GB858132A - Preparation of coal tar pitches - Google Patents
Preparation of coal tar pitchesInfo
- Publication number
- GB858132A GB858132A GB32362/57A GB3236257A GB858132A GB 858132 A GB858132 A GB 858132A GB 32362/57 A GB32362/57 A GB 32362/57A GB 3236257 A GB3236257 A GB 3236257A GB 858132 A GB858132 A GB 858132A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube furnace
- tar
- pitch
- starting material
- decomposition
- 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
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C1/00—Working-up tar
- C10C1/19—Working-up tar by thermal treatment not involving distillation
Abstract
858,132. Pitch; coking tar and tar products. RUTGERSWERKE A.G. Oct. 16, 1957 [Oct. 23, 1956; May 21, 1957 (2)], No. 32362/57. Classes 55 (1) and 55 (2). Pitch containing more than 38% but not more than 90% by weight coke residue are produced from tars and distillation products of tar particularly coal tar by passing the starting material continuously through a tube furnace heated to a temperature between 450‹ and 525‹ C. and discharging under pressure the thus treated material into a vessel where it is allowed to undergo further decomposition under pressure, e.g. 3-10 atmospheres, before being discharged. The pitch product may be withdrawn from the decomposition vessel in batches or continuously and the time allowed for further decomposition may be from 4-5 minutes to 3 hours depending on the temperature employed in the tube furnace and the product desired. The discharged pitch product may be subjected to a flash evaporation and the sensible heat of the evolved vapours may be used to preheat the starting material. The starting material may be treated with solid, liquid or gaseous oxidizing agents during passage through the tube furnace or in a preliminary treatment at a temperature between 200‹ and 300‹ C. before passage through the tube furnace. Suitable oxidizing agents are lignite tar from which 50% of the lighter constituents have been distilled off, lignite, lignin, xylenols, trimethylphenols and multi-valent phenols. Treatment with air may also be effected in the decomposition vessel and gases resulting from the treatments may be continuously discharged from the decomposition vessel under pressure. The starting material may in certain cases be subjected to a preliminary distillation to remove low boiling constituents before being passed to the tube furnace. The tube furnace may have tubes of 50-60 mm. diameter and be of a length of about 400 metres such that the material being treated passes through the furnace in about 5 minutes. The pitch obtained may be used for briquetting or be coked and graphitized.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1183802X | 1956-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB858132A true GB858132A (en) | 1961-01-04 |
Family
ID=7730575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32362/57A Expired GB858132A (en) | 1956-10-23 | 1957-10-16 | Preparation of coal tar pitches |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2985577A (en) |
| GB (1) | GB858132A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3190812A (en) * | 1960-01-22 | 1965-06-22 | Ruetgerswerke Ag | Device for the continuous production of hard pitch |
| US3051628A (en) * | 1960-07-22 | 1962-08-28 | Consolidation Coal Co | Preparing metallurgical fuel from noncaking coal utilizing air-blown pitch binder |
| DE3030723C2 (en) | 1980-08-14 | 1984-09-20 | Rütgerswerke AG, 6000 Frankfurt | Process for dissolving coal in hydrocarbon mixtures |
| US4664774A (en) * | 1984-07-06 | 1987-05-12 | Allied Corporation | Low solids content, coal tar based impregnating pitch |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2007212A (en) * | 1927-12-15 | 1935-07-09 | William B D Penniman | Process for treating oils |
| US2070961A (en) * | 1930-07-18 | 1937-02-16 | Barrett Co | Process of treating tar and pitch |
| US2345877A (en) * | 1939-01-23 | 1944-04-04 | Standard Catalytic Co | Manufacture of liquid hydrocarbons |
| US2809153A (en) * | 1952-07-14 | 1957-10-08 | Exxon Research Engineering Co | Process for producing low-sediment fuel |
| US2796388A (en) * | 1953-07-02 | 1957-06-18 | Gulf Research Development Co | Preparation of petroleum pitch |
| US2752290A (en) * | 1953-11-27 | 1956-06-26 | Cabot Godfrey L Inc | Production of pitch from petroleum residues |
-
1957
- 1957-10-15 US US690392A patent/US2985577A/en not_active Expired - Lifetime
- 1957-10-16 GB GB32362/57A patent/GB858132A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2985577A (en) | 1961-05-23 |
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