GB1549533A - Process for the purification of phthalic anhydride - Google Patents
Process for the purification of phthalic anhydrideInfo
- Publication number
- GB1549533A GB1549533A GB4245977A GB4245977A GB1549533A GB 1549533 A GB1549533 A GB 1549533A GB 4245977 A GB4245977 A GB 4245977A GB 4245977 A GB4245977 A GB 4245977A GB 1549533 A GB1549533 A GB 1549533A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phthalic anhydride
- purification
- crystallising
- plasticisers
- purified
- 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.)
- Expired
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)
- Furan Compounds (AREA)
Abstract
Crude phthalic anhydride is purified by crystallising it from acetic acid. The resulting phthalic anhydride is of high purity and may be used for the preparation of plasticisers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19762646808 DE2646808C3 (en) | 1976-10-16 | 1976-10-16 | Process for the purification of phthalic anhydride obtained in the course of the anthraquinone production |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1549533A true GB1549533A (en) | 1979-08-08 |
Family
ID=5990635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4245977A Expired GB1549533A (en) | 1976-10-16 | 1977-10-12 | Process for the purification of phthalic anhydride |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5845436B2 (en) |
BE (1) | BE859720A (en) |
CH (1) | CH633549A5 (en) |
DE (1) | DE2646808C3 (en) |
FR (1) | FR2367759A1 (en) |
GB (1) | GB1549533A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117986217A (en) * | 2024-04-03 | 2024-05-07 | 南京化学试剂股份有限公司 | Method for treating high-content phthalic anhydride raw material |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114853705A (en) * | 2022-04-24 | 2022-08-05 | 河北海力香料股份有限公司 | Method for preparing chlorophthalic anhydride by recovering 4-chlorophthalic acid monosodium salt reaction mother liquor |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR648163A (en) * | 1927-05-13 | 1928-12-06 | Cie Nat Matieres Colorantes | Process for the purification of crude phthalic anhydride obtained by catalysis |
FR1429745A (en) * | 1964-04-02 | 1966-02-25 | Basf Ag | Process for the production of pure phthalic anhydride from o-xylene |
DE2245555C2 (en) * | 1972-09-16 | 1982-06-09 | Bayer Ag, 5090 Leverkusen | Process for the production of anthraquinone |
RO59914A (en) * | 1972-04-15 | 1976-06-15 |
-
1976
- 1976-10-16 DE DE19762646808 patent/DE2646808C3/en not_active Expired
-
1977
- 1977-10-11 CH CH1241677A patent/CH633549A5/en not_active IP Right Cessation
- 1977-10-12 GB GB4245977A patent/GB1549533A/en not_active Expired
- 1977-10-14 FR FR7731062A patent/FR2367759A1/en active Granted
- 1977-10-14 BE BE2056340A patent/BE859720A/en unknown
- 1977-10-14 JP JP52122558A patent/JPS5845436B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117986217A (en) * | 2024-04-03 | 2024-05-07 | 南京化学试剂股份有限公司 | Method for treating high-content phthalic anhydride raw material |
CN117986217B (en) * | 2024-04-03 | 2024-06-04 | 南京化学试剂股份有限公司 | Phthalic anhydride raw material treatment method |
Also Published As
Publication number | Publication date |
---|---|
JPS5845436B2 (en) | 1983-10-08 |
JPS5350132A (en) | 1978-05-08 |
DE2646808B2 (en) | 1979-01-25 |
CH633549A5 (en) | 1982-12-15 |
BE859720A (en) | 1978-04-14 |
DE2646808C3 (en) | 1979-09-20 |
DE2646808A1 (en) | 1978-04-20 |
FR2367759A1 (en) | 1978-05-12 |
FR2367759B1 (en) | 1982-11-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |