GB654088A - Improvements in or relating to the distillation of furfural - Google Patents
Improvements in or relating to the distillation of furfuralInfo
- Publication number
- GB654088A GB654088A GB3866/48A GB386648A GB654088A GB 654088 A GB654088 A GB 654088A GB 3866/48 A GB3866/48 A GB 3866/48A GB 386648 A GB386648 A GB 386648A GB 654088 A GB654088 A GB 654088A
- Authority
- GB
- United Kingdom
- Prior art keywords
- furfural
- distillation
- evaporator
- steam
- polymer
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D307/40—Radicals substituted by oxygen atoms
- C07D307/46—Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
- C07D307/48—Furfural
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
<PICT:0654088/III/1> Furfural which has been used as a solvent in the extraction of aliphatic unsaturated hydrocarbons is purified from furfural-polymer by steam-distillation at a temperature below 290 DEG F.; the vapours are condensed, and the condensate is allowed to separate into a purified-furfural layer and a water layer. This water contains dissolved furfural and, in order to prevent loss, it is returned as a source of steam for the steam-distillation. The polymer is allowed to accumulate in the still, but the feed thereto is periodically interrupted while the steam-distillation is continued until the polymer content of the lower layer in the still reaches at least 90 per cent by weight, whereupon it is discharged; the feed to the still is then resumed. A hydrocarbon feed is treated with furfural in extractive-distillation column 2, and the extract is stripped in column 8 to give unsaturated hydrocarbons overhead and stripped-furfural as residue. Part of the stripped furfural is returned to the extractive-distillation unit and the remainder is subjected to steam-distillation in evaporator 14. The overhead vapours from evaporator 14 are condensed in condenser 19, and the condensate is passed to separator 21 from which purified furfural is withdrawn via line 13, and water, saturated with furfural, is withdrawn via line 23. This water may be passed as such, via line 28 and perforated pipe 16, to evaporator 14 where it is vaporized in situ by coil 15; or it may be vaporized externally in vaporizer 24 before being supplied to evaporator 14. It is preferable however, to use vaporizer 24 to supply most of the required heating while coil 15, which may be automatically controlled by a liquid-vapour interfacial lever controller applied to evaporator 14, supplies the balance. Polymer is periodically withdrawn from evaporator 14 by means of line 17. Although the recovery process may be carried out under vacuum it is preferable to operate at atmospheric, or under a slight positive, pressure in order to prevent the entry of air into the system, for oxygen promotes furfural-polymerization.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US654088XA | 1943-02-15 | 1943-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB654088A true GB654088A (en) | 1951-06-06 |
Family
ID=22062510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3866/48A Expired GB654088A (en) | 1943-02-15 | 1948-02-10 | Improvements in or relating to the distillation of furfural |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB654088A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2314751A1 (en) * | 1975-06-18 | 1977-01-14 | Flambeau Paper Co | PROCESS FOR CONCENTRATION OF A DILUTE CURRENT CONTAINING AN ADSORBABLE CHEMICAL SUBSTANCE |
| US20170050943A1 (en) * | 2014-05-08 | 2017-02-23 | Mitsubishi Chemical Corporation | Method for producing furfural, and method for producing furan |
-
1948
- 1948-02-10 GB GB3866/48A patent/GB654088A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2314751A1 (en) * | 1975-06-18 | 1977-01-14 | Flambeau Paper Co | PROCESS FOR CONCENTRATION OF A DILUTE CURRENT CONTAINING AN ADSORBABLE CHEMICAL SUBSTANCE |
| US20170050943A1 (en) * | 2014-05-08 | 2017-02-23 | Mitsubishi Chemical Corporation | Method for producing furfural, and method for producing furan |
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