NL6904891A - - Google Patents
Info
- Publication number
- NL6904891A NL6904891A NL6904891A NL6904891A NL6904891A NL 6904891 A NL6904891 A NL 6904891A NL 6904891 A NL6904891 A NL 6904891A NL 6904891 A NL6904891 A NL 6904891A NL 6904891 A NL6904891 A NL 6904891A
- Authority
- NL
- Netherlands
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
- B01D3/146—Multiple effect distillation
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- 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)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Furan Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681768094 DE1768094C3 (de) | 1968-03-30 | 1968-03-30 | Verfahren zur Gewinnung von reinem Phthalsäureanhydrid durch zweistufige kontinuierliche Destillation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6904891A true NL6904891A (de) | 1969-10-02 |
Family
ID=5699594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6904891A NL6904891A (de) | 1968-03-30 | 1969-03-28 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS503304B1 (de) |
| DE (1) | DE1768094C3 (de) |
| FR (1) | FR2005183A1 (de) |
| NL (1) | NL6904891A (de) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1227443B (de) * | 1964-03-24 | 1966-10-27 | Metallgesellschaft Ag | Verfahren zur Gewinnung von reinem Phthalsaeureanhydrid |
| FR1427484A (fr) * | 1964-03-24 | 1966-02-04 | Metallgesellschaft Ag | Procédé de fabrication d'anhydride phtalique pur |
-
1968
- 1968-03-30 DE DE19681768094 patent/DE1768094C3/de not_active Expired
-
1969
- 1969-03-28 NL NL6904891A patent/NL6904891A/xx unknown
- 1969-03-28 FR FR6909480A patent/FR2005183A1/fr not_active Withdrawn
- 1969-03-31 JP JP2392169A patent/JPS503304B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1768094C3 (de) | 1973-10-04 |
| DE1768094A1 (de) | 1972-03-09 |
| DE1768094B2 (de) | 1973-03-01 |
| FR2005183A1 (en) | 1969-12-05 |
| JPS503304B1 (de) | 1975-02-03 |