GB750877A - Purification of isopropylnaphthalene - Google Patents
Purification of isopropylnaphthaleneInfo
- Publication number
- GB750877A GB750877A GB17420/54A GB1742054A GB750877A GB 750877 A GB750877 A GB 750877A GB 17420/54 A GB17420/54 A GB 17420/54A GB 1742054 A GB1742054 A GB 1742054A GB 750877 A GB750877 A GB 750877A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isopropylnaphthalene
- beta
- naphthalene
- alkali metal
- oxidation
- 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
- C07C7/005—Processes comprising at least two steps in series
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
- C07C7/05—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
- C07C7/05—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds
- C07C7/06—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds by azeotropic distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic 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
Isopropylnaphthalene containing the beta isomer is purified to increase the activity of the beta isomer towards hydroperoxide type oxidation in the manufacture of beta naphthol by contacting the isopropylnaphthalene with an alkali metal hydroxide and fractionally distilling at a temperature below 200 DEG C. in the absence of molecular oxygen to obtain a fraction free from naphthalene boiling in the range of isopropylnaphthalene. The preferred alkali metal hydroxide is sodium hydroxide in an amount of 0.05 to 10 per cent. Treatment may be in the form of a separate step in which case the isopropylnaphthalene is removed as a layer, or the separation may be effected by distillation preferably using a pressure below 150 mm. using an inert gas such as nitrogen, steam or carbon dioxide to displace the air. In addition organic compounds such as benzyl alcohol, tetrahydrofurfuryl alcohol, glycerol or glycol may be added to form azeotropes with the naphthalene. The process may be applied, not only to the treatment of mixed alpha and beta-isopropylnaphthalene obtained directly from the propylation of naphthalene, but also to the isopropylnaphthalene recovered from an oxidation process in which part of the beta isopropylnaphthalene has been removed by conversion to the hydroperoxide by selective oxidation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US750877X | 1953-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB750877A true GB750877A (en) | 1956-06-20 |
Family
ID=22123461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17420/54A Expired GB750877A (en) | 1953-06-29 | 1954-06-14 | Purification of isopropylnaphthalene |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB750877A (en) |
-
1954
- 1954-06-14 GB GB17420/54A patent/GB750877A/en not_active Expired
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