FR2367759B1 - - Google Patents
Info
- Publication number
- FR2367759B1 FR2367759B1 FR7731062A FR7731062A FR2367759B1 FR 2367759 B1 FR2367759 B1 FR 2367759B1 FR 7731062 A FR7731062 A FR 7731062A FR 7731062 A FR7731062 A FR 7731062A FR 2367759 B1 FR2367759 B1 FR 2367759B1
- Authority
- FR
- France
- 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
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/54—Preparation of carboxylic acid anhydrides
- C07C51/573—Separation; Purification; Stabilisation; Use of additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Furan Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762646808 DE2646808C3 (en) | 1976-10-16 | 1976-10-16 | Process for the purification of phthalic anhydride obtained in the course of the anthraquinone production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2367759A1 FR2367759A1 (en) | 1978-05-12 |
| FR2367759B1 true FR2367759B1 (en) | 1982-11-12 |
Family
ID=5990635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7731062A Granted FR2367759A1 (en) | 1976-10-16 | 1977-10-14 | PHTHALIC ANHYDRIDE PURIFICATION PROCESS |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5845436B2 (en) |
| BE (1) | BE859720A (en) |
| CH (1) | CH633549A5 (en) |
| DE (1) | DE2646808C3 (en) |
| FR (1) | FR2367759A1 (en) |
| GB (1) | GB1549533A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114853705A (en) * | 2022-04-24 | 2022-08-05 | 河北海力香料股份有限公司 | Method for preparing chlorophthalic anhydride by recovering 4-chlorophthalic acid monosodium salt reaction mother liquor |
| CN117986217B (en) * | 2024-04-03 | 2024-06-04 | 南京化学试剂股份有限公司 | Phthalic anhydride raw material treatment method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR648163A (en) * | 1927-05-13 | 1928-12-06 | Cie Nat Matieres Colorantes | Process for the purification of crude phthalic anhydride obtained by catalysis |
| FR1429745A (en) * | 1964-04-02 | 1966-02-25 | Basf Ag | Process for the production of pure phthalic anhydride from o-xylene |
| DE2245555C2 (en) * | 1972-09-16 | 1982-06-09 | Bayer Ag, 5090 Leverkusen | Process for the production of anthraquinone |
| RO59914A (en) * | 1972-04-15 | 1976-06-15 |
-
1976
- 1976-10-16 DE DE19762646808 patent/DE2646808C3/en not_active Expired
-
1977
- 1977-10-11 CH CH1241677A patent/CH633549A5/en not_active IP Right Cessation
- 1977-10-12 GB GB4245977A patent/GB1549533A/en not_active Expired
- 1977-10-14 JP JP52122558A patent/JPS5845436B2/en not_active Expired
- 1977-10-14 FR FR7731062A patent/FR2367759A1/en active Granted
- 1977-10-14 BE BE2056340A patent/BE859720A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH633549A5 (en) | 1982-12-15 |
| FR2367759A1 (en) | 1978-05-12 |
| DE2646808C3 (en) | 1979-09-20 |
| GB1549533A (en) | 1979-08-08 |
| JPS5350132A (en) | 1978-05-08 |
| DE2646808A1 (en) | 1978-04-20 |
| JPS5845436B2 (en) | 1983-10-08 |
| BE859720A (en) | 1978-04-14 |
| DE2646808B2 (en) | 1979-01-25 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |