GB812725A - Improvements in the production of hot-pressing quality naphthalene - Google Patents
Improvements in the production of hot-pressing quality naphthaleneInfo
- Publication number
- GB812725A GB812725A GB24621/56A GB2462156A GB812725A GB 812725 A GB812725 A GB 812725A GB 24621/56 A GB24621/56 A GB 24621/56A GB 2462156 A GB2462156 A GB 2462156A GB 812725 A GB812725 A GB 812725A
- Authority
- GB
- United Kingdom
- Prior art keywords
- naphthalene
- oil
- fraction
- hot
- production
- 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
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
- B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In the production of hot-pressing quality naphthalene from naphthalene oil by cooling to crystallize at least part of the naphthalene, passing through a worm press having apertures through which oil is discharged, collecting the oil in at least two fractions the first being obtained nearer the inlet than the second and being comparatively poor in naphthalene but rich in thionaphthene, the second being rich in naphthalene and recycling the second fraction to the starting naphthalene oil, the first fraction is cooled to form crystallized naphthalene solidifying at about 68 DEG C. and a low naphthalene content oil solidifying below 25 DEG C. the solidified naphthalene is melted and recycled with the second fraction. The chilling of the first fraction is preferably performed batchwise but may be done continuously and the solid and oil separated by centrifuging. The solid may be washed with a selective solvent to remove adhering oil before melting. Specification 766,371 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER17240A DE1005050B (en) | 1955-08-10 | 1955-08-10 | Process for the production of naphthalene in hot pressed material quality |
Publications (1)
Publication Number | Publication Date |
---|---|
GB812725A true GB812725A (en) | 1959-04-29 |
Family
ID=7399929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24621/56A Expired GB812725A (en) | 1955-08-10 | 1956-08-10 | Improvements in the production of hot-pressing quality naphthalene |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE550237A (en) |
DE (1) | DE1005050B (en) |
FR (1) | FR1155715A (en) |
GB (1) | GB812725A (en) |
NL (2) | NL100677C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3197524A (en) * | 1960-11-10 | 1965-07-27 | Union Oil Co | Recovery of petroleum naphthalene |
-
0
- NL NL209688D patent/NL209688A/xx unknown
- BE BE550237D patent/BE550237A/xx unknown
- NL NL100677D patent/NL100677C/xx active
-
1955
- 1955-08-10 DE DER17240A patent/DE1005050B/en active Pending
-
1956
- 1956-08-10 GB GB24621/56A patent/GB812725A/en not_active Expired
- 1956-08-10 FR FR1155715D patent/FR1155715A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3197524A (en) * | 1960-11-10 | 1965-07-27 | Union Oil Co | Recovery of petroleum naphthalene |
Also Published As
Publication number | Publication date |
---|---|
BE550237A (en) | |
NL100677C (en) | |
NL209688A (en) | |
DE1005050B (en) | 1957-03-28 |
FR1155715A (en) | 1958-05-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2881127A (en) | Separation process | |
GB1065725A (en) | Purification of adipodinitrile | |
GB812725A (en) | Improvements in the production of hot-pressing quality naphthalene | |
US2688045A (en) | Production of paraxylene concentrate | |
CN107652156A (en) | A kind of method for crystallising and device of β methyl naphthalenes | |
ES306649A1 (en) | A procedure for continuous recovery of p-xylene from liquid mixtures containing p-xylene. (Machine-translation by Google Translate, not legally binding) | |
GB796480A (en) | Recovery of crystallizable hydrocarbons | |
JPH04306296A (en) | Production of liquid fatty acid and solid fatty acid | |
US2937189A (en) | Production of pyromellitic dianhydride | |
DE931464C (en) | Process for the continuous recovery of benzene with a high degree of purity | |
US3616268A (en) | Acetic acid recovery from aqueous solution by distillation and crystallization | |
GB834614A (en) | Process of producing crystalline ammonium bifluoride | |
US2483420A (en) | Purification of isoquinoline | |
US3046217A (en) | Method of preparing improved wood preservative from coal tar creosote | |
DE1593238C (en) | Process for the separation of a product enriched in trans, trans-bis (p-aminocyclohexyl) -ni ethane from a mixture of the stereoisomers | |
GB796479A (en) | Durene recovery process | |
US1581258A (en) | Purification of alpha-nitro-naphthalene | |
DE804559C (en) | Process for removing oily contaminants from naphthalene | |
GB1292812A (en) | Separation process | |
GB1265733A (en) | ||
US2552584A (en) | Preparation of thiourea | |
SU417407A1 (en) | METHOD FOR ISOLATING PYREN FROM PYRENE-CONTAINING FRACTIONS | |
US1412937A (en) | Manufacture of thymol | |
SU369896A1 (en) | METHOD FOR FRACTIONING DAIRY FAT | |
GB917916A (en) | Process and apparatus for the separation of substances by fractional crystallisationfrom melts |