GB858769A - Manufacture of pure hexachlorocyclopentadiene - Google Patents
Manufacture of pure hexachlorocyclopentadieneInfo
- Publication number
- GB858769A GB858769A GB33300/57A GB3330057A GB858769A GB 858769 A GB858769 A GB 858769A GB 33300/57 A GB33300/57 A GB 33300/57A GB 3330057 A GB3330057 A GB 3330057A GB 858769 A GB858769 A GB 858769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hexachlorocyclopentadiene
- crude
- solvent
- cooled
- solution
- 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
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/392—Separation; Purification; Stabilisation; Use of additives by crystallisation; Purification or separation of the crystals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Crude liquid hexachloro-cyclopentadiene or a solution of it is cooled to such a temperature that crystalline hexachlorocyclopentadiene separates from the crude oily substance or from the solution and is obtained in a pure form. If a very impure crude substance is treated it may be necessary to repeat the crystallisation process to obtain a product of desired purity. The temperature to which the crude material is cooled should be between that at which the hexachlorocyclopentadiene melts in the medium concerned and about -70 DEG C. In general the upper limit is -10 DEG C. As solvent there may be used isopropanol, n-propanol, or acetone, or a mixture of these. Somewhat less suitable are petroleum ether and benzine. If no solvent is present during the crystallisation process, the product must subsequently be washed with a cooled solvent. The crude hexachlorocyclopentadiene may be in the form of a solution obtained by chlorination with alkali hypochlorite of cyclopentadiene in the presence of a solvent, which is immiscible or sparingly miscible with water, and separation from the aqueous phase.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE858769X | 1956-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB858769A true GB858769A (en) | 1961-01-18 |
Family
ID=6789911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33300/57A Expired GB858769A (en) | 1956-11-16 | 1957-10-24 | Manufacture of pure hexachlorocyclopentadiene |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB858769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3538179A (en) * | 1968-11-20 | 1970-11-03 | Phillips Petroleum Co | Purification of isoprene |
-
1957
- 1957-10-24 GB GB33300/57A patent/GB858769A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3538179A (en) * | 1968-11-20 | 1970-11-03 | Phillips Petroleum Co | Purification of isoprene |
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