-alkylation of aromatic hydrocarbons |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB697013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3253050A (en) * | 1961-12-06 | 1966-05-24 | Bayer Ag | Process for the production of alkylated benzene hydrocarbons |
-
1950
- 1950-07-17 GB GB17802/50A patent/GB697013A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3253050A (en) * | 1961-12-06 | 1966-05-24 | Bayer Ag | Process for the production of alkylated benzene hydrocarbons |
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