ES290327A1 - Process for preparing a formaldehyde solution containing a stabilizer - Google Patents
Process for preparing a formaldehyde solution containing a stabilizerInfo
- Publication number
- ES290327A1 ES290327A1 ES0290327A ES290327A ES290327A1 ES 290327 A1 ES290327 A1 ES 290327A1 ES 0290327 A ES0290327 A ES 0290327A ES 290327 A ES290327 A ES 290327A ES 290327 A1 ES290327 A1 ES 290327A1
- Authority
- ES
- Spain
- Prior art keywords
- solution
- stage
- formaldehyde
- prepared
- cyanuric acid
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A stabilized aqueous solution of formaldehyde containing 15-60% by weight of water is prepared by introducing cyanuric acid during the formation of the solution in such an amount that the prepared solution contains 3-8 moles of formaldehyde per mole of cyanuric acid. An aqueous solution of formaldehyde which is dilute enough to be stable may be first prepared, cyanuric acid then added and water evaporated until the solution contains 15-60% of water. Alternatively the stable solution may be continuously prepared by supplying formaldehyde-containing gas to an absorption system comprising two or more stages in the first stage the gas is washed with an aqueous solution of formaldehyde and cyanuric acid and in the last stage gas not absorbed in the preceding stage(s) is washed in counter-current with water, the solution resulting from the absorption in the stage(s) after the first is used in conjunction with part of the solution produced in the preceding stage as washing liquid in that stage and the part of the solution produced in the first stage which is not recirculated is discharged from the system as final solution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL281505 | 1962-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES290327A1 true ES290327A1 (en) | 1963-08-16 |
Family
ID=19754012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0290327A Expired ES290327A1 (en) | 1962-07-27 | 1963-07-26 | Process for preparing a formaldehyde solution containing a stabilizer |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH453323A (en) |
| ES (1) | ES290327A1 (en) |
| GB (1) | GB974074A (en) |
| SE (1) | SE331274B (en) |
-
1963
- 1963-07-19 CH CH903363A patent/CH453323A/en unknown
- 1963-07-25 SE SE827263A patent/SE331274B/xx unknown
- 1963-07-26 ES ES0290327A patent/ES290327A1/en not_active Expired
- 1963-07-26 GB GB2983863A patent/GB974074A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB974074A (en) | 1964-11-04 |
| SE331274B (en) | 1970-12-21 |
| CH453323A (en) | 1968-06-14 |
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