CH502976A - Verfahren zur Reinigung von Methylglyoxal - Google Patents
Verfahren zur Reinigung von MethylglyoxalInfo
- Publication number
- CH502976A CH502976A CH425369A CH425369A CH502976A CH 502976 A CH502976 A CH 502976A CH 425369 A CH425369 A CH 425369A CH 425369 A CH425369 A CH 425369A CH 502976 A CH502976 A CH 502976A
- Authority
- CH
- Switzerland
- Prior art keywords
- methylglyoxal
- purifying
- purifying methylglyoxal
- Prior art date
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
- C07C45/84—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation by azeotropic distillation
-
- 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
- C07C45/80—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
-
- 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
-
- 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
-
- 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
- C07C45/85—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to a chemical modification
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S203/00—Distillation: processes, separatory
- Y10S203/11—Batch distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71480768A | 1968-03-21 | 1968-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH502976A true CH502976A (de) | 1971-02-15 |
Family
ID=24871539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH425369A CH502976A (de) | 1968-03-21 | 1969-03-20 | Verfahren zur Reinigung von Methylglyoxal |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3657074A (de) |
| BE (1) | BE730153A (de) |
| CH (1) | CH502976A (de) |
| FR (1) | FR2004389A1 (de) |
| GB (1) | GB1210613A (de) |
| NL (1) | NL6903919A (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL52430C (de) * | 1937-10-28 | |||
| GB666435A (en) * | 1948-06-14 | 1952-02-13 | British Celanese | Purifying methyl ethyl ketone by a distillation and extraction process |
| US2866823A (en) * | 1956-12-14 | 1958-12-30 | Union Carbide Corp | Process for the removal of formaldehyde from crude pyruvic aldehyde solution |
| US3419477A (en) * | 1967-11-02 | 1968-12-31 | Day & Zimmermann Inc | Process for purifying acetone by azeotropic distillation with an alkylchloride |
-
1968
- 1968-03-21 US US714807A patent/US3657074A/en not_active Expired - Lifetime
-
1969
- 1969-03-13 NL NL6903919A patent/NL6903919A/xx unknown
- 1969-03-19 FR FR6907856A patent/FR2004389A1/fr not_active Withdrawn
- 1969-03-20 BE BE730153D patent/BE730153A/xx unknown
- 1969-03-20 CH CH425369A patent/CH502976A/de not_active IP Right Cessation
- 1969-03-21 GB GB05085/69A patent/GB1210613A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3657074A (en) | 1972-04-18 |
| GB1210613A (en) | 1970-10-28 |
| NL6903919A (de) | 1969-09-23 |
| DE1914038B2 (de) | 1975-09-25 |
| BE730153A (de) | 1969-09-01 |
| FR2004389A1 (de) | 1969-11-21 |
| DE1914038A1 (de) | 1969-10-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |