JPS4878111A - - Google Patents
Info
- Publication number
- JPS4878111A JPS4878111A JP48006685A JP668573A JPS4878111A JP S4878111 A JPS4878111 A JP S4878111A JP 48006685 A JP48006685 A JP 48006685A JP 668573 A JP668573 A JP 668573A JP S4878111 A JPS4878111 A JP S4878111A
- Authority
- JP
- Japan
- 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.)
- Granted
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
- C07C45/81—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
- C07C45/83—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation by extractive distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2201865A DE2201865C3 (de) | 1972-01-15 | 1972-01-15 | Verfahren zur Herstellung methanolarmer, wäßriger Formaldehydlösungen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4878111A true JPS4878111A (en:Method) | 1973-10-20 |
| JPS5317574B2 JPS5317574B2 (en:Method) | 1978-06-09 |
Family
ID=5833094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP668573A Expired JPS5317574B2 (en:Method) | 1972-01-15 | 1973-01-16 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3853719A (en:Method) |
| JP (1) | JPS5317574B2 (en:Method) |
| BE (1) | BE794046A (en:Method) |
| DE (1) | DE2201865C3 (en:Method) |
| FR (1) | FR2168343B1 (en:Method) |
| GB (1) | GB1406144A (en:Method) |
| SE (1) | SE395687B (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4962235A (en) * | 1988-04-07 | 1990-10-09 | Asahi Kasei Kogyo Kabushiki Kaisha | Process for producing high purity formaldehyde |
| DE10062814A1 (de) | 2000-12-15 | 2002-06-20 | Ticona Gmbh | Verfahren zur Entfernung von Methanol aus formaldeyhdhaltigen Lösungen |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452414A (en) * | 1945-07-27 | 1948-10-26 | Skelly Oil Co | Concentrating and refining formaldehyde solutions by distillation with oxygenated hydrocarbon derivatives |
| US2678905A (en) * | 1949-11-17 | 1954-05-18 | Celanese Corp | Purification of aqueous formaldehyde solutions by extractive distillation |
| US2690994A (en) * | 1950-02-01 | 1954-10-05 | James F Mccants | Formaldehyde purification by use of alcohols |
| US3558719A (en) * | 1965-10-14 | 1971-01-26 | Exxon Research Engineering Co | Recovery of aqueous formaldehyde by extraction with an alkanol followed by distillation |
-
0
- BE BE794046D patent/BE794046A/xx not_active IP Right Cessation
-
1972
- 1972-01-15 DE DE2201865A patent/DE2201865C3/de not_active Expired
-
1973
- 1973-01-04 GB GB53373A patent/GB1406144A/en not_active Expired
- 1973-01-09 US US00322205A patent/US3853719A/en not_active Expired - Lifetime
- 1973-01-12 FR FR7301128A patent/FR2168343B1/fr not_active Expired
- 1973-01-12 SE SE7300451A patent/SE395687B/xx unknown
- 1973-01-16 JP JP668573A patent/JPS5317574B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2168343B1 (en:Method) | 1977-12-30 |
| BE794046A (fr) | 1973-07-16 |
| DE2201865B2 (de) | 1974-03-14 |
| DE2201865C3 (de) | 1974-12-19 |
| SE395687B (sv) | 1977-08-22 |
| FR2168343A1 (en:Method) | 1973-08-31 |
| US3853719A (en) | 1974-12-10 |
| JPS5317574B2 (en:Method) | 1978-06-09 |
| DE2201865A1 (de) | 1973-07-26 |
| GB1406144A (en) | 1975-09-17 |