GB851876A - A process of preparing formaldehyde in stable form and formaldehyde-containing compositions produced thereby - Google Patents
A process of preparing formaldehyde in stable form and formaldehyde-containing compositions produced therebyInfo
- Publication number
- GB851876A GB851876A GB732/58A GB73258A GB851876A GB 851876 A GB851876 A GB 851876A GB 732/58 A GB732/58 A GB 732/58A GB 73258 A GB73258 A GB 73258A GB 851876 A GB851876 A GB 851876A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formaldehyde
- acceptor
- dispersion
- phenol
- temperature
- 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
- 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
- C07C45/86—Use of additives, e.g. for stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
A stable composition of formaldehyde is obtained by contacting formaldehyde in substantially gaseous and monomeric form at 80-400 DEG C. with a chemically active acceptor comprising urea, melamine, thiourea, phenol or a monoor dialkyl substituted phenol, the acceptor being a liquid or in suspension or solution, in the presence of at least a catalylic amount of water, the formaldehyde and acceptor dispersion being maintained at a pH in the range 3,5-5.5 and at a temperature between 50 DEG C. and the boiling temperature of the dispersion. The products are used in the preparation of condensation resins based on the acceptor used.ALSO:A stable composition of formaldehyde is obtained by contacting formaldehyde is substantially gaseous and monomeric form at 80-400 DEG C. with an acceptor comprising urea, melamine, thiourea, phenol or a mono-or dialkyl substituted phenol, the acceptor being a liquid or in suspension or solution, in the presence of at least a catalytic amount of water, the formaldehyde and acceptor dispersion being maintained at a pH in the range 3,5-5,5 and at a temperature between 50 DEG C. and the boiling temperature of the dispersion. Advantageously the formaldehyde may be used directly from a dehydrogenation or oxidation unit in which it is being made from methanol. To obtain the correct pH value an alkali, such as sodium or potassium hydroxide, triethanolamine, borax or sodium carbonate is added to the mixture.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US851876XA | 1957-02-08 | 1957-02-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB851876A true GB851876A (en) | 1960-10-19 |
Family
ID=22190010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB732/58A Expired GB851876A (en) | 1957-02-08 | 1958-01-08 | A process of preparing formaldehyde in stable form and formaldehyde-containing compositions produced thereby |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB851876A (en) |
-
1958
- 1958-01-08 GB GB732/58A patent/GB851876A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB588268A (en) | Improvements in or relating to baths for electroplating with zinc or alloys consisting principally of zinc | |
| GB822929A (en) | Process for the production of stable solutions of hardenable condensation products of melamine, thiourea and formaldehyde | |
| GB851876A (en) | A process of preparing formaldehyde in stable form and formaldehyde-containing compositions produced thereby | |
| GB919808A (en) | Production of aqueous modified melamine-formaldehyde resinous compositions | |
| GB838097A (en) | Process for preparing formaldehyde in stable form | |
| GB936620A (en) | Process for the production of a stable solution of melamine formaldehyde condensation products | |
| GB592827A (en) | Improvements in or relating to the manufacture of phenoxyalkylcarboxylic compounds | |
| GB855536A (en) | Melamine-formaldehyde polyvinyl alcohol resin and process of preparing same | |
| GB738033A (en) | Improvements in or relating to the preparation of melamine-formaldehyde syrups | |
| GB961645A (en) | Process for the production of 1,1-dimethylol cyclohex-3-ene | |
| GB904780A (en) | Manufacture of trimethylol alkanes | |
| GB361597A (en) | Improvements in the manufacture and production of dimethylol acetone and its homologues | |
| GB872185A (en) | Resin syrups | |
| GB730602A (en) | Formaldehyde solutions | |
| GB838914A (en) | Production of chloroprene | |
| GB951887A (en) | Production of condensation products of vinylsulphonamide and formaldehyde | |
| GB323693A (en) | Improvements in the saccharification of wood and other cellulosic materials | |
| GB616456A (en) | Improvements in or relating to the production of normal lead dinitroresorcinate | |
| GB834100A (en) | Improvements in the preparation of mixed aldols | |
| GB590684A (en) | Improvements in the production of phenolic condensation products and treatment of materials therewith | |
| GB930289A (en) | Improvements in or relating to the preparation of sodium cyclohexylsulphamate | |
| GB585299A (en) | Improvements in or relating to the manufacture of aldol | |
| GB889260A (en) | Process for the preparation of stable resin syrups | |
| GB1092632A (en) | Improved process for the production of n-methylol formamide | |
| GB806871A (en) | Cation exchange resins suitable for medicinal use |