NL6706981A - - Google Patents
Info
- Publication number
- NL6706981A NL6706981A NL6706981A NL6706981A NL6706981A NL 6706981 A NL6706981 A NL 6706981A NL 6706981 A NL6706981 A NL 6706981A NL 6706981 A NL6706981 A NL 6706981A NL 6706981 A NL6706981 A NL 6706981A
- 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)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1966B0087234 DE1266748C2 (de) | 1966-05-21 | 1966-05-21 | Verfahren zur Verhinderung der Verkrustung von Heizflaechen bei der kontinuierlichen Destillation von Phthalsaeureanhydrid |
| DE1618136A DE1618136C3 (de) | 1966-05-21 | 1967-04-15 | Verfahren zur destillativen Reinigung von Phthalsäureanhydrid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6706981A true NL6706981A (xx) | 1967-11-22 |
Family
ID=25967897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6706981A NL6706981A (xx) | 1966-05-21 | 1967-05-19 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3420750A (xx) |
| AT (1) | AT269850B (xx) |
| BE (1) | BE698804A (xx) |
| CH (1) | CH479523A (xx) |
| DE (2) | DE1266748C2 (xx) |
| GB (1) | GB1180117A (xx) |
| NL (1) | NL6706981A (xx) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3650906A (en) * | 1968-04-13 | 1972-03-21 | Zieren Chemiebau Gmbh Dr A | Thin film heating for the preliminary purification of crude phthalic anhydride |
| DE1814774B1 (de) * | 1968-12-14 | 1969-12-04 | Zieren Chemiebau Gmbh Dr A | Verfahren zur Gewinnung von reinem Phthalsaeureanhydrid |
| FR2224435B1 (xx) * | 1973-04-05 | 1976-11-12 | Rhone Progil | |
| US4397768A (en) * | 1981-02-26 | 1983-08-09 | Oxidaciones Organicas, C.A. "Oxidor" | Supported catalyst for the preparation of phthalic anhydride |
| DE3504146A1 (de) * | 1985-02-07 | 1986-08-07 | Basf Ag, 6700 Ludwigshafen | Verfahren zur gewinnung von hochreinem maleinsaeureanhydrid aus rohem maleinsaeureanhydrid |
| DE19939629A1 (de) | 1999-08-20 | 2001-02-22 | Basf Ag | Verfahren zur Herstellung von spezifikationsgerechtem Phthalsäureanhydrid |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR545132A (fr) * | 1920-11-05 | 1922-10-06 | Machine pour rouler les cigarillos et autres articles analogues | |
| NL46159C (xx) * | 1936-02-15 | |||
| US2128323A (en) * | 1937-04-15 | 1938-08-30 | Solvay Process Co | Phthalic acid manufacture |
| GB795229A (en) * | 1955-12-12 | 1958-05-21 | Dominion Tar & Chemical Co | Improvements in or relating to phthalic anhydride |
| US3054729A (en) * | 1958-11-28 | 1962-09-18 | Arthur F Smith | Distillation film wiping apparatus |
| US3011955A (en) * | 1959-06-04 | 1961-12-05 | Scient Design Co | Purification of phthalic anhydride |
| BE597012A (xx) * | 1959-07-13 | |||
| US3084110A (en) * | 1959-12-23 | 1963-04-02 | Phillips Petroleum Co | Method and apparatus for preventing stagnation near the reboiler of a distillation tower |
| DE1167810B (de) * | 1960-11-12 | 1964-04-16 | Basf Ag | Verfahren zur Gewinnung von reinem Phthalsaeureanhydrid |
| DE1227443B (de) * | 1964-03-24 | 1966-10-27 | Metallgesellschaft Ag | Verfahren zur Gewinnung von reinem Phthalsaeureanhydrid |
| FR1471085A (fr) * | 1965-05-04 | 1967-02-24 | Metallgesellschaft Ag | Procédé de fabrication d'anhydride phtalique de très grande pureté |
| US3289734A (en) * | 1965-08-17 | 1966-12-06 | Nalco Chemical Co | Scale deposition inhibition in black liquor multiple effect concentration processes using a styrene copolymer |
-
1966
- 1966-05-21 DE DE1966B0087234 patent/DE1266748C2/de not_active Expired
-
1967
- 1967-04-15 DE DE1618136A patent/DE1618136C3/de not_active Expired
- 1967-05-12 CH CH673667A patent/CH479523A/de not_active IP Right Cessation
- 1967-05-19 AT AT470967A patent/AT269850B/de active
- 1967-05-19 US US639829A patent/US3420750A/en not_active Expired - Lifetime
- 1967-05-19 NL NL6706981A patent/NL6706981A/xx unknown
- 1967-05-19 GB GB23398/67A patent/GB1180117A/en not_active Expired
- 1967-05-22 BE BE698804D patent/BE698804A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE1618136A1 (de) | 1971-03-11 |
| DE1618136C3 (de) | 1983-04-07 |
| DE1266748B (de) | 1968-04-25 |
| GB1180117A (en) | 1970-02-04 |
| US3420750A (en) | 1969-01-07 |
| DE1618136B2 (de) | 1977-01-27 |
| DE1266748C2 (de) | 1973-07-19 |
| BE698804A (xx) | 1967-11-22 |
| CH479523A (de) | 1969-10-15 |
| AT269850B (de) | 1969-04-10 |