GB955015A - Improvements in or relating to the production of anhydrous formaldehyde monomer - Google Patents
Improvements in or relating to the production of anhydrous formaldehyde monomerInfo
- Publication number
- GB955015A GB955015A GB41400/60D GB4140060D GB955015A GB 955015 A GB955015 A GB 955015A GB 41400/60 D GB41400/60 D GB 41400/60D GB 4140060 D GB4140060 D GB 4140060D GB 955015 A GB955015 A GB 955015A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formaldehyde
- inert liquid
- inert
- liquid medium
- concentrate
- 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
- C07C47/00—Compounds having —CHO groups
- C07C47/02—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen
- C07C47/04—Formaldehyde
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Anhydrous formaldehyde monomer is produced by a process wherein formaldehyde concentrate is heated in a distillation vessel with an inert liquid medium under distillation conditions at a temperature of at least 80 DEG C. whereby the liquid medium is evaporated and the formaldehyde concentrate is decomposed to form gaseous formaldehyde monomer, the evolved gases are cooled to condense inert liquid and water therefrom and gaseous formaldehyde is removed from the zone of condensation, "formaldehyde concentrate" being defined as "a material comprising formaldehyde for the most part, generally in the form of a low polymer, together with an appreciable amount of water", the term "inert liquid medium" signifying compounds which are inert to formaldehyde such as hydrocarbons, esters and ethers. The condensate is preferably run off to a separating vessel, the aqueous layer being discarded and the inert liquid layer being returned to the distillation vessel. An inert gas may be passed through the zone of condensation of the inert liquid. Examples are given in which the inert liquid is a petrol fraction, n-butyl acetate or decahydronaphthalene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB41400/60D GB955015A (en) | 1961-11-20 | 1961-11-20 | Improvements in or relating to the production of anhydrous formaldehyde monomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB41400/60D GB955015A (en) | 1961-11-20 | 1961-11-20 | Improvements in or relating to the production of anhydrous formaldehyde monomer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB955015A true GB955015A (en) | 1964-04-08 |
Family
ID=10419522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB41400/60D Expired GB955015A (en) | 1961-11-20 | 1961-11-20 | Improvements in or relating to the production of anhydrous formaldehyde monomer |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB955015A (en) |
-
1961
- 1961-11-20 GB GB41400/60D patent/GB955015A/en not_active Expired
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