FR2134513A1 - Colourless pyromellitic acid - by treating aqs soln of acid with activated charcoal - Google Patents
Colourless pyromellitic acid - by treating aqs soln of acid with activated charcoalInfo
- Publication number
- FR2134513A1 FR2134513A1 FR7214715A FR7214715A FR2134513A1 FR 2134513 A1 FR2134513 A1 FR 2134513A1 FR 7214715 A FR7214715 A FR 7214715A FR 7214715 A FR7214715 A FR 7214715A FR 2134513 A1 FR2134513 A1 FR 2134513A1
- Authority
- FR
- France
- Prior art keywords
- acid
- colourless
- activated charcoal
- treating
- soln
- 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.)
- Granted
Links
- 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 title abstract 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract 4
- 239000002253 acid Substances 0.000 title abstract 2
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000004014 plasticizer Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 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
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH467971A CH539597A (de) | 1971-04-26 | 1971-04-26 | Verfahren zur Herstellung von farbloser Pyromellithsäure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2134513A1 true FR2134513A1 (en) | 1972-12-08 |
| FR2134513B1 FR2134513B1 (cs) | 1975-06-20 |
Family
ID=4280583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7214715A Granted FR2134513A1 (en) | 1971-04-26 | 1972-04-25 | Colourless pyromellitic acid - by treating aqs soln of acid with activated charcoal |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE781730A (cs) |
| CH (1) | CH539597A (cs) |
| FR (1) | FR2134513A1 (cs) |
| IT (1) | IT959635B (cs) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2481287A1 (fr) * | 1980-04-25 | 1981-10-30 | Akzo Nv | Procede pour la preparation et la purification d'anhydrides d'acides dicarboxyliques et polycarboxyliques |
| EP1199298A1 (en) * | 2000-08-23 | 2002-04-24 | Mitsubishi Gas Chemical Company, Inc. | Process for producing refined pyromellitic acid and refined pyromellitic anhydride |
| CN115504877A (zh) * | 2021-06-23 | 2022-12-23 | 中国石油化工股份有限公司 | 提纯均四苯甲酸的方法 |
-
1971
- 1971-04-26 CH CH467971A patent/CH539597A/de not_active IP Right Cessation
-
1972
- 1972-04-06 BE BE781730A patent/BE781730A/xx unknown
- 1972-04-22 IT IT2348272A patent/IT959635B/it active
- 1972-04-25 FR FR7214715A patent/FR2134513A1/fr active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2481287A1 (fr) * | 1980-04-25 | 1981-10-30 | Akzo Nv | Procede pour la preparation et la purification d'anhydrides d'acides dicarboxyliques et polycarboxyliques |
| EP1199298A1 (en) * | 2000-08-23 | 2002-04-24 | Mitsubishi Gas Chemical Company, Inc. | Process for producing refined pyromellitic acid and refined pyromellitic anhydride |
| US6579990B2 (en) | 2000-08-23 | 2003-06-17 | Mitsubishi Gas Chemical Company, Inc. | Process for producing refined pyromellitic acid and refined pyromellitic anhydride |
| CN115504877A (zh) * | 2021-06-23 | 2022-12-23 | 中国石油化工股份有限公司 | 提纯均四苯甲酸的方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| BE781730A (fr) | 1972-07-31 |
| CH539597A (de) | 1973-07-31 |
| FR2134513B1 (cs) | 1975-06-20 |
| IT959635B (it) | 1973-11-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |