NL7205522A - - Google Patents
Info
- Publication number
- NL7205522A NL7205522A NL7205522A NL7205522A NL7205522A NL 7205522 A NL7205522 A NL 7205522A NL 7205522 A NL7205522 A NL 7205522A NL 7205522 A NL7205522 A NL 7205522A NL 7205522 A NL7205522 A NL 7205522A
- Authority
- NL
- Netherlands
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
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
- C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
-
- 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
- C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH525871A CH540217A (de) | 1971-04-26 | 1971-04-26 | Verfahren zur Herstellung von reinem Pyromellithsäuredianhydrid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7205522A true NL7205522A (ref) | 1972-10-30 |
Family
ID=4290581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7205522A NL7205522A (ref) | 1971-04-26 | 1972-04-24 |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE781732A (ref) |
| CH (1) | CH540217A (ref) |
| DE (1) | DE2151238A1 (ref) |
| ES (1) | ES401989A1 (ref) |
| FR (1) | FR2134514A1 (ref) |
| IT (1) | IT953752B (ref) |
| NL (1) | NL7205522A (ref) |
| ZA (1) | ZA722810B (ref) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6579990B2 (en) * | 2000-08-23 | 2003-06-17 | Mitsubishi Gas Chemical Company, Inc. | Process for producing refined pyromellitic acid and refined pyromellitic anhydride |
-
1971
- 1971-04-26 CH CH525871A patent/CH540217A/de not_active IP Right Cessation
- 1971-10-14 DE DE19712151238 patent/DE2151238A1/de active Pending
-
1972
- 1972-04-06 BE BE781732A patent/BE781732A/xx unknown
- 1972-04-21 ES ES401989A patent/ES401989A1/es not_active Expired
- 1972-04-24 IT IT23510/72A patent/IT953752B/it active
- 1972-04-24 NL NL7205522A patent/NL7205522A/xx unknown
- 1972-04-25 FR FR7214716A patent/FR2134514A1/fr active Granted
- 1972-04-26 ZA ZA722810A patent/ZA722810B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2134514A1 (en) | 1972-12-08 |
| ES401989A1 (es) | 1975-03-01 |
| ZA722810B (en) | 1973-02-28 |
| DE2151238A1 (de) | 1972-12-21 |
| CH540217A (de) | 1973-08-15 |
| BE781732A (fr) | 1972-07-31 |
| FR2134514B1 (ref) | 1975-06-20 |
| IT953752B (it) | 1973-08-10 |