GB612893A - Improvements in the production of cyclopentadiene - Google Patents
Improvements in the production of cyclopentadieneInfo
- Publication number
- GB612893A GB612893A GB1707546A GB1707546A GB612893A GB 612893 A GB612893 A GB 612893A GB 1707546 A GB1707546 A GB 1707546A GB 1707546 A GB1707546 A GB 1707546A GB 612893 A GB612893 A GB 612893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dimer
- monomer
- boiling point
- cyclopentadiene
- liquid medium
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Cyclopentadiene is obtained by heating its dimer by direct contact with an inert liquid heating medium. This preferably boils or begins to boil at the decomposition temperature of the dimer and is a solvent for hydrocarbons. Hydrocarbons or mixtures thereof, especially those obtained by cracking or fractionation of petroleum and other oils and having an initial boiling point of 190-250 DEG , especially 220-250 DEG C. The dimer may be heated in the liquid medium in a still under a reflux column operated so that the monomer distils. The dimer is preferably heated rapidly to well above its boiling point, e.g. 220-240 DEG C., at which temperature at least a substantial part of the liquid medium boils, the rate of feed being the same as that at which monomer is produced and removed. The liquid medium is periodically purified from the gummy by-products which dissolve therein. In an example, a hydrocarbon fraction boiling at 0-70 DEG C., and obtained by cracking gas oil, is stored until the cyclopentadiene is converted to dimer, and distilled up to 75 DEG C., the residue being fed to a still containing a gas oil fraction of initial boiling point 230 DEG C., kept boiling, monomer being collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1707546A GB612893A (en) | 1946-06-05 | 1946-06-05 | Improvements in the production of cyclopentadiene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1707546A GB612893A (en) | 1946-06-05 | 1946-06-05 | Improvements in the production of cyclopentadiene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB612893A true GB612893A (en) | 1948-11-18 |
Family
ID=10088796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1707546A Expired GB612893A (en) | 1946-06-05 | 1946-06-05 | Improvements in the production of cyclopentadiene |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB612893A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2831904A (en) * | 1954-08-31 | 1958-04-22 | Shell Dev | Depolymerization of dicyclopentadiene |
| DE1032250B (en) * | 1954-08-31 | 1958-06-19 | Bataafsche Petroleum | Process for the production of monocyclopentadiene by depolymerizing dicyclopentadiene |
| US2887517A (en) * | 1953-06-29 | 1959-05-19 | Ruhrchemie Ag | Production of cyclopentene |
| DE1067808B (en) * | 1956-03-16 | 1959-10-29 | Petrochemicals Ltd | Process for separating cyclopentadiene from a hydrocarbonaceous raw material |
| US3340315A (en) * | 1963-11-12 | 1967-09-05 | Ciba Ltd | Process for depolymerizing dicyclopentadiene or its methyl homologues |
-
1946
- 1946-06-05 GB GB1707546A patent/GB612893A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2887517A (en) * | 1953-06-29 | 1959-05-19 | Ruhrchemie Ag | Production of cyclopentene |
| US2831904A (en) * | 1954-08-31 | 1958-04-22 | Shell Dev | Depolymerization of dicyclopentadiene |
| DE1032250B (en) * | 1954-08-31 | 1958-06-19 | Bataafsche Petroleum | Process for the production of monocyclopentadiene by depolymerizing dicyclopentadiene |
| DE1067808B (en) * | 1956-03-16 | 1959-10-29 | Petrochemicals Ltd | Process for separating cyclopentadiene from a hydrocarbonaceous raw material |
| US3340315A (en) * | 1963-11-12 | 1967-09-05 | Ciba Ltd | Process for depolymerizing dicyclopentadiene or its methyl homologues |
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