GB397901A - Improvements in the reduction of aromatic hydroxy compounds - Google Patents
Improvements in the reduction of aromatic hydroxy compoundsInfo
- Publication number
- GB397901A GB397901A GB592132A GB592132A GB397901A GB 397901 A GB397901 A GB 397901A GB 592132 A GB592132 A GB 592132A GB 592132 A GB592132 A GB 592132A GB 397901 A GB397901 A GB 397901A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphide
- vanadium
- molybdenum
- tungsten
- sulphides
- 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
- C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
- C07C15/02—Monocyclic hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Aromatic hydrocarbons are prepared by circulating aromatic hydroxy compounds in the vapour phase with hydrogen under pressure over the customary catalysts, the time of contact being so short that a substantial part, preferably from 10 to 40 per cent, of the hydroxy compound remains unconverted. The hydroxy compound is preferably passed over the catalyst in an amount per hour which, measured as a liquid, is at least equal to but not more than twice the volume of the catalyst. The product is isolated from the reaction gases and the remainder introduced with fresh hydroxy compound into the reaction chamber. As catalyst is preferably employed a metal of group 6 or of the iron group or vanadium or a compound thereof, particularly a sulphide or selenide of molybdenum, tungsten or vanadium. The said sulphides or selenides may be mixed with graphite, kaolin, zinc oxide or sulphide; whilst it is advantageous, in the case of molybdenum and tungsten sulphides to heat them temporarily to a high temperature, e.g. 750-850 DEG C., before use. Pressures of 20-300 atmospheres and temperatures of 350-550 DEG C. may be employed. Aromatic hydroxy compounds mentioned are phenol, cresols, xylenols, ethylphenols, dihydroxy- and trihydroxybenzenes, and naphthols. Examples are given of the conversion into the corresponding aromatic hydrocarbons of (1) phenol over molybdenum sulphide, (2) the crude phenolic oil mixture obtained by dephenolizing brown coal low temperature carbonization water over a pressed mixture of graphite and tungsten sulphide previously heated to 750 DEG C., and (3) crude cresol over vanadium sulphide.ALSO:Catalysts for the reduction of aromatic hydroxy compounds to aromatic hydrocarbons at elevated temperature and pressure preferably comprise a metal of group 6 or of the iron group or vanadium or a compound thereof, particularly sulphide or selenide of molybdenum, tungsten or vanadium. The said sulphides or selenides may be mixed with graphite, kaolin, zinc oxide or sulphide, whilst it is advantageous, in the case of molybdenum and tungsten sulphides, to heat them temporarily to a high temperature, e.g. 750-850 DEG C., before use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB592132A GB397901A (en) | 1932-02-27 | 1932-02-27 | Improvements in the reduction of aromatic hydroxy compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB592132A GB397901A (en) | 1932-02-27 | 1932-02-27 | Improvements in the reduction of aromatic hydroxy compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB397901A true GB397901A (en) | 1933-08-28 |
Family
ID=9805130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB592132A Expired GB397901A (en) | 1932-02-27 | 1932-02-27 | Improvements in the reduction of aromatic hydroxy compounds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB397901A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4097541A (en) * | 1973-06-21 | 1978-06-27 | Kogyo Kaihatsu Kenkyusho (Industrial Research Institut) | Process of producing mainly monocyclic aromatic compounds from unutilized carbon resources mainly composed of polycyclic aromatic compounds |
-
1932
- 1932-02-27 GB GB592132A patent/GB397901A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4097541A (en) * | 1973-06-21 | 1978-06-27 | Kogyo Kaihatsu Kenkyusho (Industrial Research Institut) | Process of producing mainly monocyclic aromatic compounds from unutilized carbon resources mainly composed of polycyclic aromatic compounds |
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