GB883042A - Method of purifying naphthalene - Google Patents
Method of purifying naphthaleneInfo
- Publication number
- GB883042A GB883042A GB11975/60A GB1197560A GB883042A GB 883042 A GB883042 A GB 883042A GB 11975/60 A GB11975/60 A GB 11975/60A GB 1197560 A GB1197560 A GB 1197560A GB 883042 A GB883042 A GB 883042A
- Authority
- GB
- United Kingdom
- Prior art keywords
- naphthalene
- parts
- reflux
- sulphuric acid
- purified
- 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
- C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
- C07C7/17—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with acids or sulfur oxides
- C07C7/171—Sulfuric acid or oleum
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (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
Acid washed naphthalene is further purified by distilling in the presence of at least 0,1% by weight of an alkali metal hydroxide. The naphthalene preferably has a setting point of at least 79,5 DEG C. having been purified by sulphuric acid washing or treatment with formaldehyde and sulphuric acid. The caustic alkali, preferably used in amounts of 0,3-2%, may be used as finely divided solid or 10-30% aqueous solution. In the examples, 1,000 parts of naphthalene are distilled, 5 parts being removed at 90% reflux and the main fraction of 880 parts at 50% reflux.ALSO:Acid washed naphthalene is further purified by distilling in the presence of at least 0.1% by weight of an alkali metal hydroxide. The naphthalene preferably has a setting point of at least 79.5 DEG C. having been purified by sulphuric acid washing treatment with formaldehyde and sulphuric acid. The caustic alkali, preferably used in amounts of 0.3%-2%, may be used as finely divided solid or 10%-30% aqueous solution. In the examples, 1,000 parts of naphthalene are distilled, 5 parts being removed at 90% reflux and the main fraction of 880 parts at 50% reflux.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US883042XA | 1960-02-12 | 1960-02-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB883042A true GB883042A (en) | 1961-11-22 |
Family
ID=22210587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11975/60A Expired GB883042A (en) | 1960-02-12 | 1960-04-05 | Method of purifying naphthalene |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB883042A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3525777A (en) * | 1968-12-23 | 1970-08-25 | United States Steel Corp | Method of recovering naphthalene |
-
1960
- 1960-04-05 GB GB11975/60A patent/GB883042A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3525777A (en) * | 1968-12-23 | 1970-08-25 | United States Steel Corp | Method of recovering naphthalene |
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