FR2367759B1 - - Google Patents

Info

Publication number: FR2367759B1
Authority: FR; France
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

Application number

FR7731062A

Other languages

Other versions

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Bayer AG

Original Assignee

Bayer AG

Priority date (The priority date 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 date listed.)

1976-10-16

Filing date

1977-10-14

Publication date

1982-11-12

1977-10-14 Application filed by Bayer AG filed Critical Bayer AG

1978-05-12 Publication of FR2367759A1 publication Critical patent/FR2367759A1/en

1982-11-12 Application granted granted Critical

1982-11-12 Publication of FR2367759B1 publication Critical patent/FR2367759B1/fr

Status Granted legal-status Critical Current

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)

FR7731062A 1976-10-16 1977-10-14 PHTHALIC ANHYDRIDE PURIFICATION PROCESS Granted FR2367759A1 (en)

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 (2)

Publication Number	Publication Date
FR2367759A1 FR2367759A1 (en)	1978-05-12
FR2367759B1 true FR2367759B1 (en)	1982-11-12

Family

ID=5990635

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR7731062A Granted FR2367759A1 (en)	1976-10-16	1977-10-14	PHTHALIC ANHYDRIDE PURIFICATION PROCESS

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)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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
RO59914A (en) *	1972-04-15	1976-06-15
DE2245555C2 (en) *	1972-09-16	1982-06-09	Bayer Ag, 5090 Leverkusen	Process for the production of anthraquinone

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 JP JP52122558A patent/JPS5845436B2/en not_active Expired
- 1977-10-14 BE BE2056340A patent/BE859720A/en unknown
- 1977-10-14 FR FR7731062A patent/FR2367759A1/en active Granted

Also Published As

Publication number	Publication date
GB1549533A (en)	1979-08-08
CH633549A5 (en)	1982-12-15
JPS5845436B2 (en)	1983-10-08
JPS5350132A (en)	1978-05-08
DE2646808C3 (en)	1979-09-20
DE2646808B2 (en)	1979-01-25
FR2367759A1 (en)	1978-05-12
DE2646808A1 (en)	1978-04-20
BE859720A (en)	1978-04-14

Publication	Publication Date	Title
FR2355935B1 (en)	1978-10-13
JPS52112617U (en)	1977-08-26
FR2367759B1 (en)	1982-11-12
JPS5539112B2 (en)	1980-10-08
JPS5543103B2 (en)	1980-11-04
JPS5525770Y2 (en)	1980-06-21
JPS5521562Y2 (en)	1980-05-23
JPS5624907Y2 (en)	1981-06-11
IN141909B (en)	1977-04-30
JPS5380948U (en)	1978-07-05
JPS537144U (en)	1978-01-21
JPS5350662U (en)	1978-04-28
JPS5313290U (en)	1978-02-03
JPS52118684U (en)	1977-09-08
CH612472A5 (en)	1979-07-31
CH512076A4 (en)	1977-06-30
CH614076A5 (en)	1979-10-31
CH613645A5 (en)	1979-10-15
CH593483A5 (en)	1977-12-15
CH613566A5 (en)	1979-09-28
CH613305A5 (en)	1979-09-14
CH613285A5 (en)	1979-09-14
CH613172A5 (en)	1979-09-14
CH613111A5 (en)	1979-09-14
CH604483A5 (en)	1978-09-15

Legal Events

Date	Code	Title	Description
1986-08-22	ST	Notification of lapse