NL6905713A - - Google Patents
Info
- Publication number
- NL6905713A NL6905713A NL6905713A NL6905713A NL6905713A NL 6905713 A NL6905713 A NL 6905713A NL 6905713 A NL6905713 A NL 6905713A NL 6905713 A NL6905713 A NL 6905713A NL 6905713 A NL6905713 A NL 6905713A
- 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
- C07C51/54—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)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Furan Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681768211 DE1768211C3 (de) | 1968-04-13 | Verfahren zur kontinuierlichen Vorreinigung von aus o-Xylol hergestelltem rohem Phthalsäureanhydrid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6905713A true NL6905713A (xx) | 1969-10-15 |
Family
ID=5699644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6905713A NL6905713A (xx) | 1968-04-13 | 1969-04-14 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3650906A (xx) |
| NL (1) | NL6905713A (xx) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214157A (en) * | 1991-05-07 | 1993-05-25 | Exxon Chemical Patents Inc. | Process for the disposal of phthalic anhydride decomposer vapors |
| US5145971A (en) * | 1991-10-25 | 1992-09-08 | Occidental Chemical Corporation | Process for the preparation of oxydiphthalic acid and purified oxydiphthalic anhydride from crude oxydiphthalic anhydride |
| US5508443A (en) * | 1994-05-12 | 1996-04-16 | Exxon Chemical Patents Inc. | Liquid phthalic anhydride recovery process |
| DE19500031A1 (de) * | 1995-01-02 | 1996-07-04 | Basf Ag | Verfahren zur Herstellung von 3-Chlorphthalsäureanhydrid |
| US5730844A (en) * | 1996-11-29 | 1998-03-24 | Exxon Chemical Patents Inc. | Liquid phthalic anhydride recovery process using a rectification tower with benzoic acid control |
| US5718808A (en) * | 1996-11-29 | 1998-02-17 | Exxon Chemical Patents Inc. | Solvent assisted process for recovery of phthalic anhydride in the liquid phase by distillation |
| US5869700A (en) * | 1997-02-21 | 1999-02-09 | Exxon Chemical Patents Inc. | Method for recovering phthalic anhydride/maleic anhydride mixtures by distillation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3011955A (en) * | 1959-06-04 | 1961-12-05 | Scient Design Co | Purification of phthalic anhydride |
| CH390222A (de) * | 1960-11-14 | 1965-04-15 | Luwa Ag | Dünnschichtbehandlungsapparat |
| AT256053B (de) * | 1963-12-20 | 1967-08-10 | Inventa Ag | Flüssigkeits-Kaskaden-Reaktor |
| DE1266748C2 (de) * | 1966-05-21 | 1973-07-19 | Basf Ag | Verfahren zur Verhinderung der Verkrustung von Heizflaechen bei der kontinuierlichen Destillation von Phthalsaeureanhydrid |
| US3428423A (en) * | 1966-06-07 | 1969-02-18 | Chem Process Corp | Method for the removal and recovery of promoter from crude phthalic anhydride made by the vapor phase oxidation of orthoxylene in the presence of promoter |
-
1969
- 1969-04-14 NL NL6905713A patent/NL6905713A/xx unknown
- 1969-04-14 US US816112A patent/US3650906A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE1768211A1 (de) | 1972-02-24 |
| US3650906A (en) | 1972-03-21 |