GB1226695A - - Google Patents
Info
- Publication number
- GB1226695A GB1226695A GB1226695DA GB1226695A GB 1226695 A GB1226695 A GB 1226695A GB 1226695D A GB1226695D A GB 1226695DA GB 1226695 A GB1226695 A GB 1226695A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dianhydride
- aromatic
- dianhydrides
- dioxane
- complex
- 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
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 abstract 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellitic acid Chemical compound OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 abstract 2
- 125000003118 aryl group Chemical group 0.000 abstract 1
- DMLAVOWQYNRWNQ-UHFFFAOYSA-N azobenzene Chemical compound C1=CC=CC=C1N=NC1=CC=CC=C1 DMLAVOWQYNRWNQ-UHFFFAOYSA-N 0.000 abstract 1
- GAUZCKBSTZFWCT-UHFFFAOYSA-N azoxybenzene Chemical compound C=1C=CC=CC=1[N+]([O-])=NC1=CC=CC=C1 GAUZCKBSTZFWCT-UHFFFAOYSA-N 0.000 abstract 1
- 125000006159 dianhydride group Chemical group 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
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)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR151198 | 1968-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1226695A true GB1226695A (enrdf_load_html_response) | 1971-03-31 |
Family
ID=8650038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1226695D Expired GB1226695A (enrdf_load_html_response) | 1968-05-09 | 1969-05-09 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1923845A1 (enrdf_load_html_response) |
| FR (1) | FR1574843A (enrdf_load_html_response) |
| GB (1) | GB1226695A (enrdf_load_html_response) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2416913A1 (fr) * | 1978-02-09 | 1979-09-07 | Hitachi Chemical Co Ltd | Procede de fabrication de produits intermediaires du type polyamide a fonctions acides destines a etre utilises pour l'isolation de semi-conducteur |
| EP0429775A3 (en) * | 1989-09-01 | 1992-05-27 | Hitachi, Ltd. | Carboxylic acid anhydride complexes and their preparation and use |
-
1968
- 1968-05-09 FR FR1574843D patent/FR1574843A/fr not_active Expired
-
1969
- 1969-05-09 DE DE19691923845 patent/DE1923845A1/de not_active Withdrawn
- 1969-05-09 GB GB1226695D patent/GB1226695A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2416913A1 (fr) * | 1978-02-09 | 1979-09-07 | Hitachi Chemical Co Ltd | Procede de fabrication de produits intermediaires du type polyamide a fonctions acides destines a etre utilises pour l'isolation de semi-conducteur |
| EP0429775A3 (en) * | 1989-09-01 | 1992-05-27 | Hitachi, Ltd. | Carboxylic acid anhydride complexes and their preparation and use |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1574843A (enrdf_load_html_response) | 1969-07-18 |
| DE1923845A1 (de) | 1969-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS525800A (en) | Method of purifying stevioside | |
| ES470689A1 (es) | Un procedimiento para la preparacion de acido 7-metoxi-7- (4-metilen sustituido-1,3-ditietan-2-il-carboxamido)-3-hete-rociclotiometil-3-cefem-4-carboxilico | |
| GB1226695A (enrdf_load_html_response) | ||
| GB1473602A (enrdf_load_html_response) | ||
| GB1189607A (en) | Purification Process | |
| GB1376508A (en) | Purification of cyanuric acid | |
| JPS52108946A (en) | Production of purified terephthalic acid | |
| JPS5283315A (en) | Purification of acetic acid | |
| GB1393867A (en) | Process of pyromellitic dianhydride | |
| KR840008008A (ko) | 나프탈렌의 공기산화에 의해 생성된 프탈산무수물로부터 나프토퀴논의 제거방법 | |
| JPS5278839A (en) | Purification of 2, 3-xylidine | |
| GB1121478A (en) | Improvements in the purification of pyromellitic dianhydride and/or acid | |
| CA1024520A (en) | Purification of pyromellitic dianhydride | |
| GB1411526A (en) | Process for purifying a phthalic acid or a naphthene dicarboxylic acid | |
| ES401989A1 (es) | Procedimiento para la fabricacion de dianhidrido piromeli- tico puro. | |
| JPS5262207A (en) | Purification process for chloroform | |
| GB941903A (en) | Process for the recovery of pure phthalic anhydride from the crude product obtained by the oxidation of o-xylene | |
| GB1339101A (en) | Production of phenylalanine derivatives | |
| US4048197A (en) | 2,3,3',4'-Biphenyltetracarboxylic acid dianhydride | |
| ES218984A1 (es) | Procedimiento para la purificacion de anhidrido acético preparado por absorcion de ceteno en acido acetico | |
| GB750847A (en) | Improvements in or relating to purification of citrazinic acid | |
| GB1303282A (enrdf_load_html_response) | ||
| GB1549533A (en) | Process for the purification of phthalic anhydride | |
| CA524213A (en) | Purification of caprolactam or lactams obtained from polyamide waste | |
| JPS52142087A (en) | Purification of alpha-amino-epsilon-caprolactam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |