GB766371A - Process for the production of naphthalene hot-pressing material - Google Patents
Process for the production of naphthalene hot-pressing materialInfo
- Publication number
- GB766371A GB766371A GB18759/54A GB1875954A GB766371A GB 766371 A GB766371 A GB 766371A GB 18759/54 A GB18759/54 A GB 18759/54A GB 1875954 A GB1875954 A GB 1875954A GB 766371 A GB766371 A GB 766371A
- Authority
- GB
- United Kingdom
- Prior art keywords
- naphthalene
- worm
- press
- oil
- expressed oil
- 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
- C07C7/00—Purification; Separation; Use of additives
- C07C7/14—Purification; Separation; Use of additives by crystallisation; Purification or separation of the crystals
Abstract
Naphthalene having a solidification point greater than 79 DEG C is obtained by cooling naphthalene oil to a temperature at which at least a part of the naphthalene is crystallized and treating it in a continuously operating worm press or other pressing means, the cylindrical external wall of which is preferably arranged horizontally and is formed with slots or holes through which the expressed oil discharges outwardly, the expressed oil being collected in at least two separate fractions, the latter one of which being rich in naphthalene is immediately again mixed with the starting material, after optional cooling. Preferably the initial material is at a temperature less than 60 DEG C. and is in the form of coarsely crystalline naphthalene. The pressing means may comprise extrusion presses, thrust centrifuges, or worm centrifuges. The pressing may either be effected by using two separate worm presses, and so choosing the individual pressures that the second press supplies a final product which has a solidification point of at least 79 DEG C., or by using a single worm press in which the expressed oil is formed with a substantially equal quantitative distribution throughout the entire length of the press housing, a higher pressure being set up at the beginning of the worm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18759/54A GB766371A (en) | 1954-06-25 | 1954-06-25 | Process for the production of naphthalene hot-pressing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18759/54A GB766371A (en) | 1954-06-25 | 1954-06-25 | Process for the production of naphthalene hot-pressing material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB766371A true GB766371A (en) | 1957-01-23 |
Family
ID=6673339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18759/54A Expired GB766371A (en) | 1954-06-25 | 1954-06-25 | Process for the production of naphthalene hot-pressing material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB766371A (en) |
-
1954
- 1954-06-25 GB GB18759/54A patent/GB766371A/en not_active Expired
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