GB895193A - Production of formaldehyde polymers and formaldehyde solutions - Google Patents
Production of formaldehyde polymers and formaldehyde solutionsInfo
- Publication number
- GB895193A GB895193A GB3830960A GB3830960A GB895193A GB 895193 A GB895193 A GB 895193A GB 3830960 A GB3830960 A GB 3830960A GB 3830960 A GB3830960 A GB 3830960A GB 895193 A GB895193 A GB 895193A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formaldehyde
- polymers
- production
- solutions
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/08—Polymerisation of formaldehyde
Abstract
Solid formaldehyde polymers are prepared by introducing into a concentrated aqueous solution of formaldehyde, the pH of which has been adjusted to from 9 to 10, 20 to 75% of a formaldehyde polymer (based on the formaldehyde present in the solution), keeping the temperature of the mixture at from 20 to 40 DEG C. to polymerize the formaldehyde and then separating the solid polymer from the aqueous solution obtained which has a formaldehyde content of from 29 to 40%. A part of the solid polymer formed may be used as the added polymer. Caustic potash may be used to adjust the pH. Apparatus for carrying out the process, which may be continuous or discontinuous is described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR814232A FR1253275A (en) | 1959-12-28 | 1959-12-28 | Process for treating a concentrated aqueous solution of formaldehyde with a view to obtaining, simultaneously, a solid polymer of formaldehyde, and a solution with a controlled concentration of formaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB895193A true GB895193A (en) | 1962-05-02 |
Family
ID=8723102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3830960A Expired GB895193A (en) | 1959-12-28 | 1960-11-08 | Production of formaldehyde polymers and formaldehyde solutions |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE597457A (en) |
| CH (1) | CH396415A (en) |
| DE (1) | DE1161021B (en) |
| FR (1) | FR1253275A (en) |
| GB (1) | GB895193A (en) |
| LU (1) | LU39467A1 (en) |
| NL (1) | NL130323C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES290018A1 (en) * | 1962-07-17 | 1963-12-01 | Montedison Spa | Water-soluble paraformaldehyde compositions |
-
1959
- 1959-12-28 FR FR814232A patent/FR1253275A/en not_active Expired
-
1960
- 1960-11-08 GB GB3830960A patent/GB895193A/en not_active Expired
- 1960-11-24 BE BE597457A patent/BE597457A/en unknown
- 1960-11-24 CH CH1316960A patent/CH396415A/en unknown
- 1960-11-28 LU LU39467D patent/LU39467A1/xx unknown
- 1960-12-20 NL NL259254A patent/NL130323C/xx active
- 1960-12-24 DE DEH41315A patent/DE1161021B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| LU39467A1 (en) | 1961-01-28 |
| CH396415A (en) | 1965-07-31 |
| DE1161021B (en) | 1964-01-09 |
| NL259254A (en) | 1964-04-27 |
| NL130323C (en) | 1970-07-15 |
| FR1253275A (en) | 1961-02-10 |
| BE597457A (en) | 1961-03-15 |
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