GB913850A - Process for recovering naphthalene with a solidification point above 78íµ. from tar oil fractions - Google Patents
Process for recovering naphthalene with a solidification point above 78íµ. from tar oil fractionsInfo
- Publication number
- GB913850A GB913850A GB4227159A GB4227159A GB913850A GB 913850 A GB913850 A GB 913850A GB 4227159 A GB4227159 A GB 4227159A GB 4227159 A GB4227159 A GB 4227159A GB 913850 A GB913850 A GB 913850A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oil
- solidification point
- naphthalene
- crystals
- caustic
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (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
Naphthalene having a solidification point above 78 DEG C. is obtained by cooling, e.g. to 15-25 DEG C., a naphthalene-containing tar oil having an acid oil content of at least 7%, separating the crystals and covering with 20-120% of the crystals of a caustic alkali or caustic phenolate solution at a temperature above the solidification point of the product. The acid oil may be carbolated oil obtained from the tar and need not be recovered separately or some of the oil obtained by centrifuging the crystals may be recycled to dilute the feed. The naphthalene oil should contain less than 10% of methyl naphthalene oil. The oil is cooled at a speed slower than 2.5 DEG C. per hour to 5-35 DEG C. below the solidification point of the mixture and the washing solution may be 0.5-23 DEG C. hotter than this solidification point. The caustic solution can be reused until saturated with acid oils which can be recovered by treatment with carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4227159A GB913850A (en) | 1959-12-11 | 1959-12-11 | Process for recovering naphthalene with a solidification point above 78íµ. from tar oil fractions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4227159A GB913850A (en) | 1959-12-11 | 1959-12-11 | Process for recovering naphthalene with a solidification point above 78íµ. from tar oil fractions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB913850A true GB913850A (en) | 1962-12-28 |
Family
ID=10423675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4227159A Expired GB913850A (en) | 1959-12-11 | 1959-12-11 | Process for recovering naphthalene with a solidification point above 78íµ. from tar oil fractions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB913850A (en) |
-
1959
- 1959-12-11 GB GB4227159A patent/GB913850A/en not_active Expired
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